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Award Detail

Awardee:REGENTS OF THE UNIVERSITY OF COLORADO, THE
Doing Business As Name:University of Colorado at Boulder
PD/PI:
  • Michael N Gooseff
  • (303) 735-5333
  • michael.gooseff@colorado.edu
Co-PD(s)/co-PI(s):
  • Andrew G Fountain
  • Cristina D Takacs-Vesbach
  • John C Priscu
Award Date:04/05/2011
Estimated Total Award Amount: $ 4,900,000
Funds Obligated to Date: $ 6,281,806
  • FY 2017=$37,668
  • FY 2012=$1,110,000
  • FY 2011=$1,038,686
  • FY 2013=$2,027,452
  • FY 2015=$1,040,000
  • FY 2016=$980,000
  • FY 2014=$48,000
Start Date:04/15/2011
End Date:09/30/2017
Transaction Type:Grant
Agency:NSF
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.078
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Increased Connectivity in a Polar Desert Resulting from Climate Warming: McMurdo Dry Valley LTER Program
Federal Award ID Number:1115245
DUNS ID:007431505
Parent DUNS ID:007431505
Program:ANT Integrated System Science

Awardee Location

Street:3100 Marine Street, Room 481
City:Boulder
State:CO
ZIP:80303-1058
County:Boulder
Country:US
Awardee Cong. District:02

Primary Place of Performance

Organization Name:University of Colorado at Boulder
Street:3100 Marine Street, Room 481
City:Boulder
State:CO
ZIP:80303-1058
County:Boulder
Country:US
Cong. District:02

Abstract at Time of Award

The McMurdo Dry Valleys (MDV) is a polar desert on the coast of East Antarctica, a region that has not yet experienced climate warming. The McMurdo Dry Valleys Long Term Ecological Research (MCMLTER) project has documented the ecological responses of the glacier, soil, stream and lake ecosystems in the MDV during a cooling trend (from 1986 to 2000) which was associated with the depletion of atmospheric ozone. In the past decade, warming events with strong katabatic winds occurred during two summers and the resulting high streamflows and sediment deposition changed the dry valley landscape, possibly presaging conditions that will occur when the ozone hole recovers. In anticipation of future warming in Antarctica, the overarching hypothesis of the proposed project is: Climate warming in the McMurdo Dry Valley ecosystem will amplify connectivity among landscape units leading to enhanced coupling of nutrient cycles across landscapes, and increased biodiversity and productivity within the ecosystem. Warming in the MDV is hypothesized to act as a slowly developing, long-term press of warmer summers, upon which transient pulse events of high summer flows and strong katabatic winds will be overprinted. Four specific hypotheses address the ways in which pulses of water and wind will influence contemporary and future ecosystem structure, function and connectivity. Because windborne transport of biota is a key aspect of enhanced connectivity from katabatic winds, new monitoring will include high-resolution measurements of aeolian particle flux. Importantly, integrative genomics will be employed to understand the responses of specific organisms to the increased connectivity. The project will also include a novel social science component that will use environmental history to examine interactions between human activity, scientific research, and environmental change in the MDV over the past 100 years. To disseminate this research broadly, MCM scientists will participate in a wide array of outreach efforts ranging from presentations in K-12 classrooms to bringing undergraduates and teachers to the MDV to gain research experience. Planned outreach programs will build upon activities conducted during the International Polar Year (2007-2008), which include development of an interactive DVD for high school students and teachers and publication of a children's book in the LTER Schoolyard Book Series. A teacher's edition of the book with a CD containing lesson plans will be distributed. The project will develop programs for groups traditionally underrepresented in science arenas by publishing some outreach materials in Spanish.

Publications Produced as a Result of this Research

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Khan, Alia L. and McMeeking, Gavin and Schwarz, Joshua P. and Xian, Peng and Kathleen A. Welch and W Berry Lyons and Diane M McKnight "Near-surface refractory black carbon observations in the atmosphere and snow in the McMurdo Dry Valleys, Antarctica and potential impacts of foehn winds" Journal of Geophysical Research: Atmospheres, v., 2018, p.. doi:10.1002/2017JD027696 

Sudman, Zachary and Michael N. Gooseff and Andrew G Fountain and Joseph S. Levy and Maciek K. Obryk and David J. Van Horn "Impacts of permafrost degradation on a stream in Taylor Valley, Antarctica" Geomorphology, v.285, 2017, p.205 - 213. doi:10.1016/j.geomorph.2017.02.009 

Singley, Joel G. and Wlostowski, Adam and Bergstrom, Anna J. and Eric R. Sokol and Torrens, Christa L. and Chris Jaros and Wilson, Colleen E. and Hendrickson, Patrick J. and Michael N. Gooseff "Characterizing hyporheic exchange processes using high-frequency electrical conductivity-discharge relationships on subhourly to interannual timescales" Water Resources Research, v.53, 2017, p.4124 - 41. doi:10.1002/wrcr.v53.510.1002/2016WR019739 

Carmichael, Joshua D.; Pettit, Erin C.; Hoffman, Matt; Fountain, Andrew; Hallet, Bernard "Seismic multiplet response triggered by melt at Blood Falls, Taylor Glacier, Antarctica" JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE, v.117, 2012, p.1-20.

Knox, M. A., D. H. Wall, R. A. Virginia, M. L. Vandegehuchte, I. S. Gil, and B. J. Adams "Impact of diurnal freeze-thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica" Polar Biology, v.39, 2016, p.583.

Howkins, Adrian "Taylor's Valley: What the History of Antarctica's 'Heroic Era' Can Contribute to Contemporary Ecological Research in the McMurdo Dry Valleys" Environment and History, v.22, 2016, p.3-28. doi:10.3197/096734016X14497391602125 

Leslie, D.L. and Kathleen A. Welch and W Berry Lyons "A temporal stable isotopic (?18O, ?D, d-excess) comparison in glacier meltwater streams, Taylor Valley, Antarctica" Hydrological Processes, v.31, 2017, p.3069 - 30. doi:10.1002/hyp.v31.1710.1002/hyp.11245 

Hicks, Alison and Howkins, Adrian "Tipping the Iceberg: A Collaborative Approach to Redesigning the Undergraduate Research Assignment in an Antarctic History Capstone Seminar" The History Teacher, v.48, 2015, p.339.

Dieser, M., Foreman, C.M., Jaros, C., Lisle, J.T., Greenwood, M.C., Laybourn-Parry, J., Miller, P.L., Chin, Y.-P. and McKnight, D.M. "Physicochemical and biological dynamics in a coastal Antarctic lake as it transitions from frozen to open water" Antarctic Science, v., 2013, p..

Priscu, J.C. "Subglacial Lakes, Antarctica." Encylopedia of Snow, Ice and Glaciers, v., 2011, p..

Kohler, Tyler J. and Stanish, Lee F. and Crisp, Stenven and Koch, J. and Liptzin, D. and Baeseman, J. and McKnight, Diane M "Long-Term Hydrologic Control of Microbial Mat Abundance in McMurdo Dry Valley Streams, Antarctica" Ecosystems, v.18, 2015, p.310-327.

Fountain, A.G., Fernandez-Diaz, J.C., Obryk, M., Levy, J., Gooseff, M., Van Horn, D.J., Morin, P., and Shrestha, R "High-resolution elevation mapping of the McMurdo Dry Valleys, Antarctica, and surrounding regions" Earth System Science Data, v., 2017, p.435. doi:10.5194/essd-9-435-2017 

Fountain, Andrew G.; Campbell, John L.; Schuur, Edward A. G.; Stammerjohn, Sharon E.; Williams, Mark W.; Ducklow, Hugh W. "The Disappearing Cryosphere: Impacts and Ecosystem Responses to Rapid Cryosphere Loss" BIOSCIENCE, v.62, 2012, p.405-415.

D?Andrilli, Juliana and Foreman, Christine M. and Marshall, Alan G. and McKnight, Diane M "Characterization of IHSS Pony Lake fulvic acid dissolved organic matter by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and fluorescence spectroscopy" Organic Geochemistry, v., 2013, p.. doi:10.1016/j.orggeochem.2013.09.013 

Wall, Diana H. and Nielsen, Uffe N. and Six, Johan "Soil biodiversity and human health" Nature, v.528, 2015, p.69-76. doi:10.1038/nature15744 

Obryk, M.K., P.T. Doran, J.A. Hicks, C.P. McKay and J.C. Priscu "Modeling the thickness of perennial ice covers on stratified lakes of the Taylor Valley, Antarctica" Journal of Glaciology, v.62, 2016, p.jog.2016.. doi:10.1017 

Jungblut, A. D. and Hawes, I. and Mackey, T. J. and Krusor, M. and Doran, P. T. and Sumner, D. Y. and Eisen, J. A. and Hillman, C. and Goroncy, A. K. "Microbial Mat Communities along an Oxygen Gradient in a Perennially Ice-Covered Antarctic Lake" Applied and Environmental Microbiology, v.82, 2016, p.620-630. doi:10.1128/aem.02699-15 

Sokol, Eric R. and Brown, Bryan L. and Carey, Cayelan C. and Tornwall, Brett M. and Swan, Christopher M. and Barrett, J. E. "Linking management to biodiversity in built ponds using metacommunity simulations" Ecological Modelling, v.296, 2015, p.36-45. doi:10.1016/j.ecolmodel.2014.10.022 

Bishop, Ian W. and Sarah A. Spaulding "Life cycle size dynamics in Didymosphenia geminata (Bacillariophyceae)" Journal of Phycology, v.53, 2017, p.652 - 663. doi:10.1111/jpy.2017.53.issue-310.1111/jpy.12528 

Hall, Brenda L. and Denton, George H. and Heath, Stephanie L. and Jackson, Margaret S. and Koffman, Tobias N. B. "Accumulation and marine forcing of ice dynamics in the western Ross Sea during the last deglaciation" Nature Geoscience, v.8, 2015, p.625 - 628. doi:10.1038/ngeo2478 

Thurman, Jill; Parry, Jacqueline; Hill, Philip J.; Priscu, John C.; Vick, Trista J.; Chiuchiolo, Amy; Laybourn-Parry, Johanna "Microbial dynamics and flagellate grazing during transition to winter in Lakes Hoare and Bonney, Antarctica" FEMS MICROBIOLOGY ECOLOGY, v.82, 2012, p.449-458.

Fountain, A.G. Basagic, H.J., Niebuhr, S. "Glaciers in equilibrium, McMurdo Dry Valleys Antarctica." Journal of Glaciology, v., 2016, p.jog.2016.. doi:10.1017 

Ball, Becky A.; Virginia, Ross A. "Meltwater seep patches increase heterogeneity of soil geochemistry and therefore habitat suitability" GEODERMA, v.189, 2012, p.652-660.

Geyer, K. M. and Altrichter, A. E. and Takacs-Vesbach, C. D. and Van Horn, D. J. and Gooseff, M. N. and Barrett, J. E. "Bacterial community composition of divergent soil habitats in a polar desert" Fems Microbiology Ecology, v.89, 2014, p.490-494. doi:Doi 10.1111/1574-6941.12306 

Van Horn, DJ, Wolf, CR, Colman, DR, Jiang, X, Kohler, TJ, McKnight, DM, Stanish, LF, Yazzie, T, Takacs-Vesbach, C "Patterns of bacterial biodiversity in the glacial meltwater streams of the McMurdo Dry Valleys, Antarctica" FEMS Microbiology Ecology, v., 2016, p.femsec/fi. doi:10.1093 

Cullis, James D. S. Stanish, Lee F. McKnight, Diane M. "Diel flow pulses drive particulate organic matter transport from microbial mats in a glacial meltwater stream in the McMurdo Dry Valleys" Water Resources Research, v., 2014, p.. doi:10.1002/2013WR014061 

Vanderbilt, Kristin L. and Lin, Chau-Chin and Lu, Sheng-Shan and Kassim, Abd Rahman and He, Honglin and Guo, Xuebing and Gil, Inigo San and Blankman, David and Porter, John H. "Fostering ecological data sharing: collaborations in the International Long Term Ecological Research Network" Ecosphere, v.6, 2015, p.. doi:10.1890/es14-00281.1 

Hawes, I. and Giles, H. and Doran, P. T. "Estimating photosynthetic activity in microbial mats in an ice-covered Antarctic lake using automated oxygen microelectrode profiling and variable chlorophyll fluorescence" Limnology and Oceanography, v.59, 2014, p.674-688. doi:DOI 10.4319/lo.2014.59.3.0674 

Zeglin, LH; Dahm, CN; Barrett, JE; Gooseff, MN; Fitpatrick, SK; Takacs-Vesbach, CD "Bacterial Community Structure Along Moisture Gradients in the Parafluvial Sediments of Two Ephemeral Desert Streams" MICROBIAL ECOLOGY, v.61, 2011, p.543. doi:10.1007/s00248-010-9782-  View record at Web of Science

Levy, J. and Nolin, A. and Fountain, A. and Head, J. "Hyperspectral measurements of wet, dry and saline soils from the McMurdo Dry Valleys: soil moisture properties from remote sensing" Antarctic Science, v.26, 2014, p.565-572. doi:Doi 10.1017/S0954102013000977 

Nielsen, UN; Ayres, E; Wall, DH; Bardgett, RD "Soil biodiversity and carbon cycling: a review and synthesis of studies examining diversity-function relationships" EUROPEAN JOURNAL OF SOIL SCIENCE, v.62, 2011, p.105. doi:10.1111/j.1365-2389.2010.01314.  View record at Web of Science

Smith T.E., Wall D.H., Hogg I.D., Adams B.J., Nielsen U.N., Virginia R.A. "Thawing permafrost alters nematode populations and soil habitat characteristics in an Antarctic polar desert ecosystem" Pedobiologia, v., 2012, p..

Levy, J.S. and Fountain, A.G., Welch, K.A., and Lyons, W.B. "Hypersaline wet patches in Taylor Valley, Antarctica" Geophysical Research Letters, v., 2012, p..

Ferrera, I., H. Sarmento, J.C. Priscu, A. Chiuchiolo, J.M. González and H-P. Grossart "Diversity and Distribution of Freshwater Aerobic Anoxygenic Phototrophic Bacteria across a Wide Latitudinal Gradient" Frontiers in Microbiology, v.8, 2017, p.fmicb.201. doi:10.3389 

Nielsen, U. N. and Ayres, E. and Wall, D. H. and Li, G. and Bardgett, R. D. and Wu, T. H. and Garey, J. R. "Global-scale patterns of assemblage structure of soil nematodes in relation to climate and ecosystem properties" Global Ecology and Biogeography, v.23, 2014, p.968-978. doi:Doi 10.1111/Geb.12177 

Chown, S. L., J. E. Lee, K. A. Hughes, J. Barnes, P. J. Barrett, D. M. Bergstrom, P. Convey,3 D. A. Cowan, K. Crosbie, G. Dyer, Y. Frenot, S. M. Grant, D. Herr, M. C. Kennicutt, M. Lamers, A. Murray, H. P. Possingham, K. Reid, M. J. Riddle, P. G. Ryan, Lo "Challenges to the future conservation of the Antarctic" Science, v.337, 2012, p.158-159. doi:10.1126/science.1222821 

Fricker, H.A., R. Powell, J.C. Priscu, S. Tulaczyk, S. Anandakrishnan, B. Christner, D. Holland, H. Horgan, R., J.Mikucki, A. Mitchell, R. Scherer, J. Severinghaus. "Siple Coast Subglacial Aquatic Environments: The Whillans Ice Stream Subglacial Access Research Drilling (WISSARD) project. In Subglacial Antarctic Aquatic Environments" ., v., 2011, p..

Bagshaw, Elizabeth and Tranter, Martyn and Fountain, Andrew G and Welch, Kathleen A. and Basagic, Hassan J. and Lyons, W Berry "Do Cryoconite Holes have the Potential to be Significant Sources of C, N, and P to Downstream Depauperate Ecosystems of Taylor Valley, Antarctica?" Arctic, Antarctic, and Alpine Research, v., 2013, p.. doi:10.1016/j.quageo.2013.04.002 

Achberger, Amanda and Brent C. Christner and Alexander B. Michaud and Priscu, John C and Skidmore, Mark L. and Trista J. Vick-Majors "Microbial Community Structure of Subglacial Lake Whillans, West Antarctica" Frontiers in Microbiology, v.7, 2016, p.. doi:10.3389/fmicb.2016.01457 

Li, W, Podar, M, Morgan-Kiss, RM "Ultrastructural and Single-Cell-Level Characterization Reveals Metabolic Versatility in a Microbial Eukaryote Community from an Ice-Covered Antarctic Lake" Applied and Environmental Microbiology, v., 2016, p.AEM.00478. doi:10.1128 

Warnock, J.P. and Doran, P.T. "Distribution of Siliceous-Walled Algae in Taylor Valley, Antarctica Lakes" International Journal of Geosciences, v., 2013, p.. doi:10.4236/ijg.2013.44064 

Foley, Neil and Tulaczyk, Slawek and Auken, Esben and Schamper, Cyril and Dugan, Hilary and Mikucki, Jill and Virginia, Ross and Doran, Peter "Helicopter-borne transient electromagnetics in high-latitude environments: An application in the McMurdo Dry Valleys, Antarctica" GEOPHYSICS, v.81, 2016, p.WA87-WA99. doi:doi:10.1190/geo2015-0186.1 

Vick TJ, Priscu JC "Bacterioplankton productivity in lakes of the Taylor Valley, Antarctica, during the polar night transition" Aquat Microb Ecol, v.68, 2012, p.77-90. doi:10.3354/ame01604 

Wall, DH; Lyons, WB; Chown, SL; Convey, P; Howard-Williams, C; Quesada, A; Vincent, WF "Long-term ecosystem networks to record change: an international imperative" ANTARCTIC SCIENCE, v.23, 2011, p.209. doi:10.1017/S095410201100031  View record at Web of Science

Fountain, A., Saba, G., Adams, B., Doran, P., Fraser, W., Gooseff, M., Obryk, M., Priscu, J., Stammerjohn, S., Virginia, R. "The Impact of a Large-Scale Climate Event on Antarctic Ecosystem Processes" BioScience, v.66, 2016, p.biosci/bi. doi:10.1093 

Langford, Z. L. and Gooseff, Michael N. and Lampkin, Derrick J. "Spatiotemporal Dynamics of Wetted Soils across a Polar Desert Landscape, McMurdo Dry Valleys Antarctica" Antarctic Science, v.27, 2015, p.197-209. doi:10.1017/s0954102014000601 

Fountain, A.G., Ducklow, H.W., Campbell, J.L., Schuur, E.A.G., Stammerjohn, S.E., and Williams, M.W. "The disappearing cryosphere: Impacts and ecosystem responses to rapid cryosphere loss" Bioscience, v., 2012, p..

Castendyk, D. and McKnight, D. and Welch, K. and Niebuhr, S. and Jaros, C. "Pressure-driven, shoreline currents in a perennially ice-covered, pro-glacial lake in Antarctica, identified from a LiCl tracer injected into a pro-glacial stream" Hydrological Processes, v.29, 2015, p.2212-2231. doi:10.1002/hyp.10352 

Horn, D.J.V., Van Horn, M.L., Barrett, J.E., Gooseff, M.N., Altrichter, A.E., Geyer, K.M., Zeglin, L.H. and Takacs-Vesbach, C. "Factors Controlling Soil Microbial Biomass and Bacterial Diversity and Community Composition in a Cold Desert Ecosystem: Role of Geographic Scale" PLoS ONE, v., 2013, p.. doi:10.1371/journal.pone.0066103.s003 

Gooseff, MN, DM McKnight, P Doran, AG Fountain, and WB Lyons. "Hydrological connectivity of the landscape of the McMurdo Dry Valleys, Antarctica." Geography Compass, v.5, 2011, p..

Fountain, A.G. Basagic, H.J., Niebuhr, S "Glaciers in equilibrium, McMurdo Dry Valleys Antarctica" Journal of Glaciology, v., 2016, p.. doi:10.1017/jog.2016.86 

Fierer, N., J. W. Leff, B. J. Adams, U. N. Nielsen, S. T. Bates, C. L. Lauber, S. Owens, J. A. Gilbert, D. H. Wall, and J. G. Caporaso "Cross-biome metagenomic analyses of soil microbial communities and their functional attributes" Proceedings of the National Academy of Sciences of the United States of America, v.109, 2012, p.21390?213. doi:10.1073/pnas.1215210110 

Lyons, W. B., Bullen, T. D., & Welch, K. A. "Ca isotopic geochemistry of an Antarctic aquatic system." Geophysical Research Letters, v.44, 2017, p.882. doi:10.1002 

Mikucki, J. A. and Auken, E. and Tulaczyk, S. and Virginia, R. A. and Schamper, C. and Sorensen, K. I. and Doran, P. T. and Dugan, H. and Foley, N. "Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley" Nature Communications, v.6, 2015, p.. doi:10.1038/ncomms7831 

Nielsen, Uffe N. and Wall, Diana H. and Six, Johan "Soil Biodiversity and the Environment" Annual Review of Environment and Resources, v.40, 2015, p.63-90. doi:doi:10.1146/annurev-environ-102014-021257 

Gooseff, M. N. and Van Horn, D. and Sudman, Z. and McKnight, D. M. and Welch, K. A. and Lyons, W. B. "Stream biogeochemical and suspended sediment responses to permafrost degradation in stream banks in Taylor Valley, Antarctica" Biogeosciences, v.13, 2016, p.1723-1732. doi:10.5194/bg-13-1723-2016 

Michaud, Alexander B.; Sabacka, Marie; Priscu, John C. "Cyanobacterial diversity across landscape units in a polar desert: Taylor Valley, Antarctica" FEMS MICROBIOLOGY ECOLOGY, v.82, 2012, p.268-278.

Nielsen U.N., Wall D.H., Adams B.J., Virginia R.A., Ball B.A., Gooseff M.N., McKnight D.M "The ecology of pulse events: insights from an extreme climatic event in a polar desert ecosystem" Ecosphere, v., 2012, p..

Morgan-Kiss, R. M. and Lizotte, M. P. and Kong, W. and Priscu, J. C. "Photoadaptation to the polar night by phytoplankton in a permanently ice-covered Antarctic lake" Limnology and Oceanography, v.61, 2016, p.3-13. doi:10.1002/lno.10107 

Sylvain, ZA; Wall, DH "LINKING SOIL BIODIVERSITY AND VEGETATION: IMPLICATIONS FOR A CHANGING PLANET" AMERICAN JOURNAL OF BOTANY, v.98, 2011, p.517. doi:10.3732/ajb.100030  View record at Web of Science

Pearce, DA, Alekhina, IA, Terauds, A, Wilmotte, A, Quesada, A, Edwards, A, Dommergue, A, Sattler, B, Adams, B, Magalhaes, C, Chu, W-L, Lau, MCY, Cary, CS, Smith, DJ, Wall, DH, Eguren, G, Matcher, G, Bradley, JA, de Vera, J-P, Elster, J, Hughes, KA, Cuthbe "Aerobiology Over Antarctica ? A New Initiative for Atmospheric Ecology" Frontiers in Microbiology, v., 2016, p.fmicb.201. doi:10.3389 

Obryk, M. K. and Doran, P. T. and Priscu, J. C. "The permanent ice cover of Lake Bonney, Antarctica: The influence of thickness and sediment distribution on photosynthetically available radiation and chlorophyll-a distribution in the underlying water column" Journal of Geophysical Research-Biogeosciences, v.119, 2014, p.1879-1891. doi:Doi 10.1002/2014jg002672 

Kown, M., M. Kim, C. Takacs-Vesbach, J. Lee, S.G. Hong, S.J. Kim, J.C. Priscu and O.-S. Kim "Niche specialization of bacteria in permanently ice-covered lakes of the McMurdo Dry Valleys, Antarctica." Environmental Microbiology, v., 2017, p.1462-2920. doi:10.1111 

Cozzetto, K and Bencala, Kenneth E. and Gooseff, Michael N. and McKnight, Diane M "The influence of stream thermal regimes and preferential flow paths on hyporheic exchange in a glacial meltwater stream" Water Resources Research, v., 2013, p.. doi:10.1002/wrcr.20410 

Ball, B. A., Barrett, J. E., M. N. Gooseff, R. A. Virginia, and D. H. Wall "Soil biology and biogeochemical cycling following melt water pulse events in a polar desert" Polar Research, v., 2011, p..

Obryk, MK, Doran, PT, Priscu, JC "The permanent ice-cover of Lake Bonney, Antarctica: The influence of thickness and sediment distribution on photosynthetically available radiation and chlorophyll-a distribution in the underlying water column." Journal of Geophysical Research-Biogeosciences, v., 2014, p.. doi:DOI:10.1002/2014JG002672 

Smith, Melinda D. and La Pierre, Kimberly J. and Collins, Scott L. and Knapp, Alan K. and Gross, Katherine L. and Barrett, John E. and Frey, Serita D. and Gough, Laura and Miller, Robert J. and Morris, James T. and Rustad, Lindsey E. and Yarie, John "Global environmental change and the nature of aboveground net primary productivity responses: insights from long-term experiments" Oecologia, v.177, 2015, p.935-947. doi:10.1007/s00442-015-3230-9 

Stanish, Lee F.; Kohler, Tyler J.; Esposito, Rhea M. M.; Simmons, Breana L.; Nielsen, Uffe N.; Wall, Diana H.; Nemergut, Diana R.; McKnight, Diane M. "Extreme streams: flow intermittency as a control on diatom communities in meltwater streams in the McMurdo Dry Valleys, Antarctica" CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, v.69, 2012, p.1405-1419.

Dugan, Hilary A. and Arcone, Steven A. and Obryk, Maciej K. and Doran, Peter T. "High-resolution ground-penetrating radar profiles of perennial lake ice in the McMurdo Dry Valleys, Antarctica: Horizon attributes, unconformities, and subbottom penetration" GEOPHYSICS, v.81, 2016, p.WA13-WA20. doi:doi:10.1190/geo2015-0159.1 

Bielewicz, S; Bell, E; Kong, WD; Friedberg, I; Priscu, JC; Morgan-Kiss, RM "Protist diversity in a permanently ice-covered Antarctic Lake during the polar night transition" ISME JOURNAL, v.5, 2011, p.1559. doi:10.1038/ismej.2011.2  View record at Web of Science

Eveland, J., Gooseff, M.N., Lampkin, D.J., Barrett, J.E. and Takacs-Vesbach, C. "Spatial and temporal patterns of snow accumulation and aerial ablation across the McMurdo Dry Valleys, Antarctica" Hydrological Processes, v., 2013, p.. doi:10.1002/hyp.9407 

Warrier, Rohit B. and Castro, Clara M. and Hall, Chris M. and Kenig, Fabien and Doran, Peter T. "Reconstructing the evolution of Lake Bonney, Antarctica using dissolved noble gases" Applied Geochemistry, v.58, 2015, p.46 - 61. doi:10.1016/j.apgeochem.2015.02.013 

Xu, Y, Vick-Majors, TJ, Morgan-Kiss, R, Priscu, JC, Amaral-Zettler, L "Ciliate diversity, community structure and novel taxa in lakes of the McMurdo Dry Valleys, Antarctica" Biological Bulletin, v., 2014, p.. doi:0006-3185 

Levy, JS; Fountain, AG; Gooseff, MN; Welch, KA; Lyons, WB "Water tracks and permafrost in Taylor Valley, Antarctica: Extensive and shallow groundwater connectivity in a cold desert ecosystem" GEOLOGICAL SOCIETY OF AMERICA BULLETIN, v.123, 2011, p.2295. doi:10.1130/B30436.  View record at Web of Science

Levy, J.S., Fountain, A.G., O'Connor, J.E., Welch, K.A. and Lyons, W.B. "Garwood Valley, Antarctica: A new record of Last Glacial Maximum to Holocene glaciofluvial processes in the McMurdo Dry Valleys" Geological Society of America Bulletin, v., 2013, p.. doi:10.1130/b30783.1 

Leslie, D. and Lyons, W. B. and Warner, N. and Vengosh, A. and Olesik, J. and Welch, K. and Deuerling, K. "Boron isotopic geochemistry of the McMurdo Dry Valley lakes, Antarctica" Chemical Geology, v.386, 2014, p.152-164. doi:10.1016/j.chemgeo.2014.08.016 

Stanish, L.F., Bagshaw, E., McKnight, D.M., Fountain, A.G. and Tranter, M. "Environmental factors influencing diatom communities in Antarctic cryoconite holes" Environmental Research Letters, v., 2013, p.. doi:10.1088/1748-9326/8/4/045006 

Priscu, J.C. and K.P. Hand "The microbial habitability of extraterrestrial icy worlds: A view from Earth" Microbe, v.7, 2012, p.167-172.

Shaw, E. Ashley and Byron Adams and John E. Barrett and W Berry Lyons and Ross A. Virginia and Diana H. Wall "Stable C and N isotope ratios reveal soil food web structure and identify the nematode Eudorylaimus antarcticus as an omnivore{\textendash}predator in" Taylor Valley, Antarctica, v.Polar Biology, , p.2018.

Castendyk, Devin and Maciek K. Obryk and Leidman, Sasha Z. and Michael N. Gooseff and Ian Hawes "Lake Vanda: A sentinel for climate change in the McMurdo Sound Region of Antarctica" Global and Planetary Change, v.144, 2016, p.213 - 227. doi:10.1016/j.gloplacha.2016.06.007 

Vick-Majors, Trista J. and Achberger, Amanda and Santibáñez, Pamela and Dore, John E. and Hodson, Timothy and Michaud, Alexander B. and Christner, Brent C. and Mikucki, Jill and Skidmore, Mark L. and Powell, Ross and Adkins, W. Peyton and Barbante, Carlo "Biogeochemistry and microbial diversity in the marine cavity beneath the McMurdo Ice Shelf, Antarctica" Limnology and Oceanography, v.61, 2016, p.572-586. doi:10.1002/lno.10234 

Gutt, J.; Adams, B.; Bracegirdle, T.; Cowan, D.; Cummings, V.; di Prisco, G.; Gradinger, R.; Isla, E.; McIntyre, T.; Murphy, E.; Peck, L.; Schloss, I.; Smith, C.; Suckling, C.; Takahashi, A.; Verde, C.; Wall, DH.; Xavier, J. "Antarctic Thresholds - Ecosystem Resilience and Adaptation: a new SCAR-Biology Programme." Polarforschung, v., 2013, p.. doi:hdl:10013/epic.42531.d001 

Dugan, H.A., Obryk, M.K. and Doran, P.T. "Lake ice ablation rates from permanently ice-covered Antarctic lakes" Journal of Glaciology, v., 2013, p.. doi:10.3189/2013JoG12J080 

Convey, P. and Chown, S. L. and Clarke, A. and Barnes, D. K. A. and Bokhorst, S. and Cummings, V. and Ducklow, H. W. and Frati, F. and Green, T. G. A. and Gordon, S. and Griffiths, H. J. and Howard-Williams, C. and Huiskes, A. H. L. and Laybourn-Parry, J. "The spatial structure of Antarctic biodiversity" Ecological Monographs, v.84, 2014, p.203-244. doi:Doi 10.1890/12-2216.1 

Levy, J. and Fountain, A. and Lyons, W. B. and Welch, K. "Experimental formation of pore fluids in McMurdo Dry Valleys soils" Antarctic Science, v.27, 2015, p.163-171. doi:10.1017/s0954102014000479 

Wlostowski, A, Gooseff, MN, McKnight, DM, Jaros, C, W Lyons, B "Patterns of hydrologic connectivity in the McMurdo dry valleys, Antarctica: a synthesis of 20 years of hydrologic data" Hydrological Processes, v., 2016, p.hyp.10818. doi:10.1002 

Sylvain, Z. A. and Wall, D. H. and Cherwin, K. L. and Peters, D. P. C. and Reichmann, L. G. and Sala, O. E. "Soil animal responses to moisture availability are largely scale, not ecosystem dependent: insight from a cross-site study" Global Change Biology, v.20, 2014, p.2631-2643. doi:Doi 10.1111/Gcb.12522 

Darling, Joshua P. and Garland, Deena D. and Lee F. Stanish and Rhea M.M. Esposito and Eric R. Sokol and Diane M McKnight "Thermal autecology describes the occurrence patterns of four benthic diatoms in McMurdo Dry Valley streams" Polar Biology, v.40, 2017, p.2381-2396. doi:10.1007/s00300-017-2151-y 

Levy, J.S., Fountain, A.G., Dickson, J.L., Head, J.W., Okal, M., Marchant, D.R. and Watters, J. "Accelerated thermokarst formation in the McMurdo Dry Valleys, Antarctica" Scientific Reports, v., 2013, p.. doi:10.1038/srep02269 

Heindel, R. C., A. M. Spickard, and R. A. Virginia "Landscape-scale soil phosphorus variability in the McMurdo Dry Valleys, Antarctica." Antarctic Science, v., 2017, p.S09541020. doi:10.1017 

Priscu, J.C "Unravelling Ecosystem Responses to Climate Change on the Antarctic Continent Through Long Term Ecological Research" BioScience, v.66, 2016, p.biosci/bi. doi:10.1093 

Miye Kwon, Mincheol Kim, Cristina Takacs?Vesbach, Jaejin Lee, Soon Gyu Hong, Sang Jong Kim, John C Priscu, Ok?Sun Kim "Niche specialization of bacteria in permanently ice?covered lakes of the McMurdo Dry Valleys, Antarctica" Environmental Microbiology, v., 2017, p.. doi:10.1111/1462-2920.13721 

Kohler, T. J. and Stanish, L. F. and Crisp, S. W. and Koch, J. C. and Liptzin, D. and Baeseman, J. L. and McKnight, D. M. "Life in the Main Channel: Long-Term Hydrologic Control of Microbial Mat Abundance in McMurdo Dry Valley Streams, Antarctica" Ecosystems, v.18, 2015, p.310-327. doi:10.1007/s10021-014-9829-6 

Yang, N. F. and Welch, K. A. and Mohajerin, T. J. and Telfeyan, K. and Chevis, D. A. and Grimm, D. A. and Lyons, W. B. and White, C. D. and Johannesson, K. H. "Comparison of arsenic and molybdenum geochemistry in meromictic lakes of the McMurdo Dry Valleys, Antarctica: Implications for oxyanion-forming trace element behavior in permanently stratified lakes" Chemical Geology, v.404, 2015, p.110-125. doi:10.1016/j.chemgeo.2015.03.029 

Bowman, J.S., T.J. Vick-Majors, R. Morgan-Kiss, C. Takacs-Vesbach, H.W. Ducklow and J.C. Priscu "Microbial Community Dynamics in Two Polar Extremes: The Lakes of the McMurdo Dry Valleys and the West Antarctic Peninsula Marine Ecosystem" BioScience, v.66, 2016, p.biosci/bi. doi:10.1093 

Witherow, R. A., and W. B. Lyons "The fate of minor alkali elements in the chemical evolution of salt lakes" Saline Systems, v., 2011, p..

Eveland, J., Gooseff, M.N., Lampkin, D.J., Barrett, J.E. and Takacs-Vesbach, C. "Seasonal controls on snow distribution and aerial ablation at the snow-patch and landscape scales, McMurdo Dry Valleys, Antarctica" The Cryosphere, v., 2013, p.. doi:10.5194/tc-7-917-2013 

Kohler, TJ, Van Horn, DJ, Darling, JP, Takacs-Vesbach, C, McKnight, DM "Nutrient treatments alter microbial mat colonization in two glacial meltwater streams from the McMurdo Dry Valleys, Antarctica" FEMS Microbiology Ecology, v., 2016, p.femsec/fi. doi:10.1093 

Kennicutt, M. C. and Chown, S. L. and Cassano, J. J. and Liggett, D. and Peck, L. S. and Massom, R. and Rintoul, S. R. and Storey, J. and Vaughan, D. G. and Wilson, T. J. and Allison, I. and Ayton, J. and Badhe, R. and Baeseman, J. and Barrett, P. J. and "A roadmap for Antarctic and Southern Ocean science for the next two decades and beyond" Antarctic Science, v.27, 2015, p.3-18. doi:10.1017/s0954102014000674 

Ball, B. A., J. E. Barrett, M. N. Gooseff, R. A. Virginia and D. H. Wall "Implications for melt water pulse events for soil biology and biogeochemical cycling in a polar desert" Polar Research, v.30, 2011, p..

Kohler, Tyler J. and Á, ?INA and Vijver, Bart Van de and PATRICK KOCIOLEK, J. "The genus Luticola D.G.Mann (Bacillariophyta) from the McMurdo Sound Region, Antarctica, with the description of four new species" Phytotaxa, v.208, 2015, p.103. doi:10.11646/phytotaxa.208.210.11646/phytotaxa.208.2.1 

Khan AL, Jaffé R, Ding Y, McKnight DM "Dissolved black carbon in Antarctic lakes: chemical signatures of past and present sources" Geophysical Research Letters, v., 2016, p.2016GL068. doi:10.1002 

Buelow, HN, Winter, AS, Van Horn, DJ, Barrett, JE, Gooseff, MN, Schwartz, E, Takacs-Vesbach, C "Microbial Community Responses to Increased Water and Organic Matter in the Arid Soils of the McMurdo Dry Valleys, Antarctica" Frontiers in Microbiology, v., 2016, p.fmicb.201. doi:10.3389 

Dolhi, J. M., N. Ketchum, R.M. Morgan-Kiss. "Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential." Journal of Visualized Experiments., v., 2012, p..

Schwartz, E. and Van Horn, D. J. and Buelow, H. N. and Okie, J. G. and Gooseff, M. N. and Barrett, J. E. and Takacs-Vesbach, C. D. "Characterization of growing bacterial populations in McMurdo Dry Valley soils through stable isotope probing with O-18-water" Fems Microbiology Ecology, v.89, 2014, p.415-425. doi:Doi 10.1111/1574-6941.12349 

Winslow, L. A. and Dugan, H. A. and Buelow, H. N. and Cronin, K. D. and Priscu, J. C. and Takacs-Vesbach, C. and Doran, P. T. "Autonomous Year-Round Sampling and Sensing to Explore the Physical and Biological Habitability of Permanently Ice-Covered Antarctic Lakes" Marine Technology Society Journal, v.48, 2014, p.8-17. doi:0025-3324 

Adams, B. J. and Wall, D. H. and Virginia, R. A. and Broos, E. and Knox, M. A. "Ecological Biogeography of the Terrestrial Nematodes of Victoria Land,Antarctica" Zookeys, v., 2014, p.29-71. doi:DOI 10.3897/zookeys.419.7180 

Okie, J. G. and Van Horn, D. J. and Storch, D. and Barrett, J. E. and Gooseff, M. N. and Kopsova, L. and Takacs-Vesbach, C. D. "Niche and metabolic principles explain patterns of diversity and distribution: theory and a case study with soil bacterial communities" Proceedings of the Royal Society B-Biological Sciences, v.282, 2015, p.. doi:10.1098/rspb.2014.2630 

Wu, TH; Ayres, E; Bardgett, RD; Wall, DH; Garey, JR "Molecular study of worldwide distribution and diversity of soil animals" PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.108, 2011, p.17720. doi:10.1073/pnas.110382410  View record at Web of Science

Hoffman, M. J. and Fountain, A. G. and Liston, G. E. "Near-surface internal melting: a substantial mass loss on Antarctic Dry Valley glaciers" Journal of Glaciology, v.60, 2014, p.361-374. doi:Doi 10.3189/2014jog13j095 

Velasco-Castrillon, Alejandro and McInnes, Sandra J. and Schultz, Mark B. and Arroniz-Crespo, Maria and D'Haese, Cyrille A. and Gibson, John A. E. and Adams, Byron and Page, Timothy J. and Austin, Andrew D. and Cooper, Steven J. B. and Stevens, Mark I. "Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica" Invertebrate Systematics, v.29, 2015, p.578. doi:10.1071/is14019 

Telling, J. and Anesio, A. M. and Tranter, M. and Fountain, A. G. and Nylen, T. and Hawkings, J. and Singh, V. B. and Kaur, P. and Musilova, M. and Wadham, J. L. "Spring thaw ionic pulses boost nutrient availability and microbial growth in entombed Antarctic Dry Valley cryoconite holes" Frontiers in Microbiology, v.5, 2014, p.. doi:Artn 694Doi 10.3389/Fmicb.2014.00694 

Matthew Knox and Andriuzzi, Walter S. and Heather N. Buelow and Cristina Takacs-Vesbach and Byron Adams and Diana H. Wall "Decoupled responses of soil bacteria and their invertebrate consumer to warming, but not freeze-thaw cycles, in the Antarctic Dry Valleys" Ecology Letters, v.20, 2017, p.1242-1249. doi:10.1111/ele.12819 

Gooseff, MN, Van Horn, DJ, Sudman, Z, McKnight, DM, Welch, KA, W Lyons, B "Stream biogeochemical and suspended sediment responses to permafrost degradation in stream banks in Taylor Valley, Antarctica" Biogeosciences, v., 2016, p.bg-13-172. doi:10.5194 

Heindel, Ruth C and W Berry Lyons and Sue Welch and Spickard, Angela M and Virginia, Ross A "Biogeochemical weathering of soil apatite grains in the McMurdo Dry Valleys, Antarctica" Geoderma, v.320, 2018, p.136-145. doi:10.1016/j.geoderma.2018.01.027 

Spigel, Robert H. and Priscu, John C and Maciek K. Obryk and Stone, William C. and Peter T. Doran "The physical limnology of a permanently ice-covered and chemically stratified Antarctic lake using high resolution spatial data from an autonomous underwater vehicle" Limnology and Oceanography, v., 2018, p.. doi:10.1002/lno.10768 

Michael N. Gooseff and John E. Barrett and Byron Adams and Peter T. Doran and Andrew G Fountain and W Berry Lyons and Diane M McKnight and Priscu, John C and Eric R. Sokol and Cristina Takacs-Vesbach and Martijn L. Vandegehuchte and Ross A. Virginia and D "Decadal ecosystem response to an anomalous melt season in a polar desert in Antarctica" Nature Ecology \& Evolution, v.1, 2017, p.1334-1338. doi:10.1038/s41559-017-0253-0 

Geyer, K.M., Altrichter, A.E., Horn, D.J.V., Takacs-Vesbach, C., Gooseff, M.N. and Barrett, J.E. "Environmental controls over bacterial communities in polar desert soils" Ecosphere, v., 2013, p.. doi:10.1890/es13-00048.1 

Kaelin M. Cawley Diane M McKnight Penney L. Miller Rose M. Cory Fimmen, Ryan L Guerard, Jennifer Markus Dieser Chris Jaros Yu-Ping Chin Christine M. Foreman "Characterization of fulvic acid fractions of dissolved organic matter during ice-out in a hyper-eutrophic, coastal pond in Antarctica" Environmental Research Letters, v., 2013, p.. doi:10.1088/1748-9326/8/4/045015 

Sokol, E.R., Herbold, C.W., Lee, C.K., Cary, S. and Barrett, J.E. "Local and regional influences over soil microbial metacommunities in the Transantarctic Mountains" Ecosphere, v., 2013, p.. doi:10.1890/es13-00136.1 

Allen, P. P. and Hewitt, R. and Obryk, M. K. and Doran, P. T. "Sediment transport dynamics on an ice-covered lake: the 'floating' boulders of Lake Hoare, Antarctica" Antarctic Science, v.27, 2015, p.173-184. doi:10.1017/s0954102014000558 

Levy, J. S. and Fountain, A. G. and Gooseff, M. N. and Barrett, J. E. and Vantreese, R. and Welch, K. A. and Lyons, W. B. and Nielsen, U. N. and Wall, D. H. "Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica" Antarctic Science, v.26, 2014, p.153-162. doi:Doi 10.1017/S095410201300045x 

Stanish, L. F., O'Neill, S. P., Gonzalez, A., Legg, T. M., Knelman, J., McKnight, D. M., Spaulding, S. and Nemergut, D. R. "Bacteria and diatom co-occurrence patterns in microbial mats from polar desert streams" Environmental Microbiology, v.15, 2012, p.1115?1131. doi:10.1111/j.1462-2920.2012.02872.x 

Lyons, WB; Welch, KA; Gardner, CB; Jaros, C; Moorhead, DL; Knoepfle, JL; Doran, PT "The geochemistry of upland ponds, Taylor Valley, Antarctica" ANTARCTIC SCIENCE, v.24, 2012, p.3. doi:10.1017/S095410201100061  View record at Web of Science

Herbei, R., A.L. Rytel, W.B. Lyons, D.M. McKnight, C. Jaros and J.C. Priscu "Hydrological Controls on Ecosystem Dynamics in Lake Fryxell, Antarctica" PLoS One, v.11, 2016, p.journal.p. doi:10.1371 

Sumner, Dawn Y. and Hawes, Ian and Mackey, Tyler J. and Jungblut, Anne D. and Doran, Peter T. "Antarctic microbial mats: A modern analog for Archean lacustrine oxygen oases" Geology, v.43, 2015, p.887-890. doi:10.1130/g36966.1 

Van Horn, D. J. and Okie, J. G. and Buelow, H. N. and Gooseff, M. N. and Barrett, J. E. and Takacs-Vesbach, C. D. "Soil Microbial Responses to Increased Moisture and Organic Resources along a Salinity Gradient in a Polar Desert" Applied and Environmental Microbiology, v.80, 2014, p.3034-3043. doi:Doi 10.1128/Aem.03414-13 

Hawes, Ian and Jungblut, Anne D. and Obryk, Maciej K. and Doran, Peter T. "Growth dynamics of a laminated microbial mat in response to variable irradiance in an Antarctic lake" Freshwater Biology, v.61, 2016, p.396-410. doi:10.1111/fwb.12715 

Pearce, David Anthony and Alekhina, Irina A and Terauds, Aleks and Wilmotte, Annick and Quesada, Antonio and Edwards, Arwyn and Dommergue, Aurélien and Sattler, Birgit and Adams, Byron and Magalhães, Catarina Maria and Chu, Wan-Loy and Lau, Maggie and Car "Aerobiology over Antarctica ? a new initiative for atmospheric ecology" Frontiers in Microbiology, v.7, 2016, p.. doi:10.3389/fmicb.2016.00016 

Beet C.R., Hogg I., Collins G.E., Cowan D.A., Wall D.H., Adams, B.J. "Genetic diversity among populations of Antarctic springtails (Collembola) within the Mackay Glacier ecotone" Genome, v., 2016, p.gen-2015-. doi:10.1139 

Priscu, J. C. and Laybourn-Parry, J. and Haggblom, M. "Polar and alpine microbiology in a changing world" Fems Microbiology Ecology, v.89, 2014, p.209-210. doi:Doi 10.1111/1574-6941.12371 

Kevin M. Geyer and Cristina Takacs-Vesbach and Michael N. Gooseff and John E. Barrett "Primary productivity as a control over soil microbial diversity along environmental gradients in a polar desert ecosystem" PeerJ, v.5, 2017, p.e3377. doi:10.7717/peerj.3377 

Bennett, K. R., I. D. Hogg, B. J. Adams, and P. D. N. Hebert "High levels of intraspecific genetic divergences revealed for Antarctic springtails: evidence for small-scale isolation during Pleistocene glaciation" Biological Journal of the Linnean Society, v.119, 2016, p.166.

Lyons, W. B. and Dailey, K. R. and Welch, K. A. and Deuerling, K. M. and Welch, S. A. and McKnight, D. M. "Antarctic streams as a potential source of iron for the Southern Ocean" Geology, v.43, 2015, p.1003-1006. doi:10.1130/g36989.1 

Ball, B. A. and Virginia, R. A. "Controls on diel soil CO2 flux across moisture gradients in a polar desert" Antarctic Science, v.27, 2015, p.527-534. doi:10.1017/s0954102015000255 

Michael N. Gooseff and Wlostowski, Adam and Diane M McKnight and Chris Jaros "Hydrologic connectivity and implications for ecosystem processes - Lessons from naked watersheds" Geomorphology, v.277, 2017, p.63 - 71. doi:10.1016/j.geomorph.2016.04.024 

Kohler, TylerJ. and Stanish, LeeF. and Crisp, StevenW. and Koch, JoshuaC. and Liptzin, Daniel and Baeseman, JennyL. and McKnight, DianeM. "Life in the Main Channel: Long-Term Hydrologic Control of Microbial Mat Abundance in McMurdo Dry Valley Streams, Antarctica" Ecosystems, v., 2014, p.1-18. doi:10.1007/s10021-014-9829-6 

Keilor Rojas-Jimenez, Christian Wurzbacher, Elizabeth Charlotte Bourne, Amy Chiuchiolo, John C. Priscu & Hans-Peter Grossart "Early diverging lineages within Cryptomycota and Chytridiomycota dominate the fungal communities in ice-covered lakes of the McMurdo Dry Valleys, Antarctica" Scientific Reports, v.7, 2017, p.. doi:doi:10.1038/s41598-017-15598-w 

Ball, Becky and Virginia, Ross A. "Controls on diel soil CO2 flux across moisture gradients in a polar desert" Antarctic Science, v., 2015, p.. doi:10.1017/s0954102015000255 

Nielsen, UN; Wall, DH; Adams, BJ; Virginia, RA "Antarctic nematode communities: observed and predicted responses to climate change" POLAR BIOLOGY, v.34, 2011, p.1701. doi:10.1007/s00300-011-1021-  View record at Web of Science

Sokol, ER, Brown, BL, Barrett, JE "A simulation-based approach to understand how metacommunity characteristics influence emergent biodiversity patterns" Oikos, v., 2016, p.oik.03690. doi:10.1111 

Zhang, L. and Jungblut, A. D. and Hawes, I. and Andersen, D. T. and Sumner, D. Y. and Mackey, T. J. "Cyanobacterial diversity in benthic mats of the McMurdo Dry Valley lakes, Antarctica" Polar Biology, v.38, 2015, p.1097-1110. doi:10.1007/s00300-015-1669-0 

Lyons, W.B., Leslie, D.L., Harmon, R.S., Neumann, K., Welch, K.A., Bisson, K.M. and McKnight, D.M. "The carbon stable isotope biogeochemistry of streams, Taylor Valley, Antarctica" Applied Geochemistry, v., 2013, p.. doi:10.1016/j.apgeochem.2012.08.019 

Allen, Phillip P. and Hewitt, Richard and Obryk, Maciej K. and Doran, Peter T. "Sediment transport dynamics on an ice-covered lake: the 'floating' boulders of Lake Hoare, Antarctica" Antarctic Science, v.FirstVi, 2014, p.1-12. doi:doi:10.1017/S0954102014000558 

Rojas-Jimenez, K., C. Wurzbacher, E.C. Bourne, A. Chiuchiolo, J.C. Priscu and H-P. Grossart "Cryptomycota and Chytridiomycota dominate the fungal communities in ice-covered lakes of the McMurdo Dry Valleys, Antarctica." ISME Journal, v., 2016, p..

Kohler, Tyler J and KOPALOVÁ, KATE?INA and VAN DE VIJVER, BART and PATRICK KOCIOLEK, J. "The genus Luticola D.G.Mann (Bacillariophyta) from the McMurdo Sound Region, Antarctica, with the description of four new species" 2015, v.208, 2015, p.32. doi:10.11646/phytotaxa.208.2.1 

Sabacka, Marie; Priscu, John C.; Basagic, Hassan J.; Fountain, Andrew G.; Wall, Diana H.; Virginia, Ross A.; Greenwood, Mark C. "Aeolian flux of biotic and abiotic material in Taylor Valley, Antarctica" GEOMORPHOLOGY, v.155, 2012, p.102-111.

Mowlem, M.C. , M.-N. Tsaloglou, E.M.W., C.F.A. Floquet, K. Saw, L. Fowler, R. Brown, D. Pearce, J.B. Wyatt, A.D. Beaton, M.P. Brito, D.A. Hodgson, G. Griffiths, M. Bentley, D. Blake, H. Campbell, L. Capper, R. Clarke, C. Cockell, H. Corr, W. Harris, C. Hi "Probe Technology for the Direct Measurement and Sampling of Ellsworth Subglacial Lake. In Subglacial Antarctic Aquatic Environments" AGU Geophysical Monograph Series, v., 2011, p..

Bagshaw, E.A., Wadham, J.L. Tranter, M., Fountain, A.G., Dubnick, A., Fitzsimmons, S. "Processes controlling carbon cycling in Antarctic glacier surface ecosystems." Geochemical Perspectives Letters, v.2, 2016, p.44.

Grebmeier, J. and J.C. Priscu (co-chairs). "Frontiers in Understanding Climate Change and Polar Ecosystems: Summary of a Workshop." Committee on Frontiers in Understanding Climate Change and Polar Ecosystems Polar Research Board Division of Earth and Life Studies. NRC Press., v., 2011, p..

Wlostowski, Adam N. and Gooseff, Michael N. and McKnight, Diane M. and Jaros, Christopher and Lyons, W. Berry "Patterns of hydrologic connectivity in the McMurdo dry valleys, Antarctica: a synthesis of 20 years of hydrologic data" Hydrological Processes, v., 2016, p.n/a-n/a. doi:10.1002/hyp.10818 

Levy, J.S., Fountain, A.G., Gooseff, M.N., Barrett, J.E., Vantreese, R., Welch, K.A., Lyons, W.B., Nielsen, U.N. and Wall, D.H. "Water track modification of soil ecosystems in the Lake Hoare basin, Taylor Valley, Antarctica" Antarctic Science, v., 2013, p.. doi:10.1017/s095410201300045x 

Warrier, Rohit B. and Clara Castro, M. and Hall, Chris M. and Kenig, Fabien and Doran, Peter T. "Reconstructing the evolution of Lake Bonney, Antarctica using dissolved noble gases" Applied Geochemistry, v.58, 2015, p.46-61. doi:http://dx.doi.org/10.1016/j.apgeochem.2015.02.013 

Ball, B. A. and Tellez, C. R. and Virginia, R. A. "Penguin activity influences soil biogeochemistry and soil respiration in rookeries on Ross Island, Antarctica" Polar Biology, v.38, 2015, p.1357-1368. doi:10.1007/s00300-015-1699-7 

Fountain, A. G. and Levy, J. S. and Gooseff, M. N. and Van Horn, D. "The McMurdo Dry Valleys: A landscape on the threshold of change" Geomorphology, v.225, 2014, p.25-35. doi:DOI 10.1016/j.geomorph.2014.03.044 

Obryk, M.K., P.T. Doran, A.S. Friedlaender, M. Gooseff, J.C. Priscu, S.E Stammerjohn, D.K. Steinberg and H.W. Ducklow "Responses of Antarctic Marine and Freshwater Ecosystems to Changing Ice Conditions" BioScience, v.66, 2016, p.biosci/bi. doi:10.1093 

Bokhorst, S; Huiskes, A; Convey, P; Sinclair, BJ; Lebouvier, M; Van de Vijver, B; Wall, DH "Microclimate impacts of passive warming methods in Antarctica: implications for climate change studies" POLAR BIOLOGY, v.34, 2011, p.1421. doi:10.1007/s00300-011-0997-  View record at Web of Science

Doran, P. T. and Kenig, F. and Knoepfle, J. L. and Mikucki, J. A. and Lyons, W. B. "Radiocarbon distribution and the effect of legacy in lakes of the McMurdo Dry Valleys, Antarctica" Limnology and Oceanography, v.59, 2014, p.811-826. doi:DOI 10.4319/lo.2014.59.3.0811 

Adrian Howkins "Experiments in the Anthropocene: Climate Change and History in the McMurdo Dry Valleys, Antarctica" Environmental History, v., 2014, p.. doi:10.1093/envhis/emu004 

PATRICK KOCIOLEK, J. and Kopalova, K and Hamsher, S. E. and Tyler J. Kohler and Bart Van de Vijver and Convey, Peter and Diane M McKnight "Freshwater diatom biogeography and the genus Luticola: an extreme case of endemism in Antarctica" Polar Biology, v.40, 2017, p.1185-1196. doi:10.1007/s00300-017-2090-7 

Dowling, C. B. and Poreda, R. J. and Lyons, W. B. "The effects of high meltwater on the limnology of Lake Fryxell and Lake Hoare, Taylor Valley, Antarctica, as shown by dissolved gas, tritium and chlorofluorocarbons" Antarctic Science, v.26, 2014, p.331-340. doi:Doi 10.1017/S095410201300062x 

Knox, Matthew A. and Wall, Diana H. and Virginia, Ross A. and Vandegehuchte, Martijn L. and Gil, Inigo San and Adams, Byron J. "Impact of diurnal freeze?thaw cycles on the soil nematode Scottnema lindsayae in Taylor Valley, Antarctica" Polar Biology, v., 2015, p.1-10. doi:10.1007/s00300-015-1809-6 

Deuerling, K. M. and Lyons, W. B. and Welch, S. A. and Welch, K. A. "The characterization and role of aeolian deposition on water quality, McMurdo Dry Valleys, Antarctica" Aeolian Research, v.13, 2014, p.7-17. doi:DOI 10.1016/j.aeolia.2014.01.002 

Kohler, T. J. and Chatfield, E. and Gooseff, M. N. and Barrett, J. E. and McKnight, D. M. "Recovery of Antarctic stream epilithon from simulated scouring events" Antarctic Science, v.27, 2015, p.341-354. doi:10.1017/s0954102015000024 

Vick-Majors, T.J., Priscu, J.C. and Amaral-Zettler, L.A. "Modular community structure suggests metabolic plasticity during the transition to polar night in ice-covered Antarctic lakes" The ISME Journal, v., 2013, p.. doi:10.1038/ismej.2013.190 

Sakaeva, A. and Sokol, E. R. and Kohler, T. J. and Stanish, L. F. and Spaulding, S. A. and Howkins, A. and Welch, K. A. and Lyons, W. B. and Barrett, J. E. and McKnight, D. M. "Evidence for dispersal and habitat controls on pond diatom communities from the McMurdo Sound Region of Antarctica" Polar Biology, v., 2016, p.1-16. doi:10.1007/s00300-016-1901-6 

Dolhi, J. M., N. Ketchum, R.M. Morgan-Kiss "Establishment of Microbial Eukaryotic Enrichment Cultures from a Chemically Stratified Antarctic Lake and Assessment of Carbon Fixation Potential" Journal of Visualized Experiments, v.Not Set, 2012, p.Not Set. doi:10.3791/3992 

Leslie, D. and Lyons, W. B. and Warner, N. and Vengosh, A. and Olesik, J. and Welch, K. and Deuerling, K. "Boron isotopic geochemistry of the McMurdo Dry Valley lakes, Antarctica" Chemical Geology, v.386, 2014, p.152-164. doi:DOI 10.1016/j.chemgeo.2014.08.016 

Foreman, C.M., Cory, R.M., Morris, C.E., SanClements, M.D., Smith, H.J., Lisle, J.T., Miller, P.L., Chin, Y.-P. and McKnight, D.M. "Microbial growth under humic-free conditions in a supraglacial stream system on the Cotton Glacier, Antarctica" Environmental Research Letters, v., 2013, p.. doi:10.1088/1748-9326/8/3/035022 

McKnight, D. M. and Cozzetto, K. and Cullis, J. D. S. and Gooseff, M. N. and Jaros, C. and Koch, J. C. and Lyons, W. B. and Neupauer, R. and Wlostowski, A. "Potential for real-time understanding of coupled hydrologic and biogeochemical processes in stream ecosystems: Future integration of telemetered data with process models for glacial meltwater streams" Water Resources Research, v.51, 2015, p.6725-6738. doi:10.1002/2015wr017618 

G. W. Berger Peter T. Doran Thomsen, K.J. "Micro-hole and multigrain quartz luminescence dating of Paleodeltas at Lake Fryxell, McMurdo Dry Valleys (Antarctica), and relevance for lake history" Quaternary Geochronology, v., 2013, p.. doi:10.1016/j.quageo.2013.04.002 

Trista J. Vick-Majors and Mitchell, Andrew and Achberger, Amanda and Brent C. Christner and John E. Dore and Alexander B. Michaud and Jill A. Mikucki and Purcell, Alicia M. and Skidmore, Mark L. and Priscu, John C "Physiological Ecology of Microorganisms in Subglacial Lake Whillans" Frontiers in Microbiology, v.7, 2016, p.. doi:10.3389/fmicb.2016.01705 

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Obryk, M. K., Doran, P. T., Waddington, E. D., & Mckay, C. P. "The influence of föhn winds on Glacial Lake Washburn and palaeotemperatures in the McMurdo Dry Valleys, Antarctica, during the Last Glacial Maximum" Antarctic Science, v., 2017, p.1.

Khan, Alia L. and Wagner, Sasha and Jaff{\'e}, Rudolf and Xian, Peng and Williams, Mark and Armstrong, Richard and Diane M McKnight "Dissolved black carbon in the global cryosphere: Concentrations and chemical signatures" Geophysical Research Letters, v.44, 2017, p.6226-6234. doi:10.1002/2017GL073485 

Winslow, LA, Dugan, HA, Doran, PT, Priscu, JC, Vesbach, C, Buelow, H, Cronin, K. "Autonomous year-round sampling and sensing to explore the physical and biological habitability of permanently ice-covered Antarctic lakes" Marine Technology Society Journal, v., 2014, p.. doi:0025-3324 

Stanish, LF; Nemergut, DR; McKnight, DM "Hydrologic processes influence diatom community composition in Dry Valley streams" JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY, v.30, 2011, p.1057. doi:10.1899/11-008.  View record at Web of Science

Bisson, K. M. and Welch, K. A. and Welch, S. A. and Sheets, J. M. and Lyons, W. B. and Levy, J. S. and Fountain, A. G. "Patterns and processes of salt efflorescences in the McMurdo region, Antarctica" Arctic Antarctic and Alpine Research, v.47, 2015, p.407-425. doi:10.1657/aaar0014-024 

Magalhaes, Catarina; Stevens, Mark I.; Cary, S. Craig; Ball, Becky A.; Storey, Bryan C.; Wall, Diana H.; Tuerk, Roman; Ruprecht, Ulrike "At Limits of Life: Multidisciplinary Insights Reveal Environmental Constraints on Biotic Diversity in Continental Antarctica" PLOS ONE, v.7, 2012, p.1-5.

Velasco-Castrillon, Alejandro and McInnes, Sandra J. and Schultz, Mark B. and Arroniz-Crespo, Maria and D'Haese, Cyrille A. and Gibson, John A. E. and Adams, Byron J. and Page, Timothy J. and Austin, Andrew D. and Cooper, Steven J. B. and Stevens, Mark I. "Mitochondrial DNA analyses reveal widespread tardigrade diversity in Antarctica" Invertebrate Systematics, v.29, 2015, p.578-590. doi:10.1071/is14019 


Project Outcomes Report

Disclaimer

This Project Outcomes Report for the General Public is displayed verbatim as submitted by the Principal Investigator (PI) for this award. Any opinions, findings, and conclusions or recommendations expressed in this Report are those of the PI and do not necessarily reflect the views of the National Science Foundation; NSF has not approved or endorsed its content.

The McMurdo Dry Valleys (MDVs) represent the largest (4500 km2) ice-free area of Antarctica. The MDV landscape is a mosaic of glaciers, soil and exposed rock, and stream channels that connect glaciers to mostly closed-basin (no outflow), permanently ice-covered lakes. The climate is cold (mean annual air temperatures from -15 to -30C), and dry (~50 mm annual water equivalent as snow), yet life persists, and evolves in this polar desert ecosystem.  Lake water columns are liquid and biologically active year-round, but glacial meltwater streams flow and soils thaw only during the austral summer. The ecosystem is dominated by microorganisms, there are no vascular plants.  Microbial mats composed primarily of cyanobacteria are abundant in lakes and streams. Mat organisms are transported by wind onto glacier and lake ice surfaces where they melt into the ice and actively metabolize in liquid water pockets that form during the summer. The stream mats host many diatoms, with sparse numbers of invertebrates. Lakes provide a habitat for diverse plankton communities that are adapted to annual light-dark cycles and subzero temperatures. Soils are inhabited by diverse bacteria, nematodes, rotifers, and tardigrades, all of which are metabolically active during summer. The McMurdo LTER (MCM) began studying this cold desert ecosystem in 1993 and showed that its biological complexity is very closely linked to past and present climatic conditions.

 

The focus of our research on this project was how physical, chemical, and biological connections (i.e., connectivity) across the landscape would change as projected regional warming was expected to melt more ice, creating more streamflow, more wet soils, and higher lake levels. The MDVs are physically linked by wind (year-round) and by streamflow from glaciers to lakes during the austral summer. We continued to monitor several critical processes in the MDVs including meteorology (at 12 stations), streamflow (17 stream gauges), stream mat biomass and diversity, lake chemical, physical, and biological properties, soil communities, and glacial mass balance.  Our hypotheses followed from our observations of synchronous and uniform ecosystem response to the cooling period of 1987-2001, which dampened connectivity among landscape units. In the decade since the end of that cooling trend, streamflows and aeolian transport of material have increased, amplifying connectivity. Contrary to the predictions of some of our hypotheses, not all ecosystem responses to increased connectivity have been synchronous or monotonic.

We investigated the biological connectivity among MDV landscape units by determining the biodiversity, distribution, and functional roles of the microbial communities within the environment, and their responses to climate driven pulses and presses (warm/cold, long/short changes). Results showed that bacterial diversity is greatest in streams, followed by lakes and soils, indicating limited biological connectivity among habitats, despite clear physical connectivity. For example, during flood events the stream microbial mats are scoured from the streambed and the mat material is transported to the nearshore lake sediments. Regrowth of the stream mats occurs over several years. We also found significant biogeographic patterns that include a range of connectivity among organisms from very broadly dispersed organisms (e.g., nematodes) to fine-scale, stream by stream, habitat sorting in cyanobacteria and diatom communities. A hillslope wetting experiment was initiated to test whether soil biogeochemical cycling and biodiversity were positively impacted by the addition of water.  Our results suggest that the addition of water leads to more homogeneity of soil biological communities and does not enhance biogeochemical cycling (i.e., of nitrogen, carbon, and phosphorous).  In a new initiative for this long-term project, we included the expertise of an environmental historian to explore the connections between people and the MDVs.  In these efforts we went beyond the heroic age of exploration (early 1900s) to document and quantify the human activity in the MDVs which has increased from 1957 to present.

 

Our outreach and education activities leveraged the publication of our children’s book, “The Lost Seal”, with several curriculum guides, many classroom visits (both in-person and virtual), and museum presentations made.  The book was also translated into several different languages in an effort to reach more diverse audiences.  We also gave TEDX talks on the MDVs, and worked in the field with several artists and writers supported by the NSF to translate and amplify our science to the public.


Last Modified: 02/16/2018
Modified by: Michael N Gooseff

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