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Award Detail

Awardee:MARINE BIOLOGICAL LABORATORY, THE
Doing Business As Name:Marine Biological Laboratory
PD/PI:
  • Gaius R Shaver
  • (508) 548-3705
  • gshaver@lupine.mbl.edu
Co-PD(s)/co-PI(s):
  • Edward B Rastetter
  • William B Bowden
  • George W Kling
  • Phaedra Budy
Award Date:02/24/2011
Estimated Total Award Amount: $ 4,900,000
Funds Obligated to Date: $ 6,128,608
  • FY 2014=$1,960,000
  • FY 2011=$1,056,500
  • FY 2016=$997,000
  • FY 2015=$55,108
  • FY 2012=$2,060,000
Start Date:03/01/2011
End Date:02/28/2018
Transaction Type:Grant
Agency:NSF
Awarding Agency Code:4900
Funding Agency Code:4900
CFDA Number:47.074
Primary Program Source:040100 NSF RESEARCH & RELATED ACTIVIT
Award Title or Description:Arctic LTER: Climate Change and Changing Disturbance Regimes in Arctic Landscapes
Federal Award ID Number:1026843
DUNS ID:001933779
Program:LONG TERM ECOLOGICAL RESEARCH

Awardee Location

Street:7 M B L ST
City:WOODS HOLE
State:MA
ZIP:02543-1015
County:Woods Hole
Country:US
Awardee Cong. District:09

Primary Place of Performance

Organization Name:Marine Biological Laboratory
Street:7 M B L ST
City:WOODS HOLE
State:MA
ZIP:02543-1015
County:Woods Hole
Country:US
Cong. District:09

Abstract at Time of Award

This award supports the fifth phase of the Long Term Ecological Research Site (ARC LTER) at Toolik Lake, AK. The arctic region has warmed significantly over the past 30 years and arctic lands and freshwaters are already changing in response. The changes include a general "greening" of the arctic landscape, changes in species distributions and abundance, and changes in geophysical and biogeochemical processes and cycles at local and regional scales. Since 1975, the ARC LTER project and its predecessors have studied these changes by long-term monitoring of tundra and freshwater ecosystems in relation to climate change, by experimental manipulations of whole tundra, lake, and stream ecosystems, and by comparisons among climatically different sites in northern Alaska and throughout the Arctic. Increasingly, however, it is apparent that climatic warming in the Arctic is accompanied by dramatic changes in disturbance regime, including disturbances related to thawing of permafrost, a surprising increase in wildfire, and changes in the seasonality and synchrony of ecosystem processes. These disturbances, in addition to having major impacts on biogeochemistry, populations, and communities, also lead to major changes in surface energy balance, surface temperatures, water balance, and heat transfer into the permafrost that lies beneath the tundra, lakes, and streams. The result is much more dramatic and rapid change in biota and element cycles than is predicted in response to warming alone. In the long term, warming-related changes in disturbance regime may be more important than the direct effects of warming on arctic tundra and freshwater ecosystems, and on the entire Arctic. Over the next six years the ARC LTER project will address these issues in an integrated landscape framework, viewing the Arctic landscape as a spatially linked system including tundra, streams, and lakes and leading to long-term predictions of change at hillslope, watershed, and regional scales. The long-term goal, to develop a predictive understanding of the landscape of Northern Alaska including tundra, streams, lakes, and their interactions, remains the same but efforts for the next six years will include a new emphasis on changing disturbance regimes and their interactions with climate change. This refocusing will involve some shifts in effort, away from long-term experiments manipulating individual climatic, biotic, and biogeochemical drivers, and toward increased effort on characterizing disturbances including thermokarst, fire, and changing seasonality, and on new research focused on landscape linkages and physical disturbance. New areas of research will include changes in surface energy exchange and heat flux into permafrost, and a program on climate change impacts and responses by local Native Alaskan communities. The scientific impacts of this research are much broader than improvement of the ability to predict ecosystem structure, function, and change in Northern Alaska. The role of disturbance in long-term change is of broad theoretical and empirical interest in ecology and is closely related to controls on resilience, tipping points, and thresholds in populations, communities, ecosystems, and complex landscapes. The landscape near Toolik Lake, Alaska is an excellent model system for analysis of these issues at multiple spatial and temporal scales. Work at Toolik Lake will provide a multidimensional view of how responses of tundra and freshwater ecosystems to environmental change can feed back, both positively and negatively, on the factors driving the change. This is of broad importance both theoretically and from the perspective of global climatic change. A multifaceted education program will include: a Schoolyard project of lectures and inquiry in the largely Native Alaskan town of Barrow, Alaska; field courses in Arctic Ecology and in Polar Science for Journalists; and undergraduate and graduate research and degree programs. Research at the ARC LTER will benefit society as a case study of a landscape where local, subsistence land use is still common and important, and where climate change and its impacts are felt directly in the delivery of key ecosystem services.

Publications Produced as a Result of this Research

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Lang, S, Cornelissen, H; Shaver, G; Ahrens, M; Callaghan, T; Molau, U; ter Braak, C; Hölzer, A, and Aerts, R. "Arctic warming on two continents has consistent negative effects on lichen diversity and mixed effects on bryophyte diversity." Global Change Biology, v.18, 2012, p.1096-1107.

Rastetter, EB; Williams, M; Griffin, KL; Kwiatkowski, BL; Tomasky, G; Potosnak, MJ; Stoy, PC; Shaver, GR; Stieglitz, M; Hobbie, JE; Kling, GW "Processing arctic eddy-flux data using a simple carbon-exchange model embedded in the ensemble Kalman filter" ECOLOGICAL APPLICATIONS, v.20, 2010, p.1285. View record at Web of Science

Rastetter, Edward B. "Modeling for Understanding v. Modeling for Numbers" Ecosystems, v.20, 2017, p.. doi:10.1007/s10021-016-0067-y Citation details  

Jiang, Yueyang and Rastetter, Edward B. and Shaver, Gaius R. and Rocha, Adrian V. and Zhuang, Qianlai and Kwiatkowski, Bonnie L. "Modeling long-term changes in tundra carbon balance following wildfire, climate change, and potential nutrient addition" Ecological Applications, v.27, 2017, p.. doi:10.1002/eap.1413 Citation details  

Carey, Joanna C. and Parker, Thomas C. and Fetcher, Ned and Tang, Jianwu and Power, Sally "Biogenic silica accumulation varies across tussock tundra plant functional type" Functional Ecology, v.31, 2017, p.. doi:10.1111/1365-2435.12912 Citation details  

Parker, Thomas C. and Tang, Jianwu and Clark, Mahalia B. and Moody, Michael M. and Fetcher, Ned "Ecotypic differences in the phenology of the tundra species Eriophorum vaginatum reflect sites of origin" Ecology and Evolution, v.7, 2017, p.. doi:10.1002/ece3.3445 Citation details  

McLaren, Jennie R and Darrouzet-Nardi, Anthony and Weintraub, Michael N. and Gough, Laura "Seasonal patterns of soil nitrogen availability in moist acidic tundra" Arctic Science, v., 2017, p.. doi:10.1139/AS-2017-0014 Citation details  

McLaren, Jennie R. and Buckeridge, Kate M. and van de Weg, Martine J. and Shaver, Gaius R. and Schimel, Joshua P. and Gough, Laura "Shrub encroachment in Arctic tundra: Betula nana effects on above- and belowground litter decomposition" Ecology, v.98, 2017, p.. doi:10.1002/ecy.1790 Citation details  

Hobbie, John E. and Shaver, Gaius R. and Rastetter, Edward B. and Cherry, Jessica E. and Goetz, Scott J. and Guay, Kevin C. and Gould, William A. and Kling, George W. "Ecosystem responses to climate change at a Low Arctic and a High Arctic long-term research site" Ambio, v.46, 2017, p.. doi:10.1007/s13280-016-0870-x Citation details  

Koltz, Amanda M. and Asmus, Ashley and Gough, Laura and Pressler, Yamina and Moore, John C. "The detritus-based microbial-invertebrate food web contributes disproportionately to carbon and nitrogen cycling in the Arctic" Polar Biology, v., 2017, p.. doi:10.1007/s00300-017-2201-5 Citation details  

Cory, Rose M. and Kling, George W. "Interactions between sunlight and microorganisms influence dissolved organic matter degradation along the aquatic continuum: Interactions between sunlight and microorganisms" Limnology and Oceanography Letters, v.3, 2018, p.. doi:10.1002/lol2.10060 Citation details  

Wilcox, Kevin R. and Tredennick, Andrew T. and Koerner, Sally E. and Grman, Emily and Hallett, Lauren M. and Avolio, Meghan L. and La Pierre, Kimberly J. and Houseman, Gregory R. and Isbell, Forest and Johnson, David Samuel and Alatalo, Juha M. and Baldwi "Asynchrony among local communities stabilises ecosystem function of metacommunities" Ecology Letters, v.20, 2017, p.. doi:10.1111/ele.12861 Citation details  

Asmus, Ashley and Koltz, Amanda and McLaren, Jennie and Shaver, Gaius R. and Gough, Laura "Long-term nutrient addition alters arthropod community composition but does not increase total biomass or abundance" Oikos, v., 2017, p.. doi:10.1111/oik.04398 Citation details  

Vansomeren, Lindsay L. and Barboza, Perry S. and Gustine, David D. and Syndonia Bret-Harte, M. "Variation in ? 15 N and ? 13 C values of forages for Arctic caribou: effects of location, phenology and simulated digestion: Variation in ? 15 N and ? 13 C values of forages fo" Rapid Communications in Mass Spectrometry, v.31, 2017, p.. doi:10.1002/rcm.7849 Citation details  

Trusiak, Adrianna and Treibergs, Lija A. and Kling, George W. and Cory, Rose M. "The role of iron and reactive oxygen species in the production of CO 2 in arctic soil waters" Geochimica et Cosmochimica Acta, v.224, 2018, p.. doi:10.1016/j.gca.2017.12.022 Citation details  

Qiu, Chunjing and Zhu, Dan and Ciais, Philippe and Guenet, Bertrand and Krinner, Gerhard and Peng, Shushi and Aurela, Mika and Bernhofer, Christian and Brümmer, Christian and Bret-Harte, Syndonia and Chu, Housen and Chen, Jiquan and Desai, Ankur R. and Du "ORCHIDEE-PEAT (revision 4596), a model for northern peatland CO<sub>2</sub>, water, and energy fluxes on daily to annual scales" Geoscientific Model Development, v.11, 2018, p.. doi:10.5194/gmd-11-497-2018 Citation details  

Ward, Collin P. and Nalven, Sarah G. and Crump, Byron C. and Kling, George W. and Cory, Rose M. "Photochemical alteration of organic carbon draining permafrost soils shifts microbial metabolic pathways and stimulates respiration" Nature Communications, v.8, 2017, p.. doi:10.1038/s41467-017-00759-2 Citation details  

Klobucar, Stephen L. and Rodgers, Torrey W. and Budy, Phaedra "At the forefront: evidence of the applicability of using environmental DNA to quantify the abundance of fish populations in natural lentic waters with additional sampling considerations" Canadian Journal of Fisheries and Aquatic Sciences, v.74, 2017, p.. doi:10.1139/CJFAS-2017-0114 Citation details  

Liu, Yan and Wang, Zhuosen and Sun, Qingsong and Erb, Angela M. and Li, Zhan and Schaaf, Crystal B. and Zhang, Xiaoyang and Román, Miguel O. and Scott, Russell L. and Zhang, Quan and Novick, Kimberly A. and Syndonia Bret-Harte, M. and Petroy, Shelley and "Evaluation of the VIIRS BRDF, Albedo and NBAR products suite and an assessment of continuity with the long term MODIS record" Remote Sensing of Environment, v.201, 2017, p.. doi:10.1016/j.rse.2017.09.020 Citation details  

Daniels, William C. and Russell, James M. and Giblin, Anne E. and Welker, Jeffrey M. and Klein, Eric S. and Huang, Yongsong "Hydrogen isotope fractionation in leaf waxes in the Alaskan Arctic tundra" Geochimica et Cosmochimica Acta, v.213, 2017, p.. doi:10.1016/j.gca.2017.06.028 Citation details  

Boelman, Natalie T. and Krause, Jesse S. and Sweet, Shannan K. and Chmura, Helen E. and Perez, Jonathan H. and Gough, Laura and Wingfield, John C. "Extreme spring conditions in the Arctic delay spring phenology of long-distance migratory songbirds" Oecologia, v.185, 2017, p.. doi:10.1007/s00442-017-3907-3 Citation details  

Pavelsky, Tamlin M. and Zarnetske, Jay P. "Rapid decline in river icings detected in Arctic Alaska: Implications for a changing hydrologic cycle and river ecosystems: River Icing Declines in Arctic Alaska" Geophysical Research Letters, v.44, 2017, p.. doi:10.1002/2016GL072397 Citation details  

Euskirchen, Eugénie S. and Edgar, Colin W. and Syndonia Bret-Harte, M. and Kade, Anja and Zimov, Nikita and Zimov, Sergey "Interannual and Seasonal Patterns of Carbon Dioxide, Water, and Energy Fluxes From Ecotonal and Thermokarst-Impacted Ecosystems on Carbon-Rich Permafrost Soils in Northeastern Siberia: Siberian CO 2 , Water, and Energy Fluxes" Journal of Geophysical Research: Biogeosciences, v.122, 2017, p.. doi:10.1002/2017JG004070 Citation details  

Euskirchen, E. S. and Bret-Harte, M. S. and Shaver, G. R. and Edgar, C. W. and Romanovsky, V. E. "Long-Term Release of Carbon Dioxide from Arctic Tundra Ecosystems in Alaska" Ecosystems, v.20, 2017, p.. doi:10.1007/s10021-016-0085-9 Citation details  

Lynch, Laurel M. and Machmuller, Megan B. and Cotrufo, M. Francesca and Paul, Eldor A. and Wallenstein, Matthew D. "Tracking the fate of fresh carbon in the Arctic tundra: Will shrub expansion alter responses of soil organic matter to warming?" Soil Biology and Biochemistry, v.120, 2018, p.. doi:10.1016/j.soilbio.2018.02.002 Citation details  

H.N. Mbufong, M. Lund, M. Aurela, T.R. Christensen, W. Eugster, T. Friborg, B. U. Hansen, E.R. Humphreys, M. Jackowicz-Korczynski, L. Kutzbach, P.M. Lafleur, W.C. Oechel, F.J.W. Parmentier, D.P. Rasse, A.V. Rocha, T. Sachs, M.K. van der Molen, and M.P. Ta "Assessing the spatial variability in peak season CO2 exchange characteristics across the Arctic tundra using a light response curve parameterization" Biogeosciences, v.11, 2014, p.4897-4912. doi:10.5194/bg-11-4897-2014 

Gough, Laura; Moore, John C.; Shaver, Gauis R.; Simpson, Rodney T.; Johnson, David R. "Above- and belowground responses of arctic tundra ecosystems to altered soil nutrients and mammalian herbivory" ECOLOGY, v.93, 2012, p.1683-1694.

Chandler, J. L., J. B. McGraw, C. Bennington, G. R. Shaver, M. C. Vavrek, and N. Fetcher "Tiller population dynamics of reciprocally transplanted Eriophorum vaginatum L. ecotypes in a changing climate" Population Ecology, v., 2014, p.. doi:10.1007/s10144-014-0459-9 

McLaren, J.R., M.J. van de Weg, K.M. Buckeridge, G.R. Shaver, J.P. Schimel and L. Gough. "Shrub encroachment in Arctic tundra: Betula nana effects on above- and below-ground litter decomposition." Ecology, v.98, 2017, p.1361. doi:10.1139/AS-2017-0014 

Krause, J.S., H.E. Chmura, J.H. Perez, L.N. Quach, A. Asmus, K.R. Word, M.A. McGuigan, S.K. Sweet, S.L. Meddle, L. Gough, N. Boelman and J. Wingfield "Breeding on the leading edge of a northward range expansion: Differences in morphology and the stress response in the Arctic Gambel?s white-crowned sparrow" Oecologia, v.180, 2016, p.33.

Wolkovich, E.M., S. Allesina, K.L. Cottingham, J.C. Moore, S.A. Sandin, and C. de Mazancourt. "Linking the green and brown worlds: The prevalence and effect of multi-channel omnivory in food webs" Ecology, v.96, 2015, p.3376.

Merck, M. F. and B.T. Neilson. "Modelling in-pool temperature variability in a beaded arctic stream." Hydrological Processes, v.26, 2012, p.3921?3933. doi:doi: 10.1002/hyp.8419 

Bennington, Cynthia C.; Fetcher, Ned; Vavrek, Milan C.; Shaver, Gaius R.; Cummings, Kelli J.; McGraw, James B. "Home site advantage in two long-lived arctic plant species: results from two 30-year reciprocal transplant studies" JOURNAL OF ECOLOGY, v.100, 2012, p.841-851.

Ward, C.P., R.L. Sleighter, P.G. Hatcher, R. M. Cory "Insights into the complete and partial photooxidation of black carbon in surface waters" Environmental Science Process Impacts, v.16, 2014, p.721-731. doi:10.1039/c3em00597f 

Gersony, J.T., Prager, C.M., Boelman, N.T., Eitel, J.U.H., Gough, L., Greaves, H.E., Griffin, K.L., Magney, T.S., Sweet, S.K., Vierling, L.A., and Naeem, S. ( "Scaling thermal properties from the leaf to the canopy in the Alaskan arctic tundra." Arctic, Antarctic, and Alpine Research, v.48, 2016, p.745.

Keller, K., J. D. Blum, and G. W. Kling "Stream geochemistry as an indicator of increasing thaw depth in an arctic watershed." Chemical Geology, v.273, 2010, p.76.

Ichii, K., Ueyama, M., Kondo, M., Saigusa, N., Kim, J., Ma, C.A., Euskirchen, E.S., Kang, M., Hirano, T., Joiner, J., Kobayashi, H., Marchesini, L.B., Merbold, L., Saitoh, T.M., Takagi, K., Varlagin, A., Bret-Harte, M.S., Kitamura, K., Kosugi, Y., Kotani, "New data-driven estimation of terrestrial CO2 fluxes in Asia using an integrated database of eddy covariance measurements, remote sensing data, and support vector regression." Journal of Geophysical Research - Biogeosciences,, v.122, 2017, p.767. doi:10.1002/2016JG003640. 

Pearce, A.R., E.B. Rastetter, B.L. Kwiatkowski, W.B. Bowden, M.C. Mack and Y. Jiang "Recovery of arctic tundra from thermal erosion disturbance is constrained by nutrient accumulation: a modeling analysis" Ecological Applications, v.Preprin, 2014, p..

Krause, J.S., Perez, J.H., Chmura, H.E., Asmus, A., Sweet, S.K., Meddle, S.L., Hunt, K.E., Gough, L., Boelman, N.T., and Wingfield, J.C. (submitted) The effects of an extreme spring on body condition and stress physiology in Lapland longspurs and white-cr "The effects of an extreme spring on body condition and stress physiology in Lapland longspurs and white-crowned sparrows breeding in the Arctic," General and Comparative Endocrinology, v.237, 2016, p.10.

Rueda, FJ; MacIntyre, S "Modelling the fate and transport of negatively buoyant storm-river water in small multi-basin lakes" ENVIRONMENTAL MODELLING & SOFTWARE, v.25, 2010, p.146. doi:10.1016/j.envsoft.2009.07.00  View record at Web of Science

Merck, M. F., B.T. Neilson, R. Cory, G.W. Kling. "Variability of Instream and Riparian Storage in a Beaded Arctic Stream." Hydrological Processes, v.26, 2012, p.2938-2950. doi:doi:10.1002/hyp.8323 

McGraw, J. B., J. B. Turner, J. L. Chandler, and M. C. Vavrek "Disturbances as Hot Spots of Ecotypic Variation: A Case Study with Dryas octopetala" Arctic, Antarctic, and Alpine Research, v.46, 2014, p.542-547. doi:10.1657/1938-4246-46.3.542 

Daniels, W.C., Kling, G.W., and Giblin, A.E. "Benthic community metabolism in deep and shallow Arctic lakes during 13 years of whole?lake fertilization" Limnology and Oceanography, v.60, 2015, p.1604.

Longo, W.M., S. Theroux, A.E. Giblin, Y. Zheng, J.T. Dillon, Yongong Huang. "Temperature calibration and phylogenetically distinct distributions for freshwater alkenones: Evidence from northern Alaskan lakes." Geocosmochima Cosmochima Acta., v.180, 2016, p.177.

Jiang, Y, EB Rastetter, GR Shaver, AVRocha, Q Zhuang, and BL Kwiatkowski. "Modeling long-term changes in tundra carbon balance following wildfire, climate change, and potential nutrient addition." Ecological Applications, v.27, 2017, p.105. doi:10.1002/eap.1413 

Gough, Laura; Gross, Katherine L.; Cleland, Elsa E.; Clark, Christopher M.; Collins, Scott L.; Fargione, Joseph E.; Pennings, Steven C.; Suding, Katharine N. "Incorporating clonal growth form clarifies the role of plant height in response to nitrogen addition" OECOLOGIA, v.169, 2012, p.1053-1062.

Wyant, KA; Draney, ML; Moore, JC "Epigeal Spider (Araneae) Communities in Moist Acidic and Dry Heath Tundra at Toolik Lake, Alaska" ARCTIC ANTARCTIC AND ALPINE RESEARCH, v.43, 2011, p.301. doi:10.1657/1938-4246-43.2.30  View record at Web of Science

Norman, B. C., Whiles, M. R., Collins, S. M., Flecker, A. S., Hamilton, S. K., Johnson, S. L., Rosi-Marshall, E. J., Ashkenas, L. R., Bowden, W. B., Crenshaw, C. L., Crowl, T., Dodds, W. K., Hall, R. O., El-Sabaawi, R., Griffiths, N. A., Marti, E., McDowe "Drivers of nitrogen transfer in stream food webs across continents. 2017." Ecology, v.98, 2017, p.3044. doi:10.1002/ecy.2009. 

O?Brien, W.J., and C. Luecke. "Zooplankton community structure in arctic ponds: shifts related to pond size." Arctic, v.64, 2012, p.483-487.

Souther, S., N. Fetcher, Z. Fowler, G. R. Shaver, and J. B. McGraw "Ecotypic differentiation in photosynthesis and growth of Eriophorum vaginatum along a latitudinal gradient in the Arctic tundra" Botany, v.92, 2014, p.551-561. doi:10.1139/cjb-2013-0320 

Magney, T.S., Eitel, J.U.H., Griffin, K.L., Boelman, N.T., Greaves, H.E., Prager, C.M., Logan, B.A., Zheng, G., Ma, L., Fortin, E.A., Oliver, R.Y., and Vierling, L.A "LiDAR canopy radiation model reveals patterns of photosynthetic partitioning in an arctic shrub." Agricultural and Forest Meteorology,, v.221, 2016, p..

O?Sullivan OS, OK Atkin, MA Heskel, PB Reich, MG Tjoelker, KWLK Weerasinghe, A Penillard, JJG Egerton, KJ Bloomfield, D Creek, NHA Bahar, KL Griffin, V Hurry, P Meir, and MH Turnbull "Thermal limits of leaf metabolism across biomes" Global change biology, v.23, 2017, p.209.

Connelly, T. L., McClelland, J. W., Crump, B. C., Kellogg, C. T. E., and K. H. Dunton "Seasonal changes in quantity and composition of suspended particulate organic matter in lagoons of the Alaskan Beaufort Sea." Marine Ecology Progress Series, v.527, 2015, p.31.

Potosnak, M.J., L. Lestrougeon, O. Nunez "Increasing leaf temperature reduces the suppression of isoprene emission by elevated CO2 concentration" Science of the Total Environment, v.481, 2014, p.352-359.

Kushida, K., S. Hobara, S. Tsuyuzaki, Y. Kim, M. Watanabe, Y. Setiawan, K. Harada, G. R. Shaver, and M. Fukuda "Spectral indices for remote sensing of phytomass, deciduous shrubs, and productivity in Alaskan arctic tundra" International Journal of Remote Sensing, v.36, 2015, p.4344.

Atkin, OK, KJ Bloomfield, PB Reich, MG Tjoelker, GP Asner, D Bonal, G Bönisch, M Bradford, LA Cernusak, EG Cosio, D Creek, KY Crous, T Domingues, JS Dukes, JJG Egerton, JR Evans, GD Farquhar, NM Fyllas, PPG Gauthier, E Gloor, TE Gimeno, KL Griffin, R Guer "Global variability in leaf respiration in relation to climate, plant functional types, and leaf traits." New Phytologist, v.206, 2015, p.614. doi:DOI: 10.1111/nph.13253 

Gough, Laura, Neil D. Bettez, Karie A. Slavik, William B. Bowden, Anne E. Giblin, George W. Kling, James A. Laundre, Gaius R. Shaver. "Effects of Long-Term Nutrient Additions on Arctic Tundra, Stream, and Lake Ecosystems: Beyond NPP." Oecologia, v.182, 2016, p.653.

Griffin, K.L., Epstein, D.J., Boelman, N.T. "Maximum photosynthetic electron transport decreases down slope in a small Arctic watershed" Arctic, Antarctic and Alpine Research, v.45, 2013, p.39. doi:http://dx.doi.org/10.1657/1938-4246-45.1.39 

Page, S.E. J. R. Logan, R. M. Cory, K. McNeill "Evidence for dissolved organic matter as the primary source and sink of photochemically produced hydroxyl radical in arctic surface waters" Environ. Sci.: Processes Impacts, v.16, 2014, p.807-822. doi:10.1039/c3em00596h 

Peterson, CA, N. Fetcher, JB McGraw, and CC Bennington. "Clinal variation in stomatal characteristicsof an arctic sedge, Eriophorum vaginatum (Cyperaceae)." American Journal of Botany, v.99, 2012, p.1-10.

Bret-Harte, M.S., M.C. Mack, G.R. Shaver, J.B. Reiskind, C.A. Mojica and M.C. Pizano "The response of Arctic vegetation and soils following the Anaktuvuk River Fire of 2007" Philosophpical Transactions of the Royal Society B, v.368, 2013, p.1624.

Ackerman, D. A., and A. L. Breen "Infrastructure development accelerates range expansion of trembling aspen (Populus tremuloides, Salicaceae) into the Arctic." Arctic, v., 2016, p.. doi:http://dx.doi.org/10.14430/arctic4560 

Parker TC, J Tang, MB Clark, MM Moody, and N Fetcher. "Ecotypic differences in the phenology of the tundra species Eriophorum vaginatum reflect sites of origin." Ecol Evol., v.7, 2017, p.9775. doi:10.1002/ece3.3445 

Laurion, I; Vincent, WF; MacIntyre, S; Retamal, L; Dupont, C; Francus, P; Pienitz, R "Variability in greenhouse gas emissions from permafrost thaw ponds" LIMNOLOGY AND OCEANOGRAPHY, v.55, 2010, p.115. View record at Web of Science

Page, S. E., G. W. Kling, M. Sander, K. H. Harrold, R. Logan, K. McNeill, R.M. Cory "Dark formation of hydroxyl radical in arctic soil and surface waters" Environmental Science and Technology, v.47, 2013, p.12860-128.

Jones, B., A. Breen, B. Gaglioti, D. Mann, A.V. Rocha, G. Grosse, C. Arp, M. Kunz, and D. Walker "Identification of unrecognized tundra fire events on the North Slope of Alaska" JGR-Biogeosciences, v.118, 2013, p.1334-1344.

Euskirchen, S.E., Bret-Harte, M.S., Shaver, G.R., Edgar, C.W., and V.E. Romanovsky. "Long-term release of carbon dioxide from arctic tundra ecosystems in Alaska." Ecosystems, v.20, 2017, p.960. doi:10.1007/s10021-016-0085-9 

Magney, T.S., Logan, B.A., Reblin, J., Boelman, N.T., Eitel, J.U.H., Greaves, H.E., Griffin, K.L., Prager, C.M., Vierling, L.A. "Xanthophyll cycle activity in two prominent Arctic shrub species" Arctic, Antarctic, and Alpine Research, v.49, 2017, p.277.

Kranabetter, J, K McLauchlan, S Enders, J Fraterrigo, P Higuera, J Morris, E Rastetter, R Barnes, B Buma, D Gavin, L Gerhart, L Gillson, P Hietz, M Mack, B McNeil, and S Perakis. "A framework to assess biogeochemical response to ecosystem disturbance using nutrient partitioning ratios." Ecosystems, v.19, 2016, p.387.

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Rastetter, EB, and JJ Vallino "Ecosystem's 80th and the Reemergence of Emergence." Ecosystems, v.18, 2015, p.735. doi:DOI 10.1007/s10021-015-9893-6 

Heskel, M., H. Greaves, A. Kornfeld, L. Gough, O.K. Atkin, M.H. Turnbull, G. Shaver, and K.L. Griffin. "Differential physiological responses to environmental change promote woody shrub expansion." Ecology and Evolution, v.xx, 2013, p.xx. doi:DOI: 10.1002/ece3.525 

Jiang, Y., A. V. Rocha, J. A. O?Donnell, J. A. Drysdale, E. B. Rastetter, G. R. Shaver, and Q. Zhuang. "Contrasting soil thermal responses to fire in Alaskan tundra and boreal forest" Journal of Geophysical Research-Earth Surface, v., 2015, p.. doi:DOI: 10.1002/2014JF003180 

Koltz, A.M., A. Asmus, L. Gough, Y. Pressler and John C. Moore. . "The detritus-based microbial-invertebrate food web contributes disproportionately to carbon and nitrogen cycling in the Arctic" Polar Biology, v., 2017, p.. doi:10.1007/s00300-017-2201-5 

Boelman, N.T., Magney, T.S., Prager, C., Griffin, K.L., Eitel, J.U.H., Greaves, H.E., and Vierling, L.A. "Spectral determination of concentrations of functionally diverse pigments in increasingly complex arctic tundra canopies" Oecologia, v., 2016, p.. doi:doi:10.1007/s00442-016-3646-x. 

Heskel, M., H. Greaves, A. Kornfeld, L. Gough, O.K. Atkin, M.H. Turnbull, G.R. Shaver and K.L. Griffin "Differential physiological responses to environmental change promote woody shrub expansion" Ecology and Evolution, v., 2013, p.. doi:10.1002/ece3.525 

Boelman, NT; Gough, L; McLaren, JR; Greaves, H "Does NDVI reflect variation in the structural attributes associated with increasing shrub dominance in arctic tundra?" ENVIRONMENTAL RESEARCH LETTERS, v.6, 2011, p.. doi:10.1088/1748-9326/6/3/03550  View record at Web of Science

Deslippe, Julie R.; Hartmann, Martin; Simard, Suzanne W.; Mohn, William W. "Long-term warming alters the composition of Arctic soil microbial communities" FEMS MICROBIOLOGY ECOLOGY, v.82, 2012, p.303-315.

Sweet, S., Griffin, K.L., Steltzer, H., Gough, L., Boelman, N.T. "Greater deciduous shrub abundance extends the annual period of maximum tundra greenness and increases modeled net CO2 uptake" Global Change Biology, v., 2015, p.. doi:doi: 10.1111/gcb.12852 

Adams, H. E., B. C. Crump and G. W. Kling "Temperature controls on aquatic bacterial activity and community dynamics." Environmental Microbiology, v.12, 2010, p.1319.

Kornfeld, A., Heskel, M., Atkin, O.K., Gough, L., Griffin, K.L., Horton, T.W., Turnbull, M.H. "Respiratory flexibility and efficiency are affected by simulated global change in Arctic plants" New Phytologist, v.197, 2013, p.1161-1172.

Crump, B. C., L. A. Amaral-Zettler, and G. W. Kling. "Microbial diversity in arctic freshwaters is structured by inoculation of microbes from soils." The ISME Journal, v.6, 2012, p.1629?1639. doi:doi:10.1038/ismej.2012.9 

Carey, Joanna C., Jianwu Tang, Pamela H. Templer, Kevin D. Kroeger, Thomas W. Crowther, Andrew Burton, Jeffrey S. Dukes, Bridget Emmett, Serita Frey, Mary Heskel, Lifen Jiang, Megan Machmuller, Jacqueline E. Mohan, Anne Marie Panetta, Peter B. Reich, Sabi "Temperature response of soil respiration largely unaltered with experimental warming" Proceedings National Academy of Sciences, v., 2016, p.. doi:dx.doi.org/10.5066/F7MK6B1X 

Cory, RM, BC Crump, JA Dobkowski and GW Kling "Surface exposure to sunlight stimulates CO2 release from permafrost soil carbon in the Arctic" ,PNAS February 26, 2013 vol. 110 no. 9 3429-3434, v.110, 2013, p.3429-3434. doi:doi: 10.1073/pnas.1214104110 

Harris, C. M., J. W. McClelland, T. L. Connelly, B. C. Crump, and K. H. Dunton. "Salinity and Temperature Regimes in Eastern Alaskan Beaufort Sea Lagoons in Relation to Source Water Contributions. Estuaries and Coasts 40:40-62. DOI: 10.1007/s12237-016-0123-z" Estuaries and Coasts, v.40, 2017, p.40. doi:10.1007/s12237-016-0123-z 

Genet, H., Oberbauer, S.F., Colby, S.J., Staudhammer, C.L., Starr, G. "Growth responses of Sphagnum hollows to a growing season lengthening manipulation in Alaskan Arctic tundra" Polar Biology, v.36, 2013, p.41.

Budy, P. and C. Luecke "Understanding how lake populations of arctic char are structured and function with special consideration of the potential effects of climate change: a multi-faceted approach" Oecologia, v.176, 2014, p.81-94. doi:10.1007/s00442-014-2993-8 

Cahoon, Sean M. P.; Sullivan, Patrick F.; Shaver, Gaius R.; Welker, Jeffrey M.; Post, Eric "Interactions among shrub cover and the soil microclimate may determine future Arctic carbon budgets" ECOLOGY LETTERS, v.15, 2012, p.1415-1422.

Boelman, N.T., Wingfield, J.C., Gough, L., Krause, J.S., Sweet, S.K., Chmura, H.E., and Perez, J.H. "Extreme spring conditions in the Arctic delay spring phenology of long-distance migratory songbirds" Oecologia, v.185, 2017, p.69.

Cory, R.M., Crump, B.C., Dobkowski, J.A., Kling, G.W. "Surface exposure to sunlight stimulates CO2 release from permafrost soil carbon in the Arctic" Proceedings of the National Academy of Sciences, v.110, 2013, p.3429.

Boelman, N.T., Holbrook, J., Krause, J.S., Greaves, H.E., Chmura, H.E., Perez, J.H., Magney, T.S., Eitel, J.U.H., Wingfield, J.C., Gough, L., Vierling, K.T. and Vierling, L.A. "Airborne laser scanning and spectral remote sensing give a bird's eye perspective on arctic tundra breeding habitat at multiple spatial scales" Remote Sensing of Environment, v.184, 2016, p.337. doi:10.1016/j.rse.2016.07.012 

Conant, RT; Ryan, MG; Agren, GI; Birge, HE; Davidson, EA; Eliasson, PE; Evans, SE; Frey, SD; Giardina, CP; Hopkins, FM; Hyvonen, R; Kirschbaum, MUF; Lavallee, JM; Leifeld, J; Parton, WJ; Steinweg, JM; Wallenstein, MD; Wetterstedt, JAM; Bradford, MA "Temperature and soil organic matter decomposition rates - synthesis of current knowledge and a way forward" GLOBAL CHANGE BIOLOGY, v.17, 2011, p.3392. doi:10.1111/j.1365-2486.2011.02496.  View record at Web of Science

Jiang, Y., Rastetter, E.B., Rocha, A.V., Pearce, A.R., Kwiatkowski, B.L., Shaver, G.R. "Carbon-Nutrient interactions during the early recovery of tundra after fire" Ecological Applications, v.25, 2015, p.1640.

Ueyma, M., Iwata, H., Harazono, Y., Euskirchen, E.S., Oechel, W.C., Zona, D. "Growing season and spatial variations of carbon fluxes of Arctic and boreal ecosystems in Alaska (USA)" Ecological Applications, v.23, 2013, p.1798-1816.

Euskirchen, E.S., Edgar, C.W., Bret-Harte, M.S., Kade, A., Zimov, N., Zimov, S. "Interannual and seasonal patterns of carbon dioxide, water, and energy fluxes from ecotonal and thermokarst-impacted ecosystems on carbon-rich permafrost soils in northeastern Siberia." Journal of Geophysical Research-Biogeosciences, v.122, 2017, p.2651. doi:10.1002/2017JG004070 

Jiang, Y., E. B. Rastetter, .R. Shaver, A.V. Rocha, Q. Zhuang, B. L. Kwiatkowski. "Long-term changes in tundra C balance following wildfire and climate change." Ecological Applications, v., 2016, p.. doi:DOI: 10.1002/eap.1413 

Liu, X, K Koba, L Koyama, S Hobbie, M Weiss, Y Inagaki, G Shaver, A giblin, S Hobara, K Nadelhoffer, M Sommerkorn, E Rastetter, G Kling, J Laundre, Y Yano, A Makabe, M Yano, C Liu. "Nitrate is an important nitrogen source for arctic tundra plants." Proceedings National Academy of Science, v., 2018, p.. doi:10.1073/PNAS.1715382115 

Euskirchen, E.S., M.S Bret-Harte, G.J. Scott, and G.R.Shaver "Seasonal patterns of carbon and water fluxes in three representative ecosystems in the northern foothills of the Brooks Range, Alaska" Ecosphere, v.3, 2012, p.4. doi:http://dx.doi.org/10.1890/ES11-00202.1 

De Baets, S., Lewis, R., Steinberg, N., van de Weg, M. J. , Meersmans, J., Quine, T.A., Shaver, G.R., Hartley, I.P. "Fire, nutrient and temperature sensitivity of soil organic carbon decomposition in permafrost." Soil Biology and Biochemistry, v.99, 2016, p.108.

Johnson, C., and C. Luecke. "Copepod dominance contributes to phytoplankton nitrogen deficiency in lakes during periods of low precipitation." J. Plankton Res., v.34, 2012, p.345-355.

Elmendorf, Sarah C et al. "Plot-scale evidence of tundra vegetation changeand links to recent summer warming." Nature Climate Change doi:10.1038/nclimate1465, v.2, 2012, p.453?457. doi:doi:10.1038/nclimate1465 

O'Brien, W.J. and C. Luecke "Zooplankton community structure in arctic ponds: shifts related to pond size." Arctic, v.64, 2011, p.483.

Xu, L., R. B. Myneni, F. S. Chapin III, T. V. Callaghan, J. E. Pinzon, C. J. Tucker, Z. Zhu, J. Bi, P. Ciais, H. Tømmervik, E. S. Euskirchen, B. C. Forbes, S. L. Piao, B. T. Anderson, S. Ganguly, R. R. Nemani, S. J. Goetz, P. S. A. Beck, A. G. Bunn, C. Ca "Temperature and vegetation seasonality diminishment over northern lands" Nature Climate Change, v.3, 2013, p.581-586. doi:10.1038/nclimate1836 

Eugster, W. and G. W. Kling "Performance of a low-cost methane sensor for ambient concentration measurements in preliminary studies." Atmospheric Measurement Techniques, v.5, 2012, p.1925?1934. doi:doi:10.5194/amt-5-1925-2012 

Boelman, N.T., Holbrook, H.E., Krause, J., Magney, T., Perez, J., Eitel, J.U.H., Gough, L., Vierling, K.T., Wingfield, J., and Vierling, L.A. "LiDAR gives a bird?s eye perspective on arctic tundra breeding habitat at multiple spatial scales." Remote Sensing of Environment,, v.184, 2016, p.337.

Gough, L., H. Bass and J.R. McLaren "Effects of increased soil nutrients on seed rain: a role for seed dispersal in the Greening of the Arctic?" Arctic, Antarctic, and Alpine Research, v.47, 2015, p.27.

Hobbie, J. E., and E. A. Hobbie. "Amino acid cycling in plankton and soil microbes studied with radioisotopes: measured amino acids in soil do not reflect bioavailability." Biogeochemistry, v.107, 2012, p.339. doi:10.1007/s10533-010-9556-9 

Hobbie, EA, J Shamhart, M Sheriff, AP Ouimette, M Trappe, EAG Schuur, JE Hobbie, R Boonstra, and BM Barnes. "Stable Isotopes and Radiocarbon Assess Variable Importance of Plants and Fungi in Diets of Arctic Ground Squirrels." Arctic, Antarctic, and Alpine Research 10.1657/AAAR0016-062, v.49, 2017, p.487. doi:10.1657/AAAR0016-062 

Asmus, A., A. Koltz, J.R. McLaren, G.R. Shaver, and L. Gough. "Long-term nutrient addition alters arthropod community structure and seasonality in arctic tundra." Oikos, v.127, 2018, p.460.

Johnson, D.R. and L. Gough "Two arctic tundra graminoids differ in tolerance to herbivory when grown with added soil nutrients" Botany, v.91, 2013, p.82-90.

Hobbie, J.E., G.R. Shaver, E.B. Rastetter, J.E. Cherry, S.J. Goetz, K.C. Guay, W.A. Gould, G.W. Kling. "Multiple ecosystem responses to climate change at a long-term research site in Arctic Alaska." Ambio, v.46, 2017, p.S160.

Cory, R.M., C. P. Ward, B. C. Crump, G. W. Kling "Sunlight controls water column processing of carbon in arctic freshwaters" Science, v.345, 2014, p.925-928. doi:10.1126/science.1253119 

Sweet, S., Asmus, A., Rich, M.E., Gough, L., Boelman, N.T. "NDVI as a predictor of canopy arthropod biomass in the Alaskan arctic tundra" Ecological Applications, v.25, 2015, p.779.

Liu, Y., Wang, Z., Sun, Q., Erb, A.M., Li, Z., Schaaf, C.B., Zhang, X., Román, M.O., Scott, R.L., Zhang, Q., Novick, K.A., Bret-Harte, M.S., Petroy, S., SanClements, M. "Evaluation of the VIIRS BRDF, Albedo, and NBAR products and an assessment of continuity with the long term MODIS record." Remote Sensing of Environment, v.201, 2017, p.256. doi:10.1016/j.rse.2017.09.020 

McGraw, J. B., J. B. Turner, S. Souther, C. C. Bennington, M. C. Vavrek, G. R.Shaver, and N. Fetcher. "Northward displacement of optimal climate conditions for ecotypes of Eriophorum vaginatum L. across a latitudinal gradient in Alaska. Global Change Biology" Global Change Biology, v.21, 2015, p.3827. doi:doi: 10.1111/gcb.12991 

Rich, M.E., L. Gough and N.T. Boelman "Arctic arthropod assemblages in habitats of differing shrub dominance" Ecography, v.36, 2013, p.994-1003. doi:10.1111/j.1600-0587.2012.00078.x 

DeMarco, J., M.C. Mack, M.S. Bret-Harte, M. Burton and G.R. Shaver "Long-term experimental warming and nutrient additions increase productivity in tall deciduous shrub tundra" Ecosphere, v.5, 2014, p.Article 7.

Loranty, MM; Goetz, SJ; Rastetter, EB; Rocha, AV; Shaver, GR; Humphreys, ER; Lafleur, PM "Scaling an Instantaneous Model of Tundra NEE to the Arctic Landscape" ECOSYSTEMS, v.14, 2011, p.76. doi:10.1007/s10021-010-9396-  View record at Web of Science

Adams, H.E., Crump, B.C., Kling, G.W. "Isolating the effects of storm events on arctic aquatic bacteria: temperature, nutrients, and community composition as controls on bacterial productivity" Frontiers in Aquatic Microbial Ecology, v., 2015, p.. doi:doi: 10.3389/fmicb.2015.00250 

Adams, H. E., B. C. Crump, and G. W. Kling "Metacommunity dynamics of bacteria in an arctic lake: the impact of species sorting and mass effects on bacterial production and biogeography" Frontiers in Microbiology, v.5, 2014, p.. doi:10.3389/fmicb.2014.00082 

Johnson, D.R., M.J. Lara, G.R. Shaver, G.O. Batzli, J.D. Shaw and C.E. Tweedie.Johnson, DR, MJ Lara, GR Shaver, GO Batzli, JD Shaw and CE Tweedie. "Exclusion of brown lemmings reduces vascular plant cover and biomass in arctic coastal tundra: resampling of a 50+ year herbivore exclosure experiment near Barrow, Alaska" Environmental Research Letters, v.6, 2011, p.045507.

Dillon, J. T., Longo, W. M., Zhang, Y., Torozo, R., & Huang, Y. "Identification of double-bond positions in isomeric alkenones from a lacustrine haptophyte." Rapid Communications in Mass Spectrometry,, v.30, 2016, p.112.

Rahm, J., and J.C. Moore. "A case study of long-term engagement and hybrid positioning: Insights into the STEM pathways of underrepresented youth." Journal of Research in Science Teaching, v., 2015, p.2015. doi:doi: 10.1002/tea.21268 

Sleighter, R.L., R. M. Cory, L. A. Kaplan, H. A.N. Abdulla, P. G. Hatcher "A Coupled geochemical and biogeochemical approach to characterize bio-reactivity of dissolved organic matter from a headwater stream" Journal of Geophysical Research: Biogeosciences, v.119, 2014, p.1520-1537. doi:10.1002/2013JG002600 

Rastetter, EB "Modeling coupled biogeochemical cycles" FRONTIERS IN ECOLOGY AND THE ENVIRONMENT, v.9, 2011, p.68. doi:10.1890/09022  View record at Web of Science

Moore, J.C., R. Boone, A. Koyama, and K. Holfelder "Enzymatic and detrital influences on the structure, function, and dynamics of spatially-explicit model ecosystems" Biogeochemistry, v.117, 2013, p.205-227. doi:10.1007/s10533-013-9932-3 

Fetcher N., S.J. Agosta, J.C. Moore, J.A. Stratford, and M.A. Steele. "Evidence of compartmentalization of energy flow based on C3 and C4 pathways in a reclaimed ecosystem." Restoration Ecology, v., 2015, p.. doi:doi: 10.1111/rec.12202. 

Pizano, C., A.F. Baron, E.A.G. Schuur, K.G. Crummer, and M.C. Mack "Effects of thermo-erosional disturbance on surface soil carbon and nitrogen dynamics in upland arctic tundra" Environmental Research Letters, v.9, 2014, p.. doi:doi:10.1088/1748-9326/9/7/075006 

Euskirchen, E.S., M.S Bret-Harte, G.J. Scott, C. Edgar, and G.R. Shaver. "Seasonal patterns of carbon and water fluxes in three representative ecosystems in the northern foothills of the Brooks Range, Alaska." Ecosphere 3(1):4., v.3, 2012, p.4. doi:http://dx.doi.org/10.1890/ES11-00202.1 


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.

Intellectual Merit:  The arctic region has warmed significantly over the past 40 years and arctic lands and freshwaters are already changing in response.  The changes include a general “greening” of the arctic landscape, changes in species distributions and abundance, and changes in geophysical and biogeochemical processes and cycles at local and regional scales.  Since 1975, this project and its predecessors have studied these changes by long-term monitoring of tundra and freshwater ecosystems in relation to climate changes, by experimental manipulations of whole tundra, lake, and stream ecosystems, and by comparisons among climatically different sites in northern Alaska and throughout the Arctic.  Increasingly, however, it is apparent that Arctic climate warming is accompanied by dramatic changes in disturbance regime, including the thawing of permafrost, a surprising increase in wildfire, and changes in the seasonality and synchrony of ecosystem processes.  These disturbances, in addition to having major impacts on biogeochemistry, populations, and communities, also lead to major changes in surface energy balance, surface temperatures, water balance, and heat transfer into the permafrost that lies beneath the tundra.  The result is much more dramatic and rapid change in communities and element cycles than is predicted in response to warming alone.  In the long term, warming-related changes in disturbance regime may be more important than the direct effects of warming on arctic tundra and freshwater ecosystems, and on the entire Arctic. 

For these reasons, the overall goal of the Arctic LTER project for 2011-2017 was to understand changes in the arctic system at catchment and landscape scales as the product of: (i) direct effects of climate change on states, processes, and linkages of terrestrial and aquatic ecosystems, and (ii) indirect effects of climate change on ecosystems through a changing disturbance regime. The project addressed these issues in an integrated landscape framework, viewing the Arctic landscape as a spatially linked system including tundra, streams, and lakes. Synthesis of results was further promoted by collocation of terrestrial, stream, lake, and landscape interactions research in the same watersheds and by coordinated sampling of different components of the watersheds.  A mass balance approach to watershed and landscape biogeochemistry was used to develop predictive models and to evaluate results of individual studies in the context of the whole land-water system.  The major products of the research include peer-reviewed publications, a data base, and models that are already proving useful in understanding and predicting long term change in arctic landscape and the interactions and feedbacks between the Arctic and the Globe

Broader Impacts: One key indicator of impact is the number and diversity of citations of Arctic LTER publications. In 2016 we reported over 35,000 citations of the 579 journal publications since 1975 that include contributions from Arctic LTER scientists and collaborators, with an overall h-index of 101. In addition, Arctic LTER scientists had produced 7 books, 95 book chapters, 35 PhD theses, 66 Master's theses, and 15 honor’s theses. The project website is also regularly used as a source of data, with data downloads averaging 5-10 per week.

The Arctic LTER attracts collaborators from all over the world to work at Toolik Lake, make measurements on our long-term manipulations of tundra, streams, and lakes, and make use of our monitoring program and data. Largely because of this leveraging on LTER capabilities, the area around Toolik is the most thoroughly described and studied arctic landscape in the world. Research results from Toolik Lake are often used in comparative studies at other sites. Many of the ideas that drive research in other arctic landscapes were developed from research at Toolik Lake. Examples include the Danish Greenland Ecosystem Monitoring (GEM) programs at Zackenberg and Nuuk, which have continued to call on Arctic LTER personnel for collaboration and advice; the International Tundra Experiment (ITEX) is another example, Examples of impacts outside the Arctic include research to document C losses from surface waters as a component of regional and global C budgets, first pointed out by Kling and colleagues working at Toolik Lake in the 1990s, and the Kuparuk river fertilizer experiment and N isotope experiments, which were the inspiration for the continent-wide STREON experiment.

In education, opportunities for professional training and student research are offered at a variety of levels.  The Arctic LTER maintains an active “Schoolyard Ecology” program in which 2-6 K-12 teachers come to Toolik Lake every summer to work with scientists in the field, leading to improved teaching when they return to their classrooms.  The teachers come from throughout the US, including Alaska.  Arctic LTER also participates most years in the MBL’s Logan Science Journalism program, bringing science journalists to Toolik Lake to work with active scientists in the field.  In addition to graduate student research, 2-6 undergraduates are supported every summer (many via the NSF REU program) to learn research by doing it. 


Last Modified: 05/09/2018
Modified by: Gaius R Shaver

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