Now showing items 1-20 of 299

    • Accelerated phosphorus accumulation and acidification of soils under plastic greenhouse condition in four representative organic vegetable cultivation sites 

      Wang, Yanling; Zhang, Hailin; Tang, Jianwu; Xu, Jiangbing; Kou, Taiji; Huang, Hongmei (2015-04)
      Organic vegetable cultivation under plastic greenhouse conditions is expanding rapidly in the suburb of big cities in China due to the increasing demand for organic, out-of-season green vegetables and the sustainable ...
    • Acidification increases microbial polysaccharide degradation in the ocean 

      Piontek, J.; Lunau, M.; Handel, N.; Borchard, C.; Wurst, M.; Engel, A. (Copernicus Publications on behalf of the European Geosciences Union, 2010-05-19)
      With the accumulation of anthropogenic carbon dioxide (CO2), a proceeding decline in seawater pH has been induced that is referred to as ocean acidification. The ocean's capacity for CO2 storage is strongly affected by ...
    • Adjustment of forest ecosystem root respiration as temperature warms 

      Burton, Andrew J.; Melillo, Jerry M.; Frey, Serita D. (2008-06)
      Adjustment of ecosystem root respiration to warmer climatic conditions can alter the autotrophic portion of soil respiration and influence the amount of carbon available for biomass production. We examined 44 published ...
    • Aggregate measures of ecosystem services : can we take the pulse of nature? 

      Meyerson, Laura A.; Baron, Jill; Melillo, Jerry M.; Naiman, Robert J.; O'Malley, Robin I.; Orians, Gordon; Palmer, Margaret A.; Pfaff, Alexander S. P.; Running, Steven W.; Sala, Osvaldo E. (Ecological Society of America, 2005-02)
      National scale aggregate indicators of ecosystem services are useful for stimulating and supporting a broad public discussion about trends in the provision of these services. There are important considerations involved in ...
    • Amazon deforestation alters small stream structure, nitrogen biogeochemistry and connectivity to larger rivers 

      Deegan, Linda A.; Neill, Christopher; Haupert, Christie L.; Ballester, M. Victoria R.; Krusche, Alex V.; Victoria, Reynaldo L.; Thomas, Suzanne M.; de Moor, Emily (2010-08-29)
      Human activities that modify land cover can alter the structure and biogeochemistry of small streams but these effects are poorly known over large regions of the humid tropics where rates of forest clearing are high. We ...
    • The Amazon frontier of land-use change : croplands and consequences for greenhouse gas emissions 

      Galford, Gillian L.; Melillo, Jerry M.; Mustard, John F.; Cerri, Carlos E. P.; Cerri, Carlos C. (American Meteorological Society, 2010-10-28)
      The Brazilian Amazon is one of the most rapidly developing agricultural frontiers in the world. The authors assess changes in cropland area and the intensification of cropping in the Brazilian agricultural frontier state ...
    • An analysis of the carbon balance of the Arctic Basin from 1997 to 2006 

      McGuire, A. David; Hayes, Daniel J.; Kicklighter, David W.; Manizza, Manfredi; Zhuang, Qianlai; Chen, Min; Follows, Michael J.; Gurney, Kevin R.; McClelland, James W.; Melillo, Jerry M.; Peterson, Bruce J.; Prinn, Ronald G. (2010-06-18)
      This study used several model-based tools to analyze the dynamics of the Arctic Basin between 1997 and 2006 as a linked system of land-ocean-atmosphere C exchange. The analysis estimates that terrestrial areas of the ...
    • Application of DMSP/OLS nighttime light images : a meta-analysis and a systematic literature review 

      Huang, Qingxu; Yang, Xi; Gao, Bin; Yang, Yang; Zhao, Yuanyuan (MDPI AG, 2014-07-25)
      Since the release of the digital archives of Defense Meteorological Satellite Program Operational Line Scanner (DMSP/OLS) nighttime light data in 1992, a variety of datasets based on this database have been produced and ...
    • The application of δ18O and δD for understanding water pools and fluxes in a Typha Marsh 

      Bijoor, Neeta S.; Pataki, Diane E.; Rocha, Adrian V.; Goulden, Michael L. (2011-05)
      The δ18O and δD composition of water pools (leaf, root, standing water, and soil water) and fluxes (transpiration, evaporation) were used to understand ecohydrological processes in a managed Typha latifolia L. freshwater ...
    • The Arctic freshwater system : changes and impacts 

      White, Daniel; Hinzman, Larry; Alessa, Lilian; Cassano, John; Chambers, Molly; Falkner, Kelly; Francis, Jennifer; Gutowski, William J.; Holland, Marika M.; Holmes, Robert M.; Huntington, Henry; Kane, Douglas; Kliskey, Andrew; Lee, Craig M.; McClelland, James W.; Peterson, Bruce J.; Rupp, T. Scott; Straneo, Fiamma; Steele, Michael; Woodgate, Rebecca; Yang, Daqing; Yoshikawa, Kenji; Zhang, Tingjun (American Geophysical Union, 2007-11-20)
      Dramatic changes have been observed in the Arctic over the last century. Many of these involve the storage and cycling of fresh water. On land, precipitation and river discharge, lake abundance and size, glacier area and ...
    • Assessing the carbon balance of circumpolar Arctic tundra using remote sensing and process modeling 

      Sitch, Stephen; McGuire, A. David; Kimball, John S.; Gedney, Nicola; Gamon, John; Engstrom, Ryan; Wolf, Annett; Zhuang, Qianlai; Clein, Joy S.; McDonald, Kyle C. (Ecological Society of America, 2007-01)
      This paper reviews the current status of using remote sensing and process-based modeling approaches to assess the contemporary and future circumpolar carbon balance of Arctic tundra, including the exchange of both carbon ...
    • Bacterioplankton community shifts in an Arctic lake correlate with seasonal changes in organic matter source 

      Crump, Byron C.; Kling, George W.; Bahr, Michele; Hobbie, John E. (American Society for Microbiology, 2003-04)
      Seasonal shifts in bacterioplankton community composition in Toolik Lake, a tundra lake on the North Slope of Alaska, were related to shifts in the source (terrestrial versus phytoplankton) and lability of dissolved organic ...
    • Barnegat Bay-Little Egg Harbor Estuary : case study of a highly eutrophic coastal bay system 

      Kennish, Michael J.; Bricker, Suzanne B.; Dennison, William C.; Glibert, Patricia M.; Livingston, Robert J.; Moore, Kenneth A.; Noble, Rachel T.; Paerl, Hans W.; Ramstack, Joy M.; Seitzinger, Sybil P.; Tomasko, David A.; Valiela, Ivan (2006-09-26)
      The Barnegat Bay-Little Egg Harbor Estuary is classified here as a highly eutrophic estuary based on application of NOAA’s National Estuarine Eutrophication Assessment model. Because it is shallow, poorly flushed, and ...
    • Benthic community metabolism in deep and shallow Arctic lakes during 13 years of whole–lake fertilization 

      Daniels, William C.; Kling, George W.; Giblin, Anne E. (2015-05)
      Benthic primary production and oxygen consumption are important components of lake biogeochemical cycling. We performed whole-lake nutrient manipulations in arctic Alaska to assess the controls of lake morphometry, ...
    • Better to light a candle than curse the darkness : illuminating spatial localization and temporal dynamics of rapid microbial growth in the rhizosphere 

      Herron, Patrick M.; Gage, Daniel J.; Pinedo, Catalina Arango; Haider, Zane K.; Cardon, Zoe G. (Frontiers Media, 2013-09-02)
      The rhizosphere is a hotbed of microbial activity in ecosystems, fueled by carbon compounds from plant roots. Basic questions about the location and dynamics of plant-spurred microbial growth in the rhizosphere are difficult ...
    • Beyond leaf color : comparing camera-based phenological metrics with leaf biochemical, biophysical, and spectral properties throughout the growing season of a temperate deciduous forest 

      Yang, Xi; Tang, Jianwu; Mustard, John F. (John Wiley & Sons, 2014-03-31)
      Plant phenology, a sensitive indicator of climate change, influences vegetation-atmosphere interactions by changing the carbon and water cycles from local to global scales. Camera-based phenological observations of the ...
    • Biogeography of bacterioplankton in lakes and streams of an arctic tundra catchment 

      Crump, Byron C.; Adams, Heather E.; Hobbie, John E.; Kling, George W. (Ecological Society of America, 2007-06)
      Bacterioplankton community composition was compared across 10 lakes and 14 streams within the catchment of Toolik Lake, a tundra lake in Arctic Alaska, during seven surveys conducted over three years using denaturing ...
    • Biomass and toxicity responses of poison ivy (Toxicodendron radicans) to elevated atmospheric CO2 : reply 

      Mohan, Jacqueline E.; Ziska, Lewis H.; Thomas, Richard B.; Sicher, Richard C.; George, Kate; Clark, James S.; Schlesinger, William H. (Ecological Society of America, 2008-02)
    • Biomass offsets little or none of permafrost carbon release from soils, streams, and wildfire : an expert assessment 

      Abbott, Benjamin W.; Jones, Jeremy B.; Schuur, Edward A. G.; Chapin, F. Stuart; Bowden, William B.; Bret-Harte, M. Syndonia; Epstein, Howard E.; Flannigan, Michael; Harms, Tamara K.; Hollingsworth, Teresa N.; Mack, Michelle C.; McGuire, A. David; Natali, Susan M.; Rocha, Adrian V.; Tank, Suzanne E.; Turetsky, Merritt R.; Vonk, Jorien E.; Wickland, Kimberly; Aiken, George R.; Alexander, Heather D.; Amon, Rainer M. W.; Benscoter, Brian; Bergeron, Yves; Bishop, Kevin; Blarquez, Olivier; Bond-Lamberty, Benjamin; Breen, Amy L.; Buffam, Ishi; Cai, Yihua; Carcaillet, Christopher; Carey, Sean K.; Chen, Jing M.; Chen, Han Y. H.; Christensen, Torben R.; Cooper, Lee W.; Cornelissen, J. Hans C.; de Groot, William J.; DeLuca, Thomas Henry; Dorrepaal, Ellen; Fetcher, Ned; Finlay, Jacques C.; Forbes, Bruce C.; French, Nancy H. F.; Gauthier, Sylvie; Girardin, Martin; Goetz, Scott J.; Goldammer, Johann G.; Gough, Laura; Grogan, Paul; Guo, Laodong; Higuera, Philip E.; Hinzman, Larry; Hu, Feng Sheng; Hugelius, Gustaf; JAFAROV, ELCHIN; Jandt, Randi; Johnstone, Jill F.; Karlsson, Jan; Kasischke, Eric S.; Kattner, Gerhard; Kelly, Ryan; Keuper, Frida; Kling, George W.; Kortelainen, Pirkko; Kouki, Jari; Kuhry, Peter; Laudon, Hjalmar; Laurion, Isabelle; Macdonald, Robie W.; Mann, Paul J.; Martikainen, Pertti; McClelland, James W.; Molau, Ulf; Oberbauer, Steven F; Olefeldt, David; Paré, David; Parisien, Marc-André; Payette, Serge; Peng, Changhui; Pokrovsky, Oleg; Rastetter, Edward B.; Raymond, Peter A.; Raynolds, Martha K.; Rein, Guillermo; Reynolds, James F.; Robards, Martin; Rogers, Brendan; Schädel, Christina; Schaefer, Kevin; Schmidt, Inger K.; Shvidenko, Anatoly; Sky, Jasper; Spencer, Robert G. M.; Starr, Gregory; Striegl, Robert; Teisserenc, Roman; Tranvik, Lars J.; Virtanen, Tarmo; Welker, Jeffrey M.; Zimov, Sergey (IOPScience, 2016-03-07)
      As the permafrost region warms, its large organic carbon pool will be increasingly vulnerable to decomposition, combustion, and hydrologic export. Models predict that some portion of this release will be offset by increased ...
    • Biomass transfer subsidizes nitrogen to offshore food webs 

      Nelson, James A.; Stallings, Christopher D.; Landing, William M.; Chanton, Jeffrey P. (2013-03-17)
      We evaluated the potential contribution of allochthonous biomass subsidies to the upper trophic levels of offshore food webs in the northeastern Gulf of Mexico (GOM). We made this evaluation considering nitrogen, an essential ...