Now showing items 1-8 of 8

  • Climate and species affect fine root production with long-term fertilization in acidic tussock tundra near Toolik Lake, Alaska 

    Sullivan, Patrick F.; Sommerkorn, Martin; Rueth, Heather M.; Nadelhoffer, Knute J.; Shaver, Gaius R.; Welker, Jeffrey M. (2007-04-12)
    Long-term fertilization of acidic tussock tundra has led to changes in plant species composition, increases in aboveground production and biomass and substantial losses of soil organic carbon (SOC). Root litter is an ...
  • Differential responses of ammonia-oxidizing archaea and bacteria to long-term fertilization in a New England salt marsh 

    Peng, Xuefeng; Yando, Erik; Hildebrand, Erica; Dwyer, Courtney; Kearney, Anne; Waciega, Alex; Valiela, Ivan; Bernhard, Anne E. (Frontiers Media, 2013-01-22)
    Since the discovery of ammonia-oxidizing archaea (AOA), new questions have arisen about population and community dynamics and potential interactions between AOA and ammonia-oxidizing bacteria (AOB). We investigated the ...
  • Elevated pCO2 exposure during fertilization of the bay scallop Argopecten irradians reduces larval survival but not subsequent shell size 

    White, Meredith M.; Mullineaux, Lauren S.; McCorkle, Daniel C.; Cohen, Anne L. (Inter-Research, 2014-02-17)
    Ocean acidification, characterized by elevated partial pressure of CO2 (pCO2), generally has negative effects on early life stages of invertebrates. We tested the idea that fertilization is a critical CO2 exposure stage ...
  • Mitochondrial respiration and Ca2+ waves are linked during fertilization and meiosis completion 

    Dumollard, Remi; Hammar, Katherine; Porterfield, D. Marshall; Smith, Peter J. S.; Cibert, Christian; Rouviere, Christian; Sardet, Christian (Company of Biologists Limited, 2003)
    Fertilization increases both cytosolic Ca2+ concentration and oxygen consumption in the egg but the relationship between these two phenomena remains largely obscure. We have measured mitochondrial oxygen consumption and ...
  • Revisiting the role of H+ in chemotactic signaling of sperm 

    Solzin, Johannes; Helbig, Annika; Van, Qui; Brown, Joel E.; Hildebrand, Eilo; Weyand, Ingo; Kaupp, U. Benjamin (Rockefeller University Press, 2004-07-26)
    Chemotaxis of sperm is an important step toward fertilization. During chemotaxis, sperm change their swimming behavior in a gradient of the chemoattractant that is released by the eggs, and finally sperm accumulate near ...
  • Species compositional differences on different-aged glacial landscapes drive contrasting responses of tundra to nutrient addition 

    Hobbie, Sarah E.; Gough, Laura; Shaver, Gaius R. (2005-01-17)
    In the northern foothills of the Brooks Range, Alaska, moist non-acidic tundra dominates more recently deglaciated upland landscapes, whereas moist acidic tundra dominates older upland landscapes. In previous studies, ...
  • Synthesis of iron fertilization experiments : from the Iron Age in the Age of Enlightenment 

    Baar, Hein J. W. de; Boyd, Philip W.; Coale, Kenneth H.; Landry, Michael R.; Tsuda, Atsushi; Assmy, Philipp; Bakker, Dorothee C. E.; Bozec, Yann; Barber, Richard T.; Brzezinski, Mark A.; Buesseler, Ken O.; Boye, Marie; Croot, Peter L.; Gervais, Frank; Gorbunov, Maxim Y.; Harrison, Paul J.; Hiscock, William T.; Laan, Patrick; Lancelot, Christiane; Law, Cliff S.; Levasseur, Maurice; Marchetti, Adrian; Millero, Frank J.; Nishioka, Jun; Nojiri, Yukihiro; van Oijen, Tim; Riebesell, Ulf; Rijkenberg, Micha J. A.; Saito, Hiroaki; Takeda, Shigenobu; Timmermans, Klaas R.; Veldhuis, Marcel J. W.; Waite, Anya M.; Wong, Chi-Shing (American Geophysical Union, 2005-09-28)
    Comparison of eight iron experiments shows that maximum Chl a, the maximum DIC removal, and the overall DIC/Fe efficiency all scale inversely with depth of the wind mixed layer (WML) defining the light environment. Moreover, ...
  • Top-down and bottom-up control of infauna varies across the saltmarsh landscape 

    Fleeger, John W.; Johnson, David S.; Galvan, Kari A.; Deegan, Linda A. (2007-12)
    Responses of infaunal saltmarsh benthic invertebrates to whole-ecosystem fertilization and predator removal were quantified in Plum Island Estuary, Massachusetts, USA. Throughout a growing season, we enriched an experimental ...