Now showing items 495-514 of 992

    • Light dependence of Zostera marina annual growth dynamics in estuaries subject to different degrees of eutrophication 

      Hauxwell, Jennifer; Cebrian, Just; Valiela, Ivan (2005-05-20)
      In temperate, shallow systems with clear waters the temporal dynamic of eelgrass (Zostera marina) growth is closely associated with the seasonality of irradiance at the water's surface. It has been recently suggested that ...
    • The light-sensitive conductance of melanopsin-expressing Joseph and Hesse cells in amphioxus 

      Pulido, Camila; Malagon, Gerardo; Ferrer, Camilo; Chen, Jun Kui; Angueyra, Juan Manuel; Nasi, Enrico; Gomez, Maria del Pilar (Rockefeller University Press, 2011-12-26)
      Two types of microvillar photoreceptors in the neural tube of amphioxus, an early chordate, sense light via melanopsin, the same photopigment as in “circadian” light detectors of higher vertebrates. Because in amphioxus ...
    • Limnology of tundra ponds, Barrow, Alaska 

      Hobbie, John E. (Dowden, Hutchinson & Ross, 1980)
      This book is a report of investigations of several small ponds on the arctic tundra near Barrow, Alaska. The main study, which ran from 1971 through 1973, was funded from three sources: The National Science Foundation, ...
    • Linkages among runoff, dissolved organic carbon, and the stable oxygen isotope composition of seawater and other water mass indicators in the Arctic Ocean 

      Cooper, Lee W.; Benner, Ronald; McClelland, James W.; Peterson, Bruce J.; Holmes, Robert M.; Raymond, Peter A.; Hansell, Dennis A.; Grebmeier, Jacqueline M.; Codispoti, Louis A. (American Geophysical Union, 2005-12-07)
      Concentrations of dissolved organic carbon (DOC) and δ18O values have been determined following sampling of runoff from a number of major arctic rivers, including the Ob, Yenisey, Lena, Kolyma, Mackenzie and Yukon in ...
    • Linking ecology and economics for ecosystem management 

      Farber, Stephen; Costanza, Robert; Childers, Daniel L.; Erickson, Jon; Gross, Katherine; Grove, J. Morgan; Hopkinson, Charles S.; Kahn, James; Pincetl, Stephanie; Troy, Austin; Warren, Paige; Wilson, Matthew (American Institute of Biological Sciences, 2006-02)
      This article outlines an approach, based on ecosystem services, for assessing the trade-offs inherent in managing humans embedded in ecological systems. Evaluating these trade-offs requires an understanding of the biophysical ...
    • Live-cell imaging RNAi screen identifies PP2A–B55α and importin-β1 as key mitotic exit regulators in human cells 

      Schmitz, Michael H. A.; Held, Michael; Janssens, Veerle; Hutchins, James R. A.; Hudecz, Otto; Ivanova, Elitsa; Goris, Jozef; Trinkle-Mulcahy, Laura; Lamond, Angus I.; Poser, Ina; Hyman, Anthony A.; Mechtler, Karl; Peters, Jan-Michael; Gerlich, Daniel W. (2010-07)
      When vertebrate cells exit mitosis, they reorganize various cellular structures to build functional interphase cells1. This depends on Cdk1 inactivation and subsequent dephosphorylation of its substrates2-4. Members of ...
    • Living cells and dynamic molecules observed with the polarized light microscope : the legacy of Shinya Inoué 

      Tani, Tomomi; Shribak, Michael; Oldenbourg, Rudolf (Marine Biological Laboratory, 2016-08)
      In 1948, Shinya Inoué arrived in the United States for graduate studies at Princeton. A year later he came to Woods Hole, starting a long tradition of summer research at the Marine Biological Laboratory (MBL), which quickly ...
    • Long serial analysis of gene expression for gene discovery and transcriptome profiling in the widespread marine coccolithophore Emiliania huxleyi 

      Dyhrman, Sonya T.; Haley, Sheean T.; Birkeland, Shanda R.; Wurch, Louie L.; Cipriano, Michael J.; McArthur, Andrew G. (American Society for Microbiology, 2006-01)
      The abundant and widespread coccolithophore Emiliania huxleyi plays an important role in mediating CO2 exchange between the ocean and the atmosphere through its impact on marine photosynthesis and calcification. Here, we ...
    • Long-term biological effects of petroleum residues on fiddler crabs in salt marshes 

      Culbertson, Jennifer B.; Valiela, Ivan; Peacock, Emily E.; Reddy, Christopher M.; Carter, Anna; VanderKruik, Rachel (2007)
      In September 1969,the Florida barge spilled 700,000 L of No. 2 fuel oil into the salt marsh sediments of Wild Harbor (Buzzards Bay, MA). Today the aboveground environment appears unaffected, but a substantial amount of ...
    • Long-term CO2 enrichment of a forest ecosystem : implications for forest regeneration and succession 

      Mohan, Jacqueline E.; Clark, James S.; Schlesinger, William H. (Ecological Society of America, 2007-06)
      The composition and successional status of a forest affect carbon storage and net ecosystem productivity, yet it remains unclear whether elevated atmospheric carbon dioxide (CO2) will impact rates and trajectories of forest ...
    • Long-term ecological research in a human-dominated world 

      Robertson, G. Philip; Collins, Scott L.; Foster, David R.; Brokaw, Nicholas; Ducklow, Hugh W.; Gragson, Ted L.; Gries, Corinna; Hamilton, Stephen K.; McGuire, A. David; Moore, John C.; Stanley, Emily H.; Waide, Robert B.; Williams, Mark W. (American Institute of Biological Sciences, 2012-04)
      The US Long Term Ecological Research (LTER) Network enters its fourth decade with a distinguished record of achievement in ecological science. The value of long-term observations and experiments has never been more important ...
    • Long-term experimental warming and nutrient additions increase productivity in tall deciduous shrub tundra 

      DeMarco, Jennie; Mack, Michelle C.; Bret-Harte, M. Syndonia; Burton, Mark; Shaver, Gaius R. (Ecological Society of America, 2014-06-19)
      Warming Arctic temperatures can drive changes in vegetation structure and function directly by stimulating plant growth or indirectly by stimulating microbial decomposition of organic matter and releasing more nutrients ...
    • Long-term forest soil warming alters microbial communities in temperate forest soils 

      DeAngelis, Kristen M.; Pold, Grace; Topcuoglu, Begum D.; van Diepen, Linda T. A.; Varney, Rebecca M.; Blanchard, Jeffrey L.; Melillo, Jerry M.; Frey, Serita D. (Frontiers Media, 2015-02-13)
      Soil microbes are major drivers of soil carbon cycling, yet we lack an understanding of how climate warming will affect microbial communities. Three ongoing field studies at the Harvard Forest Long-term Ecological Research ...
    • Long-term studies of the marine ecosystem along the west Antarctic Peninsula 

      Ducklow, Hugh W. (2008-06-27)
      Articles in this volume focus on longer-term studies of the marine ecosystem of the continental shelf west of the Antarctic Peninsula, principally by the Palmer, Antarctica Long- Term Ecological Research project (Ross ...
    • Long-term survival of adult Arctic grayling (Thymallus arcticus) in the Kuparuk River, Alaska 

      Buzby, Karen M.; Deegan, Linda A. (National Research Council Canada, 2004-12-23)
      In many long-lived species such as Arctic grayling (Thymallus arcticus), population growth rate is most sensitive to changes in adult survival probabilities. Understanding the factors that regulate adult survival in this ...
    • Long-term warming alters carbohydrate degradation potential in temperate forest soils 

      Pold, Grace; Billings, Andrew F.; Blanchard, Jeffrey L.; Burkhardt, Daniel B.; Frey, Serita D.; Melillo, Jerry M.; Schnabel, Julia; van Diepen, Linda T. A.; DeAngelis, Kristen M. (American Society for Microbiology, 2016-09-02)
      As Earth's climate warms, soil carbon pools and the microbial communities that process them may change, altering the way in which carbon is recycled in soil. In this study, we used a combination of metagenomics and bacterial ...
    • Looking deeper into the soil : biophysical controls and seasonal lags of soil CO2 production and efflux 

      Vargas, Rodrigo; Baldocchi, Dennis D.; Allen, Michael F.; Bahn, Michael; Black, T. Andrew; Collins, Scott L.; Yuste, Jorge Curiel; Hirano, Takashi; Jassal, Rachhpal S.; Pumpanen, Jukka; Tang, Jianwu (Ecological Society of America, 2010-09)
      We seek to understand how biophysical factors such as soil temperature (Ts), soil moisture (θ), and gross primary production (GPP) influence CO2 fluxes across terrestrial ecosystems. Recent advancements in automated ...
    • Low-dose arsenic compromises the immune response to influenza A infection in vivo 

      Kozul, Courtney D.; Ely, Kenneth H.; Enelow, Richard I.; Hamilton, Joshua W. (National Institute of Environmental Health Sciences, 2009-05-20)
      Arsenic exposure is a significant worldwide environmental health concern. We recently reported that 5-week exposure to environmentally relevant levels (10 and 100 ppb) of As in drinking water significantly altered components ...
    • LTR-retrotransposons from Bdelloid rotifers capture additional ORFs shared between highly diverse retroelement types 

      Rodriguez, Fernando; Kenefick, Aubrey W.; Arkhipova, Irina R. (MDPI AG, 2017-04-11)
      Rotifers of the class Bdelloidea, microscopic freshwater invertebrates, possess a highlydiversified repertoire of transposon families, which, however, occupy less than 4% of genomic DNA in the sequenced representative ...
    • Luteinizing Hormone is an effective replacement for hCG to induce ovulation in Xenopus 

      Wlizla, Marcin; Falco, Rosalia; Peshkin, Leonid; Parlow, Albert F.; Horb, Marko E. (Elsevier, 2016-06-02)
      Injection of human Chorionic Gonadotropin (hCG) directly into the dorsal lymph sac of Xenopus is a commonly used protocol for induction of ovulation, but recent shortages in the stocks of commercially available hCG as well ...