Now showing items 495-514 of 963

    • 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 ...
    • Macroalgal responses to experimental nutrient enrichment in shallow coastal waters : growth, internal nutrient pools, and isotopic signatures 

      Teichberg, Mirta; Fox, Sophia E.; Aguila, Carolina; Olsen, Ylva S.; Valiela, Ivan (Inter-Research, 2008-09-25)
      Increased nutrient inputs to temperate coastal waters have led to increased occurrences of macroalgal blooms worldwide. To identify nutrients that are limiting to macroalgae and to determine whether different forms of these ...
    • Macrophyte abundance in Waquoit Bay : effects of land-derived nitrogen loads on seasonal and multi-year biomass patterns 

      Fox, Sophia E.; Stieve, Erica; Valiela, Ivan; Hauxwell, Jennifer; McClelland, James W. (2008-01)
      Anthropogenic inputs of nutrients to coastal waters have rapidly restructured coastal ecosystems. To examine the response of macrophyte communities to land-derived nitrogen loading, we measured macrophyte biomass monthly ...
    • Macrophytes as indicators of land-derived wastewater : application of a δ15N method in aquatic systems 

      Cole, Marci L.; Kroeger, Kevin D.; McClelland, James W.; Valiela, Ivan (American Geophysical Union, 2005-01-25)
      We measured δ15N signatures of macrophytes and particulate organic matter (POM) in six estuaries and three freshwater ponds of Massachusetts to assess whether the signatures could be used as indicators of the magnitude of ...
    • Maloriented bivalents have metaphase positions at the spindle equator with more kinetochore microtubules to one pole than to the other 

      LaFountain, James R.; Oldenbourg, Rudolf (American Society for Cell Biology, 2004-09-22)
      To test the "traction fiber" model for metaphase positioning of bivalents during meiosis, kinetochore fibers of maloriented bivalents, induced during recovery from cold arrest, were analyzed with a liquid crystal polarizing ...
    • Mammalian end binding proteins control persistent microtubule growth 

      Komarova, Yulia A.; De Groot, Christian O.; Grigoriev, Ilya; Gouveia, Susana Montenegro; Munteanu, E. Laura; Schober, Joseph M.; Honnappa, Srinivas; Buey, Ruben M.; Hoogenraad, Casper C.; Dogterom, Marileen; Borisy, Gary G.; Steinmetz, Michel O.; Akhmanova, Anna (Rockefeller University Press, 2009-03-02)
      End binding proteins (EBs) are highly conserved core components of microtubule plus-end tracking protein networks. Here we investigated the roles of the three mammalian EBs in controlling microtubule dynamics and analyzed ...
    • Mapping optical path length and image enhancement using quantitative orientation-independent differential interference contrast microscopy 

      Shribak, Michael; Larkin, Kieran G.; Biggs, David (SPIE, 2017-01-06)
      We describe the principles of using orientation-independent differential interference contrast (OI-DIC) microscopy for mapping optical path length (OPL). Computation of the scalar two-dimensional OPL map is based on an ...
    • Mapping the biosphere : exploring species to understand the origin, organization and sustainability of biodiversity 

      Wheeler, Q. D.; Knapp, Sandra; Stevenson, D. W.; Stevenson, J.; Blum, Stan D.; Boom, B.. M.; Borisy, Gary G.; Buizer, J. L.; De Carvalho, M. R.; Cibrian, A.; Donoghue, M. J.; Doyle, V.; Gerson, E. M.; Graham, C. H.; Graves, P.; Graves, Sara J.; Guralnick, Robert P.; Hamilton, A. L.; Hanken, J.; Law, W.; Lipscomb, D. L.; Lovejoy, T. E.; Miller, Holly; Miller, J. S.; Naeem, Shahid; Novacek, M. J.; Page, L. M.; Platnick, N. I.; Porter-Morgan, H.; Raven, Peter H.; Solis, M. A.; Valdecasas, A. G.; Van Der Leeuw, S.; Vasco, A.; Vermeulen, N.; Vogel, J.; Walls, R. L.; Wilson, E. O.; Woolley, J. B. (Taylor & Francis, 2012-03-27)
      The time is ripe for a comprehensive mission to explore and document Earth's species. This calls for a campaign to educate and inspire the next generation of professional and citizen species explorers, investments in ...
    • Marine bacterial, archaeal and eukaryotic diversity and community structure on the continental shelf of the western Antarctic Peninsula 

      Luria, Catherine M.; Ducklow, Hugh W.; Amaral-Zettler, Linda A. (Inter-Research, 2014-10-02)
      The classic view of polar ocean foodwebs emphasizes large predators sustained by energy and material flow through short, efficient diatom-krill-predator food chains. Bacterial activity is generally low in cold polar waters ...
    • The Marine Microbial Eukaryote Transcriptome Sequencing Project (MMETSP) : illuminating the functional diversity of eukaryotic life in the oceans through transcriptome sequencing 

      Keeling, Patrick J.; Burki, Fabien; Wilcox, Heather M.; Allam, Bassem; Allen, Eric E.; Amaral-Zettler, Linda A.; Armbrust, E. Virginia; Archibald, John M.; Bharti, Arvind K.; Bell, Callum J.; Beszteri, Bank; Bidle, Kay D.; Cameron, Connor T.; Campbell, Lisa; Caron, David A.; Cattolico, Rose Ann; Collier, Jackie L.; Coyne, Kathryn J.; Davy, Simon K.; Deschamps, Phillipe; Dyhrman, Sonya T.; Edvardsen, Bente; Gates, Ruth D.; Gobler, Christopher J.; Greenwood, Spencer J.; Guida, Stephanie M.; Jacobi, Jennifer L.; Jakobsen, Kjetill S.; James, Erick R.; Jenkins, Bethany D.; John, Uwe; Johnson, Matthew D.; Juhl, Andrew R.; Kamp, Anja; Katz, Laura A.; Kiene, Ronald P.; Kudryavtsev, Alexander N.; Leander, Brian S.; Lin, Senjie; Lovejoy, Connie; Lynn, Denis; Marchetti, Adrian; McManus, George; Nedelcu, Aurora M.; Menden-Deuer, Susanne; Miceli, Cristina; Mock, Thomas; Montresor, Marina; Moran, Mary Ann; Murray, Shauna A.; Nadathur, Govind; Nagai, Satoshi; Ngam, Peter B.; Palenik, Brian; Pawlowski, Jan; Petroni, Giulio; Piganeau, Gwenael; Posewitz, Matthew C.; Rengefors, Karin; Romano, Giovanna; Rumpho, Mary E.; Rynearson, Tatiana A.; Schilling, Kelly B.; Schroeder, Declan C.; Simpson, Alastair G. B.; Slamovits, Claudio H.; Smith, David R.; Smith, G. Jason; Smith, Sarah R.; Sosik, Heidi M.; Stief, Peter; Theriot, Edward; Twary, Scott N.; Umale, Pooja E.; Vaulot, Daniel; Wawrik, Boris; Wheeler, Glen L.; Wilson, William H.; Xu, Yan; Zingone, Adriana; Worden, Alexandra Z. (Public Library of Science, 2014-06-24)
      Microbial ecology is plagued by problems of an abstract nature. Cell sizes are so small and population sizes so large that both are virtually incomprehensible. Niches are so far from our everyday experience as to make their ...
    • Marking 100 years since Rudolf Höber’s discovery of the insulating envelope surrounding cells and of the beta-dispersion exhibited by tissue 

      Pethig, Ronald; Schmueser, Ilka (Oslo Bioimpedance Group, 2012-11-23)
      Between 1910 and 1913 Rudolf Höber presented proof that the interiors of red blood cells and muscle cells contain conducting electrolytes, and that each conducting core is contained within an insulating membrane. He did ...
    • Marsh-atmosphere CO2 exchange in a New England salt marsh 

      Forbrich, Inke; Giblin, Anne E. (John Wiley & Sons, 2015-09-29)
      We studied marsh-atmosphere exchange of carbon dioxide in a high marsh dominated salt marsh during the months of May to October in 2012–2014. Tidal inundation at the site occurred only during biweekly spring tides, during ...
    • Massive bioaccumulation and self-assembly of phenazine compounds in live cells 

      Min, Kyoung Ah; Rajeswaran, Walajapet G.; Oldenbourg, Rudolf; Harris, Grant; Keswani, Rahul K.; Chiang, Mason; Rzeczycki, Phillip; Talattof, Arjang; Hafeez, Mahwish; Horobin, Richard W.; Larsen, Scott D.; Stringer, Kathleen A.; Rosania, Gus R. (John Wiley & Sons, 2015-06-05)
      Clofazimine is an orally administered drug that massively bioaccumulates in macrophages, forming membrane-bound intracellular structures possessing nanoscale supramolecular features. Here, a library of phenazine compounds ...
    • Massive multiplication of genome and ribosomes in dormant cells (akinetes) of Aphanizomenon ovalisporum (Cyanobacteria) 

      Sukenik, Assaf; Kaplan-Levy, Ruth N.; Mark Welch, Jessica L.; Post, Anton F. (2011-08)
      Akinetes are dormancy cells commonly found among filamentous cyanobacteria, many of which are toxic and/or nuisance, bloom-forming species. Development of akinetes from vegetative cells is a process that involves morphological ...