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  • *Ecosystem  (168)
  • 2005-2009  (168)
  • 1940-1944
  • 2009  (168)
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Keywords
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  • 2005-2009  (168)
  • 1940-1944
Year
  • 1
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    A constant flux of diverse thermophilic bacteria into the cold Arctic seabed (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-19
    Description: Microorganisms have been repeatedly discovered in environments that do not support their metabolic activity. Identifying and quantifying these misplaced organisms can reveal dispersal mechanisms that shape natural microbial diversity. Using endospore germination experiments, we estimated a stable supply of thermophilic bacteria into permanently cold Arctic marine sediment at a rate exceeding 10(8) spores per square meter per year. These metabolically and phylogenetically diverse Firmicutes show no detectable activity at cold in situ temperatures but rapidly mineralize organic matter by hydrolysis, fermentation, and sulfate reduction upon induction at 50 degrees C. The closest relatives to these bacteria come from warm subsurface petroleum reservoir and ocean crust ecosystems, suggesting that seabed fluid flow from these environments is delivering thermophiles to the cold ocean. These transport pathways may broadly influence microbial community composition in the marine environment.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hubert, Casey -- Loy, Alexander -- Nickel, Maren -- Arnosti, Carol -- Baranyi, Christian -- Bruchert, Volker -- Ferdelman, Timothy -- Finster, Kai -- Christensen, Flemming Monsted -- Rosa de Rezende, Julia -- Vandieken, Verona -- Jorgensen, Bo Barker -- P 20185/Austrian Science Fund FWF/Austria -- New York, N.Y. -- Science. 2009 Sep 18;325(5947):1541-4. doi: 10.1126/science.1174012.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Biogeochemistry Group, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, D-28359 Bremen, Germany. chubert@mpi-bremen.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19762643" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis ; Arctic Regions ; *Bacteria/classification/isolation & purification ; Bacterial Physiological Phenomena ; *Biodiversity ; *Cold Climate ; Cold Temperature ; *Ecosystem ; Fatty Acids, Volatile/metabolism ; Fermentation ; Geologic Sediments/*microbiology ; Hot Temperature ; Oxidation-Reduction ; Phylogeny ; Spores, Bacterial/*physiology ; Sulfates/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    A contemporary microbially maintained subglacial ferrous "ocean" (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-18
    Description: An active microbial assemblage cycles sulfur in a sulfate-rich, ancient marine brine beneath Taylor Glacier, an outlet glacier of the East Antarctic Ice Sheet, with Fe(III) serving as the terminal electron acceptor. Isotopic measurements of sulfate, water, carbonate, and ferrous iron and functional gene analyses of adenosine 5'-phosphosulfate reductase imply that a microbial consortium facilitates a catalytic sulfur cycle. These metabolic pathways result from a limited organic carbon supply because of the absence of contemporary photosynthesis, yielding a subglacial ferrous brine that is anoxic but not sulfidic. Coupled biogeochemical processes below the glacier enable subglacial microbes to grow in extended isolation, demonstrating how analogous organic-starved systems, such as Neoproterozoic oceans, accumulated Fe(II) despite the presence of an active sulfur cycle.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mikucki, Jill A -- Pearson, Ann -- Johnston, David T -- Turchyn, Alexandra V -- Farquhar, James -- Schrag, Daniel P -- Anbar, Ariel D -- Priscu, John C -- Lee, Peter A -- New York, N.Y. -- Science. 2009 Apr 17;324(5925):397-400. doi: 10.1126/science.1167350.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138 USA. jill.a.mikucki@dartmouth.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19372431" target="_blank"〉PubMed〈/a〉
    Keywords: Anaerobiosis ; Antarctic Regions ; Autotrophic Processes ; Bacteria/growth & development/*metabolism ; *Ecosystem ; Ferric Compounds/*metabolism ; Ferrous Compounds/*metabolism ; Heterotrophic Processes ; *Ice Cover ; Metabolic Networks and Pathways ; Molecular Sequence Data ; Oxidation-Reduction ; Oxidoreductases Acting on Sulfur Group Donors/genetics/metabolism ; Oxygen/metabolism ; Oxygen Isotopes/analysis ; Phylogeny ; Seawater/chemistry/*microbiology ; Sulfates/metabolism ; Sulfites/metabolism ; Sulfur/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    A magnificence to share (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉England -- Nature. 2009 Apr 16;458(7240):808. doi: 10.1038/458808a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19369979" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antarctic Regions ; *Ecosystem ; International Cooperation/*legislation & jurisprudence ; Travel/*legislation & jurisprudence
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    A safe operating space for humanity (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rockstrom, Johan -- Steffen, Will -- Noone, Kevin -- Persson, Asa -- Chapin, F Stuart 3rd -- Lambin, Eric F -- Lenton, Timothy M -- Scheffer, Marten -- Folke, Carl -- Schellnhuber, Hans Joachim -- Nykvist, Bjorn -- de Wit, Cynthia A -- Hughes, Terry -- van der Leeuw, Sander -- Rodhe, Henning -- Sorlin, Sverker -- Snyder, Peter K -- Costanza, Robert -- Svedin, Uno -- Falkenmark, Malin -- Karlberg, Louise -- Corell, Robert W -- Fabry, Victoria J -- Hansen, James -- Walker, Brian -- Liverman, Diana -- Richardson, Katherine -- Crutzen, Paul -- Foley, Jonathan A -- England -- Nature. 2009 Sep 24;461(7263):472-5. doi: 10.1038/461472a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stockholm Resilience Centre, Stockholm University, Kraftriket 2B, 10691 Stockholm, Sweden.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779433" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; Civilization ; Conservation of Natural Resources/*methods/trends ; *Earth (Planet) ; Ecology/*methods/*trends ; *Ecosystem ; Extinction, Biological ; Fossils ; Green Chemistry Technology/*methods/trends ; Greenhouse Effect ; History, 20th Century ; History, 21st Century ; History, Ancient ; *Human Activities/history ; Humans ; Nitrogen/metabolism ; Phosphorus/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 5
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    A standardized response to biological invasions (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rashid, Irfan -- Prakash Sharma, Gyan -- Esler, Karen J -- Reshi, Zafar A -- Khuroo, Anzar A -- Simpson, Annie -- New York, N.Y. -- Science. 2009 Jul 10;325(5937):146; author reply 146-7. doi: 10.1126/science.325_146b.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Botany, University of Kashmir, Srinagar, Jammu and Kashmir 190 006, India. ecoirfan@yahoo.co.in〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19589981" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; *Conservation of Natural Resources ; *Ecosystem ; Europe ; Government Regulation ; *International Cooperation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    AAAS annual meeting. Will many endangered species recover? (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stokstad, Erik -- New York, N.Y. -- Science. 2009 Feb 20;323(5917):998-9. doi: 10.1126/science.323.5917.998b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19229008" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Birds ; *Conservation of Natural Resources ; *Ecosystem ; Extinction, Biological ; Population Dynamics ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 7
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    Abiotic gas formation drives nitrogen loss from a desert ecosystem (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-11-07
    Description: In arid environments such as deserts, nitrogen is often the most limiting nutrient for biological activity. The majority of the ecosystem nitrogen flux is typically thought to be driven by production and loss of reactive nitrogen species by microorganisms in the soil. We found that high soil-surface temperatures (greater than 50 degrees C), driven by solar radiation, are the primary cause of nitrogen loss in Mojave Desert soils. This abiotic pathway not only enables the balancing of arid ecosystem nitrogen budgets, but also changes our view of global nitrogen cycling and the predicted impact of climate change and increased temperatures on nitrogen bioavailability.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCalley, Carmody K -- Sparks, Jed P -- New York, N.Y. -- Science. 2009 Nov 6;326(5954):837-40. doi: 10.1126/science.1178984.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolutionary Biology, Corson Hall Room E149, Cornell University, Ithaca, NY 14853, USA. ckm27@cornell.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19892980" target="_blank"〉PubMed〈/a〉
    Keywords: Ammonia/*analysis ; *Desert Climate ; *Ecosystem ; Gases ; Hot Temperature ; Larrea ; Nitrogen Oxides/*analysis ; Soil/*analysis ; Southwestern United States ; Sunlight
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Addicted to rubber (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mann, Charles C -- New York, N.Y. -- Science. 2009 Jul 31;325(5940):564-6. doi: 10.1126/science.325_564.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19644107" target="_blank"〉PubMed〈/a〉
    Keywords: *Agriculture/economics/methods ; Ascomycota/pathogenicity ; Biodiversity ; *Camellia sinensis/growth & development ; China ; *Conservation of Natural Resources ; Crops, Agricultural ; *Ecosystem ; *Hevea/growth & development/microbiology ; Laos ; Myanmar ; Plant Diseases/microbiology ; *Rubber ; Tea ; Trees
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Agriculture. The rubber juggernaut (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-05-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ziegler, Alan D -- Fox, Jefferson M -- Xu, Jianchu -- New York, N.Y. -- Science. 2009 May 22;324(5930):1024-5. doi: 10.1126/science.1173833.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Geography, National University of Singapore, Singapore 117570. adz@nus.edu.sg〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19460994" target="_blank"〉PubMed〈/a〉
    Keywords: *Agriculture/methods ; Asia, Southeastern ; Biodiversity ; China ; *Ecosystem ; *Environment ; Hevea/*growth & development ; *Trees
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    An ecologist marvels at animals that learn to eavesdrop (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cocroft, Rex -- England -- Nature. 2009 Jul 23;460(7254):439. doi: 10.1038/460439e.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Missouri, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19626069" target="_blank"〉PubMed〈/a〉
    Keywords: Animal Communication ; Animals ; *Biological Evolution ; *Ecosystem ; *Learning ; Predatory Behavior
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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