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  • Articles  (115)
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  • Articles  (115)
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  • American Association for the Advancement of Science (AAAS)  (115)
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  • 1
    Publication Date: 2005-02-26
    Description: The genomic diversity and relative importance of distinct genotypes within natural bacterial populations have remained largely unknown. Here, we analyze the diversity and annual dynamics of a group of coastal bacterioplankton (greater than 99% 16S ribosomal RNA identity to Vibrio splendidus). We show that this group consists of at least a thousand distinct genotypes, each occurring at extremely low environmental concentrations (on average less than one cell per milliliter). Overall, the genomes show extensive allelic diversity and size variation. Individual genotypes rarely recurred in samples, and allelic distribution did not show spatial or temporal substructure. Ecological considerations suggest that much genotypic and possibly phenotypic variation within natural populations should be considered neutral.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thompson, Janelle R -- Pacocha, Sarah -- Pharino, Chanathip -- Klepac-Ceraj, Vanja -- Hunt, Dana E -- Benoit, Jennifer -- Sarma-Rupavtarm, Ramahi -- Distel, Daniel L -- Polz, Martin F -- New York, N.Y. -- Science. 2005 Feb 25;307(5713):1311-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Civil and Environmental Engineering, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15731455" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Chaperonin 60/genetics ; *Ecosystem ; Electrophoresis, Gel, Pulsed-Field ; *Genetic Variation ; Genome, Bacterial ; Genotype ; Molecular Sequence Data ; Plankton/classification/*genetics/growth & development/isolation & purification ; Polymerase Chain Reaction ; Ribotyping ; Seawater/*microbiology ; Time Factors ; Vibrio/classification/*genetics/isolation & purification
    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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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-02-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Illius, Andrew W -- New York, N.Y. -- Science. 2005 Feb 4;307(5710):674; author reply 674.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15714610" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Conservation of Natural Resources ; Ecology ; *Ecosystem ; Elephants ; Environment ; *Mammals ; Population Density ; Population Dynamics
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-05-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kintisch, Eli -- New York, N.Y. -- Science. 2005 May 27;308(5726):1251.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15919972" target="_blank"〉PubMed〈/a〉
    Keywords: *Conservation of Natural Resources ; *Ecosystem ; *Environment ; Genetic Variation ; Housing ; *Iridaceae/genetics/growth & development ; Israel ; *Residence Characteristics
    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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  • 4
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-05-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Inman, Mason -- New York, N.Y. -- Science. 2005 May 13;308(5724):937.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15890852" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Climate ; *Ecosystem ; Environment ; Fisheries ; *Fishes ; North Sea ; Population Dynamics ; *Seawater ; Temperature
    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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  • 5
    Publication Date: 2005-07-26
    Description: Land use has generally been considered a local environmental issue, but it is becoming a force of global importance. Worldwide changes to forests, farmlands, waterways, and air are being driven by the need to provide food, fiber, water, and shelter to more than six billion people. Global croplands, pastures, plantations, and urban areas have expanded in recent decades, accompanied by large increases in energy, water, and fertilizer consumption, along with considerable losses of biodiversity. Such changes in land use have enabled humans to appropriate an increasing share of the planet's resources, but they also potentially undermine the capacity of ecosystems to sustain food production, maintain freshwater and forest resources, regulate climate and air quality, and ameliorate infectious diseases. We face the challenge of managing trade-offs between immediate human needs and maintaining the capacity of the biosphere to provide goods and services in the long term.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Foley, Jonathan A -- Defries, Ruth -- Asner, Gregory P -- Barford, Carol -- Bonan, Gordon -- Carpenter, Stephen R -- Chapin, F Stuart -- Coe, Michael T -- Daily, Gretchen C -- Gibbs, Holly K -- Helkowski, Joseph H -- Holloway, Tracey -- Howard, Erica A -- Kucharik, Christopher J -- Monfreda, Chad -- Patz, Jonathan A -- Prentice, I Colin -- Ramankutty, Navin -- Snyder, Peter K -- New York, N.Y. -- Science. 2005 Jul 22;309(5734):570-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Sustainability and the Global Environment (SAGE), University of Wisconsin, 1710 University Avenue, Madison, WI 53726, USA. jfoley@wisc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16040698" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Air Pollution ; Animals ; Animals, Wild ; Climate ; Communicable Diseases/epidemiology/transmission ; *Conservation of Natural Resources ; *Ecosystem ; *Environment ; Fresh Water ; Human Activities ; Humans ; Policy Making ; Trees
    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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  • 6
    Publication Date: 2005-01-22
    Description: Territorial behavior is expected to buffer populations against short-term environmental perturbations, but we have found that group living in African lions causes a complex response to long-term ecological change. Despite numerous gradual changes in prey availability and vegetative cover, regional populations of Serengeti lions remained stable for 10- to 20-year periods and only shifted to new equilibria in sudden leaps. Although gradually improving environmental conditions provided sufficient resources to permit the subdivision of preexisting territories, regional lion populations did not expand until short-term conditions supplied enough prey to generate large cohorts of surviving young. The results of a simulation model show that the observed pattern of "saltatory equilibria" results from the lions' grouping behavior.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Packer, Craig -- Hilborn, Ray -- Mosser, Anna -- Kissui, Bernard -- Borner, Markus -- Hopcraft, Grant -- Wilmshurst, John -- Mduma, Simon -- Sinclair, Anthony R E -- New York, N.Y. -- Science. 2005 Jan 21;307(5708):390-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology, Evolution, and Behavior, University of Minnesota, 1987 Upper Buford Circle, Saint Paul, MN 55108, USA. packer@cbs.umn.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15662005" target="_blank"〉PubMed〈/a〉
    Keywords: Algorithms ; Animals ; Antelopes ; *Behavior, Animal ; *Ecosystem ; Environment ; Female ; *Lions/physiology ; Male ; Models, Biological ; Plants ; Population Density ; Population Dynamics ; Predatory Behavior ; Reproduction ; Seasons ; Social Behavior ; Stochastic Processes ; Tanzania ; *Territoriality
    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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  • 7
    Publication Date: 2005-04-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kitayama, Kanehiro -- New York, N.Y. -- Science. 2005 Apr 29;308(5722):633; author reply 633.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Ecological Research, Kyoto University, 509-3 Hirano 2-Chome, Otsu, Shiga 520-2113, Japan. kitayama@ecology.kyoto-u.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15860609" target="_blank"〉PubMed〈/a〉
    Keywords: *Biodiversity ; *Biomass ; Climate ; *Ecosystem ; Nitrogen/analysis ; Phosphorus/analysis ; Soil/analysis ; Time ; *Trees ; Tropical Climate
    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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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-07-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Papastavrou, Vassili -- Leaper, Russell -- New York, N.Y. -- Science. 2005 Jul 1;309(5731):51-2; author reply 51-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15994510" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Conservation of Natural Resources ; *Ecosystem ; Environment ; International Cooperation ; Oceans and Seas ; Public Policy ; *Whales
    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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  • 9
    Publication Date: 2005-10-29
    Description: Global change will alter the supply of ecosystem services that are vital for human well-being. To investigate ecosystem service supply during the 21st century, we used a range of ecosystem models and scenarios of climate and land-use change to conduct a Europe-wide assessment. Large changes in climate and land use typically resulted in large changes in ecosystem service supply. Some of these trends may be positive (for example, increases in forest area and productivity) or offer opportunities (for example, "surplus land" for agricultural extensification and bioenergy production). However, many changes increase vulnerability as a result of a decreasing supply of ecosystem services (for example, declining soil fertility, declining water availability, increasing risk of forest fires), especially in the Mediterranean and mountain regions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schroter, Dagmar -- Cramer, Wolfgang -- Leemans, Rik -- Prentice, I Colin -- Araujo, Miguel B -- Arnell, Nigel W -- Bondeau, Alberte -- Bugmann, Harald -- Carter, Timothy R -- Gracia, Carlos A -- de la Vega-Leinert, Anne C -- Erhard, Markus -- Ewert, Frank -- Glendining, Margaret -- House, Joanna I -- Kankaanpaa, Susanna -- Klein, Richard J T -- Lavorel, Sandra -- Lindner, Marcus -- Metzger, Marc J -- Meyer, Jeannette -- Mitchell, Timothy D -- Reginster, Isabelle -- Rounsevell, Mark -- Sabate, Santi -- Sitch, Stephen -- Smith, Ben -- Smith, Jo -- Smith, Pete -- Sykes, Martin T -- Thonicke, Kirsten -- Thuiller, Wilfried -- Tuck, Gill -- Zaehle, Sonke -- Zierl, Barbel -- New York, N.Y. -- Science. 2005 Nov 25;310(5752):1333-7. Epub 2005 Oct 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Potsdam Institute for Climate Impact Research, 14473 Potsdam, Germany. dagmar.schroeter@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16254151" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Biodiversity ; Carbon ; Climate ; Conservation of Natural Resources ; Crops, Agricultural ; *Ecosystem ; Environment ; Europe ; Greenhouse Effect ; Humans ; Models, Statistical ; Models, Theoretical ; Socioeconomic Factors ; Trees/growth & development ; Urban Population ; Water Supply ; Wood
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2005-12-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Krajick, Kevin -- New York, N.Y. -- Science. 2005 Dec 2;310(5753):1410-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16322433" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biodiversity ; *Conservation of Natural Resources ; *Ecosystem ; Geography ; Humans ; *Pest Control
    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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