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  • Books
  • Articles  (3)
  • Population Density  (3)
  • American Association for the Advancement of Science (AAAS)  (3)
  • 1
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    Population diversity: its extent and extinction (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-10-24
    Description: Genetically distinct populations are an important component of biodiversity. This work estimates the number of populations per area of a sample of species from literature on population differentiation and the average range area of a species from a sample of distribution maps. This yields an estimate of about 220 populations per species, or 1.1 to 6.6 billion populations globally. Assuming that population extinction is a linear function of habitat loss, approximately 1800 populations per hour (16 million annually) are being destroyed in tropical forests alone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hughes, J B -- Daily, G C -- Ehrlich, P R -- New York, N.Y. -- Science. 1997 Oct 24;278(5338):689-92.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Stanford University, Stanford, CA 94305-5020, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9381179" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Ecosystem ; *Genetics, Population ; Mathematics ; Plants ; Polymorphism, Restriction Fragment Length ; Population Density
    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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    Global mammal conservation: what must we manage? (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-07-26
    Description: We present a global conservation analysis for an entire "flagship" taxon, land mammals. A combination of rarity, anthropogenic impacts, and political endemism has put about a quarter of terrestrial mammal species, and a larger fraction of their populations, at risk of extinction. A new global database and complementarity analysis for selecting priority areas for conservation shows that approximately 11% of Earth's land surface should be managed for conservation to preserve at least 10% of terrestrial mammal geographic ranges. Different approaches, from protection (or establishment) of reserves to countryside biogeographic enhancement of human-dominated landscapes, will be required to approach this minimal goal.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ceballos, Gerardo -- Ehrlich, Paul R -- Soberon, Jorge -- Salazar, Irma -- Fay, John P -- New York, N.Y. -- Science. 2005 Jul 22;309(5734):603-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Instituto de Ecologia, UNAM, Apdo. Postal 70-275, Mexico D.F. 04510, Mexico. gceballo@miranda.ecologia.unam.mx〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16040704" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; Animals ; Biodiversity ; *Conservation of Natural Resources ; Databases, Factual ; Developed Countries ; Developing Countries ; *Ecosystem ; Environment ; Geography ; Humans ; *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
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Mammal population losses and the extinction crisis (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-04
    Description: The disappearance of populations is a prelude to species extinction. No geographically explicit estimates have been made of current population losses of major indicator taxa. Here we compare historic and present distributions of 173 declining mammal species from six continents. These species have collectively lost over 50% of their historic range area, mostly where human activities are intensive. This implies a serious loss of ecosystem services and goods. It also signals a substantial threat to species diversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ceballos, Gerardo -- Ehrlich, Paul R -- New York, N.Y. -- Science. 2002 May 3;296(5569):904-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Instituto de Ecologia, Universidad Nacional Autonoma de Mexico, Apdo, Postal 70-275, Mexico D.F. 04510, Mexico. gceballo@miranda.ecologia.unam.mx〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11988573" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Animals ; Asia, Southeastern ; Australia ; Demography ; *Ecosystem ; Europe ; Humans ; *Mammals ; North America ; Population Density ; South America
    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)
    Location Call Number Expected Availability
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