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英文字典中文字典相关资料:


  • Evolution: Extinction: A Modern Mass Extinction? - PBS
    Of about 6 to 10 million currently existing species, we have still only identified 1 million; we know more about vertebrate species than we do about plants and insects
  • Deforestation and Forest Degradation | Threats | WWF
    When species lose their forest homes, they are often unable to survive in the fragments of forested land left behind They become more accessible to hunters and poachers, their numbers dwindle, and some eventually go extinct Even localized deforestation can result in extinctions as many unique species exist in small, isolated locations
  • Lists of mammals by population - Wikipedia
    List of cetacean species with population estimates – dolphins, porpoises, whales List of odd-toed ungulates by population – equines, rhinoceros, tapirs List of carnivorans by population – domestic and wild feliformians and caniformians, pinnipeds, ursid species, musteloidea species, herpestidae species, etc
  • Scientists predict a new mass extinction that will wipe out . . .
    This extinction primarily decimated marine species, since life on land was scarce during this period Late Devonian Extinction (Around 360 million years ago) The Late Devonian extinction left a significant impact, with a 75% reduction in species This extinction event extensively affected marine life, particularly reef-building organisms and fish
  • 5. 5 Preserving Biodiversity | Environmental Biology
    The background extinction rate is estimated to be about 1 per million species years (E MSY) One “species year” is one species in existence for one year One million species years could be one species persisting for one million years, or a million species persisting for one year
  • Chart: Which Species Dominate Which Habitat? | Statista
    Overall, the world is home to an estimated number of 8 8 million species with around 1 7 million of them already being identified and described
  • How many named species are valid? - PNAS
    Thus, substantial inflation of total species counts should be expected everywhere in the literature on biodiversity If only 30% of named species are illusions created by unsettled taxonomy, then instead of 5–15 million living species (9, 10), there may be 3 5–10 5 million





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