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  • Solved A new disease has annihilating amphibian populations . . .
    A new disease has annihilating amphibian populations at unprecedented levels Researchers has been trying to develop some treatment that can counteract the disease and save some of the amphibian populations To test which of two potential solutions is more effective, they take a sample of frogs and randomly divide them into two groups
  • What Amphibians Can Tell Us About Water Quality
    A 2004 assessment found that nearly one-third of the more than 8,000 amphibian species are at risk of extinction, representing 1,856 species Nearly 168 species are believed to have already gone extinct, while at least 2,469 species are actively declining In the United States, amphibian populations are declining at an average rate of 3 79% per
  • 15. 3: Amphibian Diversity - Biology LibreTexts
    Amphibia comprises an estimated 6,770 extant species that inhabit tropical and temperate regions around the world All living species are classified in the subclass Lissamphibia ("smooth-amphibian"), which is divided into three clades: Urodela (“tailed”), the salamanders; Anura (“tail-less”), the frogs; and Apoda (“legless ones”), the caecilians
  • Amphibian behavioral diversity offers insights into . . .
    Amphibians are a diverse class of vertebrates comprising more than 8000 extant species and classified into three orders (Figure 1): gymnophiona (caecilians); urodela (salamanders and newts); and anura (frogs and toads) Hundreds of novel species are identified each year; more than a quarter of known amphibians have been described in just the
  • The Most Numerous Organisms in the World | Britannica
    The most numerous species of amphibian is almost certainly a frog Exactly which species of the slick-skinned critters is most populous remains unknown The order Anura, which comprises frogs and toads, contains some 5,500 species, but many are rare or
  • Overview of chytrid emergence and impacts on amphibians
    1 Introduction Declining amphibian populations have been a concern of scientists ever since the first World Congress of Herpetology in 1988 There scientists realized many amphibians that had previously been common, abundant or reliably encountered had disappeared for no obvious reason, often from remote or protected areas []
  • Global biodiversity - Wikipedia
    Insects make up the vast majority of animal species [14]Chapman, 2005 and 2009 [9] has attempted to compile perhaps the most comprehensive recent statistics on numbers of extant species, drawing on a range of published and unpublished sources, and has come up with a figure of approximately 1 9 million estimated described taxa, as against possibly a total of between 11 and 12 million





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