英文字典,中文字典,查询,解释,review.php


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       


安装中文字典英文字典辞典工具!

安装中文字典英文字典辞典工具!










  • Visualizing the Biomass of All the World’s Mammals
    Data notes: To come up with the numbers above, scientists estimated the total biomass of wild mammals on Earth by manually collecting population estimates for 392 land mammal species, which make up about 6% of all wild land mammal species, and using machine learning to infer the global populations of the remaining 94% Their estimate includes
  • Ecological dynamics and coexistence patterns of wild and . . .
    Particularly in areas with extensive grazing, increasing wild species populations may result in unforeseen patterns of habitat use and species interactions for both domestic and wild animals It is therefore necessary to investigate the spatial and temporal distributional patterns of animals to understand their ecological drivers
  • Monophyletic origin of domestic bactrian camel (Camelus . . .
    The results showed two highly divergent phylogenetic clades with an average genetic distance of 2 8 ± 0 5% (the sequence divergence is 26–33 substitutions) between the domestic and wild camels, supported by high bootstrap values and Bayesian posterior probability, which suggests that the domestic and wild camels may belong to two different
  • Mammal Species of the World: A Taxonomic and Geographic . . .
    Mammal Species of the World: A Taxonomic and Geographic Reference Compiled for the Parties to the Convention on International Trade in Endangered Species of Wild Fauna and Flora to Serve as a Standard Reference to Mammalian Nomenclature, with Scientific Advice from Members of the American Society of Mammalogists and Its Checklist Committee; Robert S Hoffman, Coordinator
  • Equidae - Wikipedia
    Equidae (commonly known as the horse family) is the taxonomic family of horses and related animals, including asses, zebras, and many extinct species known only from fossils The family evolved more than 50 million years ago, in the Eocene epoch, from a small, multi-toed ungulate into larger, single-toed animals
  • Understanding how many amphibians there are | London Zoo
    I was born in the early 1980s Incredibly, over 60% of the 8,700 known amphibian species have been described in my lifetime Many of these are now close to extinction We don’t know how many amphibian species there are, but there are scientists all over the world, including myself, frantically describing species before they are lost forever
  • Biodiversity Conservation at Multiple Scales: Functional . . .
    In past decades, biodiversity was viewed largely in terms of species richness, and the ecosystems supporting these species were seen as static and predictable (Fiedler et al 1997) Conservation activities were often aimed at hot-spots rich in total species or in rare species (Noss 1987) Consequently, relatively small nature preserves


















中文字典-英文字典  2005-2009