Nonhuman city natives in decline but can be conserved

By Ashley Yeager, 18:22 PM February 11, 2014

While meadow grass and rock pigeons take the title of most cosmopolitan among plant and bird species, concrete jungles have caused big drops in species diversity overall.

Only 25 percent of native plant species and 8 percent of native bird species exist in city habitats compared with density counts of non-urban species. Land availability and cities' ages, along with other human-induced factors, best explain the species loss, scientists report February 12 in the Proceedings of the Royal Society...

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