(Big eared townsend bat, Wikipedia, image in public domain)
Studies have shown that some wildlife species just do not
adapt to urbanized areas. Marchetti (2006) and Ritzi (2004) found that there
are more native fish species the farther away from urban areas, and Ordenana
(2010) showed that many carnivore species decline nearer to cities. A study
just published in Urban Naturalist (No.
8, 2015) supports these observations and concluded that while a few bat species
can survive in urban zones, there are many more that just don’t go there. In
their paper entitled Bat Species
Diversity at an Urban-Rural Interface: Dominance by One Species in an Urban
Area, Damm, Sparks and Whitaker (2015) determine that while Northern Long-eared Bats
were caught in mist nets in urban Indianopolis, Indiana; that others include
Tri-colored Bats and Little Brown Bats were negatively correlated the closer they sampled next to the
urban core. They conclude that bat-species richness may be connected to
specific roosting and foraging requirements, and the possible negative influence
of abundant roadways.
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