Bird abundance and diversity along an urban-rural gradient: a comparative study between two cities on different continents
Article Abstract:
Avian species and their abundance were compared in two cities, Quebec, Canada and Rennes, France to determine the wildlife responses in urban settings. Results reveal that diversity is inversely proportional to the rate of urbanization. The breeding densities of birds commonly found in the two cities were similar. Birds in urbanized areas can be divided into the omnivorous group, which is well suited to living in the cities, and species that are able to find resources in the urban setting they would normally exploit in the wild.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1998
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Influence of gambel oak on breeding birds in ponderosa pine forests of northern Arizona
Article Abstract:
Ponderosa pine, Pinus ponderosa, stands with or without associated gambel oak, Quercus gambelii, were compared in terms of the attributes of breeding communities of birds in these types of forest covers. Pine-oak stands have significantly higher overall bird diversity although species evenness, total bird abundance and annual turnover are comparable for both pine and pine-oak stands. The implications of these findings on nature conservation are discussed.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1998
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Spatial extent of human-intrusion effects on subalpine bird distributions
Article Abstract:
The distance at which low levels of human intrusion affect bird distributions is still unclear. To assess whether low levels of intrusion altered bird distributions, changes in bird abundances were test in Wyoming subalpine forests. Intrusions were found not to displace birds during most years, although abundances for Mountain Chickadee, American Robin and Hermit Thrush were lower within intruded sites.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1999
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