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- W2904366377 abstract "Abstract Generalist species occupy a wide range of habitats and typically respond well to environmental disturbance. Highly disturbed urban areas may contain habitat that generalists can use and exploit; however, habitat use and quality of areas within urban landscapes are poorly understood. Here, we investigated habitat use of a generalist passerine, the red‐winged blackbird ( Agelaius phoeniceus ), in urban and rural grassland patches in greater metropolitan Chicago, USA . From 2012 to 2013, we conducted point counts on 30 grassland patches and searched for nests at a subset of these sites. We measured and weighed nestlings and collected fecal samples for corticosterone metabolite analysis. We found that population densities were greater in grassland patches in more rural areas, despite higher rates of nest predation and brood parasitism. We found that clutch size and number of young fledged did not differ between urban and rural areas. Average body mass and tarsus length of nestlings did not vary with urbanization, but nestlings in rural environments had significantly greater fecal corticosterone metabolites than urban nestlings. These results suggest that, even for widely successful generalist species, novel habitat can create a disconnection between habitat use and quality. The reason for this disconnection is unclear but may be related to perceived predation risk or other biotic or abiotic cues. Addressing the mechanisms behind undervaluation of habitat within urban landscapes will aid in wildlife conservation and management in novel environments." @default.
- W2904366377 created "2018-12-22" @default.
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- W2904366377 date "2018-12-01" @default.
- W2904366377 modified "2023-10-10" @default.
- W2904366377 title "Mixed effects of urbanization on density, nest survival, and nestling corticosterone of a generalist passerine" @default.
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- W2904366377 doi "https://doi.org/10.1002/ecs2.2517" @default.
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