NDLI: Avian population dynamics and human induced change in an urban environment

Content Provider	Springer Nature Link
Author	James, Philip rman, David Clarke, Jeff J.
Copyright Year	2010
Abstract	The predominantly urban boroughs of Warrington and Halton straddle the river Mersey in northwest England. Since the 1970s there has been a major change in land-use associated with both innovative town design and the decline of manufacturing and chemical industries in the boroughs. Also, co-ordinated programmes have directly addressed air and water pollution. The breeding birds of the two boroughs were surveyed in 1978–84 and 2004–06 as part of the bird atlases of Cheshire and Wirral, based on tetrads (2 × 2 km squares). We divided the breeding species into eight guilds based on broad ecological characteristics of habitat or food, omitting the generalists and colonial species, and compared the change between our two atlases in the number of occupied tetrads in Halton and Warrington and in the rest of the county. Four of our eight guilds have fared significantly better within our study area: waterbirds (24 species), those feeding on invertebrates (16 species), woodland specialists (21 species) and the two species that decorate their nests with lichens. The remaining four guilds showed no difference between Halton and Warrington and the rest of Cheshire and Wirral: raptors (5 species) have increased throughout, while breeding waders (7 species), farmland seedeaters (7 species) and aerial insectivores (5 species) have declined throughout. We interpret these results in relation to improved quality of water and air and changing patterns of land-use in the urban greenspace, especially an increase in woodland cover and connectivity.
Starting Page	499
Ending Page	515
Page Count	17
File Format	PDF
ISSN	10838155
Journal	Urban Ecosystems
Volume Number	13
Issue Number	4
e-ISSN	15731642
Language	English
Publisher	Springer US
Publisher Date	2010-07-08
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Urban birds Greenspace Environmental quality Urban design Nature Conservation Ecology Environmental Management Urban Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Urban Studies

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