Introduced Grey Squirrels subvert supplementary feeding of suburban wild birds
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چکیده
منابع مشابه
Relative Roles of Grey Squirrels, Supplementary Feeding, and Habitat in Shaping Urban Bird Assemblages
Non-native species are frequently considered to influence urban assemblages. The grey squirrel Sciurus carolinensis is one such species that is widespread in the UK and is starting to spread across Europe; it predates birds' nests and can compete with birds for supplementary food. Using distance sampling across the urbanisation intensity gradient in Sheffield (UK) we test whether urban grey squ...
متن کاملCompetition between Eurasian red and introduced Eastern grey squirrels: the energetic significance of body-mass differences.
Daily energy expenditure (DEE) was measured in sympatric populations of red and grey squirrels using the doubly labelled water technique. Grey squirrels had significantly higher DEEs than red squirrels. However, the difference between the species was not separable from the effects of body mass on DEE. The DEEs of both species were in accordance with published allometric predictions incorporatin...
متن کاملAlien species and interspecific competition: effects of introduced eastern grey squirrels on red squirrel population dynamics
1. Throughout much of Britain, Ireland and north Italy, red squirrels ( Sciurus vulgaris L.) have been replaced by alien grey squirrels ( S. carolinensis Gmelin) introduced from North America. We have studied squirrels in two mixed woodlands in north Italy and two conifer forests in north England. In each country, one site was occupied by red squirrels and one site by both species. 2. We have p...
متن کاملA Test of Interspecific Effects of Introduced Eastern Grey Squirrels, Sciurus carolinensis, on Douglas’s Squirrels, Tamiasciurus douglasii, in Vancouver, British Columbia
In western Canada, Eastern Grey Squirrels (Sciurus carolinensis) were introduced to Stanley Park in the city of Vancouver, British Columbia, shortly before 1914. The three to four pairs of introduced Eastern Grey Squirrels came from eastern Canada (Robinson and Cowan 1954). In the early 1980s, Eastern Grey Squirrels colonized the rest of the city of Vancouver, including many of its urban parks....
متن کاملCoccidian parasites of red squirrels (Sciurus vulgaris) and grey squirrels (Sciurus carolinensis) in England
Coccidian parasites of red squirrels (Sciurus vulgaris) and grey squirrels (Sciurus carolinensis) in England S.J. Ball, P. Daszak, A.W. Sainsbury & K.R. Snow To cite this article: S.J. Ball, P. Daszak, A.W. Sainsbury & K.R. Snow (2014) Coccidian parasites of red squirrels (Sciurus vulgaris) and grey squirrels (Sciurus carolinensis) in England, Journal of Natural History, 48:19-20, 1225-1230, DO...
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ژورنال
عنوان ژورنال: Landscape and Urban Planning
سال: 2018
ISSN: 0169-2046
DOI: 10.1016/j.landurbplan.2018.04.004