Biogeographical comparison of winter bird assemblages in urban environments in Finland

  title={Biogeographical comparison of winter bird assemblages in urban environments in Finland},
  author={J. Jokim{\"a}ki and J. Suhonen and Kimmo Inki and S. Jokinen},
  journal={Journal of Biogeography},
We studied biogeographical variation of urban bird assemblages in Finland. Winter birds were censused by single-visit study plot method from thirty-one centres of villages or towns along 950 km latitudinal extent. A total twenty-eight bird species was observed and the average density was 61.2 ind./10 ha. The number of dominant species in study areas varied between two and seven and their proportion of the whole assemblage was over 70%. Species richness, but not the density of birds, decreased… Expand
Winter bird communities in urban habitats: a comparative study between central and northern Europe
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It is concluded that differences between rural and urban areas in terms of winter conditions and the availability of resources are reflected in different bird communities in the two environments. Expand
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In Turin few bird species intensively used highly urban areas, but most species made little use of the historical centre and the modern part of the city, and occupied habitats with vegetation including a patchy mosaic of meadows, plantations or semi‐natural woods. Expand
Urbanization and Stability of a Bird Community in Winter
Abstract: The main objective of this study was to analyze between-winter stability of bird communities along latitudinal (950 km) and urban gradients (from small village to towns) in Finland. BirdsExpand
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The estimated number of breeding bird species decreased with urbanization, and the highest species richness was found in the countryside and the lowest in the large city center, supporting the widely accepted hypothesis that moderate disturbance will increase biotic diversity. Expand
Bird communities and the structure of urban habitats
Overall, available habitat and food in highly urbanized environments strongly favour the few cavity-nesting, ground-feeding graminivorous or omnivorous bird species that have already come to dominate. Expand
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Quantitative Composition of the Urban Bird Community in Tornio, Northern Finland
The urban breeding bird community of Tornio, near the Arctic Circle, is as dense as in many, though not all, Central European towns and cities. The urban parts of the town support 65–76 pairs/10 ha.Expand
Fluctuations of tits (Paridae) in Denmark and their relations to winter food and climate
Fluctuations in the breeding populations of tits (Paridae) were studied in North Zealand, Denmark, in 1964-1981 on plots with a surplus of nestboxes. Average breeding densities in pairs per 10 haExpand
Magpie Pica pica predation on Blackbird Turdus merula nests in urban areas
The results from the present study suggest that Blackbird populations in urban parkland would be unlikely to maintain themselves. Expand
Winter mortality and food supply in tits Parus spp.
It is concluded that in colour-banded populations of willow tits Parus montanus and crested tits P. cristatus, food abundance is crucial to winter survival, which limits the size of the breeding population. Expand
The findings strongly suggest that on a broad scale the winter ranges of a large number of passerines are limited by energy expen- ditures necessary to compensate for colder ambient temperatures. Expand
Latitudinal gradients in species diversity: the search for the primary cause
Hypotheses that attempt to explain latitudinal gradients in species diversity are reviewed and include explanations assuming different degrees of competition, mutualism, predation, epiphyte load, epidemics, biotic spatial heterogeneity, host diversity, population size, niche width, population growth rate, environmental harshness, and patchiness at different latitudes. Expand
The Ecology of Urban Habitats
  • O. Gilbert
  • Environmental Science
  • Springer Netherlands
  • 1991
Preface.- 1 Introduction.- 2 Characteristics of urban flora and fauna.- 2.1 Proliferation of introduced species.- 2.2 Severe disturbance.- 2.3 Increased opportunities for dispersal.- 2.4 HabitatExpand