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Predation Risks of Bird Nests in the Fragmented Suburban Landscape
Suvorov, Petr
Human activities, which permanently change the landscape, can bring risks, which negatively affect bird population, for instance nest predation, which is increased mostly in suburban zones due to high density of generalist predators. Urban landscape is attractive for them mainly due to increased heterogeneity, caused mostly by anthropogenic fragmentation and increased portion of edge habitat. Multiple accesses to more resources at once attract nesting birds to nest in these habitats. If they intentionally nest in the site, where their reproduction success is lower due to a strong predation pressure, they are lured into so- called ecological trap. Especially in suburban, highly fragmented landscape frequent changes happen. If the birds cannot adapt to them in a short period, they can be threatened by a risk of the ecological trap even more. In the studies (I) and (II) we focused on a research of existing studies about ecological traps. Whereas study (I) summarized current knowledge of the concept of ecological trap in literature, study (II) surveyed, whether the appearance of this phenomenon was linked to particular selected features. Ecological traps appeared more in the opened habitats, probably due to more frequent changes in such stands. They were mainly linked to the presence of exotic species...
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Predation Risks of Bird Nests in the Fragmented Suburban Landscape
Suvorov, Petr
Human activities, which permanently change the landscape, can bring risks, which negatively affect bird population, for instance nest predation, which is increased mostly in suburban zones due to high density of generalist predators. Urban landscape is attractive for them mainly due to increased heterogeneity, caused mostly by anthropogenic fragmentation and increased portion of edge habitat. Multiple accesses to more resources at once attract nesting birds to nest in these habitats. If they intentionally nest in the site, where their reproduction success is lower due to a strong predation pressure, they are lured into so- called ecological trap. Especially in suburban, highly fragmented landscape frequent changes happen. If the birds cannot adapt to them in a short period, they can be threatened by a risk of the ecological trap even more. In the studies (I) and (II) we focused on a research of existing studies about ecological traps. Whereas study (I) summarized current knowledge of the concept of ecological trap in literature, study (II) surveyed, whether the appearance of this phenomenon was linked to particular selected features. Ecological traps appeared more in the opened habitats, probably due to more frequent changes in such stands. They were mainly linked to the presence of exotic species...
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