Can roads, railways and related structures have positive effects on birds? A review

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Morelli, Federico
Beim, Michal
Jerzak, Leszek
Jones, Darryl
Tryjanowski, Piotr
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2014
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Abstract

The urbanization process affects faunal distributions and movement patterns, contributing directly to biotic homogenization and representing an important threat to biodiversity. In particular, birds, which have been well studied as indicators of anthropogenic disturbance, are especially valuable in evaluating these impacts. While the negative impact of these processes and structures, most notably road and railway networks, are now well appreciated (e.g. habitat loss, disturbance, noise, mortality by collisions, barrier effects), the potentially positive effects on wildlife are less appreciated (the number of documented negative effects of roads on animal abundance outnumbered the number of positive effects by a factor of 5). Here, were reviewed a total of 92 peer-reviewed publications for the period of 36 years between 1978 and 2014, which reported positive effects of roads and associated anthropogenic structures on birds. Our results show that roads, railways and several associated constructions, commonly implicated in the decline of biodiversity, may also have positive effects on certain bird species or communities. The main types of positive effects on birds identified were classified as: (1) roads: providing foraging habitat; reducing the predation pressures; and providing a warm surface assists in conserving metabolic energy; (2) lights of streets: prolonging diurnal activity; (3) powerlines, fences, etc. along roads: providing perches for hunting activities; and (4) bridges, pylons, tree lines along roadsides, bases of powerline pylons: providing nesting sites and cover from predators. From this review, we provide a useful tool for ecologists, road planners and other stakeholders engaged on conservation or landscape planning.

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Transportation Research Part D

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30

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Conservation and biodiversity

Urban and regional planning

Transportation, logistics and supply chains

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