9/12/2023 0 Comments E edge pipelineLes campagnols des prés ( Microtus pennsylvanicus (Ord, 1815)) constituent l’espèce la plus répandue le long de pipelines, alors que, dans la forêt attenante, le campagnol à dos roux de Gapper ( Myodes gapperi (Vigors, 1830)), le campagnol à dos roux boréal ( Myodes rutilus (Pallas, 1779)) et la souris sylvestre ( Peromyscus maniculatus (Wagner, 1845)) sont les espèces dominantes. Nous avons tenté de déterminer quelles espèces de petits mammifères utilisent les emprises de pipeline, l’influence du rétablissement de la végétation le long de pipelines et les effets de bordure dans la forêt attenante. La mise en valeur des ressources pétrolières et gazières modifie les forêts boréales en créant des habitats pionniers et une quantité accrue de bordures. Altered small-mammal communities on and adjacent to pipelines may have implications for boreal forest management and conservation through potential changes in predator–prey dynamics and boreal food webs these implications require further study. Vegetation variables (i.e., canopy type and cover, ground cover, stem counts, and volume of downed woody material) were important predictors of small-mammal abundance in the forest, but they could not fully account for observed edge effects. Red-backed voles showed a mixed (i.e., neutral or positive) response to edge. Within the forest, irrespective of vegetation recovery on pipelines, meadow voles and deer mice increased near edges. Deer mouse abundance was greater along pipeline transects with greater vegetation recovery. Meadow voles ( Microtus pennsylvanicus (Ord, 1815)) were the most common species on pipelines, whereas adjacent forest was dominated by southern red-backed voles ( Myodes gapperi (Vigors, 1830)), northern red-backed voles ( Myodes rutilus (Pallas, 1779)), and North American deer mice ( Peromyscus maniculatus (Wagner, 1845)). We evaluated which small-mammal species used pipeline rights of way, the influence of vegetation recovery on pipelines, and edge effects in the adjacent forest. Oil and gas development alters boreal forests by creating early-successional habitat and an increased amount of edge.
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