Construction of man-made objects such as roads and bridges can influence wildlife presence and abundance. We investtigated waterbirds, songbirds, anurans, turtles, small mammals, and furbearers along the Ohio River, W...Construction of man-made objects such as roads and bridges can influence wildlife presence and abundance. We investtigated waterbirds, songbirds, anurans, turtles, small mammals, and furbearers along the Ohio River, WV, at a new bridge crossing, a 45-year old bridge, and 1 or 2 islands with no bridge and at 3 distances from the bridge or center point at each site (0 m,100 m, and300 m). We sampled 19 waterbird, 60 songbird, 7 anuran, 5 turtle, 9 small mammal, and 4 furbearer species. Great blue heron (Ardea herodias) abundances were greater at the site with no bridge. Songbird composition differed among sites and between transects under and away from the bridge with higher abundances or association of rock pigeon (Columba livia) and cliff swallow (Petrochelidon pyrrhonota) under the bridges and lower abundances ofCarolinawren (Thryothorus ludovicianus) and common yellowthroat (Geothlypis trichas) under the bridges. Total small mammal abundance, diversity, and richness were lower under the new bridge compared to other sites and distances. We conclude that overall the new bridge is causing minimal relative abundance impacts to wildlife. However, great blue heron abundance may be altered due to noise and activity from the presence of the bridge and minor short-term impacts to some songbirds and small mammals directly under the bridge in the form of habitat conversion, fragmentation, and loss due to removal of vegetation is apparent.展开更多
为摸清中巴喀喇昆仑公路（简称中巴公路）30年运营对两侧植被的影响范围与程度、公路干扰区域（取弃土场、施工便道等）处植被自然恢复能力，采用样线法和样方法于2009年9月20日～28日、2010年9月8日～15日和2011年9月22日～27日对中巴...为摸清中巴喀喇昆仑公路（简称中巴公路）30年运营对两侧植被的影响范围与程度、公路干扰区域（取弃土场、施工便道等）处植被自然恢复能力，采用样线法和样方法于2009年9月20日～28日、2010年9月8日～15日和2011年9月22日～27日对中巴公路雷克特桥至红其拉甫段（即 K470＋500～K811＋343段）两侧200 m 范围内的各种植被类型及工程占地干扰区域进行了调查和实测。结果显示：公路两侧0～1 m 范围内（即土质边沟处）的物种丰富度、盖度均显著高于99～100 m（自然背景）处，且生物量、多样性指数、优势度指数和均匀度指数均有高于其他距离的趋势；公路路侧干扰样方在外貌、结构组成上已与天然背景样方的植物群落无明显的不同，但植物群落盖度、种类组成、植株高度，随着植被类型的不同与天然群落稍有差别。本研究为正在建设中的中巴公路改扩建工程的生态排水沟建设、植被恢复技术策略（以自然恢复为主、人工恢复为辅）的制定提供了理论依据。展开更多
文摘Construction of man-made objects such as roads and bridges can influence wildlife presence and abundance. We investtigated waterbirds, songbirds, anurans, turtles, small mammals, and furbearers along the Ohio River, WV, at a new bridge crossing, a 45-year old bridge, and 1 or 2 islands with no bridge and at 3 distances from the bridge or center point at each site (0 m,100 m, and300 m). We sampled 19 waterbird, 60 songbird, 7 anuran, 5 turtle, 9 small mammal, and 4 furbearer species. Great blue heron (Ardea herodias) abundances were greater at the site with no bridge. Songbird composition differed among sites and between transects under and away from the bridge with higher abundances or association of rock pigeon (Columba livia) and cliff swallow (Petrochelidon pyrrhonota) under the bridges and lower abundances ofCarolinawren (Thryothorus ludovicianus) and common yellowthroat (Geothlypis trichas) under the bridges. Total small mammal abundance, diversity, and richness were lower under the new bridge compared to other sites and distances. We conclude that overall the new bridge is causing minimal relative abundance impacts to wildlife. However, great blue heron abundance may be altered due to noise and activity from the presence of the bridge and minor short-term impacts to some songbirds and small mammals directly under the bridge in the form of habitat conversion, fragmentation, and loss due to removal of vegetation is apparent.
文摘为摸清中巴喀喇昆仑公路（简称中巴公路）30年运营对两侧植被的影响范围与程度、公路干扰区域（取弃土场、施工便道等）处植被自然恢复能力，采用样线法和样方法于2009年9月20日～28日、2010年9月8日～15日和2011年9月22日～27日对中巴公路雷克特桥至红其拉甫段（即 K470＋500～K811＋343段）两侧200 m 范围内的各种植被类型及工程占地干扰区域进行了调查和实测。结果显示：公路两侧0～1 m 范围内（即土质边沟处）的物种丰富度、盖度均显著高于99～100 m（自然背景）处，且生物量、多样性指数、优势度指数和均匀度指数均有高于其他距离的趋势；公路路侧干扰样方在外貌、结构组成上已与天然背景样方的植物群落无明显的不同，但植物群落盖度、种类组成、植株高度，随着植被类型的不同与天然群落稍有差别。本研究为正在建设中的中巴公路改扩建工程的生态排水沟建设、植被恢复技术策略（以自然恢复为主、人工恢复为辅）的制定提供了理论依据。
