Potential roadside biases due to habitat changes along Breeding Bird Survey routes
Potential roadside biases due to habitat changes along Breeding Bird Survey routes
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由于繁殖鸟类调查路线沿线的栖息地变化而导致潜在的路边偏差
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
Jacqueline T. Scallan
中科院分区：
文献类型：
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作者：
C. Keller;Jacqueline T. Scallan
繁殖鸟类调查(BBS)是沿着路边路线进行的，以便能够对大片地理区域进行调查。然而，仅从路边抽样人口的潜在偏见几乎没有得到关注。我们对20世纪60年代中期和80年代末拍摄的BBS路线进行了航空摄影，以评估沿路边发生的栖息地变化是否也在周围地区发生，以及沿路边遇到栖息地的频率是否与非路线相似。我们检查了马里兰州的28条路线和俄亥俄州的25条路线，并将路边区域定义为距离道路200米以内，非路线区域定义为距离道路200-1600米。大多数发生在BBS路边的栖息地变化也发生在非路线地区。然而，在马里兰州，沿路城市覆盖率的增加明显更大，那里的农田城市化是主要的栖息地变化。俄亥俄州沿途城市覆盖率的小幅增长并不明显。在这两个州，BBS路边独栋住宅的建设规模更大。在俄亥俄州，栖息地变化最大的是退耕还林，沿途的变化并不明显。与城市化相关的变化更倾向于路边，而不是重新植树造林。在一个时间段内，路边地区的森林较少，农业和城市覆盖类型较多，而不是路线外。
Breeding Bird Surveys (BBS) are conducted along roadside routes to enable a large geographic area to be surveyed. Yet the potential biases of sampling populations only from roadsides have received little attention. We sampled aerial photography of BBS routes taken in the mid-1960s and late-1980s to evaluate whether habitat changes that occurred along roadsides were also occurring in the surrounding area, and whether the frequency of habitats encountered along roadsides were similar to that off-route. We examined 28 routes in Maryland and 25 routes in Ohio, and defined roadside area as within 200 m of the road, and off-route as 200-1,600 m from the road. Most habitat changes that occurred along BBS roadsides also were occurring in the off-route areas. However, increases in urban cover were significantly greater along the road in Maryland where urbanization of farmland was the predominant habitat change. The small increase in urban cover in Ohio was not significantly greater along the road. Construction of single family homes was greater along BBS roadsides in both states. In Ohio, the greatest change in habitat was the conversion of farmland back to forest, which was not significantly greater along the road. Changes associated with urbanization were more biased towards roadsides than the reforestation of farmland. Within one time period, roadside areas had less forest and more agricultural and urban cover types than occurred off-route.