Riparian corridors enhance movement of a forest specialist bird in fragmented tropical forest
Riparian corridors enhance movement of a forest specialist bird in fragmented tropical forest
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DOI：
10.1073/pnas.0803530105
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发表时间：
2008-12-16
影响因子：
11.1
通讯作者：
Clair, Colleen Cassady St.
中科院分区：
文献类型：
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作者：
Gillies, Cameron S.;Clair, Colleen Cassady St.
河岸走廊和栅栏被假设为增加森林动物在破碎化景观中的持久性，通过促进合适的栖息地斑块之间的运动。这一功能对森林鸟类可能至关重要，因为森林鸟类在破碎的栖息地中急剧减少。不幸的是，走廊使用的直接证据一直难以收集景观尺度，这限制了保护规划中的走廊的支持。使用遥测和手持GPS单元，我们研究了移动的森林鸟类的领土个人的禁止antshrikes（Thamnophilus doliatus，森林专家）和棕颈弗伦斯（Campylorhynchus rufinucha，森林通才）0.7-1.9公里，从他们的领土在高度分散的热带干燥森林的哥斯达黎加。在每个易位，直接干预的栖息地包括3个治疗：森林河岸走廊，线性生活围栏，或开放的牧场。蚁返回更快，更大的成功，在河岸走廊相对于牧场治疗。这一物种也更直接地在河岸走廊的治疗，绕道使用森林的路线，在其他2个治疗，并没有使用栅栏，即使他们直接导致他们的家园领土。相比之下，弗伦斯返回时更倾向于使用栅栏，并且返回时间和成功率在3个处理中相当。这两个物种穿越更少的差距，在河岸走廊治疗比围栏或牧场治疗的树木覆盖。我们的结论是，蚁，这可能是其他森林专家的代表，使用森林走廊在这一景观中的运动和栅栏避免运动管道。
Riparian corridors and fencerows are hypothesized to increase the persistence of forest animals in fragmented landscapes by facilitating movement among suitable habitat patches. This function may be critically important for forest birds, which have declined dramatically in fragmented habitats. Unfortunately, direct evidence of corridor use has been difficult to collect at landscape scales and this limits support for corridors in conservation planning. Using telemetry and handheld GPS units, we examined the movement of forest birds by translocating territorial individuals of barred antshrikes (Thamnophilus doliatus; a forest specialist) and rufous-naped wrens (Campylorhynchus rufinucha; a forest generalist) 0.7-1.9 km from their territories in the highly fragmented tropical dry forest of Costa Rica. In each translocation, the directly intervening habitat comprised 1 of 3 treatments: forested riparian corridor, linear living fencerow, or open pasture. Antshrikes returned faster and with greater success in riparian corridors relative to pasture treatments. This species also traveled more directly in riparian corridor treatments, detoured to use forested routes in the other 2 treatments, and did not use fencerows even when they led directly to their home territories. By contrast, wrens were more likely to use fencerows when returning, and return time and success were equivalent among the 3 treatments. Both species crossed fewer gaps in tree cover during riparian corridor treatments than in fencerow or pasture treatments. We conclude that antshrikes, which may be representative of other forest specialists, use forested corridors for movement in this landscape and that fencerows are avoided as movement conduits.