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首页> 外文期刊>Trends in Ecology & Evolution >Threshold responses of songbirds to forest loss and fragmentation across the Marcellus-Utica shale gas region of central Appalachia, USA
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Threshold responses of songbirds to forest loss and fragmentation across the Marcellus-Utica shale gas region of central Appalachia, USA

机译：美国阿巴拉契亚中部Marcellus-utica页岩气区的森林损失与碎片的阈值响应

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Context Since 2005, unconventional gas development has rapidly altered forests across the Marcellus-Utica shale basin in the central Appalachian region of the eastern United States, an area of high conservation value for biodiversity. Much is still unknown about ecological impacts of associated land cover change. Objectives Our goal was to identify threshold responses among bird species and habitat guilds to (1) overall forest loss and fragmentation in affected landscapes, and (2) distance from anthropogenic disturbance, both related and unrelated to shale gas. Methods We conducted 2589 bird surveys at 190 sites across this region, and quantified community-level and species-specific thresholds relating to forest cover and distance to anthropogenic disturbance, using Threshold Indicator Taxa Analysis (TITAN). Results Forest interior species decreased abruptly in abundance and frequency of occurrence above a threshold of 17.0% overall forest loss, while early successional and synanthropic species increased abruptly above 30.5-36.5% forest loss, respectively. Broad quantile intervals around responses to distance from anthropogenic disturbance suggest these were not sharp threshold responses, but more gradual or linear responses. Among forest interior species evaluated, 48.1% increased in abundance farther from shale gas development, while 55.6% of early successional and synanthropic species decreased. Conclusions We found evidence of avian threshold responses to overall forest loss and fragmentation in affected landscapes across the Marcellus-Utica shale region. Our results suggest that efforts to avoid shale gas development in regional core forests-particularly those still retaining >= 83% forest cover-can reduce negative effects on area-sensitive, forest interior dependent species.
机译：背景信息自2005年以来，非传统的天然气发展在美国东部地区阿巴拉米亚地区的Marcellus-utica页岩盆地迅速改变了森林，这是生物多样性高保值范围。关于相关土地覆盖变化的生态影响仍然不知道。目标我们的目标是识别鸟类和栖息地行会之间的阈值反应（1）受影响的景观中的整体森林损失和碎片，以及（2）与人为扰动的距离，无论是与页岩气有关。方法采用阈值指标征集分析（泰坦），我们在该地区的190个横跨该地区的190个位点进行了2589次鸟类调查，并定量了与森林覆盖和与人为扰动的距离有关的群落级和物种特异性阈值。结果森林内部物种突然降低丰富，发生频率超过17.0％的整体森林损失，而早期的继承和僵局分别突然增加森林损失30.5-36.5％。围绕从人为扰动的距离的宽分数间隔表明这些不是尖锐的阈值反应，而是逐渐逐渐或线性的反应。在评估的森林室内物种中，48.1％从页岩气体发育的丰富程度增加，而55.6％的早期继承和股权物种减少。结论我们发现禽流地损失对Marcellus-utica页岩地区受影响景观的整体森林损失和碎片的证据。我们的研究结果表明，避免区域核心森林中的页岩气体开发 - 特别是那些仍然存在的人> = 83％的森林覆盖 - 可以减少对面积敏感的森林内部依赖物种的负面影响。

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