Possible climate-induced shift of stoneflies in a southern Appalachian catchment
Possible climate-induced shift of stoneflies in a southern Appalachian catchment
复制标题
阿巴拉契亚南部流域可能由气候引起的石蝇转移
作者：
A. Sheldon
1977-1978年，我在大烟山国家公园274平方公里的集水区内，跨越海拔和溪流大小的坡度采集了石蝇(翼翅目：Perlidae)。我在2006年重复收集了2个重点物种。在此期间，区域气候使∼变暖0.72℃。石蝇对温度变化的反应模型预测上坡移动100至140米。一种数量丰富的物种异常毛端毛虫(Acroneuria Abomariis)根据距离移动的衡量标准向上移动60至250米。Logistic回归和信息标准有力地支持了上行转移。不太常见的黄原藻基于几个指标将−移动61到+105m，并且不支持回归模型。黄原虫的数据受到地貌变化和可探测性问题的困扰，不足以支持任何关于射程变化的结论。近年来，溪流的酸度已经向下移动，与观察到的异常曲线虫的上坡移动相反，这种模式支持将气温上升作为该物种活动范围限制的决定因素。异常菌的上移速率(中位数海拔+24m/十年)与其他地方动植物的变化相似。
Abstract I collected stoneflies (Plecoptera∶Perlidae) across gradients of elevation and stream size within a 274-km2 catchment in Great Smoky Mountains National Park in 1977–1978. I repeated collections of 2 focal species in 2006. Regional climate warmed ∼0.72°C during the interval. Models of stonefly responses to temperature change predicted uphill shifts of 100 to 140 m. One abundant species, Acroneuria abnormis, shifted uphill 60 to 250 m depending on the measure of range shift. Uphill shift was strongly supported by logistic regression and information criteria. The less common Eccoptura xanthenes shifted −61 to +105 m based on several metrics, and no regression model was supported. Data for E. xanthenes, confounded by landscape change and detectability issues, were inadequate to support any conclusion about range shift. Stream acidity has shifted downslope in recent years, counter to the observed uphill shift by A. abnormis, a pattern that supports increasing temperature as the determinant of range limits for this species. Rate of uphill shift by A. abnormis (median elevation, +24 m/decade) was similar to changes by plants and animals in other places.