Weathering the storm: Improving the availability and stability of artificial shelters for hellbender salamanders

Weathering the storm: Improving the availability and stability of artificial shelters for hellbender salamanders
复制标题

经受住风暴:提高地狱蝾螈人工庇护所的可用性和稳定性

DOI:
10.1002/rra.3722
复制
发表时间:
2020
影响因子:
2.2
通讯作者:
Hopkins, William A.
Hopkins, William A.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Button, Sky T.;Hallagan, John J.;Bodinof Jachowski, Catherine M.;Case, Brian F.;Groffen, Jordy;Hopkins, William A.

文献摘要

参考文献

被引文献

相似文献

人工庇护所作为研究濒临灭绝的蝾螈的工具显示出巨大的前景。然而,它们在实践中尚未完全发挥其全部效用,因为在最初的试验中,避难所经常被沉积物堵塞或在高流量排放事件中被移动。为了确定是否可以克服这些挑战,我们于 2013 年至 2018 年在田纳西河上游流域的 10 个溪流和 3 条河流部署了 438 个两种不同设计的人工避难所。我们在调查期间记录了避难所入口的可用性,并记录了哪些避难所在高排放事件后被拆除。我们评估了两个假设:(a) 庇护所可用性由庇护所安置和维护频率驱动,(b) 庇护所稳定性由庇护所设计和庇护所安置驱动。避难所的平均可用时间为 78.6%(范围 = 0–100%),并且 88.6%(438 个中的 388 个)避难所在所有高排放事件中都保持稳定。通过至少每 40 天清除一次避难所入口的沉积物(更常见于淤积较高的受损河段)以及在大风暴事件后,将避难所安置在 ≥5 块巨石的 1 m 范围内,并调整避难所的入口不直接面向下游,最大限度地提高避难所的可用性。我们最初的避难所设计的避难所稳定性为 77.5%(218 个避难所中的 169 个),但对于带有凹进式盖子的较重(约 40 公斤 vs. 约 25 公斤)避难所,以及在有大量大石块的区域,稳定性接近 100%(220 中的 219 个)。我们的研究结果表明,通过改进设计和精心安置,人工庇护所可以作为监测淤积程度适中的河段的危险工具的宝贵工具。
Artificial shelters show considerable promise as tools for studying imperiled hellbender salamanders. Their full utility has not yet been fully reached in practice, however, because during initial trials shelters often became blocked by sediment or dislodged during high stream discharge events. To determine whether these challenges could be overcome, we deployed 438 artificial shelters of two different designs across 10 stream reaches and three rivers in the upper Tennessee River Drainage in 2013–2018. We recorded shelter entrance availability during surveys, and recorded which shelters became dislodged following high discharge events. We evaluated two hypotheses: (a) shelter availability was driven by shelter placement and maintenance frequency and (b) shelter stability was driven by shelter design and shelter placement. Shelters were available 78.6% of the time on average (range = 0–100%), and 88.6% (388 of 438) of shelters were stable across all high discharge events. Shelter availability was maximized by clearing sediment from shelter entrances at least once every 40 days (more often in impaired reaches with high siltation) and after large storm events, situating the shelter within 1 m of ≥5 boulders, and orienting shelters such that their entrances do not face directly downstream. Shelter stability with our initial shelter design was 77.5% (169 of 218), but approached 100% (219 of 220) for heavier (~40 kg vs. ~25 kg) shelters with recessed lids, and in reaches with abundant large boulders. Our findings demonstrate that with an improved design and careful placement, artificial shelters can serve as valuable tools for monitoring hellbenders in reaches with modest siltation.
DOI: 10.1111/j.1472-4642.2007.00394.x
发表时间: 2007-11-01
影响因子: 4.6
作者:
Kriger, Kerry M.;Hero, Jean-Marc
通讯作者: Hero, Jean-Marc
DOI: --
发表时间: 1976
期刊:
影响因子: --
作者:
D. Beffa
通讯作者: D. Beffa
当前的土地利用并不能很好地预测地狱怪的发生:为什么假设在预测数据缺乏的物种分布时很重要
DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
Catherine M. Bodinof Jachowski;J. Millspaugh;W. Hopkins
通讯作者: W. Hopkins
北卡罗来纳州西部的地狱蝾螈对巢箱的使用
DOI: --
发表时间: 2014
期刊:
影响因子: --
作者:
Arianne F. Messerman
通讯作者: Arianne F. Messerman
评估人工庇护所阵列作为一种微创监测工具对阿勒加隐鳃金龟的影响
DOI: --
发表时间: 2020
期刊:
影响因子: --
作者:
C. Jachowski;Beth E. Ross;W. Hopkins
通讯作者: W. Hopkins