Flying by the river side: Survey of bat distributions and environmental contexts along a 1000-mile river corridor, Green and Colorado Rivers, USA

IF 4.6 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Diversity and Distributions Pub Date : 2024-03-27 DOI:10.1111/ddi.13842
Riley F. Bernard, Thomas A. Minckley
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Abstract

Aim

Emerging research shows how bioindicators, specifically bats, can serve as a means for monitoring conservation and management of riparian corridors for multiple taxonomic groups. To track changes in the composition or abundance of bioindicator species, researchers must attain a baseline in species presence and relative activity. We examined the spatial and temporal patterns of bat community composition and activity along a 1000-mile river corridor to determine species diversity trends by latitude and habitat.

Location

Colorado River Basin.

Methods

Here we describe the results from an acoustic bat survey conducted opportunistically on the 2019 Sesquicentennial Colorado River Exploring Expedition. This broad, 1000-mile survey provides a baseline for species distributions over a large geographic range.

Results

In total, we collected 63 nights of acoustic data over 70 days and recorded over 59,000 files equating to 45,363 caLL files (≥2 pulses). 18,490 (41% of caLL files) were identified as species (n = 19 bat species). We applied non-metric multidimensional scaling to characterize spatiotemporal patterns of activity between species, as well as compared bat activity among river features and local environmental conditions (i.e., temperature and time since sunset) using an information theoretic approach.

Conclusion

Species composition varied by physiographic region and adjacent river habitat, thus providing a quantifiable measure of determining habitat quality along this major river system and providing baseline information for using bats as bioindicators of habitat quality.

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在河边飞翔:美国绿河和科罗拉多河 1000 英里河流走廊沿岸蝙蝠分布和环境背景调查
目标新近的研究表明,生物指标(特别是蝙蝠)可以作为监测多个分类群河岸走廊保护和管理的一种手段。要跟踪生物指标物种组成或数量的变化,研究人员必须获得物种存在和相对活动的基线。我们沿一条 1000 英里长的河流走廊研究了蝙蝠群落组成和活动的时空模式,以确定不同纬度和栖息地的物种多样性趋势。这项广泛的 1000 英里调查为大地理范围内的物种分布提供了基线。结果我们总共收集了 63 个晚上的声学数据,历时 70 天,记录了 59,000 多个文件,相当于 45,363 个 caLL 文件(≥2 个脉冲)。18,490个文件(占caLL文件的41%)被确定为物种(n = 19个蝙蝠物种)。我们采用非度量多维标度来描述物种之间的时空活动模式,并利用信息论方法比较了河流特征和当地环境条件(即温度和日落时间)之间的蝙蝠活动。结论物种组成因地貌区域和邻近河流栖息地而异,从而为确定这条主要河流系统沿岸的栖息地质量提供了一个可量化的衡量标准,并为将蝙蝠用作栖息地质量的生物指标提供了基线信息。
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来源期刊
Diversity and Distributions
Diversity and Distributions 环境科学-生态学
CiteScore
8.90
自引率
4.30%
发文量
195
审稿时长
8-16 weeks
期刊介绍: Diversity and Distributions is a journal of conservation biogeography. We publish papers that deal with the application of biogeographical principles, theories, and analyses (being those concerned with the distributional dynamics of taxa and assemblages) to problems concerning the conservation of biodiversity. We no longer consider papers the sole aim of which is to describe or analyze patterns of biodiversity or to elucidate processes that generate biodiversity.
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