气候变化领域集成服务门户(CCPortal): Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park

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DOI	10.1002/tafs.10460
	Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park
	Childress, Evan S.; Demarest, E. David; Wofford, John E. B.; Hitt, Nathaniel P.; Letcher, Benjamin H.
发表日期	2024
ISSN	0002-8487
EISSN	1548-8659
起始页码	153
结束页码	2
卷号	153 期号:2
英文摘要	Objective: Landscape context structures fish abundance and dynamics, and understanding trends in fish abundance across the landscape is often prerequisite for effective conservation. In this study, we evaluated the status and trends of Brook Trout Salvelinus fontinalis in Shenandoah National Park to understand how these are structured across bedrock geology, elevation, and stream size. Methods: We used long-term monitoring data from 94 sites in Shenandoah National Park to evaluate trends in Brook Trout abundance over a 27-year period (1996-2022) and assess the importance of local environmental covariates using a hierarchical Bayesian N-mixture model based on depletion sampling. Focal covariates were chosen for their demonstrated importance in structuring fish populations in Shenandoah National Park and elsewhere. Bedrock geology controls sensitivity to acid deposition, watershed area is related to stream habitat features such as complexity and flow variability, and elevation creates gradients in temperature. Result: Models revealed significant decreases in adult Brook Trout abundance over time (95% credible intervals < 0) for 31 of 94 sites (33%), and at least three sites exhibited apparent extirpations over the study period. Estimated Brook Trout abundance declined by 50% or more in approximately 70% of streams across the park over the study period. Sites with the warmest water temperatures exhibited the fastest declines in abundance. However, large watersheds on poorly buffered bedrock exhibited significant gains in abundance over time, suggesting some recovery from acid deposition due to improvements in air quality. Conclusion: Our analysis revealed large and divergent changes in Brook Trout abundance over recent decades and suggests the importance of local water temperature and acid sensitivity as probable causal mechanisms. These results highlight the importance of considering local factors when evaluating long-term trends in stream fish populations. Results of this study can assist the development of targeted conservation actions within Shenandoah National Park and elsewhere.
英文关键词	acid deposition; Brook Trout; climate change; population trends
语种	英语
WOS研究方向	Fisheries
WOS类目	Fisheries
WOS记录号	WOS:001174300800001
来源期刊	TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302373
作者单位	United States Department of the Interior; United States Department of the Interior; United States Department of the Interior; United States Geological Survey; United States Department of the Interior; United States Geological Survey
推荐引用方式 GB/T 7714	Childress, Evan S.,Demarest, E. David,Wofford, John E. B.,et al. Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park[J],2024,153(2).
APA	Childress, Evan S.,Demarest, E. David,Wofford, John E. B.,Hitt, Nathaniel P.,&Letcher, Benjamin H..(2024).Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park.TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY,153(2).
MLA	Childress, Evan S.,et al."Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park".TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY 153.2(2024).