气候变化领域集成服务门户(CCPortal): Go with the flow: Impacts of high and low flow conditions on freshwater mussel assemblages and distribution

CCPortal

DOI	10.1371/journal.pone.0296861
	Go with the flow: Impacts of high and low flow conditions on freshwater mussel assemblages and distribution
	Cushway, Kiara C.; Harris, Aubrey E.; Piercy, Candice D.; Mitchell, Zachary A.; Schwalb, Astrid N.
发表日期	2024
ISSN	1932-6203
起始页码	19
结束页码	2
卷号	19 期号:2
英文摘要	Understanding the drivers of distribution and assemblage composition of aquatic organisms is an important aspect of management and conservation, especially in freshwater systems that are inordinately facing increasing anthropogenic pressures and decreasing biodiversity. For stream organisms, habitat conditions during high flows may be impossible to measure in the field, but can be an important factor for their distribution, especially for less mobile organisms like freshwater mussels. Hence, the objective of this study was to use a two dimensional HEC-RAS model to simulate hydraulic conditions during high and baseline flows (flows approx. 10-600 x and 0.7 x median daily flows respectively) in a 20 km segment in the San Saba River, Texas in combination with existing mussel survey data from 200 sites (collected every 100m) to 1) examine whether hydraulic conditions differed between areas of increased mussel richness and diversity (referred to as hotspots) and other sites, and 2) understand how well site occupancy and species abundance could be explained by hydraulic conditions occurring under different flow conditions. The results showed that richness and diversity hotspots occurred in deeper areas with lower shear stress, stream power, and Froude number during both high and low flows. Occupancy could be predicted with 67-79% accuracy at the site scale and 60-70% accuracy at the mesohabitat scale (similar to 20 to 1200 m long). In addition, hydraulic conditions across flow scenarios explained up to 55% of variation in species abundances, but predictions were less successful for species often observed to occupy micro-scale flow refuges such as bedrock crevices. The results indicate that pools may serve as important refuge for all species during both high and low flow events, which may be relatively unique to bedrock-dominated systems. Understanding hydraulic conditions that occur at extreme flows such as these is important given that the frequency and magnitude of such events are increasing due to climate change.
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001164173200049
来源期刊	PLOS ONE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304195
作者单位	Texas State University System; Texas State University San Marcos; United States Department of Defense; United States Army; U.S. Army Corps of Engineers; U.S. Army Engineer Research & Development Center (ERDC)
推荐引用方式 GB/T 7714	Cushway, Kiara C.,Harris, Aubrey E.,Piercy, Candice D.,et al. Go with the flow: Impacts of high and low flow conditions on freshwater mussel assemblages and distribution[J],2024,19(2).
APA	Cushway, Kiara C.,Harris, Aubrey E.,Piercy, Candice D.,Mitchell, Zachary A.,&Schwalb, Astrid N..(2024).Go with the flow: Impacts of high and low flow conditions on freshwater mussel assemblages and distribution.PLOS ONE,19(2).
MLA	Cushway, Kiara C.,et al."Go with the flow: Impacts of high and low flow conditions on freshwater mussel assemblages and distribution".PLOS ONE 19.2(2024).