干旱区生态环境知识资源中心(Arid): Linking flow and upper thermal limits of freshwater mussels to inform environmental flow benchmarks

Arid

DOI	10.1111/fwb.13598
	Linking flow and upper thermal limits of freshwater mussels to inform environmental flow benchmarks
	Khan, Jennifer M.; Dudding, Jack; Hart, Michael; Robertson, Clinton R.; Lopez, Roel; Randklev, Charles R.
通讯作者	Khan, JM
来源期刊	FRESHWATER BIOLOGY
ISSN	0046-5070
EISSN	1365-2427
出版年	2020
卷号	65 期号:12 页码:2037-2052
英文摘要	Freshwater ecosystems are experiencing shifts in the natural range and variation of water temperatures due to anthropogenic activity, and these shifts can negatively affect survival, growth, and reproduction of aquatic species. Among the groups most affected are freshwater mussels of the family Unionidae. Knowledge of sublethal and lethal effects on mussels from changes in water temperature are largely unknown, especially for species from arid and semi-arid regions such as the south-western U.S.A. This limits the ability to assess, forecast, and adaptively manage this threat for those species and to understand how temperature influences population performance and community structure. To determine the effects of elevated water temperature on mussels from the south-western U.S.A., we evaluated the upper thermal tolerances of adults of three species (Amblema plicata,Cyclonaias necki, andFusconaia mitchelli) from the Guadalupe River. Mussels were acclimated to 27 degrees C and then tested across a range of experimental temperatures (30-39 degrees C) in standard acute (96-hr) and chronic (10-day) laboratory tests. The acute and chronic thresholds identified in thermal tolerance testing were then related to in situ water temperature and flows using a uniform continuous above-threshold analysis, which evaluates the duration and frequency of continuous events above a specified temperature threshold. Median lethal temperature in 96-hr tests averaged 36.4 degrees C and ranged from 33.7 to 37.5 degrees C, while the chronic 10-day tests averaged 35.9 degrees C and ranged from 32.4 to 37.5 degrees C. Thermal tolerances ofF. mitchelliwere significantly lower than bothA. plicataandC. necki, and the uniform continuous above-threshold analysis showed that temperature affecting 5% of the population thresholds were exceeded forF. mitchelliin the Guadalupe River at both acute (96-hr) and chronic (10-day) values (30.5 and 28.4 degrees C, respectively). Findings from this study indicate that freshwater mussels from the arid and semi-arid regions of the south-west U.S.A. are already at risk from rising environmental temperatures and altered hydrology. However, by incorporating laboratory thermal tolerance estimates with in situ temperature and discharge data, we provide a range of hydrologic thresholds to inform environmental flow recommendations and potentially mitigate thermal stress occurring during periods of low flow. In addition, this method can be readily adapted to other arid regions to guide flow recommendations or assess whether flow standards are sufficient to protect freshwater mussel populations during severe droughts and low flow periods.
英文关键词	conservation low flow thermal tolerance Unionidae water management
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000565452100001
WOS关键词	CLIMATE-CHANGE ; UNIONID MUSSELS ; ALASMIDONTA-HETERODON ; TEMPERATURE ; TOLERANCES ; CONSERVATION ; SEDIMENT ; PATTERNS ; RIVER ; TEXAS
WOS类目	Ecology ; Marine & Freshwater Biology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325995
作者单位	[Khan, Jennifer M.; Hart, Michael; Lopez, Roel; Randklev, Charles R.] Texas A&M Univ, Nat Resources Inst, College Stn, TX USA; [Khan, Jennifer M.] US Fish & Wildlife Serv, Arlington Ecol Serv Field Off, Arlington, TX 76006 USA; [Dudding, Jack] Utah Div Wildlife Resources, Fisheries Expt Stn, Logan, UT USA; [Robertson, Clinton R.] Texas Parks & Wildlife Dept, Inland Fisheries Div, San Marcos, TX USA
推荐引用方式 GB/T 7714	Khan, Jennifer M.,Dudding, Jack,Hart, Michael,et al. Linking flow and upper thermal limits of freshwater mussels to inform environmental flow benchmarks[J],2020,65(12):2037-2052.
APA	Khan, Jennifer M.,Dudding, Jack,Hart, Michael,Robertson, Clinton R.,Lopez, Roel,&Randklev, Charles R..(2020).Linking flow and upper thermal limits of freshwater mussels to inform environmental flow benchmarks.FRESHWATER BIOLOGY,65(12),2037-2052.
MLA	Khan, Jennifer M.,et al."Linking flow and upper thermal limits of freshwater mussels to inform environmental flow benchmarks".FRESHWATER BIOLOGY 65.12(2020):2037-2052.