气候变化领域集成服务门户(CCPortal): Restoring freshwater habitat mosaics to promote resilience of vulnerable salmon populations

CCPortal

DOI	10.1002/ecs2.4803
	Restoring freshwater habitat mosaics to promote resilience of vulnerable salmon populations
	Cordoleani, Flora; Phillis, Corey C.; Sturrock, Anna M.; Willmes, Malte; Whitman, George; Holmes, Eric; Weber, Peter K.; Jeffres, Carson; Johnson, Rachel C.
发表日期	2024
ISSN	2150-8925
起始页码	15
结束页码	3
卷号	15 期号:3
英文摘要	Phenotypic diversity and abundance drive salmon resilience in the face of increasing environmental variability. But what happens when human activities fundamentally alter the habitat complexity that drives this diversity? And how can we restore habitats to recover both diversity and abundance to support salmon persistence in a warming climate? Here, we looked at the impact of a large watershed restoration effort on the abundance and climate resilience of the three remaining core natural spring-run Chinook Salmon populations in the California Central Valley (Butte, Mill, and Deer Creek). Butte Creek fish, which have floodplain access, had higher overall productivity and faster juvenile growth compared with Mill and Deer Creek populations, and the proportion of floodplain inundation was positively correlated with Butte Creek adult abundance two years later. While Butte Creek exhibited significant increases in abundance post-restoration (similar to 000%), it generally exhibited lower phenotypic diversity and only a marginal increase in population stability after restoration based on the coefficient of variation (CV). In particular, Butte Creek salmon tended to exhibit larger drops in escapement following dry years (e.g., return years 2010, 2017) compared with Mill and Deer Creek populations, presumably due to limited inundation of its downstream floodplain. The late-migrating juvenile strategy (i.e., yearling), which disproportionately supported Mill and Deer Creek populations during droughts, was uncommon among Butte Creek adults (averaging 60% of returns for Mill and Deer Creek vs. 0.3% for Butte Creek). Increased spring-run stock complex stability was found, post-restoration, when combining the three spring-run populations (i.e., lower aggregate CV). However, among-river pairwise correlations also suggested increased synchronization in population abundances post-restoration, potentially due to increasing frequency and severity of extreme climatic events (e.g., droughts and ocean warming). This study underscores the importance of restoring a connected mosaic of aquatic habitats across modified landscapes, such as cold water refugia and floodplains, to preserve multiple (across-population) life history pathways for increasing salmon stock complex stability and abundance. These landscape-scale process-based habitat restoration efforts are likely to be crucial for the successful long-term recovery of vulnerable species in a rapidly changing climate.
英文关键词	floodplain; habitat mosaic; life history strategy; portfolio effect; restoration; spring-run Chinook Salmon; warming climate
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001182186400001
来源期刊	ECOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305675
作者单位	University of California System; University of California Santa Cruz; National Oceanic Atmospheric Admin (NOAA) - USA; University of Essex; Norwegian Institute Nature Research; University of California System; University of California Davis; United States Department of Energy (DOE); Lawrence Livermore National Laboratory
推荐引用方式 GB/T 7714	Cordoleani, Flora,Phillis, Corey C.,Sturrock, Anna M.,et al. Restoring freshwater habitat mosaics to promote resilience of vulnerable salmon populations[J],2024,15(3).
APA	Cordoleani, Flora.,Phillis, Corey C..,Sturrock, Anna M..,Willmes, Malte.,Whitman, George.,...&Johnson, Rachel C..(2024).Restoring freshwater habitat mosaics to promote resilience of vulnerable salmon populations.ECOSPHERE,15(3).
MLA	Cordoleani, Flora,et al."Restoring freshwater habitat mosaics to promote resilience of vulnerable salmon populations".ECOSPHERE 15.3(2024).