干旱区生态环境知识资源中心(Arid): Spatial and temporal dynamics of fish assemblages in a desert reservoir over 38 years

Arid

DOI	10.1007/s10750-021-04514-z
	Spatial and temporal dynamics of fish assemblages in a desert reservoir over 38 years
	Pennock, Casey A.; Gido, Keith B.
通讯作者	Pennock, CA (corresponding author), Kansas State Univ, Div Biol, Ackert Hall, Manhattan, KS 66506 USA. ; Pennock, CA (corresponding author), Utah State Univ, Dept Watershed Sci, Logan, UT 84322 USA. ; Pennock, CA (corresponding author), Utah State Univ, Ctr Ecol, Logan, UT 84322 USA.
来源期刊	HYDROBIOLOGIA
ISSN	0018-8158
EISSN	1573-5117
出版年	2021
卷号	848 期号:6 页码:1231-1248
英文摘要	Processes associated with reservoir aging threaten the capacity of systems to continue providing productive fisheries, and declining productivity might be exacerbated by decreasing water level associated with climate change and water abstraction. Despite their prevalence in riverscapes, we know little about long-term fish dynamics in reservoirs. Using a 38-year dataset from Lake Powell, USA, we tested for changes in assemblage structure and changes in fish condition for the most abundant species. The assemblage has undergone re-ordering of species relative abundance, but the same core species captured in 1981 were still present in 2018. Five species increased in relative abundance, while two declined, and seven remained unchanged. Walleye Sander vitreus and Smallmouth Bass Micropterus dolomieu were among those increasing over time, while Channel Catfish Ictalurus punctatus and Common Carp Cyprinus carpio declined. We were not able to attribute changes in fish assemblages with a suite of abiotic and biotic variables. Condition was low and declined over time for four of the six species. Although water level declined over time, we did not observe obvious declines in basal food resources. Declining water level has reduced availability of littoral habitat and likely contributed to declines in some species associated with this zone.
英文关键词	Community Stability Non-native species Colorado river Long-term data
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000617817700001
WOS类目	Marine & Freshwater Biology
WOS研究方向	Marine & Freshwater Biology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350486
作者单位	[Pennock, Casey A.; Gido, Keith B.] Kansas State Univ, Div Biol, Ackert Hall, Manhattan, KS 66506 USA; [Pennock, Casey A.] Utah State Univ, Dept Watershed Sci, Logan, UT 84322 USA; [Pennock, Casey A.] Utah State Univ, Ctr Ecol, Logan, UT 84322 USA
推荐引用方式 GB/T 7714	Pennock, Casey A.,Gido, Keith B.. Spatial and temporal dynamics of fish assemblages in a desert reservoir over 38 years[J],2021,848(6):1231-1248.
APA	Pennock, Casey A.,&Gido, Keith B..(2021).Spatial and temporal dynamics of fish assemblages in a desert reservoir over 38 years.HYDROBIOLOGIA,848(6),1231-1248.
MLA	Pennock, Casey A.,et al."Spatial and temporal dynamics of fish assemblages in a desert reservoir over 38 years".HYDROBIOLOGIA 848.6(2021):1231-1248.