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DOI	10.1111/fwb.13428
	Can dispersal buffer against salinity-driven zooplankton community change in Great Plains' lakes?
	Huynh, Mercedes; Gray, Derek K.
通讯作者	Gray, Derek K.
来源期刊	FRESHWATER BIOLOGY
ISSN	0046-5070
EISSN	1365-2427
出版年	2020
卷号	65 期号:2 页码:337-350
英文摘要	The North American Great Plains contains thousands of lakes that vary in salinity from freshwater to hypersaline. Paleolimnological studies show that salinity levels in these lakes are tightly linked with climate, and current projections point to a more arid future in the region due to natural and anthropogenic climate change, potentially influencing lake salinity. Many zooplankton species are sensitive to changes in salinity, and their position near the base of the aquatic food web makes it important to understand how they might respond to increasing salinity levels. Zooplankton communities in lakes with rising salinity levels may exhibit changes in structure, including a shift toward more salinity-tolerant species and a reduction in abundance, species richness, and diversity. However, it is possible that dispersal of zooplankton among lakes could mitigate such community changes when migrant populations replace sensitive zooplankton with those that are locally adapted to higher salinities. To test if dispersal could reduce salinity-induced changes in zooplankton communities, we ran a field enclosure experiment at a freshwater lake in southern Saskatchewan where we manipulated salinity levels and zooplankton dispersal. We evaluated how salinity and dispersal influenced species identities and relative abundances (community structure) using multivariate statistics and comparing taxonomic and functional compositions among the different treatments (richness, diversity, and evenness). We found that increasing salinity levels in our enclosures above that in our study lake resulted in lower zooplankton abundances and species richness levels, primarily due to the loss of cladoceran species. However, patterns in our multivariate analyses suggested that cladocerans were maintained in enclosures with salinity levels of 2.5 and 5.0 g/L when those enclosures received immigration from nearby lakes. In contrast, our univariate analyses failed to find evidence that immigration affected community structure (richness, diversity, evenness). The lack of significant statistical differences could suggest that dispersal does not have an effect, or it may have been a problem with statistical power, as a power analysis suggested that fairly large effect sizes would have been required to achieve statistical significance. Based on our results, we were unable to reach a definitive conclusion on the role that dispersal might play in buffering zooplankton communities against salinity-driven changes. However, our study provides two important insights for planning future work. First, our power analyses indicated that more replication may be needed given the variability among our experimental enclosures. Second, the patterns in our multivariate analyses suggested that cladocerans could be maintained in lakes undergoing salinity increases if they receive immigration from surrounding lakes with higher salinities. Future work examining how inter- and intraspecific salinity tolerance varies across lakes with a gradient of salinities would be helpful for understanding the role that dispersal might play in buffering against salinity-driven losses of cladoceran zooplankton.
英文关键词	plankton endorheic lakes Prairies salinisation climate change
类型	Article
语种	英语
国家	Canada
收录类别	SCI-E
WOS记录号	WOS:000499143200001
WOS关键词	FUNCTIONAL DIVERSITY ; DAPHNIA-MAGNA ; ROAD SALT ; COMPENSATORY DYNAMICS ; AQUATIC INVERTEBRATES ; SPATIAL INSURANCE ; SPECIES-DIVERSITY ; CLIMATE-CHANGE ; LIFE-HISTORY ; FRESH
WOS类目	Ecology ; Marine & Freshwater Biology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
EI主题词	2019-11-28
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311002
作者单位	Wilfrid Laurier Univ, Dept Biol, Waterloo, ON N2L 3C5, Canada
推荐引用方式 GB/T 7714	Huynh, Mercedes,Gray, Derek K.. Can dispersal buffer against salinity-driven zooplankton community change in Great Plains' lakes?[J],2020,65(2):337-350.
APA	Huynh, Mercedes,&Gray, Derek K..(2020).Can dispersal buffer against salinity-driven zooplankton community change in Great Plains' lakes?.FRESHWATER BIOLOGY,65(2),337-350.
MLA	Huynh, Mercedes,et al."Can dispersal buffer against salinity-driven zooplankton community change in Great Plains' lakes?".FRESHWATER BIOLOGY 65.2(2020):337-350.