干旱区生态环境知识资源中心(Arid): Loss of intermediate-flow states only evident when considering sub-daily flow metrics in a major tributary of the Limpopo basin

Arid

DOI	10.1002/eco.2381
	Loss of intermediate-flow states only evident when considering sub-daily flow metrics in a major tributary of the Limpopo basin
	Ramulifho, Pfananani A.; Rivers-Moore, Nick A.; Foord, Stefan H.
通讯作者	Ramulifho, PA (corresponding author)，Univ Venda, Dept Zool, ZA-0950 Thohoyandou, South Africa. ; Ramulifho, PA (corresponding author)，Univ Venda, Chair Biodivers Value & Change Vhembe Biosphere R, ZA-0950 Thohoyandou, South Africa.
来源期刊	ECOHYDROLOGY
ISSN	1936-0584
EISSN	1936-0592
出版年	2022-01
英文摘要	As the impacts of the anthropocene intensifies, there is an increasing need to understand how these changes affect both daily and sub-daily stream flow variability, timing and flow quantities, as these are some of the most influential drivers of spatial and temporal dynamics of stream biota. In this paper, long-term changes in flow patterns of a strategic water source area (Luvuvhu catchment) in an arid region of southern Africa were quantified, focusing on the relation between daily and sub-daily flow and its potential impact on fish biota of the catchment. Long-term temporal trends in stream flow were modelled using generalized least squares (GLS), while sub-daily and daily mean flow of the same stations were compared using a suite of metrics. Periods of similar stream flow patterns were identified using K-means cluster analysis. A spreadsheet rule-based model was developed linking fish communities to streamflow patterns, providing a predictive framework for fish assemblage responses to stream flow classes. Long-term reduction in flow in the Luvuvhu catchment has a strong seasonal component, with significant decreases during the wet season, not linked to long-term rainfall patterns. The flow regime of the Luvuvhu river system has become more variable over time. Several sub-daily flow metrics were positively related to daily flow metrics. Oscillating flow conditions and the loss of intermediate-flow states may permanently exclude certain fish flow guilds. However, temporal partitioning is only evident when sub-daily metrics are considered, highlighting their importance for assessing ecological resilience.
英文关键词	daily flow metrics fish assemblage hydrological change long-term seasonality
类型	Article ; Early Access
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000746461500001
WOS关键词	SOUTH-AFRICA ; WATER ; RIVER ; COMMUNITIES ; VARIABILITY ; REGIMES ; MANAGEMENT ; PATTERNS ; INDEX
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377085
作者单位	[Ramulifho, Pfananani A.; Foord, Stefan H.] Univ Venda, Dept Zool, ZA-0950 Thohoyandou, South Africa; [Ramulifho, Pfananani A.; Foord, Stefan H.] Univ Venda, Chair Biodivers Value & Change Vhembe Biosphere R, ZA-0950 Thohoyandou, South Africa; [Rivers-Moore, Nick A.] Univ KwaZulu Natal, Ctr Water Resources Res, Scottsville, South Africa; [Rivers-Moore, Nick A.] Freshwater Res Ctr, Cape Town, South Africa
推荐引用方式 GB/T 7714	Ramulifho, Pfananani A.,Rivers-Moore, Nick A.,Foord, Stefan H.. Loss of intermediate-flow states only evident when considering sub-daily flow metrics in a major tributary of the Limpopo basin[J],2022.
APA	Ramulifho, Pfananani A.,Rivers-Moore, Nick A.,&Foord, Stefan H..(2022).Loss of intermediate-flow states only evident when considering sub-daily flow metrics in a major tributary of the Limpopo basin.ECOHYDROLOGY.
MLA	Ramulifho, Pfananani A.,et al."Loss of intermediate-flow states only evident when considering sub-daily flow metrics in a major tributary of the Limpopo basin".ECOHYDROLOGY (2022).