干旱区生态环境知识资源中心(Arid): Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams

Arid

DOI	10.1016/j.scitotenv.2019.134658
	Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams
	Manolaki, Paraskevi 1,2; Guo, Kun 2; Vieira, Cristiana 3; Papastergiadou, Eva 4; Riis, Tenna 2
通讯作者	Manolaki, Paraskevi
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	703
英文摘要	Macrophytes have a crucial impact on stream functioning. However, there is a significant gap of knowledge about how hydromorphological fluctuations affect their structural and functional responses in southern Mediterranean streams. In this study, we investigated the impact of hydromorphology on macrophyte stream assemblages in Cyprus and analysed their structural and functional responses. We collected macrophytes and hydromorphological data from 63 sites along a gradient from permanent to intermittent streams. We applied Principal Component Analysis (PCA) to identify and characterise stream sub-types. We performed an Indicator Species Analysis (ISA) and estimated taxonomical diversity indices to investigate whether differences among stream sub-types affect macrophytes assemblage structure. Functional responses to the flow regime were tested by allocating traits related to persistence, regeneration, dispersibility and ecological preferences for moisture, light, nutrients and salinity. The results indicated the existence of two permanent and two intermittent flow sub-types. A total of 25 indicator species were identified showing taxonomic variation in macrophyte assemblages among streams with different flow regimes. We demonstrated that flow intermittency promotes a higher number of indicator species with wider ecological preferences and traits allowing resilience to drought. Specifically, we found that macrophytes in the intermittent streams, survive during dry period through the establishment of dormant seed bank or through belowground organs. They also showed lower values of Specific Leaf Area and therefore a reduction of water loss through evapotranspiration. In the light of climate change, where droughts are anticipated to increase, more permanent streams will become intermittent especially in south Mediterranean countries, and new habitats will be released, including marginal zones. Our results showed that these alterations in stream hydromorphology will produce changes in macrophyte assemblages which might cause shifts in stream ecosystem functions and services. Therefore, our knowledge about the direction of these changes is crucial for future management and conservation plans. (C) 2019 Elsevier B.V. All rights reserved.
英文关键词	Stream flow regime Perennial and intermittent streams Cyprus Functional and taxonomic diversity indices Macrophytes ecological preferences
类型	Article
语种	英语
国家	Denmark ; Portugal ; Greece
收录类别	SCI-E
WOS记录号	WOS:000505924300087
WOS关键词	FISH ASSEMBLAGES ; ALGAL RECOLONIZATION ; PLANTS ; DIVERSITY ; DROUGHT ; COMMUNITIES ; MECHANISMS ; STRATEGIES ; CORRIDORS ; GRADIENTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-02-10
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312859
作者单位	1.Aarhus Univ, Aarhus Inst Adv Studies, Aarhus C, Denmark; 2.Aarhus Univ, Dept Biosci, Aarhus C, Denmark; 3.UP, MHNC, UPorto, PRISC, P-4099002 Porto, Portugal; 4.Univ Patras, Dept Biol, Univ Campus Rio, Patras 26500, Greece
推荐引用方式 GB/T 7714	Manolaki, Paraskevi,Guo, Kun,Vieira, Cristiana,et al. Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams[J],2020,703.
APA	Manolaki, Paraskevi,Guo, Kun,Vieira, Cristiana,Papastergiadou, Eva,&Riis, Tenna.(2020).Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams.SCIENCE OF THE TOTAL ENVIRONMENT,703.
MLA	Manolaki, Paraskevi,et al."Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams".SCIENCE OF THE TOTAL ENVIRONMENT 703(2020).