Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams. / Manolaki, Paraskevi; Guo, Kun; Vieira, Cristiana; Papastergiadou, Eva; Riis, Tenna.

In: Science of the total Environment, Vol. 703, 134658, 02.2020.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

APA

CBE

MLA

Vancouver

Author

Bibtex

@article{e576a9d77f7946f68b4b354de780b16f,
title = "Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams",
abstract = "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.",
keywords = "Cyprus, Functional and taxonomic diversity indices, Macrophytes ecological preferences, Perennial and intermittent streams, Stream flow regime",
author = "Paraskevi Manolaki and Kun Guo and Cristiana Vieira and Eva Papastergiadou and Tenna Riis",
year = "2020",
month = "2",
doi = "10.1016/j.scitotenv.2019.134658",
language = "English",
volume = "703",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Hydromorphology as a controlling factor of macrophytes assemblage structure and functional traits in the semi-arid European Mediterranean streams

AU - Manolaki, Paraskevi

AU - Guo, Kun

AU - Vieira, Cristiana

AU - Papastergiadou, Eva

AU - Riis, Tenna

PY - 2020/2

Y1 - 2020/2

N2 - 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.

AB - 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.

KW - Cyprus

KW - Functional and taxonomic diversity indices

KW - Macrophytes ecological preferences

KW - Perennial and intermittent streams

KW - Stream flow regime

UR - http://www.scopus.com/inward/record.url?scp=85075895218&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2019.134658

DO - 10.1016/j.scitotenv.2019.134658

M3 - Journal article

C2 - 31767335

AN - SCOPUS:85075895218

VL - 703

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 134658

ER -