Intermittency as an Environmental Filter: Diatom Traits and Water Quality Indicators in a Hydrodynamic Context
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Tartalom: http://hdl.handle.net/20.500.12944/106125
Archívum: Közszolgálati Tudásportál
Gyűjtemény: Publikációk
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Cím:
Intermittency as an Environmental Filter: Diatom Traits and Water Quality Indicators in a Hydrodynamic Context
Létrehozó:
Rusanov, Alexander G.
Trábert, Zsuzsa
Kiss, Keve T.
Korponai, János L.
Kolobov, Mikhail Y.
Bíró, Tibor
Vadkerti, Edit
Ács, Éva
Tartalmi leírás:
Global climate changes have led to dramatic increases in drought durations in previously permanent streams, impacting the biodiversity and functioning of river ecosystems. However, the response of benthic diatom communities to hydrological intermittency remains poorly understood. In this study, we compared the taxonomic and functional compositions of the diatom communities between permanent and intermittent sections in two hilly stream systems in southwestern Hungary. Our results showed that both the taxonomic and functional compositions of diatom communities were significantly affected by changes in the hydrological regime, leading to a decline in species richness and diversity and functional richness in intermittent sections. Functional richness and dispersion decreased significantly with declining taxonomic richness, likely as a consequence of species loss driven by flow intermittency. Aquatic–subaerial diatoms with moderate oxygen requirements were indicative of intermittent sections, while large, occasionally aerophilic and oxybiontic diatoms characterized permanent sections. The relative abundance of low-profile diatoms increased in intermittent sections, indicating that the natural successional process of communities was disrupted due to streambed drying. Furthermore, intermittent sections were marked by elevated abundances of α-mesosaprobous and α-meso-polysaprobous diatoms, indicating a reduced self-purification capacity under intermittent-flow conditions. These findings provide detailed insight into the responses of diatom communities to drought and water scarcity in intermittent streams, which are becoming increasingly common in warm temperate regions.
Típus:
info:eu-repo/semantics/article
Formátum:
application/pdf
Azonosító:
nke:36288756
nke:10061823
nke:HYDROLOGY
nke:12
nke:8
nke:HYDROLOGY-BASEL
Létrehozó:
info:eu-repo/semantics/openAccess