Short-term effects of macrophyte removal on aquatic biodiversity in rivers and lakes.

Autor: Misteli B; Université de Rennes 1, UMR 6553 CNRS ECOBIO, 263 Avenue Du Général, 35042 Rennes, France. Electronic address: bmisteli@outlook.com., Pannard A; Université de Rennes 1, UMR 6553 CNRS ECOBIO, 263 Avenue Du Général, 35042 Rennes, France., Aasland E; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1430 Ås, Norway., Harpenslager SF; Department of Community and Ecosystem Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 301, 12587, Berlin, Germany., Motitsoe S; Rhodes University, Center for Biological Control, Department of Zoology and Entomology, P.O. Box 94, 6139, Grahamstown, South Africa., Thiemer K; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1430 Ås, Norway; Section for Nature-based Solutions and Aquatic Ecology, Norwegian Institute for Water Research, Økernveien 94, 0579, Oslo, Norway., Llopis S; Université de Rennes 1, UMR 6553 CNRS ECOBIO, 263 Avenue Du Général, 35042 Rennes, France., Coetzee J; Rhodes University, Center for Biological Control, Department of Zoology and Entomology, P.O. Box 94, 6139, Grahamstown, South Africa., Hilt S; Department of Community and Ecosystem Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 301, 12587, Berlin, Germany., Köhler J; Department of Community and Ecosystem Ecology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 301, 12587, Berlin, Germany., Schneider SC; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, 1430 Ås, Norway; Section for Nature-based Solutions and Aquatic Ecology, Norwegian Institute for Water Research, Økernveien 94, 0579, Oslo, Norway., Piscart C; Université de Rennes 1, UMR 6553 CNRS ECOBIO, 263 Avenue Du Général, 35042 Rennes, France., Thiébaut G; Université de Rennes 1, UMR 6553 CNRS ECOBIO, 263 Avenue Du Général, 35042 Rennes, France.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2023 Jan 01; Vol. 325 (Pt A), pp. 116442. Date of Electronic Publication: 2022 Oct 13.
DOI: 10.1016/j.jenvman.2022.116442
Abstrakt: Mass development of macrophytes is an increasing problem in many aquatic systems worldwide. Dense mats of macrophytes can negatively affect activities like boating, fishing or hydropower production and one of the management measures often applied is mechanical removal. In this study, we analyzed the effect of mechanical macrophyte removal on phytoplankton, zooplankton, and macroinvertebrate (pelagic and benthic samples) assemblages. Our study covered five sites in four countries in Europe and Africa with highly variable characteristics. In all sites, dense mats of different macrophyte species (Juncus bulbosus in a river in Norway; a mix of native macrophytes in a German river, Elodea nuttallii in a lake in Germany, Ludwigia spp. In a French lake and Pontederia crassipes in a South African lake) are problematic and mechanical removal was applied. In every country, we repeated the same BACI (Before-After-Control-Impact) design, including "before", "one week after", and "six weeks after" sampling in a control and an impact section. Repeating the same experimental design at all sites allowed us to disentangle common effects across all sites from site-specific effects. For each taxonomic group, we analyzed three structural and three functional parameters, which we combined in a scoring system. Overall, the removal of macrophytes negatively affected biodiversity, in particular of zooplankton and macroinvertebrate assemblages. In contrast, plant removal had positive effects on the phytoplankton assemblages. Effects were more pronounced one week after removal than six weeks after. Consequently, we suggest a stronger consideration of the effect of plant removal on biodiversity to arrive at more sustainable management practices in the future.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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