Impact of Nitellopsis obtusa (Desv.) J. Groves, a regionally alien and invasive charophyte, on macrophyte diversity in the species native range
Pełechaty M. Zhapparova B. Brzozowski M. Pukacz A.
January 2022Springer Science and Business Media Deutschland GmbH
Hydrobiologia
2022#849Issue 163 - 76 pp.
This study aimed to determine the relationships between the abundance of Nitellopsis obtusa, a controversial charophyte, locally red-listed in its native Eurasian range but invasive in North America, and the species diversity of macrophyte stands dominated by N. obtusa. Three lakes of different morphology, productivity and catchment were surveyed in the species native range. In each lake, the species composition and cover of three N. obtusa-dominated stands were determined monthly from spring to autumn and illustrated by the Shannon–Wiener diversity index. Water chemistry supplemented vegetation study. The species diversity turned out to be lake-specific and declined with the increasing share of N. obtusa, which developed mass occurrence in less mineralised and less fertile waters, leaving no space and limiting light and nutrient availability for large and branchy macrophytes. We postulate that this mechanism makes N. obtusa a superior competitor in less fertile waters and seems common to both native and invaded territories, as is the pool of macrophyte species most frequently co-occurring with N. obtusa.
Aquatic plants , Biodiversity , Chara-lakes , Inter-species relationships , Macroalgae
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Department of Hydrobiology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, Poznań, 61-614, Poland
Department of Management and Engineering in the field of Environmental Protection, Faculty of Natural Sciences, L.N. Gumilyov Eurasian National University, Satpayev 2, Nur-Sultan, 010000, Kazakhstan
Astana Botanical Garden, Laboratory of Flora and Plant Resources, Orynbor 16, Nur-Sultan, 010000, Kazakhstan
Collegium Polonicum, Adam Mickiewicz University, Kościuszki 1, Słubice, 69-100, Poland
Department of Hydrobiology
Department of Management and Engineering in the field of Environmental Protection
Astana Botanical Garden
Collegium Polonicum
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