The influence of <Emphasis Type="Italic">Ceratophyllum demersum</Emphasis> L. and <Emphasis Type="Italic">Stratiotes aloides</Emphasis> L. on richness and diversity of aquatic vegetation in the lakes of mid-eastern Poland |
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Authors: | Piotr Sugier Bogdan Lorens Stanisław Chmiel Marek Turczyński |
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Institution: | (1) Department of Ecology, Faculty of Biology and Earth Sciences, Maria Curie-Skłodowska University, Akademicka 19 Str, 20-033 Lublin, Poland;(2) Department of Hydrography, Faculty of Biology and Earth Sciences, Maria Curie-Skłodowska University, Akademicka 19 Str, 20-033 Lublin, Poland |
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Abstract: | The aim of this study was to estimate the influence of Ceratophyllum
demersum L. and Stratiotes aloides L. on the species richness and phytocoenotic diversity of aquatic vegetation in lakes. The study was based on field investigations
in the Łęczna-Włodawa Lake District located in mid-eastern Poland. The studied lakes (32) included both polymictic and dimictic
reservoirs. Both in the polymictic and dimictic lakes, statistically significant correlation coefficients were obtained between
the parameters that characterize Stratiotes aloides (the frequency in the phytosociological relevés, the percent share of Stratiotetum aloidis association in the phytolittoral) and those characteristic for species richness (the total number of hydromacrophytes, the
number of charophytes, elodeids, nymphaeids and lemnids), phytocoenotic richness (the mean number of species in the phytosociological
relevés) and phytocoenotic diversity (the Shannon–Wiener Index). The communities with a share of S. aloides are characterized by higher species richness. However, not a single case of statistically significant dependency was reported
between the parameters that describe C. demersum (the frequency in the phytosociological relevés, the percent share Ceratophylletum demersi association in the phytolittoral) and the vegetation traits in both lake groups. Common occurrence of Stratiotes aloides might be considered to be evidence for good status of an aquatic ecosystem and a very good indicator of species richness
and diversity of aquatic vegetation. |
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