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      Impacts of the invasive species Caulerpa cylindracea Sonder, 1845 on the algae flora of the west coast of Algeria

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          Abstract

          The assessment of the impacts of the expansion of the invasive species on taxonomic diversity, the abundance and dominance of groups of algae, the presence and/or absence of species of ecological interest that may or may not be indicative of water quality well mentioned, through the installation of a 20 × 20 cm quadrat representing the minimum area. The observation stations were visited monthly, during a repetitive three-year cycle, during the spring, summer and autumn seasons, periods of maximum growth and development of the algal flora and the results suggest the following facts. The invasive alga Caulerpa cylindracea Sonder, 1845 tends to colonise disturbed ecosystems reflecting a reduction in native algal diversity; in fact, we note a drastic impoverishment of the invaded algal community, represented by a limited number of Macrophyte algae accompanying the invasive taxon in phytosociological surveys and a Shannon-Weaver Diversity Index (H’) and Equitability reduced by 4.49 and 0.77 n the heavily affected station. The number of macroalgal species accompanying the invasive species has dropped by 52% in Salamandre. In addition, the multidimensional analysis, represented by the Hierarchical Ascendant Clustering applied to this case, confirms our results.

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          Most cited references 71

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          A taxonomic distinctness index and its statistical properties

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            New 'biodiversity' measures reveal a decrease in taxonomic distinctness with increasing stress

             RM Warwick,  KR Clarke (1995)
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              Taxonomic distinctness and environmental assessment

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                Author and article information

                Contributors
                Journal
                Biodivers Data J
                Biodivers Data J
                1
                urn:lsid:arphahub.com:pub:F9B2E808-C883-5F47-B276-6D62129E4FF4
                urn:lsid:zoobank.org:pub:245B00E9-BFE5-4B4F-B76E-15C30BA74C02
                Biodiversity Data Journal
                Pensoft Publishers
                1314-2836
                1314-2828
                2021
                26 May 2021
                : 9
                Affiliations
                [1 ] Laboratory of Animal Production Sciences and Techniques (LSTPA), University of Mostaganem, Mostaganem, Algeria Laboratory of Animal Production Sciences and Techniques (LSTPA), University of Mostaganem Mostaganem Algeria
                [2 ] University of Relizane, Relizane, Algeria University of Relizane Relizane Algeria
                Author notes
                Corresponding author: Mohamed Daoudi ( mohamed.daoudi@ 123456univ-mosta.dz ).

                Academic editor: Anne Thessen

                Article
                64535 16229
                10.3897/BDJ.9.e64535
                8175330
                Benabdallah Bachir Bouiadjra, Malika Ghellai, Mohamed Daoudi, Ibrahim Elkhalil Behmene, Mohammed El Amine Bachir Bouiadjra

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Page count
                Figures: 6, Tables: 5, References: 63
                Categories
                Research Article

                phytosociological, taxon, macrophytes, diversity, index, algae, invasive

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