Evolution of the benthic communities in a north-African river, the upper Sebou (middle atlas-Morocco) between 1981 and 2017: effects of global changes.
In: Biologia, Jg. 76 (2021-10-01), Heft 10, S. 2973-2989
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Zugriff:
The invertebrate communities of running waters are known to be highly sensitive to environmental disturbances and have, therefore, high interest in bio assessment. The objective of this study is to reveal, through a case study (the Upper Sebou, Morocco), the trends of these communities in the South Mediterranean region in a context of global change. The study consists in describing and interpreting the changes undergone by insect populations in the studied river between two periods (1981–1985 and 2015–2017), i.e. over a 34-years period. These changes are mainly attested by a strong decrease in species richness, indicating the disappearance of several rheophilic and/or pollution-sensitive species, especially among Plecoptera, and the regression of some taxa against the proliferation of thermophilic and/or pollution-tolerant forms. The data melting of both periods, via a binary matrix 'species × stations-periods' treated by the Correspondence Analysis, revealed the classical upstream-downstream ordination of the studied waters, where the majority of the stations register a downstream migration by the time. In this evolutionary perspective, the study implicates the hydrological and thermal factors depending on global warming and on anthropization of the watershed. [ABSTRACT FROM AUTHOR]
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Titel: |
Evolution of the benthic communities in a north-African river, the upper Sebou (middle atlas-Morocco) between 1981 and 2017: effects of global changes.
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Autor/in / Beteiligte Person: | Zerrouk, Mariam ; Dakki, Mohamed ; El Agbani, Mohammed Aziz ; El Alami, Majida ; Bennas, Nard ; Qninba, Abdeljebbar ; Himmi, Oumnia |
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Zeitschrift: | Biologia, Jg. 76 (2021-10-01), Heft 10, S. 2973-2989 |
Veröffentlichung: | 2021 |
Medientyp: | academicJournal |
ISSN: | 0006-3088 (print) |
DOI: | 10.1007/s11756-021-00787-w |
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