Seasonal dynamics of plankton communities coupled with environmental factors in a semi arid area: Sidi Sad reservoir (Center of Tunisia)
| Autor: | Ikbel Sellami, Mohamed Alaoui Mhamdi, B. Pinel-alloul, Wassim Guermazi, Lotfi Aleya, A. Hamza, Habib Ayadi, Monia El Bour, SB Romdahane |
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| Přispěvatelé: | UR Biodiversité & Ecosystèmes Aquatiques, University of Sfax, Institut National des Sciences et Technologies de la Mer [Salammbô], Département de Biologie, Université Sidi Mohamed Ben Abdellah, Groupe de recherche interuniversitaire en limnologie et en environnement aquatique - GRIL (Montréal, Canada), Université de Montréal ( UdeM ), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Université de Sfax - University of Sfax, Institut National des Sciences et Technologies de la Mer [Salammbô] (INSTM), Université Sidi Mohamed Ben Abdellah (USMBA), Université de Montréal (UdeM), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC) |
| Rok vydání: | 2012 |
| Předmět: |
zooplankton
0106 biological sciences Cyanobacteria 010603 evolutionary biology 01 natural sciences Applied Microbiology and Biotechnology Zooplankton [ SDE ] Environmental Sciences Sidi Saâd reservoir water temperature Algae Abundance (ecology) Phytoplankton Genetics 14. Life underwater Molecular Biology biology Sidi Saâd reservoir water temperature bacterioplankton phytoplankton zooplankton top-down and bottom-up regulations Ecology bacterioplankton 010604 marine biology & hydrobiology top-down and bottom-up regulations Bacterioplankton Plankton biology.organism_classification Cladocera 13. Climate action [SDE]Environmental Sciences phytoplankton Environmental science Agronomy and Crop Science Biotechnology |
| Zdroj: | African Journal of Biotechnology African Journal of Biotechnology, Academic Journals, 2012, 11 (4), pp.865-877. 〈10.5897/AJB11.2145〉 African Journal of Biotechnology; Vol 11, No 4 (2012); 865-877 African Journal of Biotechnology, Academic Journals, 2012, 11 (4), pp.865-877. ⟨10.5897/AJB11.2145⟩ |
| ISSN: | 1684-5315 |
| DOI: | 10.5897/ajb11.2145 |
| Popis: | In this study, we studied the influence of the physical-chemical and biological factors (bacterioplankton and phytoplankton abundances) for zooplankton dynamics in a Sidi Saâd reservoir in Centre of Tunisia. The samplings were carried out in spring, summer, autumn and winter (2005 to 2006) in the deepest station (surface, 5, 10 and 15 m). In this reservoir, the highest density of zooplankton abundance was recorded in summer (92.2 ind L -1 ; 0.43 × 10 3 μg L -1 ) and autumn (86.9 ind L -1 ; 0.23 × 10 3 μg L -1 ) at a depth of 10 m. The copepods (56% of total zooplankton abundance) and cladocera (42% of total zooplankton abundance) were the most abundant groups. The physico-chemical factors, especially the water temperature (r = 0.53, p = 0.027, n = 16) and dissolved oxygen (r = -0.59, p = 0.03, n = 16), influence directly the zooplankton community. It was suggested that in Sidi Saâd reservoir, both the top-down and bottom-up regulations account for the regulation of zooplankton. The phytoplankton was the factor responsible for the structure and seasonal dynamics of the zooplankton community, which are well related to changes in algae diversity and abundance, noting that cyanobacteria have major impacts. The “top-down” effect of planktivorous fish on the zooplankton is a significant factor affecting the plankton community’s dynamics in this reservoir. Key words : Sidi Saâd reservoir, water temperature, bacterioplankton, phytoplankton, zooplankton, top-down and bottom-up regulations. |
| Databáze: | OpenAIRE |
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