Local and regional factors influencing zooplankton communities in the connected Kasseb Reservoir, Tunisia

Associations between zooplankton community structure and abiotic (temperature, dissolved oxygen, turbidity, nutriments) and biotic factors (chlorophyll a and phytoplankton community) were examined, in Kasseb Reservoir, northern Tunisia. Samples were taken bimonthly from July to December 2002 at 3 sa...

Full description

Saved in:
Bibliographic Details
Published in:Water S. A. 2011-04, Vol.37 (2), p.201-212
Main Authors: Hamza, Asma, Mhamdi, Mohammed Alaoui, Sellami, Ikbel, Elloumi, Jannet, Ayadi, Habib
Format: Article
Language:English
Subjects:
Abundance
Aquatic ecology
Biological and medical sciences
Biotic factors
Communities
Community structure
Dissolved oxygen
Earth sciences
Earth, ocean, space
Eutrophication
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Heterogeneous distribution
Hydrologic connections
Hydrology
Hydrology. Hydrogeology
Institut National des Sciences et Technologie de la Mer
Local and regional factors
Mathematical models
Phytoplankton
Plankton
Reservoir
Reservoirs
Rivers
Species richness
Stations
Studies
Trophic levels
Turbidity
Universite de Sfax
Universite Sidi-Mohammed-Ben-Abdallah
Zooplankton
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Associations between zooplankton community structure and abiotic (temperature, dissolved oxygen, turbidity, nutriments) and biotic factors (chlorophyll a and phytoplankton community) were examined, in Kasseb Reservoir, northern Tunisia. Samples were taken bimonthly from July to December 2002 at 3 sampling stations (deepest station: Station 1, Brik River: Station 2 and M'Zaz Stama River: Station 3). From our results it is evident that zooplankton exhibit seasonally and spatially heterogeneous distribution. The highest density of zooplankton was recorded in September at a depth of 5 m (10.8 x 103 ind·ℓ-1). At Station 1 cyclopoid copepods (65% of total abundance) were the most abundant group followed by Cladocera (21% of total abundance). At Station 2 (93% of total abundance) and Station 3 (98% of total abundance) cyclopoid copepods were numerically dominant throughout the study period. Canonical correspondence analysis (CCA) was used to estimate the influence of abiotic and biotic factors in structuring the zooplankton assemblage. Zooplankton abundance was negatively correlated with turbidity (r= -0.381, P
ISSN:0378-4738
0378-4738
DOI:10.4314/wsa.v37i2.65865