Spatial characterization of nutrient dynamics in the Bay of Tunis (south-western Mediterranean) using multivariate analyses: consequences for phyto- and zooplankton distribution

Souissi, Sami; Yahia-Kéfi, Ons Daly; Yahia, Mohamed Néjib Daly

doi:10.1093/plankt/22.11.2039

Cited by 52 publications

(41 citation statements)

References 19 publications

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“…NH 4 -N, NO 2 -N, NO 3 -N, TIN and PO 4 -P) were more important in Cluster II. These results were similar to the research for spatial characterization of nutrient dynamics in the Bay of Tunis (Souissi et al, 2000), for long-term changes in water quality and phytoplankton characteristics in Port Shelte (Yung et al, 2001) and also for the water quality and phytoplankton characteristics in Daya Bay (Wang et al, www.intechopen. Table 12.…”

Section: Identification Of Water Quality and Phytoplankton Benthos Csupporting

confidence: 89%

Effects of the Operating Nuclear Power Plant on Marine Ecology and Environment - A Case Study of Daya Bay in China

Wang¹

2011

Nuclear Power - Deployment, Operation and Sustainability

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Section: Identification Of Water Quality and Phytoplankton Benthos Csupporting

confidence: 89%

Effects of the Operating Nuclear Power Plant on Marine Ecology and Environment - A Case Study of Daya Bay in China

Wang¹

2011

Nuclear Power - Deployment, Operation and Sustainability

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“…In fact, water circulation in the small Gulf of Tunis is controlled by currents and tidal waves that cause an intense coastal erosion (Ben Charrada, 1997). This site is exposed to heavy pollution due to urban, industrial and agricultural waste coming from the region of Tunis (Souissi et al 2000). Regarding the Bizerta Lagoon, the intensity of water masses movement is normal given the presence of the tip of Echaraà that forms a barrier protecting the MA site (Frisoni et al 1986).…”

Section: Discussionmentioning

confidence: 99%

Relative growth and reproductive cycle in two populations of Bolinus brandaris (Gastropoda: Muricidae) from northern Tunisia (Bizerta Lagoon and small Gulf of Tunis)

2012

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A study on the relative growth and reproductive cycle of the purple dye murex (Bolinus brandaris) was performed from March 2007 to February 2008 in two populations with contrasting imposex levels (Carthage Byrsa -CB in the small Gulf of Tunis and Menzel Abderrahmane -MA in the Bizerta Lagoon). Both populations presented balanced sex ratios. Comparison of allometric relationships established between linear and ponderal variables (sexes confounded) revealed higher growth in CB than in MA. Mature individuals were found throughout the year, except for September in MA. Spawning periods occurred from March-April to May and from June to August in both sites. Spawning was associated to an increase in seawater temperature. Besides increasing the current knowledge on the biology of B. brandaris from the southern Mediterranean, the information gathered in the present study constitutes a useful baseline for the sustainable management of local wild stocks, namely by prohibiting collection of snails during the spawning season.

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“…2) The regionalization method, adapted from (Souissi et al, 2000), was used to address spatio-temporal heterogeneity. This numerical analysis method for time series is based on successive Principal Component Analyses (PCA) and cluster analyses.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Souissi et al (2000) had developed the 'regionalization method' in this way. Some amelioration of the method was done, in particular to test the significant of the groups found by the final cluster using the pv-clust method.…”

Section: Statistical Approachmentioning

confidence: 99%

Variability of fresh- and salt-water marshes characteristics on the west coast of France: A spatio-temporal assessment

et al. 2011

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International audienceThe degradation of water quality and the multiple conflicts of interest between users make marsh restoration very important. A Water Quality Evaluation System (WQES) was developed for river systems by the European Water Framework Directive (WFD). Some form of biologically-based, habitat-specific reference standard seems absolutely essential for wise management and stewardship of marsh ecosystems. The goal of this study was to develop a statistical method to define and to characterize a water body typology for drained marshes of the Charente-Maritime wetlands on the French Atlantic coast, placing particular emphasis on environmental factors as hydraulic functioning, human activities and pedological substratum. The Charente-Maritime marshes represent a good field study because of his high diversity of types of marshes and of anthropogenic activities in a restrictive area thus erasing spatial climatic effect (latitude effect). The statistical method developed here had permitted to define and characterize 12 different water bodies, 7 in freshwater (F1 to F7) and 5 in salt water marshes for the Charente-Maritime area. This typology demonstrated an important link between the size catchment area, nitrate concentrations, and leaching of precipitation from cultured soils. Even though the Charente-Maritime marshes are strongly impacted by humans, they may still retain the ability to remove nitrate. The increasing gradient of water renewal in the freshwater marshes from F1 to F7 explained the decreasing gradient of eutrophication. A better management of the hydrodynamic of the marshes can avoid eutrophication risk on the coastal sea area. Reliance on the WFD parameter set necessarily placed limits on the kinds of interpretations that could be made and on the study's potential contribution to the basic science of marshes. Ecologically-based insights regarding both external flows (links between ecosystems, meta-ecosystem theory) and internal flows (structure of the planktonic food web) seem an essential prerequisite for further advances in the study of marsh ecosystems

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Spatial characterization of nutrient dynamics in the Bay of Tunis (south-western Mediterranean) using multivariate analyses: consequences for phyto- and zooplankton distribution

Cited by 52 publications

References 19 publications

Effects of the Operating Nuclear Power Plant on Marine Ecology and Environment - A Case Study of Daya Bay in China

Effects of the Operating Nuclear Power Plant on Marine Ecology and Environment - A Case Study of Daya Bay in China

Relative growth and reproductive cycle in two populations of Bolinus brandaris (Gastropoda: Muricidae) from northern Tunisia (Bizerta Lagoon and small Gulf of Tunis)

Variability of fresh- and salt-water marshes characteristics on the west coast of France: A spatio-temporal assessment

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