Seasonal dynamics of plankton communities coupled with environmental factors in a semi arid area: Sidi Sad reservoir (Center of Tunisia)

Sellami, Ikbel; Romdahane, SB; Guermazi, Wassim; Bour, ME; Hamza, Asma; Mhamdi, MA; Pinel‐Alloul, Bernadette; Aleya, Lotfi; Ayadi, Habib

doi:10.5897/ajb11.2145

Cited by 7 publications

(2 citation statements)

References 41 publications

(42 reference statements)

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“…Specifically, phytoplankton experience maturity during the high water season (July to September), and then gradually die during the low water season (October to November). Moreover, the warm temperatures during those periods can promote the diversity and appearance of phytoplankton in semiarid areas (Sellami et al, 2012). The development of cyanobacteria occurs in autumn, which results in peak values as a consequence of nutrient replenishment (Xia et al, 2004;Abrantes et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Long-term Water Quality Variations and Chlorophyll a Simulation with an Emphasis on Different Hydrological Periods in Lake Baiyangdian, Northern China

Wang

Zhao

et al. 2012

J ENV INFORM

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Eutrophication and water quality degradation comprise one of the most important environmental problems associated with protecting freshwater. Here, systematical analyses of trends, qualitative and quantitative analyses of water quality variables, and simulations of eutrophication were conducted to evaluate biochemical oxygen demand (BOD), total phosphorus (TP), total nitrogen (TN), dissolved oxygen (DO), chlorophyll a (Chl a), and Secchi disk data (SD) based on separate hydrological periods to enhance our understanding of lake ecosystem restoration. Long-term trends were identified using seasonal-trend decomposition with local error sum of squares, while non-supervised artificial neural networks were used to identify qualitative characteristics, and quantitative characteristics were measured using statistical analyses. Numerical simulation of Chl a by the hybrid evolutionary algorithm provided a theoretical solution for ecological warnings. The results were as follows: (1) declining trends in BOD, TP, TN, DO and Chl a were observed during long-term seasonal decomposition after December 2006, but SD increased after June 2003; (2) partitioned K-means maps revealed quantitative characteristics with heterogeneous changes during three hydrological periods, with BOD, TN, SD and Chl a showing the highest clustering quality; (3) BOD and DO showed clear relative hierarchies when compared with other parameters based on quantitative analysis; (4) Chl a simulation revealed heterogeneous changes in the three hydrological periods, and sensitivity analyses indicated that BOD was highly sensitive to Chl a, but TP was not. The sensitivities of other parameters changed during different hydrological periods. The methods described here can be used as preliminary management tools for degraded lakes.

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Section: Discussionmentioning

confidence: 99%

Long-term Water Quality Variations and Chlorophyll a Simulation with an Emphasis on Different Hydrological Periods in Lake Baiyangdian, Northern China

Wang

Zhao

et al. 2012

J ENV INFORM

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“…The positive correlations between the reported amounts of Total Nitrogen and Total Phos-phorus confirm the problem of environmental enrichment and its degradation. The nitrogen and phosphorus compounds are used to properly assess the water quality [13] [55]. Chlorophyll a concentrations are determined by nitrogen compounds and remain above the limit of 40 µg•L −1 characterizes eutrophic environments.…”

Section: Water Quality Status Of Nokoue Lakementioning

confidence: 99%

Can Macroinvertebrate Assemblage Changes Be Used as Biological Indicator of Water Quality of the Nokoue Lake (Benin)?

Odountan¹,

Abou²

2015

JEP

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Investigations on biological capacity of water quality of macroinvertebrate community are very uncommon, and such as the amount of information available on the Nokoue Lake (the largest lake of Benin) is very limited. This information gap needs to be filled for better management of the Nokoue Lake. The goal of this study was to evaluate the possibility of using the macroinvertebrate community structures in Nokoue Lake and the environmental factors responsible for the maintenance of these structures. Nokoue Lake was studied over three months, during high flood period in which time subsurface water and macroinvertebrate samples were collected and analyzed. A study showed that the macroinvertebrate assemblages was done according to ecological gradients as pH, conductivity, TDS, salinity, chlorophyll a and probably to anthropogenic actions (nutriments). Better than the percentage of insects, the percentage of Chironomidae informed very well about macroinvertebrate assemblages. To assess the biological health of the environment, the Family Biotic Index (FBI) turns out to be more appropriate than diversity indices that do not take into account the intermediate pollution. Organic pollution revealed by the FBI probably affects the aquatic life.

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Factors controlling phytoplankton dynamics in an arid reservoir in Tunisia (case of Sidi Saad dam)

Mabrouk

Hamza²,

Mansour

2021

Environ Monit Assess

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Seasonal dynamics of plankton communities coupled with environmental factors in a semi arid area: Sidi Sad reservoir (Center of Tunisia)

Cited by 7 publications

References 41 publications

Long-term Water Quality Variations and Chlorophyll a Simulation with an Emphasis on Different Hydrological Periods in Lake Baiyangdian, Northern China

Long-term Water Quality Variations and Chlorophyll a Simulation with an Emphasis on Different Hydrological Periods in Lake Baiyangdian, Northern China

Can Macroinvertebrate Assemblage Changes Be Used as Biological Indicator of Water Quality of the Nokoue Lake (Benin)?

Factors controlling phytoplankton dynamics in an arid reservoir in Tunisia (case of Sidi Saad dam)

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