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Impact of a river flash flood on microbial carbon and nitrogen production in a Mediterranean Lagoon (Thau Lagoon, France) 5
Fouilland, E.; Trottet, A.; Bancon-montigny, C.; Bouvy, M.; Le Floc'H, E.; Gonzalez, Jean-louis; Hatey, E.; Mas, S.; Mostajir, B.; Nouguier, J.; Pecqueur, D.; Rochelle-newall, E.; Rodier, C.; Roques, C.; Salles, C.; Tournoud, M. -g.; Vidussi, F..
Over half of the total nitrogen, phosphorus, silicate and dissolved organic carbon (DOC) loading was discharged from the Wile River into the Thau Lagoon waters within the first five days of what was considered to be the autumn flash flood period. Such loads represented about 8% and 3% of the yearly averaged total nitrogen and phosphorus load in Thau Lagoon, respectively. Although this event affected >20% of the total lagoon volume, river trace metal loads contributed apparently only weakly to the increase in labile trace metal concentrations in the lagoon surface waters. Differences between theoretical dilution values and observed values were also noticed for phosphate, silicate and dissolved organic carbon (DOC) concentrations. DOC losses (10-50%)...
Tipo: Text Palavras-chave: River discharge; Phytoplankton and bacteria production; DIN uptake rates; Metal contaminants; Mediterranean coastal waters.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00130/24165/22492.pdf
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Plankton food-web functioning in anthropogenically impacted coastal waters (SW Mediterranean Sea): an ecological network analysis 5
Meddeb, Marouan; Grami, Boutheina; Chaalali, Aurelie; Haraldsson, Matilda; Niquil, Nathalie; Pringault, Olivier; Hlaili, Asma Sakka.
The study is the first attempt to (i) model spring food webs in three SW Mediterranean ecosystems which are under different anthropogenic pressures and (ii) to project the consequence of this stress on their function. Linear inverse models were built using the Monte Carlo method coupled with Markov Chains to characterize the food-web status of the Lagoon, the Channel (inshore waters under high eutrophication and chemical contamination) and the Bay of Bizerte (offshore waters under less anthropogenic pressure). Ecological network analysis was used for the description of structural and functional properties of each food web and for inter-ecosystem comparisons. Our results showed that more carbon was produced by phytoplankton in the inshore waters (966–1234...
Tipo: Text Palavras-chave: Food-web modelling; Ecological network analysis; Mediterranean coastal waters; Plankton ecology.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00427/53813/54782.pdf
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