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| Registros recuperados: 10 | |
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| Mouillot, David; Gaillard, Sylvain; Aliaume, Catherine; Verlaque, Marc; Belsher, Thomas; Troussellier, Marc; Chi, Thang. |
| Lagoons are highly productive areas representing more than 50% of the coastline area in Languedoc-Roussillon (South of France, Mediterranean sea). These lagoons are very different in their environmental conditions, human influences, eutrophication levels and aquaculture intensity. Based on macrophyte communities associated with soft substrates, two indices of taxonomic diversity (the "average taxonomic distinctness" (Delta(+)) and the "variation in taxonomic distinctness" (Lambda(+))) were used to discriminate four of these lagoons (Thau, Salse-Leucate, Bages-Sigean and Mauguio). Bages-Sigean presented a significant higher average taxonomic distinctness (p < 0.05) and Salse-Leucate had a significant higher variation in taxonomic distinctness (p <... |
| Tipo: Text |
Palavras-chave: Languedoc Roussillon; Exotic species; Human impact; Eutrophication; Biodiversity. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-748.pdf |
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| Lopes Galasso, Helena; Richard, Marion; Lefebvre, Sebastien; Aliaume, Catherine; Callier, Myriam. |
| Considering the ecological importance and potential value of Hediste diversicolor, a better understanding of its metabolic rate and potential growth rates is required. The aims of this study are: (i) to describe key biometric relationships; (ii) to test the effects of temperature and body size on standard metabolic rate (as measure by oxygen consumption) to determine critical parameters, namely Arrhenius temperature (TA), allometric coefficient (b) and reaction rate; and (iii) to determine the metabolic scope for activity (MSA) of H. diversicolor for further comparison with published specific growth rates. Individuals were collected in a Mediterranean lagoon (France). After 10 days of acclimatization, 7 days at a fixed temperature and 24 h of fasting,... |
| Tipo: Text |
Palavras-chave: Annelida; Deposit-feeder; Oxygen consumption; Allometric coefficient; Arrhenius temperature; Aerobic scope; Growth. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00465/57682/59885.pdf |
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| Maire, Eva; Villeger, Sebastien; Graham, Nicholas A. J.; Hoey, Andrew S.; Cinner, Joshua; Ferse, Sebastian C. A.; Aliaume, Catherine; Booth, David J.; Feary, David A.; Kulbicki, Michel; Sandin, Stuart A.; Vigliola, Laurent; Mouillot, David. |
| Determining whether many functionally complementary species or only a subset of key species are necessary to maintain ecosystem functioning and services is a critical question in community ecology and biodiversity conservation. Identifying such key species remains challenging, especially in the tropics where many species co-occur and can potentially support the same or different processes. Here, we developed a new community-wide scan CWS) approach, analogous to the genome-wide scan, to identify fish species that significantly contribute, beyond the socio-environmental and species richness effects, to the biomass and coral cover on Indo-Pacific reefs. We found that only a limited set of species (51 out of approx. 400, = approx. 13%), belonging to various... |
| Tipo: Text |
Palavras-chave: Ecosystem functioning; Biodiversity; Fish community; Key species; Ecosystem services; Coral reefs. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00452/56388/68019.pdf |
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| Maire, Eva; D'Agata, Stephanie; Aliaume, Catherine; Mouillot, David; Darling, Emily S.; Ramahery, Volanirina; Ranaivoson, Ravaka; Randriamanantsoa, Bemahafaly; Tianarisoa, Tantely F.; Santisy, Abdoul; Cinner, Joshua E.. |
| Rapid degradation of the world’s coral reefs jeopardizes their ecological functioning and ultimately imperils the wellbeing of the millions of people with reef-dependent livelihoods. Ecosystem accessibility is the main driver of their conditions, with the most accessible ecosystems being most at risk of resource depletion. People’s socioeconomic conditions can change as they get further from urban centers and can profoundly influence people’s relationship with the environment. However, the mechanisms through which increasing accessibility from human societies affects natural resources are still unclear. A plausible mechanism through which markets influence the environment is through the socioeconomic changes that tend to accompany accessibility. We used... |
| Tipo: Text |
Palavras-chave: Accessibility; Coral reef fisheries; Fish biomass; Market access; Social-ecological systems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00652/76440/77528.pdf |
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| Derolez, Valerie; Malet, Nathalie; Fiandrino, Annie; Lagarde, Franck; Richard, Marion; Ouisse, Vincent; Bec, Beatrice; Aliaume, Catherine. |
| Thau lagoon is a large Mediterranean coastal lagoons and it supports traditional shellfish farming activities. It has been subject to eutrophication leading to major anoxic events associated with massive mortalities of shellfish stocks. Since the 1970s, improvements have been made to wastewater treatment systems, which have gradually led to oligotrophication of the lagoon. The aim of our study was to determine how the decrease in nutrient inputs resulted in major ecological changes in Thau lagoon, by analysing five decades of time-series (1970–2018) of observations on pelagic and benthic autotrophic communities. We were able to identify two periods during the oligotrophication process. Period 1 (1970–1992) was considered a eutrophic period, characterised... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00629/74068/73521.pdf |
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| Derolez, Valerie; Bec, Beatrice; Munaron, Dominique; Fiandrino, Annie; Pete, Romain; Simier, Monique; Souchu, Philippe; Laugier, Thierry; Aliaume, Catherine; Malet, Nathalie. |
| Tipo: Text |
Palavras-chave: Recovery; Oligotrophication; Coastal lagoons; Urban inputs; Nutrients. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00478/58953/61574.pdf |
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| Lopes Galasso, Helena; Callier, Myriam; Bastianelli, Denis; Blancheton, Jean-paul; Aliaume, Catherine. |
| In aquaculture, it is extremely important to determine the composition of fish farm waste to evaluate its potential impacts and to improve its reuse. Near-infra red spectroscopy (NIRS), an alternative to standard chemical analytical techniques, is a quick non-invasive method to assess physical and chemical composition, reducing the cost of routine analysis. We developed NIRS calibration models for organic matter (OM), total organic carbon (TOC), total organic nitrogen (TON), the carbon/nitrogen ratio (C/N), total phosphorus (TP) and the lipid content of marine fish particulate waste. To obtain a wide range of compositions of fish waste, decomposition time, feed loss, and inter-specific variations were taken into account. The NIRS calibration models were... |
| Tipo: Text |
Palavras-chave: Near infrared spectroscopy; Fish farm waste; Faeces; Dicentrarchus labrax; Chemical composition. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00382/49369/49771.pdf |
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| Derolez, Valerie; Soudant, Dominique; Malet, Nathalie; Chiantella, Claude; Richard, Marion; Abadie, Eric; Aliaume, Catherine; Bec, Beatrice. |
| Mediterranean costal lagoons have been exposed to anthropic eutrophication for decades. Thau lagoon is one of the largest among them and provides many ecosystem services including shellfish farming. Considerable efforts were made between the 1970s and the late 2000s to improve the wastewater treatment systems in the lagoon watershed. A decrease in nutrient inputs to Thau lagoon was subsequently observed, evidence for the start of a recovery process in Thau lagoon, following oligotrophication. This decrease has significant consequences for ecosystem communities, above all primary producers. In our study, we characterised and quantified long-term changes by analysing long monitoring time-series (1998-2016) of phytoplankton biomass, abundance and composition... |
| Tipo: Text |
Palavras-chave: Eutrophication; Oligotrophication; Nutrients; Recovery; Phytoplankton community shift; Mediterranean coastal lagoon. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00629/74063/73514.pdf |
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| Registros recuperados: 10 | |
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