Consulta: creatorFacets:"Aliaume, Catherine"
Registros recuperados: 10
Data/hora: 07/06/2024 08:56:53

Two decades of oligotrophication: Evidence for a phytoplankton community shift in the coastal lagoon of Thau (Mediterranean Sea, France)
Provedor de dados: 5
Autores: 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

Ability of taxonomic diversity indices to discriminate coastal lagoon environments based on macrophyte communities
Provedor de dados: 5
Autores: 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 &lt; 0.05) and Salse-Leucate had a significant higher variation in taxonomic distinctness (p &lt;...
Tipo: Text
Palavras-chave: Languedoc Roussillon; Exotic species; Human impact; Eutrophication; Biodiversity.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-748.pdf

High-rate algal pond treatment for water reuse in an integrated marine fish recirculating system: effect on water quality and sea bass growth
Provedor de dados: 5
Autores: Deviller, Genevieve; Aliaume, Catherine; Franco, Miguel; Casellas, Claude; Blancheton, Jean-paul.
A high-rate algae pond (HRAP) was tested as a second loop of water treatment in a recirculating fish rearing system to reduce water requirements and nutrient discharge levels. Three duplicated groups of sea bass (mean initial body weight 3 5 I I g) were reared under different system conditions (flow-through system, recirculating system and recirculating system with HRAP) for I year. Fish survival rate was higher in the system with HRAP, and their mean body weight was statistically higher (p&lt;0.05) during the month of maximal climatic conditions for algae photosynthesis. After 266 days of experiment, mean fish weight was significantly higher (p&lt;0.05) in the flow-through system than in the recirculating systems. Final fish weight was 15% higher in the...
Tipo: Text
Palavras-chave: Sustainability; Phosphorus; Nitrogen; Fish growth; Recirculation; High rate algae pond.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-620.pdf

Fifty years of ecological changes: Regime shifts and drivers in a coastal Mediterranean lagoon during oligotrophication
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74068/73521.pdf

Body size and temperature effects on standard metabolic rate for determining metabolic scope for activity of the polychaete     Hediste (Nereis) diversicolor
Provedor de dados: 5
Autores: 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

The potential of near infrared spectroscopy (NIRS) to measure the chemical composition of aquaculture solid waste
Provedor de dados: 5
Autores: 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

Recovery trajectories following the reduction of urban nutrient inputs along the eutrophication gradient in French Mediterranean lagoons
Provedor de dados: 5
Autores: 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

Disentangling the complex roles of markets on coral reefs in northwest Madagascar
Provedor de dados: 5
Autores: 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

Community-wide scan identifies fish species associated with coral reef services across the Indo-Pacific
Provedor de dados: 5
Autores: 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

Biodiversité et dynamique des communautés biologiques en milieu marin
Provedor de dados: 5
Autores: Fromentin, Jean-marc; Aliaume, Catherine; Lebaron, Philippe.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00486/59816/62959.pdf