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| Registros recuperados: 118 | |
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| Mascart, Thibaud; De Troch, Marleen; Remy, François; Michel, Loic; Lepoint, Gilles. |
| Benthic copepods dominate meiofaunal communities from marine phytodetritus, both in terms of numerical abundance and species diversity. Nevertheless, ecological factors driving copepod co-existence and population dynamics are still largely unknown. Here, we aimed to explore feeding habits of four copepod species commonly found in Mediterranean seagrass detritus accumulations, representing distinct eco-morphotypes (planktonic, phytal, epibenthic and mesopsammic). Joint use of fatty acid and stable isotope trophic markers showed that co-occurring harpacticoid copepods have diversified diets. Contrary to what was expected, microphytobenthos does not serve as their main food source. Instead, we found evidence from both techniques that major food items include... |
| Tipo: Text |
Palavras-chave: Macrophytodetritus; Posidonia oceanica; Meiofauna; Stable isotopes; Fatty acids; Isotopic niche; Mixing models; Mediterranean Sea. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00440/55187/60472.pdf |
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| Dubois, Stanislas; Orvain, Francis; Marin Leal, Julio César; Ropert, Michel; Lefebvre, Sébastien. |
| Oyster culture structures support a host of epibionts belonging to the same suspension-feeding guild, which are considered to be potential competitors for food with cultivated oysters. In an intertidal shellfish ecosystem on the northern French coast, an approach based on stable isotopes (C-13 and N-15) was used to investigate intra- and interspecific food resource partitioning among cultivated oysters and the main associated wild sessile epibionts such as polychaetes, barnacles, mussels and ascidians. The main objective of the present study was to determine inter- and intraspecific food partitioning, along with small-scale spatial variability, within the guild of suspension feeders. We demonstrated that interspecific competition was limited among... |
| Tipo: Text |
Palavras-chave: Trophic plasticity; Spatial variability; Stable isotopes; Sessile epibionts; Oysters; Shellfish. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2626.pdf |
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| Le Pape, Olivier; Moderan, J.; Beaunee, G.; Riera, Pascal; Nicolas, Delphine; Savoye, N.; Harmelin-vivien, M.; Darnaude, A. M.; Brind'Amour, Anik; Le Bris, H.; Cabral, H.; Vinagre, C.; Pasquaud, S.; Franca, S.; Kostecki, Caroline. |
| Coastal and estuarine nursery grounds are essential habitats for sustaining flatfish stocks since only these shallow and productive areas provide the high food supply that allows maximizing juvenile growth and survival in most flatfish species. However, the main organic matter sources at the basis of benthic food webs might differ drastically between estuarine nursery grounds under strong freshwater influences, where food webs are mainly supported by continental organic matter, and coastal ecosystems under limited freshwater influence, where the local marine primary production is the main source of carbon for the benthos. To better understand the links between continental inputs to the coastal zone and stock maintenance in the highly prized common sole,... |
| Tipo: Text |
Palavras-chave: Nursery ground; Flatfish; Organic matter origin; Stable isotopes; Mixing model SIAR. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00118/22889/20796.pdf |
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| Rossi, Francesca; Colao, Elodie; Jose Martinez, Maria; Klein, Judith C.; Carcaillet, Frederique; Callier, Myriam; De Wit, Rutger; Caro, Audrey. |
| Sulphur-oxidising endosymbiont-bearing bivalves often inhabit seagrass meadows, where they can control sulphide levels and variably contribute to carbon cycling, by feeding on endosymbiotic bacteria and/or on particulate organic matter from the water column. The patterns of variability in their feeding mode and their spatial distribution within the seagrass meadows are however poorly studied. Seagrass beds form naturally patchy habitats with seagrass-sand edges that may have variable effects on different organisms. The present study aims at understanding differences in feeding mode and abundance of the endosymbiont-bearing bivalve Loripes lacteus (sensu Poli, 1791) as well as the physiological conditions of its endosymbiotic populations between edge and... |
| Tipo: Text |
Palavras-chave: Bivalve; Food web; Mediterranean; Seagrass; Stable isotopes; Symbiosis. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00138/24911/26373.pdf |
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| Serragiotto, Mariana Cristina; Universidade Estadual de Maringá; Souza Filho, Edvard Elias de; Universidade Estadual de Maringá; Couto, Edivando Vitor do; Universidade Estadual de Maringá; Manetta, Gislaine Iachstel; Universidade Estadual de Maringá; Benedito, Evanilde; Universidade Estadual de Maringá. |
| The present study examined the influence of the availability of riparian vegetation and C3 emergent aquatic macrophytes on carbon assimilation by Prochilodus lineatus. The vegetal cover of these producers, available at 30 m of the bank, for the terrestrial ecosystem of the rivers Baia, Ivinheima and Paraná, was quantified with the image processing Landsat 5 TM, of the year 2000, period of sampling of the biological material at each river. The assimilation of the energy sources (riparian vegetation and C3 aquatic macrophytes, C4 aquatic macrophytes, periphyton, and phytoplankton) by P. lineatus was determined by analysis of stable carbon isotopes (δ13C). The area of vegetal cover was estimated at 1,017 km2 in the Ivinheima river, 669 km2 in the Paraná... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Primary producer; Remote sensing; Stable isotopes; Fish Ecologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19820 |
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| Guillermic, Maxence; Lalonde, Stefan; Hendry, Katharine R.; Rouxel, Olivier. |
| Although dissolved concentrations of germanium (Ge) and silicon (Si) in modern seawater are tightly correlated, uncertainties still exist in the modern marine Ge cycle. Germanium stable isotope systematics in marine systems should provide additional constraints on marine Ge sources and sinks, however the low concentration of Ge in seawater presents an analytical challenge for isotopic measurement. Here, we present a new method of pre-concentration of inorganic Ge from seawater which was applied to measure three Ge isotope profiles in the Southern Ocean and deep seawater from the Atlantic and Pacific Oceans. Germanium isotopic measurements were performed on Ge amounts as low as 2.6 ng using a double-spike approach and a hydride generation system coupled to... |
| Tipo: Text |
Palavras-chave: Stable isotopes; Germanium; Silicon; Sponges; Southern Ocean; Chemical oceanography. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49956/50529.pdf |
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| Wesselingh, F.P.; Kaandorp, R.J.G.; Vonhof, H.B.; Räsänen, M.E.; Renema, W.; Gingras, M.. |
| The Miocene Pebas Formation from the section Santa Rosa de Pichana (Loreto, Peru) was investigated using a combination of analyses of sedimentary facies, molluscan communities and taphonomy, and stable isotopes of both entire shells and growth bands in bivalves. Three sequences, comprising a succession of transgressive, maximum flooding and regressive/prograding intervals, are documented. Molluscs are most common in the transgressive/highstand intervals and are almost absent in regressive/prograding intervals. The fauna is dominated by endemic Pebasian species, such as Pachydon and Dyris spp. The nature of the deposits as well as the availability of oxygen varied in a predictable way within each of the sequences and determined the nature of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Miocene; Amazonia; Palaeoecology; Sedimentology; Stable isotopes; 38.22; 42.73. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/209732 |
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| Lefebvre, Sebastien; Dubois, Stanislas. |
| Trophic enrichment factors (TEF) are essential to properly and fruitfully explore stable isotope analysis in ecology. And so is the time window of food source integration, usually estimated with the turnover rates (lambda) of isotopic incorporation. On the road to provide ecologists with a general and reliable method to obtain TEF and turnover rates for diet reconstruction, isotopists start realizing that those two parameters are ultimately linked with the physiological state of organisms and that metabolic pathways are of primary importance to understand the large ranges in TEF values. In this study, we used a diet-switching experiment for seven small marine invertebrates. Changes in isotopic compositions were fitted to an exponential decay model to... |
| Tipo: Text |
Palavras-chave: Stable isotopes; Growth rates; Diet-tissue discrimination; Dynamic energy budget; Trophic fractionation; Catabolism. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00387/49856/52266.pdf |
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| Sernagiotto,ER; Ducatti,C; Sartori,JR; Stradiotti,AC; Maruno,MK; Araujo,PC; Carvalho,FB; Pezzato,AC. |
| The objective of the present study was to trace the inclusion of poultry offal meal (POM) in the diet of meat-type quails reared for a long period using the technique of stable isotopes. A number of 320 quails were randomly distributed into eight treatments: vegetable diet (T1), and a diet containing 8% POM were fed until the end of the experimental period (T2) or replaced by the vegetable diet on day 42 (T3), 56 (T4), 70 (T5), 84 (T6), 98 (T7), and 112 (T8). Breast muscle samples were collected from four birds randomly selected per treatment every 14 days. The obtained isotope results were submitted to multivariate analysis of variance (MANOVA) with the aid of the GLM procedure of statistical SAS program. Treatments were different from T1 when birds were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon-13; Quail production; Stable isotopes; Nitrogen-15; Traceability. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100011 |
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| Registros recuperados: 118 | |
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