Stable Isotopes and Gut Analyses to Determine Feeding Relationships in Saltmarsh Macroconsumers

Créach, Véronique; Schricke, Marie-Thérèse; Bertru, G.; Mariotti, André

doi:10.1006/ecss.1996.0147

Cited by 113 publications

(80 citation statements)

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“…However, the dependence on this food source showed clear seasonal and speciesspecific variability. The trophic importance of microalgae in benthic macrophyte systems was confirmed in recent stable isotope studies (Créach et al 1997, Connolly et al 2005, Douglass 2008, Jaschinski et al 2008. Our results support the assumption that fresh macrophyte leaves are of minor relevance for the nutrition of mesograzers in temperate seagrass systems (Lepoint et al 2000, Moncreiff & Sullivan 2001, Douglass 2008, Jephson et al 2008.…”

Section: Discussionsupporting

confidence: 88%

Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Jaschinski¹,

Brepohl²,

Sommer³

2011

Mar. Ecol. Prog. Ser.

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Section: Discussionsupporting

confidence: 88%

Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Jaschinski¹,

Brepohl²,

Sommer³

2011

Mar. Ecol. Prog. Ser.

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“…The Atriplex portulacoides and Elymus athericus communities are highly productive, generating a large quantity of organic matter (Lefeuvre et al, 2000) that can provide habitat and food for dense communities of marsh dwelling detritivorous crustaceans such as Orchestia gammarella (Créach et al, 1997). However, both availabilities and accessibilities of O. gamarella were significantly lower in invaded habitats than in natural habitats.…”

Section: Discussionmentioning

confidence: 99%

“…and sea bass Dicentrarchus labrax in the MontSaint-Michel Bay (Laffaille et al, 1998(Laffaille et al, , 2002. Salt marsh primary production is essentially assimilated by many invertebrates, and especially by Orchestia gammarella and mysids in European salt marshes (Zagursky and Feller, 1985;Créach et al, 1997). Tidal creeks seem to act as a drainage area where the secondary production (i.e.…”

Section: Discussionmentioning

confidence: 99%

Does the invasive plant Elymus athericus modify fish diet in tidal salt marshes?

Laffaille

Pétillon

Parlier

et al. 2005

Estuarine, Coastal and Shelf Science

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International audienceThe invasion of Mont-Saint-Michel Bay salt marshes (France) by a grass species (Elymus athericus) has led to important changes in vegetation cover, which is likely to modify the habitat for many invertebrates. Some of them constitute the main food items for several fish species, such as young sea bass (Dicentrarchus labrax) and sand goby (Pomatoschistus minutus), that feed in salt marsh creeks during high tides. As a result, fish nursery functions of salt marshes could be modified by the E. athericus invasion. In order to test this hypothesis, gut contents of the two most abundant fish species (sea bass and sand goby) were compared before and after E. athericus invasion in the same salt marsh creek and using the same methodology. The accessibility and availability of the main food item, the semi-terrestrial amphipod Orchestia gammarella, were estimated and compared between invaded (dominated by E. athericus) and original areas (dominated by Atriplex portulacoides). Gut content analysis showed a significantly greater percentage of fish leaving with empty guts from E. athericus areas than from A. portulacoides areas. The sea bass diet composition study showed a major shift in the relative importance of the main food items: before E. athericus invasion, diets were dominated by the semi-terrestrial species O. gammarella, whereas after the E. athericus invasion they were dominated by a marine mysid Neomysis integer. The same trend was found for sand gobies, with a shift of the main food item from O. gammarella before invasion to the polychaete Hediste diversicolor after invasion. These trophic changes may be explained by the lower accessibility and availability of O. gammarella in invaded communities than in natural ones. The E. athericus invasion, observed throughout northern Europe, is thus likely to disturb trophic function of natural salt marshes for fish. This preliminary study of the E. athericus invasion is also an illustration that invasive species are an urgent problem in conservation biology

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“…In the salt marsh (dominated by Atriplex portulacoides) of the Mont Saint-Michel bay, less than 1% of halophytic production is exported from salt marshes to intertidal mudflats as macrodetritus (Lefeuvre et al, 2000). Furthermore, fast decomposition processes are observed on marsh and creek surface sediment: under favourable conditions, the halophytic detritus biomass could disappear in 30 days, due to the high bacterial activity (Créach et al, 1997). This organic matter is rapidly decomposed as nutrients in dissolved organic matter on the production site (Bouchard et al, 1998;Lefeuvre et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Can Thin-lipped Mullet Directly Exploit the Primary and Detritic Production of European Macrotidal Salt Marshes?

Laffaille¹,

Feunteun²,

Lefebvre³

et al. 2002

Estuarine, Coastal and Shelf Science

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Juveniles and adults (>100 mm) of Liza ramada colonize macrotidal salt marsh creeks of Mont Saint-Michel bay (France) between March and November, during spring tide floods (43% of the tides) and return to coastal waters during the ebb. This fish species actively feeds during its short stay in the creek (from 1 to 2 h). On average, each fish swallows sediment including living and inert organic matter, which amounts to 8% of its fresh body weight. Their diet is dominated by small benthic items (especially diatoms and salt marsh plant detritus), that correspond to the primary and detritic production of this macrotidal salt marsh creek. Despite very short submersion periods, mullets filter and ingest large quantities of sediment and concentrated organic matter (on average organic matter in stomach content is 31%) produced by these coastal wetlands. European salt marshes are thus shown to act as trophic areas for mullets, which are well adapted to this constraining habitat which is only flooded for short periods during spring tides.

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Stable Isotopes and Gut Analyses to Determine Feeding Relationships in Saltmarsh Macroconsumers

Cited by 113 publications

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Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Does the invasive plant Elymus athericus modify fish diet in tidal salt marshes?

Can Thin-lipped Mullet Directly Exploit the Primary and Detritic Production of European Macrotidal Salt Marshes?

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Stable Isotopes and Gut Analyses to Determine Feeding Relationships in Saltmarsh Macroconsumers

Cited by 113 publications

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Seasonal variation in carbon sources of ­mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Seasonal variation in carbon sources of ­mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Does the invasive plant Elymus athericus modify fish diet in tidal salt marshes?

Can Thin-lipped Mullet Directly Exploit the Primary and Detritic Production of European Macrotidal Salt Marshes?

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Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses

Seasonal variation in carbon sources of mesograzers and small predators in an eelgrass community: stable isotope and fatty acid analyses