Ribbed Mussel Nitrogen Isotope Signatures Reflect Nitrogen Sources in Coastal Salt Marshes

McKinney, Richard A.; Nelson, Walter G.; Charpentier, Michael A.; Wigand, Cathleen

doi:10.2307/3061067

Cited by 30 publications

(38 citation statements)

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“…In fact, our Δ 15 N ranges for gastropods at Revellata Bay fell within those reported from areas receiving high nitrogen loads in Mediterranean lagoons (Carlier et al 2008) and worldwide, in both freshwater and marine systems (Cabana & Rasmussen 1996, Riera et al 2000, McKinney et al 2001, Tewfik et al 2005 (Table 7). With respect to the relatively low nutrient loads in the Revellata Bay, this unexpectedly strong signal seemed to show a greater than previously thought influence of sewage and/or highlighted the importance of even occasional supplies of anthropogenic nitrogen in a naturally nutrient-limited system.…”

Section: Indicators Of Anthropogenically Derived Nutrientssupporting

confidence: 85%

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Vermeulen

Sturaro

Gobert

et al. 2011

Mar. Ecol. Prog. Ser.

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Increasing human pressure along Mediterranean coastlines raises the need to define sensitive bioindicators that provide an early response to nutrient enrichment. We performed multiscale carbon and nitrogen stable isotope analyses on the limpet Patella caerulea, the snail Monodonta turbinata, epilithic biofilms, and the macroalga Rissoella verruculosa inhabiting the rocky midlittoral zone. Samples were seasonally collected in 2006 from 5 sites exposed to a range of anthropogenic discharges in the Revellata Bay area and in Marseille harbour (France). All bioindicators exhibited strongly elevated δ 15 N values at impacted sites compared to pristine ones, which revealed the biological availability of anthropogenically derived nutrients. Only epilithic biofilms tended to show both the occurrence of nutrient pulses during the tourist season and a δ 13 C response at impacted sites. In contrast to macroalgae, which exhibited a somewhat equivocal signal, gastropods and especially M. turbinata provided the best time-integrated picture of the graduated exposure of the 5 sites to anthropogenic impact. Results also showed first evidence of large isotopic variability at a scale of tens of metres, close to that found at the kilometre scale. The intra-and interspecific isotopic variability in gastropods may be explained by the patchiness of resources and specific morphological and behavioural features, but these factors do not greatly hamper their potential as early bioindicators of wastewater disturbances.

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Section: Indicators Of Anthropogenically Derived Nutrientssupporting

confidence: 85%

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Vermeulen

Sturaro

Gobert

et al. 2011

Mar. Ecol. Prog. Ser.

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“…A similar trend was reported between inner and outer parts of the Ria Formosa lagoon for both muscles and digestive glands of Mytilus galloprovincialis and Ruditapes decussatus (Machás et al 2003). In contrast, McKinney et al (2001) found a significant correlation between δ 15 N in Geukensia demissa mussels and nitrogen derived from anthropogenic activities. As suspension-feeders, Manila clams incorporate diet components linked to primary production, which depend on nutrient inputs within coastal systems.…”

Section: Trophic Enrichment In Manila Clam Musclesupporting

confidence: 82%

Determination of diet in Manila clams by spatial analysis of stable isotopes

Dang¹,

Sauriau²,

Savoye³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Muscle tissue turnover rates are uncertain and depend on size class. Six-year-old blue mussels, Mytilus edulis, can take 3 yr for full muscle turnover (Hawkins 1985), while ribbed mussels, Geukensia demissa, can reach equilibrium with their food after 206 to 397 d (McKinney et al 2001). The isotope composition of mussels from our 5 mo (150 d) time period, thus, reflects transition values intermediate to the isotopic values of natural mussels inhabiting the original and new marsh environments.…”

Section: Cage and Temporal Effectsmentioning

confidence: 99%

Restoration trajectories and food web linkages in San Francisco Bays estuarine marshes: a manipulative translocation experiment

Howe¹,

Simenstad²

2007

Mar. Ecol. Prog. Ser.

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We measured δ 13 C, δ 15 N and δ 34 S signatures of natural and translocated mussels Ischadium demissum to identify food web source differences among estuarine marshes displaying various stages of restorative development. We hypothesized that mussels inhabiting younger marshes would be more dependent on allochthonous organic matter sources, while those inhabiting mature marshes would depend on autochthonous sources. Mussels collected from an undisturbed (reference) marsh located within the Napa River estuarine complex in San Francisco Bay were translocated to a series of restoring marsh sites located within the same river system. The isotopic composition of naturally growing mussels was compared with translocated mussels, which were incubated in restoring sites for 5 and 7 mo. Measurements of δ 13 C, δ 15 N, and δ 34 S indicated differences in food web sources supporting I. demissum among the 4 marsh sites. A strong cage effect was detected during the initial 5 mo collection interval, indicating that translocated mussels had yet to equilibrate with their new environments. Multiple source mixing model analysis indicated that C 3 emergent vascular plants and brackish phytoplankton contributed most of the organic matter consumed by I. demissum over both time periods, but that mussels collected from the downstream sites exhibited higher dependence upon vascular plant detritus. Bay produced phytoplankton contributed very little to I. demissum diets, suggesting that the pelagic waters of San Francisco Bay have less influence on marsh food web dynamics than previously anticipated. The results of this experiment show that food web pathways are strongest at intermediate scales; they can be relatively short and unique to specific marshes along the estuarine gradient, but similarities in mussel diets among marshes in close proximity to one another suggests inter-marsh exchange of organic matter. It is, therefore, likely that food webs in young restoration sites depend upon organic matter subsidies from neighboring marshes, rather than from San Francisco Bay. KEY WORDS: Restoration · Mussels · Ischadium demissum · Food web · Estuarine marshes · San Francisco Bay Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 351: [65][66][67][68][69][70][71][72][73][74][75][76] 2007 ocean (Odum 2000). A primary goal of estuarine marsh restoration is to recover those ecological functions, such as cross boundary energy subsidies, which enhance coastal production of fish and wildlife (Kneib 2003, McCay et al. 2003. As recently noted by Wozniak et al. (2006), who directly examined carbon flows that run through restoring salt-marsh food webs, the majority of post-restoration studies limit their focus to structural differences between reference and restoring sites and do not address functional trajectories associated with marsh restoration.In contrast to the estuarine outwelling hypothesis (Odum 2000), in which tidal waters export a mix of riverine, marine, terrestrial, and marsh deriv...

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Ribbed Mussel Nitrogen Isotope Signatures Reflect Nitrogen Sources in Coastal Salt Marshes

Cited by 30 publications

References 0 publications

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Determination of diet in Manila clams by spatial analysis of stable isotopes

Restoration trajectories and food web linkages in San Francisco Bays estuarine marshes: a manipulative translocation experiment

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Ribbed Mussel Nitrogen Isotope Signatures Reflect Nitrogen Sources in Coastal Salt Marshes

Cited by 30 publications

References 0 publications

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Potential early indicators of anthropogenically derived nutrients: a multiscale stable isotope analysis

Determination of diet in Manila clams by spatial analysis of stable isotopes

Restoration trajectories and food web linkages in San Francisco Bays estuarine marshes: a manipulative translocation experiment

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Restoration trajectories and food web linkages in San Francisco Bays estuarine marshes: a manipulative translocation experiment