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| Faunal engineering stimulates landscape-scale accretion in southeastern US salt marshes Crotty, S.M.; Pinton, D.; Canestrelli, A.; Fischman, H.S.; Ortals, C.; Dahl, N.R.; Williams, S.; Bouma, T.J.; Angelini, C. (2023). Faunal engineering stimulates landscape-scale accretion in southeastern US salt marshes. Nature Comm. 14(1): 881. https://dx.doi.org/10.1038/s41467-023-36444-w
Bijhorende data:
In: Nature Communications. Nature Publishing Group: London. ISSN 2041-1723; e-ISSN 2041-1723, meer
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| Abstract |
The fate of coastal ecosystems depends on their ability to keep pace with sea-level rise—yet projections of accretion widely ignore effects ofengineering fauna. Here, we quantify effects of the mussel , Geukensia demissa, on southeastern US saltmarsh accretion. Multi-season and -tidal stage surveys, in combination with field experiments, reveal that deposition is 2.8-10.7-times greater on mussel aggregations than any other marsh location. Our Delft-3D-BIVALVES model further predicts that mussels drive substantial changes to both the magnitude (±<0.1 cm·yr−1) and spatial patterning of accretion at marsh domain scales. We explore the validity of model predictions with a multi-year creekshed mussel manipulation of >200,000 mussels and find that this faunal engineer drives far greater changes to relative marsh accretion rates than predicted (±>0.4 cm·yr−1). Thus, we highlight an urgent need for empirical, experimental, and modeling work to resolve the importance of faunal engineers in directly and indirectly modifying the persistence of coastal ecosystems globally. |
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