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| DOI | 10.1016/J.SCITOTENV.2024.175910 | ||||
| Año | 2024 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Estimates suggest that the amount of plastic litter discarded in the ocean is several times greater than what remains floating at the sea surface, raising questions about the fate of this marine debris. Fouling-induced sinking of plastic litter is one of the proposed mechanisms responsible for this mass difference. While some of this 'missing' plastic mass may be explained by the effects of fouling, it has also been hypothesized that sinking litter may return to the surface after benthic organisms consume the biofouling. However, this hypothesis has never been tested. The present study evaluated the structure and biomass of the fouling community in response to benthic predation in both summer and winter seasons. Floating PVC plates were installed during winter and summer in central Chile (36(degrees)S) until the growing biofouling community caused them to sink. Plates were then moved to the seabed, where they were exposed to benthic predation, while control plates were maintained in a mesh cage impeding predator access. In summer, all plates recovered their buoyancy, while in the winter only 60 % recovered buoyancy. All caged control samples remained on the bottom in both seasons. The community structure differed both in the treatments and across the seasons, with plates that recovered buoyancy initially being dominated by Ulva sp. and Ciona robusta. Conversely, plates that did not refloat were mainly covered by species resistant to predation such as Pyura chilensis, Austromegabalanus psittacus, and Balanus laevis. Thus, fouling community structure influences how predation facilitates buoyancy recovery, because not all epibionts can be consumed by predators. While previous studies had shown how fouling organisms cause sinking of floating litter, this is the first study to provide experimental evidence that predation can reverse this process and allow litter to resurface and become again available as dispersal vectors for native and invasive species.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | PINOCHET-ROMERO, JAVIER ANTONIO | Hombre |
Universidad de Concepción - Chile
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| 2 | Thiel, Martin | Hombre |
Smithsonian Environm Res Ctr - Estados Unidos
Universidad Católica del Norte - Chile Núcleo Milenio de Ecología y Manejo Sustentable de Islas Oceánicas - Chile Smithsonian Environmental Research Center - Estados Unidos Facultad de Ciencias del Mar - Chile |
| 3 | URBINA-FONERON, MAURICIO ANDRONICO | Hombre |
Universidad de Concepción - Chile
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| Fuente |
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| Universidad de Concepción |
| FONDECYT |
| Anillo |
| Fondo Nacional de Desarrollo Científico y Tecnológico |
| Postgraduate Department of the Universidad de Concepcion, Chile |
| Agradecimiento |
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| This work was funded by grants Fondecyt 1210071 and ANILLO ACT210073 to MAU. JP expresses gratitude for the tuition and maintenance scholarship received from the Postgraduate Department of the Universidad de Concepcion, Chile. He also thanks Andre <acute accent> s Troncoso and Sergio Marileo for their essential logistical support in the installation and maintenance of the plate systems in Dichato. |
| This work was funded by grants Fondecyt 1210071 and ANILLO ACT210073 to MAU. JP expresses gratitude for the tuition and maintenance scholarship received from the Postgraduate Department of the Universidad de Concepcion, Chile. He also thanks Andr\u00E9s Troncoso and Sergio Marileo for their essential logistical support in the installation and maintenance of the plate systems in Dichato. |