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How plastic litter sunk by biofouling recovers buoyancy - The role of benthic predation
Indexado
WoS WOS:001312741300001
Scopus SCOPUS_ID:85203010979
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


Abstract



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.

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Disciplinas de Investigación



WOS
Environmental Sciences
Scopus
Waste Management And Disposal
Pollution
Environmental Engineering
Environmental Chemistry
SciELO
Sin Disciplinas

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Publicaciones WoS (Ediciones: ISSHP, ISTP, AHCI, SSCI, SCI), Scopus, SciELO Chile.

Colaboración Institucional



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Autores - Afiliación



Ord. Autor Género Institución - País
1 PINOCHET-ROMERO, JAVIER ANTONIO Hombre Universidad de Concepción - Chile
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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Financiamiento



Fuente
Universidad de Concepción
FONDECYT
Anillo
Fondo Nacional de Desarrollo Científico y Tecnológico
Postgraduate Department of the Universidad de Concepcion, Chile

Muestra la fuente de financiamiento declarada en la publicación.

Agradecimientos



Agradecimiento
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.

Muestra la fuente de financiamiento declarada en la publicación.