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Severe impacts of brown tides caused by Sargassum spp. on near-shore Caribbean seagrass communities

Van Tussenbroek, Brigitta I | Hernández Arana, Héctor Abuid [autor/a] | Rodríguez Martínez, Rosa E [autor/a] | Espinoza Ávalos, Julio, 1952-2018 [autor/a] | Canizales Flores, Hazel M [autor/a] | González Godoy, Carlos E [autor/a] | Barba Santos, M. Guadalupe [autor/a] | Vega Zepeda, Alejandro [autor/a] | Collado Vides, Ligia [autor/a].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Proliferación de algas | Sargassum fluitans | Sargassum natans | Mortalidad coralino | Pastos marinos | Cambio climáticoTema(s) en inglés: Algal blooms | Sargassum fluitans | Sargassum natans | Coral mortality | Seagrasses | Climatic changesDescriptor(es) geográficos: Mirador Nizuc (Quintana Roo, México) | Puerto Morelos, Benito Juárez (Quintana Roo, México) | Xahuachol, Othón P. Blanco (Quintana Roo, México) | Xcalak, Othón P. Blanco (Quintana Roo, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Marine Pollution Bulletin. volumen 122, número 1-2 (September 2017), páginas 272-281. --ISSN: 0025-326XNúmero de sistema: 58385Resumen:
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From mid-2014 until the end of 2015, the Mexican Caribbean coast experienced a massive in fl ux of drifting Sargassum spp. that accumulated on the shores, resulting in build-up of decaying beach-cast material and near-shore murky brown waters (Sargassum-brown-tides, Sbt). The effects of Sbt on four near-shore waters included reduction in light, oxygen (hypoxia or anoxia) and pH. The monthly influx of nitrogen, and phosphorus by drifting Sargassum spp. was estimated at 6150 and 61 kg km−¹ respectively, resulting in eutrophication. Near-shore seagrass meadows dominated by Thalassia testudinum were replaced by a community dominated by calcareous rhizophytic algae and drifting algae and/or epiphytes, resulting in 61.6-99.5% loss of below-ground biomass. Near-shore corals suffered total or partial mortality. Recovery of affected seagrass meadows may take years or even decades, or changes could be permanent if massive influxes of Sargassum spp. recur.

Recurso en línea: http://www.sciencedirect.com/science/article/pii/S0025326X17305374?via%3Dihub
Lista(s) en las que aparece este ítem: Ganadería, agroforestería, silvopastoril y cambio climático
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Disponible para usuarios de ECOSUR con su clave de acceso

From mid-2014 until the end of 2015, the Mexican Caribbean coast experienced a massive in fl ux of drifting Sargassum spp. that accumulated on the shores, resulting in build-up of decaying beach-cast material and near-shore murky brown waters (Sargassum-brown-tides, Sbt). The effects of Sbt on four near-shore waters included reduction in light, oxygen (hypoxia or anoxia) and pH. The monthly influx of nitrogen, and phosphorus by drifting Sargassum spp. was estimated at 6150 and 61 kg km−¹ respectively, resulting in eutrophication. Near-shore seagrass meadows dominated by Thalassia testudinum were replaced by a community dominated by calcareous rhizophytic algae and drifting algae and/or epiphytes, resulting in 61.6-99.5% loss of below-ground biomass. Near-shore corals suffered total or partial mortality. Recovery of affected seagrass meadows may take years or even decades, or changes could be permanent if massive influxes of Sargassum spp. recur. spa

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