Widespread sewage pollution of the Indian River Lagoon system, Florida (USA) resolved by spatial analyses of macroalgal biogeochemistry.
Mar Pollut Bull
; 128: 557-574, 2018 Mar.
Article
en En
| MEDLINE
| ID: mdl-29571408
The Indian River Lagoon (IRL) system, a poorly flushed 240â¯km long estuary in east-central Florida (USA), previously received 200 MLD of point source municipal wastewater that was largely mitigated by the mid-1990's. Since then, non-point source loads, including septic tank effluent, have become more important. Seventy sites were sampled for bloom-forming macroalgae and analyzed for δ15N, % nitrogen, % phosphorus, carbon:nitrogen, carbon:phosphorus, and nitrogen:phosphorus ratios. Data were fitted to geospatial models showing elevated δ15N values (>+5), matching human wastewater in most of the IRL system, with elevated enrichment (δ15Nâ¯≥â¯+7 to +10) in urbanized portions of the central IRL and Banana River Lagoon. Results suggest increased mobilization of OSDS NH4+ during the wetter 2014 season. Resource managers must improve municipal wastewater treatment infrastructure and commence significant septic-to-sewer conversion to mitigate nitrogen over-enrichment, water quality decline and habitat loss as mandated in the Tampa and Sarasota Bays and the Florida Keys.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Algas Marinas
/
Aguas del Alcantarillado
/
Contaminantes Químicos del Agua
/
Monitoreo del Ambiente
/
Purificación del Agua
/
Ríos
Tipo de estudio:
Prognostic_studies
Límite:
Humans
País/Región como asunto:
America do norte
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2018
Tipo del documento:
Article
Pais de publicación:
Reino Unido