Journal article
Shrimp farming influence on carbon and nutrient accumulation within Peruvian mangroves sediments
Estuarine, Coastal and Shelf Science, Vol.243, p.106879
30/09/2020
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Abstract
In order to investigate the influence of shrimp farming activities on carbon and nutrient accumulation, sediment cores were collected from two areas at different distances from shrimp farms within a Peruvian mangrove ecosystem. In both areas two sediment cores were collected in a transect, one from a mangrove-covered site and one from a mudflat site. At both study sites, the isotopic values of carbon and nitrogen as well as the C:N molar ratios suggest that the highest carbon accumulation rates were linked to terrestrial-derived organic matter, with higher carbon stocks and fluxes within mangrove-covered zones. The historical records indicate that since the mid-1970′s, the areas nearest to the shrimp farming activity have been accumulating higher proportions of algal derived organic matter, which were likely triggered by the high nutrient influx derived from shrimp farming effluents. The carbon and nutrient fluxes were up to threefold higher within the area nearest to the shrimp farms, whereas the geochronologies showed that the carbon and nutrient stocks in this area increased by up to twofold. The results showed that mangrove-covered zones are more capable to keep pace with sea level rise (SLR) as compared to the mudflat zones, indicating the importance of mangrove vegetation in terms of the vulnerability of this region to SLR and an ongoing capacity to continue accumulating sediments. This study highlights the role that mangrove vegetation plays in mitigating the impact of shrimp farming activities, accumulating carbon and nutrients in pace with SLR.
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•C, N and P accumulation in mangroves increased due to nearby shrimp farming.•Carbon accumulation increased up to twofold since the shrimp farming establishment.•Nutrient accumulation was higher in the area near to the shrimp farms.•The role of mangrove in mitigating shrimp farming nutrient runoff was evidenced.
Details
- Title
- Shrimp farming influence on carbon and nutrient accumulation within Peruvian mangroves sediments
- Creators
- Alexander Pérez (Author) - Universidad Peruana Cayetano Heredia, Centro de investigación para el desarrollo integral y sostenible (CIDIS), Facultad de Ciencias y Filosofía, Laboratorios de investigación y desarrollo (LID), Laboratorio de Biogeociencias, Av. Honorio Delgado 430, Urb Ingeniería, Lima, PeruWilson Machado (Author) - Universidade Federal Fluminense, Departamento de Geoquímica, Rua Outeiro São João Baptista s/n, Niteroi, RJ, BrazilDimitri Gutiérrez (Author) - Instituto del Mar del Perú, Dirección General de Investigaciones en Oceanografía y Cambio Climático, Av. Gamarra y General Valle, s/n, Chucuito, Callao, PeruMaritza S Saldarriaga (Author) - Universidad Peruana Cayetano Heredia, Facultad de Ciencias y Filosofía, Programa Maestría en Ciencias del Mar, Av. Honorio Delgado 430, Lima, PeruChristian J Sanders (Author) - National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, Coffs Harbour, NSW, 2450, Australia
- Publication Details
- Estuarine, Coastal and Shelf Science, Vol.243, p.106879
- Publisher
- Elsevier Ltd
- Identifiers
- 991012926961302368
- Academic Unit
- National Marine Science Centre; National Centre for Flood Research
- Language
- English
- Resource Type
- Journal article