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Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
Published on: October 29, 2016
Anthropogenic and environmental influences on nutrient accumulation in mangrove sediments
Alexander Pérez1, Wilson Machado2, Christian J Sanders3
1Universidad 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, Peru.
None:
Here we provide a global review on nutrient accumulation rates in mangroves which were derived from sixty-nine dated sediment cores, addressing environmental and anthropogenic influences. Conserved mangroves presented nitrogen and phosphorous accumulation rates near to 5.8 ± 2.1 and 0.8 ± 0.5 g m-2 yr-1, respectively. These values were significantly lower than those observed for mangroves impacted by coastal eutrophication, which were found to bury 21.5 ± 8.6 and 17.9 ± 2.4 g m-2 yr-1, of nitrogen and phosphorous respectively. Moreover, higher nutrient accumulation rates were found in mixed mangroves as compared to monospecific forests, and higher values were noted within vegetated areas as compared to mudflats. For South America and Asia, mangroves impacted by anthropogenic activities may result in up to seventeen-fold higher nitrogen and phosphorous accumulation rates in comparison with values under conserved conditions. For Oceania, these differences may be up to fivefold higher in impacted as compared to the conserved ecosystems in this region.
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