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Effects of Sewage Discharge on Polychaete Communities in East African Peri-urban Equatorial and Subtropical Mangroves

AutorPenha-Lopes, Gil; Fidalgo e Costa, Pedro; Gil, João ; Costa Leal, Miguel; Cannicci, Stefano; Macia, Adriano; Mwangi, Stephen; Paula, José
Palabras claveMangroves
East Africa
Fecha de publicación2014
EditorWestern Indian Ocean Marine Science Association
CitaciónWestern Indian Ocean J. Mar. Sci. 12 (1) : 1-14 (2013)
ResumenMangrove ecosystems are of great socioeconomic and ecological importance but are adversely affected by anthropogenic activities. Benthic infaunal community studies, particularly of polychaetes, are useful indicators of the health of an ecosystem. An unbalanced After Control/Impact (ACI) design was used to compare the polychaete infaunal community in polluted peri-urban mangrove swamps with nearby mangroves unaffected by sewage in Kenya and Mozambique. Differences were detected in the polychaete community between the peri-urban and un-impacted mangroves in both countries. In Kenya, the results showed that peri-urban mangroves are subjected to more severe human impact, leading to a decrease in polychaete diversity and a shift to more opportunistic species. In contrast, in Mozambique, the polluted peri-urban system had higher polychaete diversity when compared with the control sites. This was probably due to domestic sewage making more organic matter available in the foodweb. Among the polychaete families found in this study, the most tolerant to sewage were the Nereididae and Capitellidae, with Dendronereides zululandica, Perinereis vancaurica and a Mediomastus sp. the main representatives.
Descripción14 páginas, 2 tablas , 5 figuras
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