Mangroves are critically threatened by human activities, despite the important ecosystem functions and services they provide. Mangroves in Cameroon represent no exception to the worldwide trend of mangrove destruction, especially around Douala, on the Wouri river estuary. In two sites around Douala, we assessed the presence of sterols, PAHs, PCBs, DEHP, DDT and its metabolite p,p'-DDE and potentially toxic metals in sediment samples. As a proxy of ecological quality, we measured the diversity and abundance of macrobenthos assemblages. We detected p,p'-DDE contamination, with concentrations higher than 3 μg kg− 1 in 16 out of 26 samples which were attributed to recent widespread use of DDT. The detection of sterols revealed faecal contamination. Significant sensitivity of the macrobenthos to contaminants was revealed, with possible implications on the overall mangrove vulnerability to climate change and on the provision of ecosystem services to local populations.

Fusi, M., Beone, G. M., Suciu, N., Sacchi, A., Trevisan, M., Capri, E., Daffonchio, D., Din, N., Dahdouh Guebas, F., Cannicci, S., Ecological status and sources of anthropogenic contaminants in mangroves of the Wouri River Estuary (Cameroon), <<MARINE POLLUTION BULLETIN>>, 2016; 109 (2): 723-733. [doi:10.1016/j.marpolbul.2016.06.104] [http://hdl.handle.net/10807/95791]

Ecological status and sources of anthropogenic contaminants in mangroves of the Wouri River Estuary (Cameroon)

Fusi
;
Marco; Beone
Secondo
;
Gian Maria; Suciu;Nicoleta; Sacchi;Angela; Trevisan;Marco; Capri;
2016

Abstract

Mangroves are critically threatened by human activities, despite the important ecosystem functions and services they provide. Mangroves in Cameroon represent no exception to the worldwide trend of mangrove destruction, especially around Douala, on the Wouri river estuary. In two sites around Douala, we assessed the presence of sterols, PAHs, PCBs, DEHP, DDT and its metabolite p,p'-DDE and potentially toxic metals in sediment samples. As a proxy of ecological quality, we measured the diversity and abundance of macrobenthos assemblages. We detected p,p'-DDE contamination, with concentrations higher than 3 μg kg− 1 in 16 out of 26 samples which were attributed to recent widespread use of DDT. The detection of sterols revealed faecal contamination. Significant sensitivity of the macrobenthos to contaminants was revealed, with possible implications on the overall mangrove vulnerability to climate change and on the provision of ecosystem services to local populations.
Inglese
Fusi, M., Beone, G. M., Suciu, N., Sacchi, A., Trevisan, M., Capri, E., Daffonchio, D., Din, N., Dahdouh Guebas, F., Cannicci, S., Ecological status and sources of anthropogenic contaminants in mangroves of the Wouri River Estuary (Cameroon), <<MARINE POLLUTION BULLETIN>>, 2016; 109 (2): 723-733. [doi:10.1016/j.marpolbul.2016.06.104] [http://hdl.handle.net/10807/95791]
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