ZIGUINCHOR Tuesday, October 14, 2008 (IRIN) - Mangroves, one of the world’s richest ecosystems, are declining in Casamance, southern Senegal, and thinning forests spurred the Senegal-based non-profit Oceanium to plant six million mangrove trees in a bid to reverse deforestation, thereby boosting fish stocks and reviving livelihoods. Up to 15,000 youths from 130 villages helped with the two-month replanting effort, just completed, which was the first of its kind in Africa, according to Binetou...