Abstract
This article demonstrates the urban anthropogenic threats and their impacts on Sainte Marie (Eastern Madagascar) mangrove ecosystem. In addition to conducting interview with 158 residents, floristic inventories were carried out in order to compare the mangrove structure between a control site and another one that was impacted by Belle Vue dyke (south of the District downtown) rehabilitation. From 2003 to 2014, the island of Sainte Marie lost 0.47% per year of its mangrove area. 87% of the harvested resources from this ecosystem are fish products and are related to human nutrition. The mangrove is used as a dumping ground for liquid and solid waste in the lots of Saint Joseph and La Pointe. Defecation in the open air is topical under the island’s mangrove forest. A very weak resilience of the mangrove impacted by the rehabilitation of Belle Vue dyke was noted. Indeed, regenerations of Bruguiera gymnorrhiza and Ceriops tagal have struggled to rebuild. The total height and diameter of impacted trees decreased by 37.2% and 44.3%, respectively. The development of an updated urban master plan, including mangroves in the related zoning process is an imperative measurement for the conservation and/or valuation of existing lots.
Highlights
Jul. 25, 2018 coast of Madagascar and 0.6% of the entire territory of Sainte Marie island, the mangrove of the latter is in fourth position in terms of area, after the Irodo, Ambodivahibe and Rigny complex, which includes 90% of mangroves in eastern
Growing in a warm and humid (3369 mm of annual rain) tropical climate where there is no dry season (Rasoamanarivo, 2017), its mangrove is confronted with a dynamics of urban planning where the stakes of urbanization on the sites with
More than a dozen natural resources are taken from mangrove lots in Sainte
Summary
Except the few works carried out by Rakotomavo & Rasoamanarivo, 2018; Cétamada, 2014; Andriantsoa, 2017, the island’s mangrove lots were little studied. This ecosystem of eastern Madagascar holds an important place (Andrianoelisoa, 2017) and a multitude of issues, both ecologically and socio-economically and territorial planning (Rakotomavo, 2018). Located in the Indian Ocean, the Malagasy island of Sainte Marie is a tourist town of 27,200 inhabitants and dense of 100 inhabitants km−2 (Rasoamanarivo, 2017). In addition to the demographic dynamics characterized by the coming and going of resident and non-resident populations including tourists, traders and other local and foreign investors, the rehabilitation of
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
