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SAM (Provision services from mangrove): multi-disciplinary evaluation of the effects of reforestation policies on biodiversity
  • Name of project:SAM (Provision services from mangrove): multi-disciplinary evaluation of the effects of reforestation policies on biodiversity
  • Project code:SED001
  • Place :Can Gio Reserve
Project Description

The SAM project (Provision services from mangrove: multi-disciplinary evaluation of the effects of reforestation policies on biodiversity) was funded in 2015 by the CNRS (PEPS project - INEE). The data and results are still on the way.

The main objective of the SAM project was to understand how, in a context of combined external pressures and different management policies, some key services provided by mangroves may be modified or restored by reforestation. SAM focused its activities on the Can Gio Reserve (Vietnam), where the mangrove was heavily impacted by human activities and climatic events, but has benefited from extensive reforestation campaigns for over 30 years.

A multidisciplinary methodology has been engaged for assessing the use of the mangrove conservation and sustainable sharing of resources through the analysis of the beneficiaries. A field sampling survey along 3 main areas of the Can Gio Biosphere Reserve in Vietnam has been conducted in 2015: in the core area, strictly protected ecosystem with restricted human activity, in a buffer zone nearby the core area, and used for activities compatible with sound ecological practices, and in a buffer/transition area with resource management practices promoted and developed such as aquaculture of shellfishes. The valuation of the biodiversity and its changes in the different areas was carried out using a multi-indicator approach sampling two major compartments of the ecosystem impacting the society: microorganisms (viruses, bacteria and pathogens) and macro-organisms (bivalves and crustaceans). This approach was coupled with functional analysis and molecular taxonomy, and linked to ethnology-malacology investigations. One species of crab important for the exploitation and consumption was sampled, the mud crab (Scylla serrata), which has the highest commercial value. Methodologies to characterize the biological traits of this species were developed. The rights of access and use of this biodiversity by local communities was explored to better understand the system of values and socio-cultural services in this area.

SAM-2015-PANFILI-1_1

The PEPS SAM allowed to undertake and succeed in a multidisciplinary survey and sampling in the Can Gio Reserve in Vietnam. Many results were obtained among the different fields of research, and some results are still to be expected. There is still a need for more time to put together the results issued from the social science survey and the biological sampling. The aim is still to assess a framework for a methodology for a multidisciplinary approach on research on mangrove.

Among the main results, local people seem to have good knowledge of the conservation status of the different zones within the Can Gio biosphere reserve. The core and the buffer areas seemed to present the same status in term of virus, micro- and macro-organism biodiversity, even if the buffer zone with more intense aquaculture presented slight differences. Interpretations should however remain careful, as environmental differences could also induce biodiversity differences. The most amazing result is the low level of crab biodiversity, as revealed by molecular analysis, even if there are strong differences in morphotypes and sizes. One of the perspectives will consist on interviewing the local people in order to know if they give different names for crabs of the same species presenting different morphologies. This aspect will be included in the general perception of the biodiversity by stakeholders.

SAM-2015-PANFILI-3

Name

Occupation

% time 2015

Team

Bettarel Yvan

CR IRD         

10

MARBEC – Thème 4

Bouvier Corinne

AI CNRS

10

MARBEC – Thème 4

Bouvier Thierry

DR CNRS        

5

MARBEC – Thème 4

Burgos Ariadna

CR associée

20

Eco-anthropologie

Cormier-Salem Marie-Christine

DR IRD

20

UMR PALOC

Durand Jean-Dominique

CR IRD          

15

MARBEC – Thème 1

Ferraton Franck

AI IRD 

10

MARBEC – Thème 1

Hoang Duc Huy

PR VNU

5

DEEB – US-VNUHCM

Klein Judith

CR IRD        

10

MARBEC – Thème 4

Nguyen Van Trai

PR NLU

10

Fac. Fisheries

Panfili Jacques

DR IRD          

25

MARBEC – Thème 1

Tran Ngoc Diem My

PR VNU

10

DEEB – US-VNUHCM

Tran Trong Ngan

Master US

5

DEEB – US-VNUHCM

Villéger Sébastien

CR CNRS        

5

MARBEC – Thème 4

 
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