MANTADIA- ZAHAMENA

Deforestation across elevationBetween 1974 and 1994: around 90% of forest <800 m are lostBetween 1990-2000:

0-800 m – 17.8% of the remaining forest are lost800-1200 m – 5%1200-1600 m - <1% Forest logging

Few direct impact of forest extraction on biodiversity Major impacts in the short and medium termOpen up deforestation by local peopleRapid expansion of invasive plant species impeding regeneration of high economic valued species

CONTEXT OF ZAHAMENA-MANTADIA

Corridor area: 540,000 ha

No. Population: ~800,000

Population density:

46 inhabitants/ km2

Mining: small illegal mining activities and 4 companiesHunting: very few data, but in reserves Indri and Varecia populations are abundant compared to other sites

CONTEXT ANALYSIS IN ZAHAMENA-MANTADIA

Durban Vision implementation- Conservation Sites

Design the logical framework to understand links between socio-economic factors and deforestation: issue, factors, changes, data requirement.

Collection and compilation of existing biological and socio-economic data with partners

Identification of gaps of information: RAP

Gap analysis, spatial analysis, participatory appraisal

Combine biological, geographic and economic data layers

Assess the landscape scenarios with associated biodiversity and economic values

CONTEXT ANALYSIS PRODUCTS

Priority zones for conservation are identified, with management rules and options for each zone to achieve conservation goals

Deforestation trends are projected in the future

Opportunity costs and benefits of conservation alternatives are assessed

Landscape scenarios with associated biodiversity and economic values are evaluated

KEY QUESTIONS

Where should the core conservation zone be? => value of biodiversity and ecological services

Where the deforestation rate is the highest in Zahamena-Mantadia ? => vulnerable sites

What and where do ecological function benefits come from, and who received them? => cost-benefit analysis

What management scenarios and rules do we need in order to conserve biodiversity of the highest value across the corridor? => biological and economic criteria

Land use and forest cover

Roads

Protected areas

MCE Analysis

Population density DEM

Vulnerable sites

DATA LAYERSWatersheds

Mining Core Conservation sites

Business-As-Usual : Cellular Automata

Algorithm projects forest cover in 30

years

MCE: Integrate and correlate

socioeconomic variables affecting

deforestation and agricultural activities

Economic analysis of hydrological

benefits of watersheds

Cost-benefit analysis of forest

management transfer to communities

Evaluation of economic impacts from

community-based ecotourism

Development of sustainable and cost-

effective management scenarios

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600 650 700

750800

850900

950

Amparafaravola

Ambatondrazaka

Moramanga

Brickaville

Vavatenina

RanomafanaBeforona

Amboasary-Gara

Ambodimanga

Ambatomainty

Sahaviavy-FitoDidy

ManakambahinyAtsinanana

$ Chef-Lieu-commune# Chef-Lieu-Fivondronana

Route nationale

Délimitation corridor Zahamena - Mantadia

No DataTrès fort risque de dégradationFort risque de dégradationMoyen risque de dégradationFaible risque de dégradationTrès faible risque de dégradationDégradation de sol négligeable

Typologie des risques de dégradation des sols

0 25 50 Km

DATA CONSOLIDATION

HURDLES AND AH-HAS

Difficulties: – Lack of data at communal and village level to refine

planning process: need for RAP and RACE – Tamarin modeling needs to be adapted to the

current Site de Conservation establishment process – Mechanism for transferring conservation benefits to

downstream populations should be designed and implemented

Innovative and helpful analysis: – Analysis of risks of erosion – Contribution to the refining of preliminary forest

zoning maps

ENGAGEMENT of STAKEHOLDERS

Regional Development Committees Authorities at provincial,

regional and local level Environment, Water and

Forest departments Local NGOs Private sectors

Local Communities and village Associations

Information- concertation

Communal Planning

Regional Planning

Decision-makingChefs de Region

Platform of coordinationCorridor Management Consolidation

USAID Alliance