Vulnérabilité des paysages forestiers dans le parc de Ranomafana (Madagascar) : dynamiques environnementales et trajectoires agroforestières

Abstract : In the context of currents environmental changes, and deal with anthropogenic pressures, the preservation of tropical forest has become a major issue. In this context, Madagascar island has implemented a new forest policy since 1990, having garnered the creation of protected areas. Ranomafana National Park has been created in 1991 and classify as World heritage in 2007. The establishment of a landscape dynamics monitoring at the local level, using remote sensing, allow analysis of forest changes faces anthropogenic pressures, taking into account the specificities of the study area. This monitoring allows to observe past and crurrent pressures on forest and point landscape trajectories. In addition, the forest bioclimatic activity monitoring examines the impact of climatic conditions and land use change on vegetation dynamics. The trend is the global reduction of forest cover mainly of lowland forest. Forest degradation rate during these past 25 years is estimated at 0,62%/year. These variations are different depending on the distance to the Park. Furthermore, analysis of photosynthetic activity reveals a general decline in values over the study period, regardless of the plant community type studied.Keys-words : Madagascar, remote sensing, tropical forests, Land-use change
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-01529847
Contributor : Abes Star <>
Submitted on : Wednesday, May 31, 2017 - 2:32:11 PM
Last modification on : Monday, September 2, 2019 - 2:46:08 PM
Long-term archiving on : Wednesday, September 6, 2017 - 4:40:18 PM

File

BOULOGNE_2016_archivage.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01529847, version 1

Collections

Citation

Marine Boulogne. Vulnérabilité des paysages forestiers dans le parc de Ranomafana (Madagascar) : dynamiques environnementales et trajectoires agroforestières. Environnement et Société. Université Grenoble Alpes, 2016. Français. ⟨NNT : 2016GREAU018⟩. ⟨tel-01529847⟩

Share

Metrics

Record views

369

Files downloads

2657