MOUSSOUNI GISS SENEGAL .pdf



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‫الجمهورية الجزائرية الديمقراطية الشعبية‬
REPUBLIQUE ALGERIENNE DEMOCRATIQUE ET POPULAIRE

Project "Conservation of biodiversity of world interest and sustainable use of ecosystem
services in cultural parks in Algeria"

A diachronic study on the evolution of the main ecosystems
Tassili / Ahaggar cultural parks,

17ème Conférence GISS- 4-6 Mai-Saint Louis, Sénégal.

Présenté par Mr Abdenour MOUSSOUNI, chargé de la planification (UCG).

Aim of the project: Ensure the
conservation of biodiversity and
sustainable exploitation of the different
ecosystems services in cultural parks.

Background and objective
Tassili n’Ajjer/ Ahaggar
cultural parks

Large area
Territoire
immense
Tassili Cultural Park
: 138.000
km²
Ahaggar Cultural Park : 633.887km²

Important climatic
variation in time and space

Saharan climatic conditions would exclude all life if they are
homogeneous over the entire surface of the desert. The presence of
many microclimates is the key of its rich biodiversity. These
microclimates offer a favorable and unique habitat for organisms,
animals and plants.

Dry environment
The Sahara receives an extremely
low amount of rain

Fragile ecosystems

Low population density

Rich living Algerian
cultural heritage

The cultural heritage in the Algerian Sahara may be viewed as one of the ultimate human
adaptation to global warming.

Rich Biodiversity

Habitat for world
importance species

Important area for bird’s
conservation

The rich biodiversity of the Tassili and Ahaggar cultural parks with their diverse ecosystems services are
facing multiple pressures.

Contraints

Solutions

Results

Habitat regression
Decrease of
vegetation cover

Forcing of dray
climate and pasture

Overexploitation of
plants

Poaching

1
Building
a
biodiversity
monitoring
system
based on network of
mobile
units
for
management
and
supervision.

The
project
has
contributed to the
preservation of the
prioritized areas.

Observation

Solution

Monitoring large area is
complex

2

Incomplete ecosystems
inventories

Incomplete data analysis

Reduced
efficiency
for
planning, decision-making.

Use of satellite remote
sensing
data
to
understand the evolution
of
the
different
ecosystems in the Tassili
Ahaggar cultural parks.

Use change detection
technique based on
remote sensing satellite
images to map the
evolution
of
main
ecosystems and identify
the most important
pressure on productive
ecosystem services. The
ongoing study uses 1984
and 2016 as reference
years.

Methodology

USGS Landsat database

Bibliography

Image selection

Preprocessing
Test and evaluation of different
mapping change detection
techniques

Field work

Maps verification

Evaluation

Yes
Maps production

No

Preliminary results
Step 1: preprocessing

Spectral enhancement of vegetation

Example showing the performance of the applied approach in the case of a narrow vegetation
located in a canyon.

Step 2: land cover classes delimitation

Determine the different classes of land use

Example of a steppe ecosystem in near the city of Djanet (Tassili park)
• The method of thematic classes’ identification is based
segmentation/classification approach.

• The process is able to delineate the steppe ecosystem accurately.

on

an

hybrid

Analysis of preliminary
maps
Evolution of vegetation between 1986 and 2016
Case of the Abalessa region

Evolution of vegetation between 1986 and 2016
Case of the town of Tamanrasset

Evolution of vegetation between 1986 and 2016
Case of the region of Idelès

1986

2016

Evolution of vegetation between 1986 and 2016
Case of the region of Idelès

1986

2016

The green color shows vegetation growth between 1986 and 2016

Conclusion
The preliminary results show that there was an increase of the vegetation between
1986 and 2016.
There is a limited impact of the use of productive ecosystem services due to the
large area of the two parks.

The habitats of the great fauna seem well preserved,

This is also due to the good practice and the know-how of the Algerian population
living in the these areas.

Further research need to be under taken to explore the link between these results
with global warming.

Results of this study

Bibliographic data

Results of anthropological
investigations

Base for the identification
of sites for the installation
of camera traps (50) for
cheetah monitoring.



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