buh wung gaston - esri€¦ · data analysis and presentation . satellite image processing...
TRANSCRIPT
Buh Wung Gaston
GIS and Remote Sensing Laboratory, Limbe Botanic Garden,
P.O Box 437 Limbe, Cameroon Email: [email protected] or [email protected],
Website: www.mcbcclimbe.org
Mangroves are mainly
present along the coast
of Cameroon
Interpret and digitize mangrove zones from; satellite
images,
Delineate different mangrove species,
Locate settlements and other land uses within and
around the mangrove zones
Propose management plan
Unsustainable exploitation of mangrove
species
Extreme depletion and almost complete
disappearance in some areas
Increasing human populations
Decreasing quantities while increasing
demands
Projected Population in Millions of inhabitants, compared. Source: Cameroon country case studies on climate change impacts and adaptation assessments’ (1998)
y = 0.1041x - 206.81
R² = 0.9939
-2
0
2
4
6
8
10
12
14
16
1950 2000 2050 2100 2150
Po
pula
tion-M
illion
Year
Population
Linear (Population)
Projected fuel wood needs in stock for the
coastal zone of Cameroon. Source: Cameroon country case studies on climate change impacts and
adaptation assessments’ (1998)
y = 186.98x - 372634
R² = 0.9696
-5000
0
5000
10000
15000
20000
25000
1950 2000 2050 2100 2150
Qu
anti
ty o
f m
angro
ves
Year
Coast
Linear (Coast)
Sites selection and stakeholders
identification
Field data collection
Data analysis and presentation
Satellite Image processing
Delineation of mangroves zones and
mangrove species from Satellite images
Questionnaires establishment
3 Major classes of mangroves species
were classified; (Rhizophora,Avicennia,
Nipa)
Classified under three levels - low,
medium and high-dense mangroves.
An in-depth analysis culminated in
thirteen classes based on the dominance
of different species in different areas.
LEVEL I: High-Dense
LEVEL 2: Medium-High-Dense
LEVEL 3: low-Sparse
LEVEL I: High-Dense Mangroves
LEVEL I: High-Dense Mangroves
R1, RN1, A1, AR1 and ARN1 where:
R1= Rhizophora species with little exploitation and a predominance strata of up to 50 to 80%
RN1= A high composite cluster with more than 80% dominance by Rhizophora and Nipa
A1= Original high and dense Avicennia species at ocean limits and estuaries with a dominance of more than 80%. Sporadic presence of Rhizophora species
AR1= Composite high and dense clusters with more than 80% dominance by Rhizophora and Avicennia
ARN1= Composite high and dense clusters with more than 80% dominance of Avicennia, Rhizophora and Nipa
LEVEL 2: Medium High-Dense
LEVEL 2: Medium High-Dense R2, A2, AR2, ARN2, ARNX2, where: R2= Rhizophora species with Anthropic Degradation; low
height with open spacing of small clusters or isolated stands of more or less dead or declining Rhizophora with less than 15 to 60% coverage
A2= Low and open Avicennia Species; generally reduced with anthropic degradation and a dominance of 20 to 80%
AR2 = Composite heterogeneous formation of medium height which is closed but at times open with a dominance of up to 50 to 80% Avicennia and Rhizophora
ARN2 = Composite heterogeneous formation of medium height which is closed but at times open with a dominance of up to 50 to 80% Avicennia, Rhizophora and Nipa
ARNX2 = Composite heterogeneous formation of medium height which is closed but at times open with a dominance of up to 50 to 80% Avicennia, Rhizophora, Nipa and many other species of hard land.
LEVEL 3: low-Sparse
Mangrove zone along the Cameroon coastal Belt
Figure3: Tiko-Douala-Mouanko-Manoka (Zone Two)
Figure 4: Bakassi - Ndian – Rio del Rey – Njangassa (Zone One)
Photo 1: Stumps of Felled Mangroves Visible At Low Water Tide
Antelopes Caught By Poachers in the Bakassi Mangroves zone
Environmental education should be carried
out
Giant mangrove nurseries should be
established in the degraded mangrove areas
Mangrove species restoration as an approach
to conservation should be implemented
Participatory management planning should be
instituted