Lilik Budi Prasetyo Department of Forest Resources Conservation & Ecotourism Forestry Faculty
Presented in Viikki Tropical Fores Research Center-Helsinki University 18 April 2008
Center for Environmental Research Bogor Agricultural University lbpras@indo.net.id
ROLE OF REMNANT FOREST AS HABITAT AND
SOURCE OF BIODIVERSITY
Source : Prasetyo, Hirata, Saito
Forest fire 1998
Total affected area : 3.4 million Ha
MONTHLY FIRE OCCURRENCE IN 1998
Source : Prasetyo, Hirata, Saito
-0.2
Burned vegetation Healthy vegetation
DYNAMIC CHANGES OF MONTHLY NDSWIR DURING 1998 - 2000
(NIR –SWIR)/(NIR + SWIR) (4–3/(4 + 3)
11 Feb 1992 11 Feb1998 26 Jan1998 11 Feb1998 2003
CASE 1 :
BUKIT BANGKIRAI, EAST KALIMANTAN
MULTI DISCIPLINARY TEAM
STUDY SITE
Bukit Bangkirai, East Borneo
Design Observation Plot
Three type of plots
a. Remnant/Undisturbed Forest (100 x 100 m) b. Light Damage Forest (Low Disturbance) (60 x 60 m) c. Heavy Damage Forest (Heavy Disturbance) (100 x 100 m)
- Divided into 10 x 10 m, sub plot - Vertical profile
- Hemiview photo
- Inventory : trees, sapling, Shrubs/herbs, small mammals
10 m 5 m
1 m
Tree census > 5 cm DBH
Sapling census > 1 cm DBH
Understory vegetation survey quadrate VEGETATION SURVEY
Hemispherical View
Leaf Area Index
PLOT LIGHT DAMAGE
PLOT SEVERE DAMAGE
Forest Vertical Profile
Control Plot
Light damage Plot
Heavy damage Plot
Source : Simbolon
7 years after fire : comparison
Subject
Plot Type
Remnant
Number of life trees per ha 1391 1000 488
BA of life trees per ha (m2) 29.86 20.87 5.92 Number of standing dead trees per ha 190 500 583
BA of standing dead trees per ha (m2) 8.26 8.81 17.47
Crown cover DBH >10cm (m2/sub plot)
108.16 82.63 23.17
Number of species 280 128 94
Number of genus 116 76 60
Number of family 43 35 34
Shannon’s Diversity Index 2.0706 1.8634 1.3312
Tre e s
es
NaturalPost fire
A mangium
Tree Species Number 7 years after Fire
Saplings
es
NaturalHe rbs & Se e dlings
No. of s ub-plots
N
o.
o
f s
p
NaturalPost fire A mangium
Source : Simbolon
SPECIES NUMBER
Conclusion : Restoration is just started
LAI (LEAF AREA INDEX)
REMNANT FOREST AS RESOUCE SPECIES
(2008)
FIRE BREAK (IT WAS ROAD)
BURNED AREA UNBURNED
AREA
0 m 20 m 40 m 60 m
20 m 40 m
60 m
GRADIENT OF LAI
0.0
REMNANT FOREST DISTURBED FOREST
0
Jumlah individu
GRADIENT OF INDIVIDU NUMBER
Individu number
Gradient of No. Species
SPECIES COMPARISON
DISTURBED
• 35 species
• 20 species absent in
Undisturbed
Macaranga hypoleuca, M personii, Alstonia, Dipterocarpus confertus etc
• Common species:
Macaranga gigantea, Meliocope glabra
UNDISTURBED
• 73 species
• 58 species absent in disturbed forest
Aglaia, Canarium, Shorea, Dacryodes crostata, Dysoxylum, Ochanostachys sp
. Common species: Shorea leprosula, S ovalis, S johorensis, parvifolia
Small Mammal Distribution
LAI (LEAF AREA INDEX)
SMALL MAMMAL TRAP
PRELIMINARY RESULT
5
0,813 1,139 1,465 1,791 2,117
LAI
Most Species captured in the area is not interior forest species specialist, but edge species
LANDSCAPE IN 1985
LANDSCAPE IN 1989
Exogenous disturbance
LANDSCAPE IN 1992
LANDSCAPE IN 2000
LANDSCAPE IN 2004
CASE 2 : BALAIRAJA NATURE RESERVE, RIAU
SMALL MAMMAL DISTRIBUTION IN REMNANT FOREST : RIAU
Identified species :
No Spc name
Line transect
∑
Maxomys surifer
Sundamys muelleri
INTERIOR SPECIES
INTERIOR SPECIES : SEED DISPERSAL
distance from edge (m) distance from edge (m)
In
Rattus tiomanicus
Callosciurus notatus
Tupaia glis
EDGE SPECIES
EDGE SPECIES : SEED DISPERSAL
distance from edge (m)
In
d
iv
id
u
distance from edge (m)
In
•
Remnant forest have important role as habitat
•
Remnant forest as species source
–Enhance restoration (seed source)
•
Research Question ?
–How long they can survive ? •How long isolation effect take place ? –How do we manage the remnant ?
• How large to ensure species ?
• What species should be pay more attention ?
Professor Ilkka Hanski
impact of habitat fragmentation on the ecology, genetics and evolution of species.
From landscapes to molecules,
