A presentation by Dr. Gede S.

1. 5/27/2010
NEMATODE DIVERSITY IN A RANGE Background
OF LAND USE TYPES IN JAMBI SITE Nematodes mediate some soil processes and
INDONESIA contribute to soil quality and soil health.
Nematodes can be sensitive to changes in soil
g
environment, including LU conversion.
I Gede Swibawa, TN Aeny, I Mashyuda, DD Aryadi
Universitas Lampung
INDONESIA
In recent decades, large areas of forest in The question :
Jambi, Sumatra, have been cut, burned, and
changed into several land use types of various
What is the effect land use changes on
intensity. nematode diversity and abundance?
Land Use types observed
Methods Shrubs
(Imperata grassland)
FLI (Undisturbed forest)
Inventory
Time: May – June TBI-1 (Rubber) TBI-2 (Oil Palm)
004
2004
Site: Jambi
Benchmark,
Jambi
INDONESIA
CBLI (casava) FI (Disturbed forest)
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2. 5/27/2010
Field sampling:
30 sample points
(each 500 g soil core) were
taken randomly from 6 LUT Lab work:
20m
Nematodes
extraction using
Nematodes decantation and
centrifugation with
sugar solution
3m
6m
9m
12m
14m
100 specimens from each sample were
identified into generic level and functional
groups and then counted.
Results
100 nematode genera of 31 families, 8 orders,
and 5 feeding groups Feeding Groups
Orders Number of genera Plant parasite
(100 x)
Araeolaimida 3
Bacterial feeder
Dorylaimida 13 (400 x)
Rhabditida 40
40
Tylenchida 35
Enoplida 1
Monhysterida 3
Mononchida 4
Fungivore
Triplonchida 1 (100 x)
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3. 5/27/2010
Feeding Groups (cont.)
Omnivore
(400 x)
Diversity Abundance
30 1,000 a a
P o p u la t io n ( in d iv ./3 0 0 c c o f s o il)
a 900 a
25 800
a
ab
Predator 700 ab
20
era
(400 x) b
600
Number of gene
ab
15 500
400
10
300 b
5
200
100
0 -
CBLI TBI Shrub FI FLI CBLI TBI Shrub FI FLI
Land Use Types Land-use types
Feeding group relative abundance Nematode maturity index
CBLI TBI Shrub
3 PPI (plant parasitic)
2.5 MI (free‐living)
ndices
2
Maturity In
1.5
15
1
FI FLI Bacterial Feeders 0.5
Predators
0
Plant parasites
CBLI TBI Shrub FI FLI
Omnivores
Fungal Feeders Land Use Types
Conclusions
A total of 100 nematode genera of 31 families,8 orders, and
5 feeding groups were found in Jambi Benchmark, Indonesia.
The abundance of nematodes was low in more intensive LUT.
The bacterial feeder and plant parasite were two most abundant Thank You
Thank You
feeding groups of nematodes.
Maturity indices of plant parasitic nematodes were higher than
those of free-living nematodes but they were not sufficient to
indicate agro-ecosystem disturbance in Jambi Benchmark area.
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