Bird diversity richness is an ecological indicator of natural based terrestrial and aquatic ecosystem quality

1. Land use changes affecting the bird
diversity: A comparison study at different
level of disturbed tanks in Vavuniya district
K.S.Sivanesan 1

2. Inroduction
• Bird diversity richness is an ecological indicator
of natural based terrestrial and aquatic
ecosystem quality
Study area
Disturbed (urban area: Vairavapuliyankulam tank)-33.7
Semi Disturbed (paddy field area:Nelukkulam)-30.5
Undisturbed (forest area: Kombuvaithakulam tank)-93.5
2

3. Objective
• study was to compare avian species richness
and numbers of individuals at three different
levels of disturbance.
3

4. Method
Systematically selected six transects (100x100 m) was
used for birds watching at three tanks.
Peak observing hours were between 0630 to 0800 and
1630 to 1800 h weekdays.
4

5. Disturbed
5

6. Semi Disturbed
Nelukulam
6

7. Undisturbed
7

8. Results
Tank Total species Total count Abundance species
Disturbed 32 2873±15 Intermediate Egret
Semi Disturbed 41 3420±20 Black-headed Ibis
Undisturbed 54 4938±25 Painted stork
Intermediate Egret Black-headed Ibis Painted stork 8

9. Result
• D - were Intermediate Egret>Little egret> Black-headed
Ibis
• SD - Black-headed Ibis> Intermediate Egret>
Painted stork
• UD - Painted Stork> Intermediate Egret > Black-headed
Ibis
9

10. Discussion
• Our results showed clearly, while of
apparently ‘low-impact’, had a similar
influence as much greater levels of human
activity. The mean number of species in
undisturbed tank was significantly greater
than disturbed tank.
10

11. Discussion
• study confirmed that birds were significantly
influenced by the activities of humans;
compared to those living in completely
undisturbed locations, birds living in locations
experiencinghigh levels of disturbance were
characterised by significantly lower species
richness.
11

12. Conclusion
• This study indicates these areas had the high
species richness of birds and the eco touristic
potential. These are very important area for
bird conservation and bird watching study.
Land use changes have the positive
correlation with affecting the biodiversity.
12

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