613
2. Population: Values assigned to different population density classes are given
below:
<100
100
101–500
80
501–1000
60
1001–5000
40
5001–10,000
20
>10,000
10
Average of [Map of individual anthropogenic parameter (based on the distance
from the stress) + Map of Distance from the habitation + Map of Population density] × weightage of each anthropogenic parameter
(a) Pollution
No pollution
100
500 m or more is the distance of the source from the mangrove stand
60
100–500 m or more is the distance from the mangrove stands
30
Less than 100 m or more is the distance from the mangrove stands
10
(b) Reclamation of mangrove forest (aquaculture/salt pans/residential/any other
developmental activities)
Presence/Absence. Reclamation is High stress (10). No reclamation means no
stress (100)
(c) Embankment- Presence of embankment in a creek which is the only source of
freshwater for a patch will be unhealthy – 10
Presence/Absence. Presence is High stress (10). Absence is no stress (100)
(d) Grazing in the mangrove patch
Presence/Absence. Presence is High stress (10). Absence is no stress (100)
(e) Grazing near the mangrove patch
Presence/Absence. Presence is High stress (10). Absence is no stress (100)
(f) Direct cutting of mangroves
Presence/Absence. Presence is High stress (10). Absence is no stress (100)
Single value based on above (can be entered as a field in the 1 ha grid shape file)
19 Mangrove Inventory, Monitoring, and Health Assessment