Abstract:
The pigment of interest in this study are Chl a, Chl b and carotenoids as it is
realized as important factor in determining the photosynthetic potential and also primary
production. Their relation with spectral reflectance is being studied. The mangrove
species chosen for this study are Rhizophora apiculata and Sonneratia caseolaris. The
sample are collected in two ranges which are young (DBH < 10 cm) and mature (DBH >
10 cm). Chl a is the prominent pigment compare to Chl b and Cars in all samples with
range 18.0180 - 27.4493 mg/L while total Cars in leaves are the least with range 5.9213
- 10.8569 mg/L. The spectral reflectance of all samples show similar pattern but varied in
reflectance data. Data show that all samples are reflecting more in NIR region which is
up to 60.33%. The young species show higher reflectance value than mature in both
species. The mean of Chl a and Cars concentration in young species studied show no
relation but for mature stand there is relationship. However, the result is reversely in Chl
b. Overall, the relationship between pigment concentration and the spectral reflectance in
the blue region showed high correlated while no systematic differences in the green
region. In general, the coefficients of determination in the red region have much lower
value than other region.
