Evaluating the relationships between aboveground biomass, LAI and NDVI using field and remotely sensed data at subtropical Cryptomeria japonica D. Don plantation site of Central Taiwan
Abstract
The sequestration of carbon dioxide of forest ecosystem plays a crucial role in the terrestrial land-atmosphere interaction. The relationship between leaf area index (LAI), key parameter for modeling the ecosystem productivity and normalized differential vegetation index (NDVI) had been reported and widely used over the past decades. However, few studies were made to evaluate plantation forest in subtropical zone. This study aims on the relationships between NDVI from SPOT images, in situ measurements LAI and aboveground biomass (AGB) for 62-yr old Cryptomeria japonica D. Don plantation site of central Taiwan as the basis for modeling the carbon cycle of forest ecosystem. In one square kilometer study area, the average AGB is 884.5 m3 ha-1, the correlation coefficient between AGB and NDVI is 0.431 (p< 0.001) and 0.586 (p <0.05)for 64 sub-plot (7.62 m radius circle) and 16 plot (250 m square wide) sites, respectively. LAI shows negative correlation -0.431(p=0.096) with NDVI in this mature conifer using Fisheye. It exist spatial variability of relationship between AGB, NDVI and LAI from plot level to site level. More Cryptomeria japonica D. Don plantation areas are needed to evaluate to avoid relationship with site-specific. Aboveground biomass vs. NDVI (from SPOT image) at 64 sub-plots Aboveground biomass vs. NDVI (from SPOT image) at 16 plots
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.B41C0301W
- Keywords:
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- 0414 BIOGEOSCIENCES / Biogeochemical cycles;
- processes;
- and modeling