Net primary productivity estimation and its relationship with tree diversity for tropical dry deciduous forests of central India.

摘要

Present study aims at estimation and validation of net primary productivity (NPP) using production efficiency model (PEM), and its possible relationship with tree diversity. The PEM estimates NPP, based on light use efficiency (LUE) and intercepted photosynthetically active radiation (IPAR). Weighted average LUE varied between 0.02 gC/ micro mol/m2 of PAR (Mixed forest (miscellaneous)) to 0.08 gC/ micro mol/m2 of PAR (Acacia forest), in growing phase (GP), and 0.0008 gC/ micro mol/m2 of PAR (Boswellia mixed forest) to 0.023 gC/ micro mol/m2 of PAR (Acacia forest) during the senescent phase (SP). The average weighted LUE for tropical dry and Moist deciduous forest (MDF) in GP were 0.05 gC/ micro mol/m2 of PAR and 0.03 gC/ micro mol/m2 of PAR, respectively. The average IPAR for different forest types was 2079.58 micro mol/m2/s during GP and 1510.58 micro mol/m2/s during SP. The PEM based NPP varied between 0.58-275.78 gC/m2/year during GP and 0.43-74.34 gC/m2/year during SP. The PEM based NPP and conventional (ground based) NPP were related with R2 of 0.55. The tree diversity and NPP relationship was observed with R2 of 0.55 at the level of both plot and forest types.