Modeling of annual net primary production of a forest in the Taramakau Valley, Westland, New Zealand.

 

Liu Huan (2021). Modeling of annual net primary production of a forest in the Taramakau Valley, Westland, New Zealand. Journal of Environment and Health Science (ISSN 2314-1628). 2021 (02). https://doi.org/10.58473/JEHS0007

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Article 6. Modeling of annual net primary production of a forest in the Taramakau Valley, Westland, New Zealand

Author: Liu Huan (1983-), Master of Science (First Class Honours, 2009), The University of Auckland. ORCID: https://orcid.org/0000-0003-4881-8509

Advisor: George Perry, School of Environment, The University of Auckland

Formally published on 01/02/2021; Latest revised on 31/05/2023.

Abstract

Model provides a useful tool for the estimation of annual net primary production (NPP) in the terrestrial ecosystem. This project used Vensim software to design a numerical model of annual net primary production in a forest in the Taramakau Valley, Westland, New Zealand, based on the empirically derived correlations between forest growth and available resources. Atmospheric transmissivity, light use efficiency (LUE), light saturation point and water limitation factor were parameterized in this model. Light use efficiency (LUE) is considered as a function of atmospheric transmissivity in this model, which well indicates the daily variation in LUE. Sensitivity analysis was conducted to validate the parameters in this model. The results of this model have been validated by comparing with field studies or other models. The estimated NPP is 938.335g C/m2 in 2007, which is a reasonable value. Finally, the limitations and recommendations for future model development have been discussed, with application on the estimation of production in carbon sink forest.

Key words: Numerical Model, Net Primary Production, Light Use Efficiency, Atmospheric Transmissivity, Light Saturation Point, Water Limitation Factor, Carbon Sink Forest.