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Biometric and micrometeorological approaches for estimation of net ecosystem productivity in tropical rain forest ecosystem using modis satellite data

Rasib, Abd. Wahid and Ibrahim, Ab. Latif and Cracknell, A. P. and Md. Noor, Nur Supardi and Kassim, Abd. Rahman and Hamzah, Khali Aziz and Abdullah Sani, Muhammad Firdaus (2010) Biometric and micrometeorological approaches for estimation of net ecosystem productivity in tropical rain forest ecosystem using modis satellite data. In: MRSS 6th International Remote Sensing & Gis Conference and Exhibiton (MRSS 2010), 28-29 April 2010, PWTC, Kuala Lumpur.

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Abstract

Net ecosystem productivity (NEP) is one of the essential ecology components which determine the ability of carbon sequestering in forest ecosystem. From NEP, the carbon sequestration in particulars forested area can be identified under two circumstances either as carbon sink (+ve) or as carbon source (-ve). Generally, NEP is the difference between net primary productivity (NPP) and heterotrophic respiration (R h) that means the amount of carbon lost or gained by the ecosystem can calculated. There are two common methods to estimate the NEP, the biometric and micrometeorological approaches that have been widely used recently. Thus, in this present study both approaches have been employed to estimate NPP for Pasoh Forest Reserve, N. Sembilan, Malaysia, as well as to determine the level of carbon sequestration. Therefore, series of census data conducted by Forest Research Institute Malaysia (FRIM) will be used to calculate the total aboveground biomass based on the biometric approach. This approach employed the summation method established by Kato et al. (1978). For micrometeorological approach, Moderate Resolution Imaging Spectroradiometer (MODIS) images using three spectral different bands; visible band, near infra-red band, ocean bands (band 11 and band 12) have been utilized. This approach is based on "continuous field model" developed by Rahman. As a result, 6 years NEP values from 2000 to 2005 using both approaches have been successfully estimated. The result shows that the NEP values from biometric approach decreased from -16.462 t ha -1 yr -1 to -38.252 t ha -1 yr -1 and result from micrometeorological approach are in the range of 0.354 t ha -1 yr -1 to -6.657 t ha -1 yr -1 . As a conclusion, the pattern of annual carbon sequestration at Pasoh Forest Reserve is determined as carbon source from year 2000 to 2005 from biometric and micrometeorological approaches, respectively. Discover the world's research

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Net Ecosystem Productivity, Biometric approach, micrometeorological approach
Subjects:G Geography. Anthropology. Recreation > G Geography (General)
Divisions:Geoinformation Science And Engineering (Formerly known)
ID Code:23846
Deposited By: Mrs Liza Porijo
Deposited On:15 Jun 2012 03:40
Last Modified:28 Aug 2017 07:52

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