Article Estimating Mangrove Above-Ground Biomass Loss Due to Deforestation in Malaysian Northern Borneo between 2000 and 2015 Using SRTM and Landsat Images Charissa J. Wong 1, Daniel James 1, Normah A. Besar 1, Kamlisa U. Kamlun 1, Joseph Tangah 2 , Satoshi Tsuyuki 3 and Mui-How Phua 1,* 1 Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia;
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[email protected] (K.U.K.) 2 Sabah Forestry Department, Locked Bag 68, Sandakan 90009, Sabah, Malaysia;
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[email protected] Received: 30 July 2020; Accepted: 26 August 2020; Published: 22 September 2020 Abstract: Mangrove forests are highly productive ecosystems and play an important role in the global carbon cycle. We used Shuttle Radar Topography Mission (SRTM) elevation data to estimate mangrove above-ground biomass (AGB) in Sabah, Malaysian northern Borneo. We developed a tree-level approach to deal with the substantial temporal discrepancy between the SRTM data and the mangrove’s field measurements. We predicted the annual growth of diameter at breast height and adjusted the field measurements to the SRTM data acquisition year to estimate the field AGB. A canopy height model (CHM) was derived by correcting the SRTM data with ground elevation. Regression analyses between the estimated AGB and SRTM CHM produced an estimation model (R2: 0.61) with 1 a root mean square error (RMSE) of 8.24 Mg ha− (RMSE%: 5.47).