Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/21535

Title: Estimation and dynamics of above ground biomass with very high resolution satellite images in Pinus pinaster stands
Authors: Gonçalves, Ana Cristina
Sousa, Adélia
Mesquita, Paulo
Keywords: Segmentation
Crown horizontal projection
Allometric functions
Forest inventory
Multitemporal dynamics
Issue Date: 2017
Citation: Gonçalves, A.C.; Sousa, A.M.O.; Mesquita, P.G.; 2017. Estimation and dynamics of above ground biomass with very high resolution satellite images in Pinus pinaster stands. Biomass and Bioenergy, 106. 146-154. doi.org/10.1016/j.biombioe.2017.08.026
Abstract: Biomass estimation is a tool for evaluating stands and forest dynamics. Traditional indirect methods use forest inventories and allometric functions at tree level to evaluate biomass at plot level, and an extrapolation method to assess an area. The goal of this study was the development of allometric functions for Pinus pinaster with crown horizontal projection derived from very high spatial resolution satellite images as an independent variable, as well as their application to the analysis of above ground biomass dynamics. The fitted functions show a good performance. The function used to estimate the above ground biomass per grid in 2004, 2007 and 2011 for the study area enable the evaluation of their temporal dynamics. From 2004 to 2007 it decreased in 90.5% of the study area, due to forest fires and cuts to control the pinewood nematode; from 2007 to 2011 increased in 45.6% and decreased in 51.6%, the latter corresponding to cuts to control the aforementioned disease. In 76.4% of the burnt areas, natural regeneration resulted in an increase of above ground biomass. The method's main advantages are the simultaneous evaluation of small or large areas and, when implemented in a GIS, it allows straightforward monitoring over a short period of time.
URI: http://www.sciencedirect.com/science/article/pii/S0961953417302787?via%3Dihub
http://hdl.handle.net/10174/21535
Type: article
Appears in Collections:ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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