Mapping forest fuels through vegetation phenology: the role of coarse-resolution satellite time-series

PLoS One. 2015 Mar 30;10(3):e0119811. doi: 10.1371/journal.pone.0119811. eCollection 2015.

Abstract

Traditionally fuel maps are built in terms of 'fuel types', thus considering the structural characteristics of vegetation only. The aim of this work is to derive a phenological fuel map based on the functional attributes of coarse-scale vegetation phenology, such as seasonality and productivity. MODIS NDVI 250 m images of Sardinia (Italy), a large Mediterranean island with high frequency of fire incidence, were acquired for the period 2000-2012 to construct a mean annual NDVI profile of the vegetation at the pixel-level. Next, the following procedure was used to develop the phenological fuel map: (i) image segmentation on the Fourier components of the NDVI profiles to identify phenologically homogeneous landscape units, (ii) cluster analysis of the phenological units and post-hoc analysis of the fire-proneness of the phenological fuel classes (PFCs) obtained, (iii) environmental characterization (in terms of land cover and climate) of the PFCs. Our results showed the ability of coarse-resolution satellite time-series to characterize the fire-proneness of Sardinia with an adequate level of accuracy. The remotely sensed phenological framework presented may represent a suitable basis for the development of fire distribution prediction models, coarse-scale fuel maps and for various biogeographic studies.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Energy-Generating Resources
  • Fires*
  • Forests*
  • Models, Statistical*
  • Satellite Imagery*

Grants and funding

This research was funded within the Research Project “Agroscenari—Adaptation scenarios of Italian agriculture to climate change” by the Italian Ministry of Agriculture and Forestry with DM 8608/7303/08, 07 August 2008 (http://www.agroscenari.it). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.