@misc{10481/80322,
year = {2023},
month = {1},
url = {https://hdl.handle.net/10481/80322},
abstract = {Wildfire disturbances can profoundly impact many aspects of both ecosystem functioning and resilience. This
study proposes a satellite-based approach to assess ecosystem resilience to wildfires based on post-fire trajectories
of four key functional dimensions of ecosystems related to carbon, water, and energy exchanges: (i)
vegetation primary production; (ii) vegetation and soil water content; (iii) land surface albedo; and (iv) land
surface sensible heat. For each dimension, several metrics extracted from satellite image time-series, at the short,
medium and long-term, describe both resistance (the ability to withstand environmental disturbances) and recovery
(the ability to pull back towards equilibrium). We used MODIS data for 2000–2018 to analyze trajectories
after the 2005 wildfires in NW Iberian Peninsula. Primary production exhibited low resistance, with abrupt
breaks immediately after the fire, but rapid recoveries, starting within six months after the fire and reaching
stable pre-fire levels two years after. Loss of water content after the fire showed slightly higher resistance but
slower and more gradual recoveries than primary production. On the other hand, albedo exhibited varying levels
of resistance and recovery, with post-fire breaks often followed by increases to levels above pre-fire within the
first two years, but sometimes with effects that persisted for many years. Finally, wildfire effects on sensible heat
were generally more transient, with effects starting to dissipate after one year and overall rapid recoveries. Our
approach was able to successfully depict key features of post-fire processes of ecosystem functioning at different
timeframes. The added value of our multi-indicator approach for analyzing ecosystem resilience to wildfires was
highlighted by the independence and complementarity among the proposed indicators targeting four dimensions
of ecosystem functioning. We argue that such approaches can provide an enhanced characterization of ecosystem
resilience to disturbances, ultimately upholding promising implications for post-fire ecosystem management and
targeting different dimensions of ecosystem functioning.},
organization = {Portuguese national funds through FCT-Foundation for Science and Technology, I.P.	PCIF/RPG/0170/2019},
organization = {Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT)},
organization = {European Social Fund, within the 2014-2020 EU Strategic Framework, through FCT	SFRH/BD/99469/2014},
organization = {Individual Scientific Employment Stimulus Program (2017), through FCT	CEECIND/02331/2017},
organization = {Ministerio de Ciencia e Innovacion/Universidad de Granada/FEDER	Life-Watch-2019-10-UGR-01},
organization = {RESISTE - Consejeria de Economia, Conocimiento y Universidad from Junta de Andalucia/FEDER	P18-RT-1927},
publisher = {Elsevier},
keywords = {Ecological disturbance},
keywords = {Ecological resilience},
keywords = {Post-fire recovery},
keywords = {Satellite image time-series},
keywords = {Tasseled cap transformation},
keywords = {Land surface temperature},
title = {Assessing the resilience of ecosystem functioning to wildfires using satellite-derived metrics of post-fire trajectories},
doi = {10.1016/j.rse.2022.113441},
author = {Marcos, Bruno and Alcaraz Segura, Domingo},
}