POST-FIRE RESPONSE ANALYSIS BASED ON LANDSAT TIME SERIES IN ARAUCARIA- LENGA FORESTS IN SOUTH-CENTRAL CHILE.

• DOI: 10.22533/at.ed.3173202307064

• Palavras-chave: -

• Keywords: Time series, NDVI, Pheology, Wildfires, Araucaria araucana.

• Abstract:

  Phenological processes such as the appearance or abscission
  of leaves depend on the environmental conditions in which a
  plant or plant community develops. Anthropic disturbances
  such as forest fires can modify these conditions, affecting
  phenology. Free access satellite information allows the
  monitoring of vegetation over time. In this work, the
  phenology of Andean forests of Araucaria araucana
  (araucaria) associated with Nothofagus pumilio (lenga) from
  south central Chile was analyzed using NDVI time series
  with the objective of identifying seasonal changes, trends or
  abrupt changes related to forest fires that occurred between
  1998 and 2021. The results show that the start (SOS) and end
  of the growing season (EOS) could be related to the fire
  events. In addition, abrupt changes in the trend component
  coincident with the fire events were detected. These
  preliminary results lay a foundation to continue studying the
  phenological behavior of these forests under different
  environmental conditions.