Anaya_2020_RS_Drivers_of_Forest_Loss_in_Colombia.pdf (2.24 MB)
Drivers of forest loss in a megadiverse hotspot on the Pacific Coast of Colombia
journal contributionposted on 2020-05-20, 11:18 authored by JA Anaya, VH Gutiérrez-Vélez, AM Pacheco-Pascagaza, S Palomino-Ángel, N Han, Heiko Balzter
Tropical forests are disappearing at unprecedented rates, but the drivers behind this transformation are not always clear. This limits the decision-making processes and the effectiveness of forest management policies. In this paper, we address the extent and drivers of deforestation of the Choco biodiversity hotspot, which has not received much scientific attention despite its high levels of plant diversity and endemism. The climate is characterized by persistent cloud cover which is a challenge for land cover mapping from optical satellite imagery. By using Google Earth Engine to select pixels with minimal cloud content and applying a random forest classifier to Landsat and Sentinel data, we produced a wall-to-wall land cover map, enabling a diagnosis of the status and drivers of forest loss in the region. Analyses of these new maps together with information from illicit crops and alluvial mining uncovered the pressure over intact forests. According to Global Forest Change (GFC) data, 2324 km2 were deforested in this area from 2001 to 2018, reaching a maximum in 2016 and 2017. We found that 68% of the area is covered by broadleaf forests (67,473 km2) and 15% by shrublands (14,483 km2), the latter with enormous potential to promote restoration projects. This paper provides a new insight into the conservation of this exceptional forest with a discussion of the drivers of forest loss, where illicit crops and alluvial mining were found to be responsible for 60% of forest loss.
This research was funded by COLCIENCIAS, grant number 120671451240; British CouncilNewton-Caldas fund, grant number 261363478 and Universidad de Medellín, Call 41-2018.Victor H.Gutierrez-Velez received financial support from NASA (award number 80NSSC18K0339) for his contribution to this paper
CitationAnaya, J.A.; Gutiérrez-Vélez, V.H.; Pacheco-Pascagaza, A.M.; Palomino-Ángel, S.; Han, N.; Balzter, H. Drivers of Forest Loss in a Megadiverse Hotspot on the Pacific Coast of Colombia. Remote Sens. 2020, 12, 1235.
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