EU-funded postdoc Cici Alexander completed her 2 year position with Ross Hill and Amanda Korstjens in September 2017. In this time she analysed LiDAR and UAV imaging data to identify trees and forest structural characteristics for the tropical forests that LEAP works at in Indonesia. The newest paper is hot off the press while another paper is in review. In the new paper, Cici shows a method of using drone-mounted cameras to measure and identify tree structures and variation to locate emergent trees at LEAP’s main field site Sikundur, Sumatra, Indonesia. Emergent trees are important for primate sleep sites and serve many other essential roles in tropical forests, but they are also the most vulnerable trees to selective logging.
The work is done in collaboration with our charity partners (Matt Nowak, Graham Usher) at Sumatran Orangutan Conservation Programme, and Serge Wich from Liverpool John Moores University as well as Dr Abdullah from our international partner Universitas Syiah Kuala. Authors also include ISLHE-LEAP PhD student Emma Hankinson and LEAP MRes student Nathan Harris who were vital in verifying the method on the ground.
Alexander et al. LEAP paper
(Special limited duration paper access link: https://authors.elsevier.com/a/1XAhj14ynSEdoi).
Her first two papers were technical notes on:
‘Influence of micro-topography and crown characteristics on tree height estimations in tropical forests based on LiDAR canopy height models‘ 2018
‘Structural attributes of individual trees for identifying homogeneous patches in a tropical rainforest‘ 2017
Based on LiDAR data from Batang Toru, Sumatra, Indonesia where the newly identified and highly threatened Tapanuli orangutans occur and a planned dam is threatening the ecosystem.
For more information on the ‘LEAP: Landscape Ecology and Primatology’ research group, visit our website or like our facebook page. Our work featured also in the BU2012-2018 review (p17).
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