Delineation of Geomorphological Woodland Key Habitats Using Airborne Laser Scanning

Remote Sensing

Hans Ole Ørka¹  Marie-Claude Jutras-Perreault¹  Jaime Candelas-Bielza¹  Terje Gobakken¹ 

[1] Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432 Ås, Norway;

关键词: remote sensing;    airborne laser scanning;    three-dimensional data;    habitats;    biodiversity;    geomorphology;   

DOI  :  10.3390/rs14051184

来源: DOAJ

【 摘 要 】

Forest ecosystems provide a range of services and function as habitats for many species. The concept of woodland key habitats (WKH) is important for biodiversity management in forest planning standards and certification schemes. The main idea of the WKH is to preserve biodiversity hotspots in the forest landscape. Current methods used in delineating WKH rely on costly field inventories. Furthermore, it is well known that the surveyor introduces an error because of the subjective assessment. Remote sensing may reduce this error in a cost-efficient way. The current study develops automated methods using airborne laser scanning (ALS) data to delineate geomorphological WKH, i.e., rock walls and stream gorges. The methods were evaluated based on a complete field inventory of WKH in a 1600 ha area in south-eastern Norway. The delineated WKH showed high detection rates, minor omission errors, but high commissions errors. Combining the delineation into a map of potential WKH suitable to guide field surveyors resulted in detecting all field reference WKH, i.e., a detection rate of 100% and a commission error of 25%. It is concluded that a higher degree of automatization might be possible to improve results and increase the efficiency of WKH inventories.

【 授权许可】

Unknown