Use of an Airborne Lidar System to Model Plant Species Composition and Diversity of Mediterranean Oak Forests
Use of an Airborne Lidar System to Model Plant Species Composition and Diversity of Mediterranean Oak Forests
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DOI：
10.1111/j.1523-1739.2012.01869.x
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发表时间：
2012-10
影响因子：
6.3
通讯作者：
W. Simonson;H. Allen;D. Coomes
中科院分区：
文献类型：
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作者：
W. Simonson;H. Allen;D. Coomes
摘要：机载激光雷达是一种遥感工具，由于其能够表征三维植被结构，在生态和保护研究中越来越重要。如果植物物种多样性和组成的不同方面可以与植被结构相关联，则植物群落的景观水平评估可能是可能的。我们研究了这种可能性，在葡萄牙南部，这是丰富的生物多样性，但也受到威胁的地中海橡树林。我们比较了从31块软木橡树（Quercus suber）和阿尔及利亚橡树（Quercus canariensis）森林中收集的离散，第一次和最后一次返回激光雷达数据集的数据与现场数据，以测试激光雷达是否可用于预测植被的垂直结构，植物物种多样性和群落类型。激光雷达和现场测量的结构数据显著相关（r= 0.85）。森林物种多样性与激光雷达测量的植被高度显著相关（R2= 0.50，p < 0.001）。聚类和排序的物种数据指出，存在2个主要的森林类，可以区分与89%的激光雷达数据的基础上的准确性。激光雷达可广泛应用于生境测绘和生境条件评估（例如，支持欧洲物种和物种指令[92/43/EEC]）。然而，需要特别注意测量设计问题：激光雷达点的密度和地面实况的地理空间精度及其与激光雷达数据采集相关的时间。
Abstract: Airborne lidar is a remote‐sensing tool of increasing importance in ecological and conservation research due to its ability to characterize three‐dimensional vegetation structure. If different aspects of plant species diversity and composition can be related to vegetation structure, landscape‐level assessments of plant communities may be possible. We examined this possibility for Mediterranean oak forests in southern Portugal, which are rich in biological diversity but also threatened. We compared data from a discrete, first‐and‐last return lidar data set collected for 31 plots of cork oak (Quercus suber) and Algerian oak (Quercus canariensis) forest with field data to test whether lidar can be used to predict the vertical structure of vegetation, diversity of plant species, and community type. Lidar‐ and field‐measured structural data were significantly correlated (up to r= 0.85). Diversity of forest species was significantly associated with lidar‐measured vegetation height (R2= 0.50, p < 0.001). Clustering and ordination of the species data pointed to the presence of 2 main forest classes that could be discriminated with an accuracy of 89% on the basis of lidar data. Lidar can be applied widely for mapping of habitat and assessments of habitat condition (e.g., in support of the European Species and Habitats Directive [92/43/EEC]). However, particular attention needs to be paid to issues of survey design: density of lidar points and geospatial accuracy of ground‐truthing and its timing relative to acquisition of lidar data.