基于植被光谱监测喀斯特异质性生境可行性研究

选取喀斯特与非喀斯特典型植被及共生植被，基于植被光谱分析和典范对应分析(CCA)探讨喀斯特植被光谱与喀斯特生境的关系。结果表明：在可见光波段范围(400～680 nm)的一阶导数光谱和短波红外波段(1 300～2 500 nm)的反射率光谱，喀斯特与非喀斯特植被光谱具有显著的差异特征;土壤水分含量和钙含量对喀斯特植被光谱特征具有较大影响，CCA二维排序图能够成功地将喀斯特植被与非喀斯特植被区分开。研究表明植被光谱特征与其生境条件密切相关，基于植被光谱特征来监测喀斯特异质性生境是可能的。

Feasibility of Monitoring Karst Standing Conditions with Vegetation Spectra

Karst regions are typically ecological fragile zones constrained by geological setting, which resulted in high heterogeneity of vegetation standing conditions. The karst vegetation was featured with stone, dry and high calcium carbonate content growth conditions. Based on vegetation spectral analysis and canonical correspondence analysis (CCA), the present study aimed to examine the feasibility of using vegetation spectra to monitor the heterogeneous karst standing conditions. The results showed that there were significant differences between karst vegetation and non-karst vegetation within the spectral range of 1 300～2 500 nm reflectance and 400～680 nm first-derivative spectra. It was found that soil moisture and calcium carbonate contents had the most significant effects on vegetation spectral features in karst regions. Ordination diagrams of CCA could distinguish the differences of karst vegetation and non-karst vegetation. Our study demonstrates that vegetation spectra are highly related to karst standing conditions and it is feasible to monitor karst standing conditions with vegetation spectral features.