摘要
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(400～680nm)的一阶导数光谱和短波红外波段(1 300～2 500nm)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。
Karst regions are typically ecological fragile zones constrained by geological setting, which resulted in high heterogene- ity 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 2 500 nm reflectance and 400~680 nm first-derivative spectra. and non-karst vegetation within the spectral range of 1 300 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.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第7期1891-1894,共4页
Spectroscopy and Spectral Analysis
基金
中国科学院西部行动计划(三期)项目(KZCX2-XB3-10)
中国科学院"西部之光"人才培养计划博士项目
国家自然科学基金项目(41071340
41001287)
湖南省自然科学基金项目(10JJ5017)资助
关键词
植被光谱
生境
典范对应分析
喀斯特
Vegetation spectra
Standing conditions
Canonical correspondence analysis
Karst
