利用聚类算法监测森林乔木物种多样性

衣海燕, 曾源, 赵玉金, 郑朝菊, 熊杰, 赵旦

Forest species diversity mapping based on clustering algorithm

YI Hai-Yan, ZENG Yuan, ZHAO Yu-Jin, ZHENG Zhao-Ju, XIONG Jie, ZHAO Dan

表4 最优生化组分所对应的植被指数及其计算公式

Table 4 Vegetation indices corresponding to the optimal biochemical components

生化组分 Biochemical component 植被指数 Vegetation index 计算公式 Formula 引用 Reference 叶绿素a/b Chl a/b TCARI/OSAVI TCARI/OSAVI [705,750] = 3[(R750.66 - R704.6) - 0.2(R750.66 - R550.67)(R750.66/R704.6)]/[(1 + 0.16)(R750.66 - R704.6)/(R750.66 + R704.6 + 0.16)] Daughtry et al., 2000; Wu et al., 2008 类胡萝卜素 Car CRI CRI = 1/R510 - 1/R550 Gitelson et al., 2002 水分 EWT WBI WBI = R895/R972 Penuelas et al., 1993 氮/磷 N/P CCCI CCCI = (0.7415R790 - 0.6965R720)/(0.0319R790 - 0.281R720) El-Shikha et al., 2007 比叶面积 SLA RVI RVI = R750/R705 Jordan, 1969 纤维素/木质素 Cel/Lig PRI PRI = (R531 - R570)/(R531 + R570) Gamon et al., 1992