Assessment of oak forest condition based on leaf biochemical variables and chlorophyll fluorescence

被引:35
作者
Rossini, Micol [1 ]
Panigada, Cinzia [1 ]
Meroni, Michele [1 ]
Colombo, Roberto [1 ]
机构
[1] Univ Milan, Remote Sensing Environm Dynam Lab, Dipartimento Sci Ambiente & Terr, I-20126 Milan, Italy
关键词
foliar pigments; leaf reflectance; optical indices; photosynthetic efficiency; Quercus robur; stress detection;
D O I
10.1093/treephys/26.11.1487
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Pedunculate oak forests (Quercus robur L.) in the Ticino Regional Park, Italy, are declining as a result of insect attacks, summer droughts and air pollution. The assessment and monitoring of forest condition can provide a basis for managing and conserving forest ecosystems and thereby avoid loss of valuable natural resources. Currently, most forest assessments are limited to ground-based visual evaluations that are local and subjective. It is therefore difficult to compare data collected by different crews or to define reliable trends over years. We examined vegetation variables that can be quantitatively estimated by remote observations and, thus, are suitable for objective monitoring over extended forested areas. We found that total chlorophyll (Chl) concentration is the most suitable variable for assessing pedunculate oak decline. It is highly correlated with visual assessments of discoloration. Furthermore, Chi concentration can be accurately estimated from leaf optical properties, making it feasible to map Chi concentration at the canopy level from satellite and airborne remote observations.
引用
收藏
页码:1487 / 1496
页数:10
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