文献类型：期刊文献

中文题名：遥感在林冠动态监测研究中的应用

英文题名：APPLICATIONS OF REMOTE SENSING TO MONITORING FOREST CANOPY DYNAMICS

作者：郭志华[1] 肖文发[1] 蒋有绪[1]

第一作者：郭志华

机构：[1]中国林业科学研究院森林生态环境与保护研究所

年份：2003

卷号：27

期号：6

起止页码：851-858

中文期刊名：植物生态学报

外文期刊名：Acta Phytoecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：国家重点基础研究发展计划 973项目 ( 2 0 0 2CB1115 0 4);国家自然科学基金重大研究计划面上项目 ( 90 2 110 0 6);国家林业局重点实验室基金

语种：中文

中文关键词：林冠动态;遥感;监测;卫星遥感数据;航空遥感数据

外文关键词：Canopy dynamics, Remote sensing, Monitoring

分类号：S771.8;S758.7

摘要：林冠动态大致包括三方面的内容 ,即由病虫害、林火等引起的林冠变化、由大风等灾害引起的林隙动态、以及树冠和林冠的正常变化等。遥感在林冠动态研究中的地位和作用已被广泛认知 ,国内外在此方面的研究已积累了丰富经验。进行林冠动态研究所利用的遥感数据主要有LandsatTM卫星数据及各类航空遥感数据。卫星遥感数据与航空遥感数据具有各自的优势与不足。数据类型不同 ,研究的重点及研究方法也不尽相同。在较大尺度上 ,卫星遥感数据适合于研究林隙动态以及由病虫害等引起的林冠变化 ;而在较小尺度上 ,航空遥感数据更适于深入研究林隙动态、树冠变化和林冠的变化等。目前 ,具有高重复性和一致性的高分辨率多光谱数字正射航空影像在林冠动态研究中占据重要地位。随着更高分辨率资源卫星的相继升空 ,卫星遥感将在林冠动态研究中占据越来越重要的地位。过去的研究主要集中在林冠动态的检测与监测方面 。
Canopy dynamics are important in understanding the mechanisms regulating forest production and transition, and maintenance of forest biodiversity. The canopy is the place where important physiological processes such as photosynthesis, respiration, and transpiration occur, and it affects the primary forest production. Canopy dynamics include 3 types of changes: canopy changes caused by insect infestations, diseases, fires, and others; gap dynamics caused by strong winds like typhoons or hurricanes, landslides, floods, volcano eruptions, fires, and other disasters; and the normal changes of tree crowns and the forest canopy. Gradually, the role of remote sensing in detecting, monitoring and assessing forest canopy dynamics has become well established and both the advantages and disadvantages of this approach are widely understood. There are many publications in China and abroad regarding this research field. This paper has reviewed studies in applying remote sensing in the field of canopy dynamics in China and abroad up to the current date. It has looked into the different research emphases that each researcher selected, the methodologies they used, and the advantages and disadvantages involved. It tries to derive some useful suggestions for future research in this field. In summary, the remote sensing data used for canopy dynamics can be divided into two types: one is the satellite remote sensing data such as TM, MSS, and SPOT HRV, the other is aerial remote sensing data. Each of these two kinds of data has its respective advantages and disadvantages. Different data can be used to satisfy different research emphases and different methods and techniques are required accordingly. Satellite data can be used in measuring gap dynamics and canopy changes due to diseases, insects and fires in a large scale. Airborne remote sensing data can be used in monitoring the changes of individual trees, gaps and canopies in a finer scale. In recent years, highly reproducible and consistent orthorectified aerial photographs, in a digital format, have played a very important role in detecting and monitoring changes of tree crowns and the forest canopy. The higher resolution satellite remote sensing data, which will be available soon, would be more suitable for detecting and monitoring canopy dynamics. The existing studies have emphasized the mapping and monitoring of forest canopy, and the mechanism of canopy dynamics will be paid more attention to in the future since such research will provide more in_depth information in modeling the forest growth, forest production, and forest biodiversity.