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森林冠层叶片被取食水平具有高度的时空变异性。本文论述了定量冠层昆虫取食水平的研究意义和方法,分析了各类取样方法和技术的优缺点,并对国内相关研究案例进行了评述。本文将定量冠层食叶昆虫取食水平的研究方法区分为针对绿叶样品的方法和针对落叶样品的方法。对冠层内绿叶的取样包括破坏性采叶法和原位连续观测法,依据取样技术又可分为基于地面的取样技术和基于冠层的取样技术。针对落叶样品的研究方法是指通过对林分内的凋落叶进行系统性采样、测定叶面积缺失比例、继而评估林分尺度上冠层昆虫取食水平的方法。文末提出了与森林昆虫取食相关的3个重点研究领域。
The level of forest canopy leaf feeding is highly spatiotemporal variability. This paper discusses the research significance and methods of quantitative feeding of canopy insects, analyzes the advantages and disadvantages of various sampling methods and techniques, and reviews the related domestic research cases. In this paper, the research methods of quantifying the feeding level of canopy insects are divided into the methods for green leaf samples and the methods for deciduous samples. The sampling of green leaves in the canopy includes the destructive plucking method and the in situ continuous observation method. According to the sampling technique, it can be divided into ground-based sampling technique and canopy-based sampling technique. The research method of deciduous samples refers to a method of systematically sampling the litter in the stands to determine the proportion of leaf area loss and then assess the canopy insect feeding level at stand size. At the end of this article, three key research fields related to forest insect feeding are proposed.