关键词: 褐飞虱, 刺吸取食行为, EPG技术, CO₂浓度, 生长发育

Abstract: The landscape heterogeneity of island vegetation is one of the important indicators of island ecosystem health, the change and mechanism for landscape heterogeneity affect ecological processes of island ecosystem. In this paper, we addressed the spatial distribution characteristics of spatial heterogeneity of Dachangshan Island vegetation landscape and their relationship with the topographical factors by using the remote sensing technology and landscape ecology approach. The results showed that landscape heterogeneity was mainly shaped by the topographical factors of elevation and slope in a similar way. Both elevation and slope were negatively correlated to the landscape heterogeneity parameters, including areaweighted mean patch fractal dimension (AWMPFD), total edge perimeter (TE), the number of patches (NP) and areaweighted mean shape index (AWMSI), and positively related to the middle patch size (MPS), mean patch edge density (MPE) in a descending order. The relationship between aspect and landscape heterogeneity index was much weaker when compared with slope and elevation in a small-scale area, aspect was not correlated with either TE or MPE, and only weakly correlated with other four landscape indices.

Key words: growth and development, EPG technology., CO₂ concentration, Nilaparvata lugens, suckfeedingbehavior