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Using the satellite images to verify the hypothesis that China Fujian bamboo forest pest outbreaks are due to biodiversity loss

利用卫星图像验证中国福建竹林病虫害爆发是由于生物多样性丧失的假设

基本信息

批准号：
23405005
负责人：
WANG Xiufeng
金额：
$ 11.23万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011-04-01 至 2014-03-31
项目状态：
已结题

项目摘要

This study indicates that the Landsat time series can be used to effectively monitor the bamboo forest and used to map the bamboo forest distribution and growth situation. The results show that the total bamboo forest area and damaged areas were both increasing from the late 1980s to early 1990s. However, there was a decrease in damaged bamboo forest area after late 1990s. In addition, severe damage of pest mites is less with lower temperatures in winter.We observed the population dynamics of pest mites and their predators in the Moso bamboo forest in Nanping district, China. From this survey, we learned that the injury spots of Moso bamboo leaves remained at least one year after the pest mite occurrence. We made a simulation model, which was describing a system with one common predator, and two prey species on two different plants. By using this model, we found theoretically that the outbreak of bamboo pest mite did not occur in a bamboo forest with silver grass.

本研究表明，Landsat时间序列可以有效地监测竹林，绘制竹林分布和生长状况图。结果表明，从20世纪80年代末到90年代初，竹林总面积和受损面积都在增加。然而，20世纪90年代后期以后，受损竹林面积有所减少。此外，冬季气温较低，害螨危害较轻。我们在南平毛竹林中观察了害螨及其天敌的种群动态。通过这次调查，我们得知，毛竹叶片的伤斑在害螨发生后至少一年内仍存在。我们制作了一个模拟模型，该模型描述了一个系统，该系统具有一种常见的捕食者和两种不同植物上的两种猎物。通过该模型，我们从理论上发现，有芒草的竹林中不会发生竹害螨的爆发。