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Hongyan Hu and Zhipeng Li passed their graduation thesis defense

2016年6月20日

On the 1th June,  two master students in soil ecology group, Hongyan Hu and Zhipeng Li passed their graduation thesis defense.

Insect herbivory is important process in ecological system. It’s not only affect plant growing and community composition, but also affect ecosystem productivity and nutrient cycling within ecosystems. As forest fragmentation is intensifying, the effect of fragmentation on ecological system process is becoming a hot issue of ecological research in recent years. In order to understand how forest fragmentation effect on insect herbivory, Hongyan Hu surveyed insect herbivory of dominant tree species in four rain forest fragments and eleven evergreen broad-leaved forest fragments and continuous forest in Nabanhe National Reserve of Xishuangbanna. Her results showed that forest fragmentation could cause mean herbivory frequency of dominant species decreased significantly, but had no significant effect on mean herbivory of them. Forest type and season could influence insect herbivory of dominant species in forest fragments significantly, but fragment area, tree diversity and leaf characteristics were not correlated with insect herbivory of dominant species.

DSC_0888Photo of Hongyan Hu(胡鸿雁) with her supervisor Zheng Zheng(郑征)

Soil nematodes play a key role in many important ecological processes such as nutrients cycling and vegetation succession. However, it needs still further studies to explore the relative importance and characteristic scale of niche processes and neutral processes on soil nematodes community assemblage, especially for tropical seasonal rainforests. Through high intensively collecting spatial information about topography, soil properties, litter fall, vegetation and nematodes community structure, Zhipeng Li found that biotic and abiotic environmental heterogeneities are important for nematodes community assemblage in tropical seasonal rainforests. It might have important influence on ecosystem function and maintenance of aboveground biodiversity.

DSC_0882Photo of Zhipeng Li(李志鹏) with his supervisor Xiaodong Yang(杨效东)

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