Temporal dynamics of the arthropod community in Castanea henryi forests under different management modes
Author of the article:YE Shi-Sen1, 2** SHI Dan-Yang3 ZHENG Yu-Shan1 HU Feng-Yu2
Author's Workplace：1. Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Fujian Forestry Vocational Technical College, Nanping 353000, China; 3. Forest Disease and Pest Control Quarantine Station of Jian’ou City, Jian’ou 353100, China
Key Words：Castanea henryi forest, management mode, arthropod community, temporal dynamics
Abstract：[Objectives] To determine the influence of different management modes on the temporal dynamics of the arthropod community and key pest population numbers in Castanea henryi forests, and to provide a scientific basis for the management of forestry pests. [Methods] A systematic investigation of the arthropod community in C. henryi forests under five different management modes was conducted to analyze and compare the temporal dynamics of species richness, numbers of individuals, species diversity, ratio of natural enemies to pests and key pest population sizes. [Results] Under the five different management modes, the species richness, population size and species diversity of the forest canopy arthropod community differed, although temporal fluctuations were similar. Species richness and numbers of individuals were the highest in June and species diversity was the highest in May. Species diversity was the highest with careful management and no pesticide use, whereas species richness and numbers of individuals were highest in forests in which management had been abandoned. Species richness, numbers of individuals and species diversity in the undergrowth noticeably decreased under other management modes relative to forests in which management had been abandoned, and the temporal dynamics of these variables were very different. The ratio of natural enemies to pests in the forest canopy was the highest, and fluctuated most, in forests with careful management and no pesticide use, which was the most effective management regime for controlling pests. The population sizes of the key pest species Dryocosmus kuriphilus (Yasumatus), Curculio davidi Fairmaire, Asterolecanium castaneae (Russell), were obviously lower with careful management than in forests in which management had been abandoned or in those in which there was careless management. [Conclusion] Different management modes had a strong effect on the temporal dynamics of arthropod communities and key pest population quantities in C. henryi forests. Scientific and careful management contributed to the effective control of key pests.