不同经营管理方式对锥栗林节肢动物群落结构与多样性的影响

Effects of different management modes on the structure and diversity of arthropod community in Castanea henryi forest

通过对不同经营管理方式下锥栗林节肢动物群落的调查,研究了生产上典型的5种经营管理方式对锥栗林节肢动物群落结构与多样性的影响。结果表明:5种不同经营管理方式下锥栗林节肢动物群落结构和多样性有较大差别,管理精细未用药型的锥栗林物种多样性和稳定性最高,植食性集团的多样性指数最高,天敌功能集团的相对丰盛度最高,对害虫的自然控制效能高,不利于优势害虫的暴发;相比管理撂荒型,精细的经营管理会提高林冠层物种多样性,而化学农药的使用降低了各功能集团的物种多样性、均匀度,提高了植食性集团的相对丰盛度。

An investigation was conducted on the arthropod community in Castanea henryi forest under five different management modes, to study the effects of the management modes on the structure and diversity of arthropod community. Under the five different management modes, the structure and diversity of arthropod community had greater difference. In the C. henryi forest with careful management and no application of chemicals, arthropod community had the highest spe cies diversity and stability, the diversity index of phytophagous groups was the highest, and the relative abundance of natural enemy groups was also the highest, which had high effectiveness in controlling pests and was disadvantageous to the outbreak of dominant pests. In contrast to the managementabandoned mode, careful management would improve the species diversity of canopy groups, but the use of chemical pesticides would decrease the species diversity and evenness of each functional group, and increase the relative abundance of phytophagous groups.