• 论文与研究报告 •

云南松3种切梢小蠹梢转干期竞争共存的时空生态位

1. 1. 中国林业科学研究院森林生态环境与保护研究所 国家林业和草原局森林保护学重点实验室 北京 100091
2. 贵州大学林学院 贵阳 550025
• 收稿日期:2018-06-28 出版日期:2020-03-25 发布日期:2020-04-08
• 通讯作者: 张真
• 基金资助:
国家自然科学基金项目(31370655);国家自然科学基金项目(31770693)

Spatiotemporal Niche of Competition and Coexistence of Three Tomicus spp. Infesting Pinus yunnanensis during the Transferring Stage from Shoots to Trunk

Chengxu Wu1,2,Fu Liu1,Xiangbo Kong1,Sufang Zhang1,Zhen Zhang1,*

1. 1. Key Laboratory of Forest Protection of National Forestry and Grassland Administration Research Institute of Forest Ecology, Environment and Protection, CAF Beijing 100091
2. College of Forestry, Guizhou University Guiyang 550025
• Received:2018-06-28 Online:2020-03-25 Published:2020-04-08
• Contact: Zhen Zhang

Abstract:

Objective: This study aims to elucidate the distribution regulation and relationship of competition and coexistence of three Tomicus minor, T. yunnanensis and T. brevipilosus (Coleoptera, Scolytidae) infesting Pinus yunnanensis shoots and trunks during the transferring stage from shoot to trunk, and provide theoretical support for population monitoring and integrated control of the three Tomicus species in the future. Method: Based on niche theory, the relationship between niche and population distribution of three Tomicus spp. feeding on P.yunnanensis during the transferring stage from shoot to trunk was studied by using sampling method with pruner in Xiangyun County, Yunnan province. Result: The peak time in both sexes of T. minor was later than that of T. yunnanensis in the crowns of P. yunnanensis, respectively, while there was no significant peak of T. brevipilosus. T. minor was distributed in the base of crowns, while T. yunnanensis and T. brevipilosus were distributed in the upper parts. In the early stage of invasion, T. yunnanensis was distributed in the whole stems of P. yunnanensis, and gradually distributed to the middle-upper part of stem as T. minor infested from the base to upper of stem. The population density of T. minor was significantly different in different heights of Yunnan pine trees, while that of T. yunnanensis was significantly different during the later stage of trunk-boring. There was significant difference in the temporal- and spatial- niche among the three Tomicus species, as well as between the sexes. The temporal-niche breadth in T. minor was more than that T. yunnanensi. On the contrary, the spatial-niche in T. minor was lower than that T. yunnanensi. Conclusion: T. minor and T. yunnanensis co-existed and homologously competed with each other through the allocation and compensation of spatial and temporal resources. The temporal resources in T. brevipilosus were separated from the former two beetle species.
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