Structural dynamics in the host-parasitoid system of the pine needle gall midge ( Thecodiplosis japonensis ) during invasion

PeerJ

article

Won Il Choi¹  Mun-Jang Jeon²  Young-Seuk Park³ 

[1] Division of Forest Insect Pests and Diseases, National Institute of Forest Science;Department of Forest Resources, Daegu University;Department of Biology, Kyung Hee University;Department of Life and Nanopharmaceutical Sciences, Kyung Hee University

关键词: Pine needle gall midge;    Invasive species;    Thecodiplosis japonensis;    Host–parasitoid;    Competition;    Parasitoid;   

DOI  :  10.7717/peerj.3610

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The structural dynamics of host–parasitoid populations play a key role in the mechanism of natural community development with invasive species. Species invading new habitats experience coevolution with their newly acquired natural enemies, and their population dynamics are driven by a complex interaction between biological and environmental factors. We examined the biological and environmental factors which potentially influence a community of parasitoids throughout the 25-year invasion history of the pine needle gall midge (PNGM), Thecodiplosis japonensis, an important pest of pines in eastern Asia. We found that differences in establishment sequence and competitive ability among the parasitoids attacking this species determined the parasitoid community’s structure and dynamics. In particular, the timing for the initial establishment of the host–parasitoid association, incomplete superiority in competition among parasitoids, and indirect competition by a combination of the parasitoids were important factors for determining community’s structure and dynamics. Finally, the history of change in the community composition could be explained by the phenology differences in its member species, mediated by environmental factors.

【 授权许可】

CC BY