Pleistocene sea level fluctuation and host plant habitat requirement influenced the historical phylogeography of the invasive species Amphiareus obscuriceps (Hemiptera: Anthocoridae) in its native range

BMC Evolutionary Biology

Research Article

Yahui Zhen¹  Zhen Ye¹  Chenguang Zheng¹  Wenjun Bu¹  Danli Zhang¹  Kazutaka Yamada² 

[1] Institute of Entomology, College of Life Sciences, Nankai University, 94 Weijin Road, 300071, Tianjin, China;Tokushima Prefectural Museum, Bunka-no-Mori Park, 770-8070, Hachiman-chô, Tokushima, Japan;

关键词: Dispersal ability;    East China Sea;    Cological niche modeling;    Genetic structure;    Habitat requirement;    Last Glacial Maximum;    Land bridge;   

DOI  :  10.1186/s12862-016-0748-3

 received in 2016-03-01, accepted in 2016-08-18,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundOn account of repeated exposure and submergence of the East China Sea (ECS) land bridge, sea level fluctuation played an important role in shaping the population structure of many temperate species across the ECS during the glacial period. The flower bug Amphiareus obscuriceps (Poppius, 1909) (Hemiptera: Anthocoridae) is an invasive species native to the Sino-Japanese Region (SJR) of East Asia. We tested the hypothesis of the ECS land bridge acting as a dispersal corridor or filter for A. obscuriceps during the glacial period. Specifically, we tested whether and the extent to which dispersal ability and host plant habitat requirement influenced the genetic structure of A. obscuriceps during the exposure of the ECS land bridge.ResultsPhylogenetic and network analyses indicated that A. obscuriceps is composed of two major lineages, i.e., China and Japan. Divergence time on both sides of the ECS was estimated to be approximately 1.07 (0.79–1.32) Ma, which was about the same period that the sea level increased. No significant Isolation by Distance (IBD) relationship was found between Фst and Euclidean distances in the Mantel tests, which is consistent with the hypothesis that this species has a good dispersal ability. Our Last Glacial Maximum (LGM) niche modeling of plants that constitute preferred habitats for A. obscuriceps exhibited a similar habitat gap on the exposed ECS continental shelf between China and Japan, but showed a continuous distribution across the Taiwan Strait.ConclusionOur results suggest that ecological properties (habitat requirement and dispersal ability), together with sea level fluctuation during the Pleistocene across the ECS, have shaped the genetic structure and demographic history of A. obscuriceps in its native area. The host plant habitat requirement could also be a key to the colonization of the A. obscuriceps species during the exposure of the ECS land bridge. Our findings will shed light on the potential role of habitat requirement in the process of biological invasion in future studies.

【 授权许可】

CC BY   
© The Author(s). 2016