Choi Jong-Yun, Kim Seong-Ki, Kim Jeong-Cheol, Yun Jong-Hak
National Institute of Ecology, Seo-Cheon Gun 33657, Chungcheongnam-do, Korea.
Animals (Basel). 2021 Dec 7;11(12):3489. doi: 10.3390/ani11123489.
The introduction of exotic species negatively affects the distribution and interactions within local biological communities in an ecosystem and can threaten ecosystem health. This study aimed to provide the basic data required to manage in the Yeongsan River basin. We identified the dispersion pattern and evaluated the ecosystem risk of this newly introduced species. The distribution survey investigated populations at 25 sites in the Yeongsan River basin over a four-year period. The initial introduction occurred in Jiseok Stream. The larvae of were most abundant in areas with a dense aquatic plant cover, whereas adults preferred silt/clay areas. The alterations in the water flow by the river refurbishment project (carried out in 2012) increased their preferred habitats and contributed to dispersion. However, stable isotope analysis showed that the dispersion has had little effect on the freshwater ecosystem. The interrelationship between (i.e., larvae and adults) and other biological communities has been limited. Although the rapid dispersion by in the Yeongsan River basin has not impacted the freshwater ecosystem, further ecological information is required on how to manage beyond this early stage of invasion.
外来物种的引入会对生态系统中当地生物群落的分布和相互作用产生负面影响，并可能威胁生态系统健康。本研究旨在提供管理荣山江流域[物种名称未给出]所需的基础数据。我们确定了该新引入物种的扩散模式，并评估了其生态系统风险。分布调查在四年时间里对荣山江流域25个地点的[物种名称未给出]种群进行了调查。最初引入发生在智石溪。[物种名称未给出]的幼虫在水生植物覆盖密集的区域最为丰富，而成虫则更喜欢淤泥/粘土区域。2012年实施的河流整治项目导致的水流变化增加了它们偏好的栖息地，并促进了[物种名称未给出]的扩散。然而，稳定同位素分析表明，这种扩散对淡水生态系统影响不大。[物种名称未给出]（即幼虫和成虫）与其他生物群落之间的相互关系有限。尽管[物种名称未给出]在荣山江流域的快速扩散尚未影响淡水生态系统，但在入侵的这个早期阶段之后，关于如何管理[物种名称未给出]还需要更多的生态信息。
