Recently, the innovation team of the Chinese Academy of Fishery Sciences and the”Lake Ecological Fisheries innovation team” of the Freshwater Fisheries Research Center have made new progress in fish diversity research using Edna technology.
In recent years, as a non-invasive and environment-friendly biodiversity monitoring method, Edna has been increasingly applied to the study of fish diversity in freshwater ecosystems. It is easy to collect samples and quickly identify the characteristics of a large number of taxa, making it a good technical means to monitor the diversity of fish in prohibited areas.
For the first time, the team applied Edna technology to the study of fish diversity characteristics and their spatial changes in the no catch area Yangtze River Shijiu Lake River and lake complex ecosystem. The no fishing area includes three different types of water areas:Lake area, watercourse and river channel. After studying and comparing the number of fish taxa and fish diversity index of the three different types of water areas, the fish diversity of the system is evaluated, and the fish diversity characteristics of the river lake complex ecosystem different from the single type of water body are explored; Through technical analysis, the differences and connections among the fish communities of three different types of waters in the region are analyzed; The distribution characteristics of three migratory fish species in this area are deeply explored, and the possible connectivity of the Yangtze River Shijiu Lake complex system is discussed. The research shows that Edna technology is not only applicable to the study of fish diversity in different water areas, but also has great potential in the study of fish diversity in the river lake connectivity complex. It is of great significance to maintain the hydrological connectivity of the river lake system and better protect the river lake connectivity complex fish community.
Related research paper”using Edna to assess the fish diversity and spatial characteristics in the Changjiang River Shijiu Lake Co“Connected system” was published in the journal”ecological indicators” (impact factor 6.263) of JCR District I. He Wanlu, a graduate student of the aquatic biological resources research office of Danshui center, is the first author, and researcher Xu Dongpo is the corresponding author. This paper was supported by the national key R & D plan (2020yfd0900500) and the special fund for basic scientific research business expenses at the academy level of the Academy of Water Sciences (2020td61).
Full text link:https://doi.org/10.1016/j.ecolind.2022.108968