PS 64-8 - Detection of an endangered aquatic heteropteran using environmental DNA in a wetland ecosystem

Friday, August 11, 2017
Exhibit Hall, Oregon Convention Center
Izumi Katano1, Hideyuki Doi2, Yusuke Sakata3, Rio Souma3, Toshihiro Kosuge4, Mariko Nagano2, Kousuke Ikeda4, Koki Yano5 and Koji Tojo5, (1)Department of Chemistry, Biology, and Environmental Science, Nara Women's University, Japan, (2)Graduate School of Simulation Studies, University of Hyogo, Japan, (3)School of Human Science and Environment, University of Hyogo, Himeji, Japan, (4)Pacific Consultants Co., LTD.,, Tokyo, Japan, (5)Faculty of Science, Shinshu University, Matsumoto, Japan
Background/Question/Methods

The use of the environmental DNA (eDNA) has recently been employed to evaluate the distribution of various aquatic macroorganisms. Although this technique has been applied to a broad range of taxa, from vertebrates to invertebrates, its application is limited for aquatic insects such as aquatic heteropterans.Nepa hoffmanni (Heteroptera: Nepidae) is a small (~23 mm) aquatic hemipteran that inhabits wetlands, can be difficult to capture, and is endangered in Japan. The molecular tool environmental DNA (eDNA) was used to evaluate the species distribution of N. hoffmanni in comparison to that determined using hand-capturing methods in two regions of Japan.


Results/Conclusions

The eDNA of N. hoffmanni was detected at nearly all sites, including sites where N. hoffmanni was not captured by hand. Thus, this species-specific eDNA technique can be applied to detect small, sparsely distributed heteropterans in wetland ecosystems. In conclusion, eDNA could be a valuable technique for the detection of aquatic insects inhabiting wetland habitats, and could make a significant contribution to providing distribution data necessary to species conservation.