INTRODUCTION OF ENVIRONMENTAL DNA METHODS TO BENTHIC SURVEYS AT THE ESTUARY OF THE ZUIBAIJI RIVER, IMAZU TIDELAND, FUKUOKA CITY

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  • 福岡市今津干潟瑞梅寺川河口における底生生物調査への環境DNA手法の導入

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<p> The Imazu tideland is located at the estuary of the Zuibaiji River in Fukuoka City, which is an important habitat for rare species, such as Corbicula japonica, Batillaria multiformis, and Periophthalmus modestus. To prepare for future restoration and management of the tideland environment, we attempted to understand the status of benthic organisms by conventional morphological observation of the inflow river and to detect them from environmental DNA. Comparative analysis using the non-metric multidimensional scaling method revealed differences in biota between tidal flats and transitional areas to rivers. Although the number of species detected in the environmental DNA was small, we were able to obtain information on the presence and genetic diversity of Stosicia annulata, which could not be confirmed by morphological observation, as well as information on hybridization with the alien species Corbicula fluminea, thus confirming the effectiveness of the environmental DNA survey.</p>

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