The objective of the thesis is to research Ragworm (Nereididae: Tylorrhynchus) in soil macrofauna community structure in the northern coastal area of Vietnam and identify some living environment conditions of the Ragworm in the study area. Ruoi habitats in the study area to provide scientific and practical basic for their conservation and development. | 1 MINISTRY OF VIETNAM ACADEMY EDUCATION AND OF SCIENCE AND TRAINING TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY ---------------------------- NGUYEN THI HA RESEARCH ON RAGWORM NEREIDIDAE TYLORRHYNCHUS IN SOIL ECOSYSTEM IN THE NORTHERN COASTAL AREA OF VIETNAM Major Theory of Zoology Major code 9 42 01 03 SUMMARY OF BIOLOGY DOCTORAL THESIS Ha Noi - 2020 2 3 The work was completed at Academy of Science and Technology - Vietnam Academy of Science and Technology. Science of supervisor 1 . of science Vu Quang Manh Science of supervisor 2 PhD. Le Hung Anh Science reviewer 1 Science reviewer 2 Science reviewer 3 The thesis will be defended in front of the Institute s doctoral thesis evaluation council meeting at the Academy of Science and Technology - Vietnam Academy of Science and Technology at hour date month year 2020. The thesis can be found at - Library of Academy of Science and Technology - Vietnam National Library 4 INTRODUCTION 1. Reasons to choose a topic With a coastline of more than 3 200 km along with dense estuary systems and monsoon tropical climate created for Vietnam in general and northern Vietnam in particular has estuary coastal ecosystem speciality and have the highest biological productivity. Groups include Mollusca Arthropoda Annelida and are component soil macrofauna community structure in the northern coastal area of Vietnam. In particular in phylum Annelida it is impossible not to mention genus Tylorrhynchus of the familia Nereidida ordo Phyllodocida class Polychaeta which has important role in the estuarine and marine ecosystems. In the world polychaeta are found in Japan South China Singapore Indonesia . with the number of discovered species of more than 5000 species divided into 86 families. This group have important role in the food chain and net additional ragworm are also considered as an indicator group of organisms to assess the quality of the water and bottom environment. In our country the appearance of ragworm has been .
