Summary of Biology doctoral thesis: Studies on biodiversity and economic potential of seaweeds in Phu Yen province

Immediate objective: Identification of the seaweed species composition and its distribution characteristics; evaluation of economic potential seaweed species to establish and manage its exploitation and conservation areas in Phu Yen province.
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Summary of Biology doctoral thesis: Studies on biodiversity and economic potential of seaweeds in Phu Yen province MINISTRY OF EDUCATION VIETNAM ACADEMY OF AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY ……..….***………… NGUYEN THI THU HANG STUDIES ON BIODIVERSITY AND ECONOMIC POTENTIAL OF SEAWEEDS IN PHU YEN PROVINCE Specialty: Ecology Code: 9 42 01 20 SUMMARY OF BIOLOGY DOCTORAL THESIS Ha Noi – 2021 This thesis is completed at: Graduate University of Science and Technology - Vietnam Academy of Science and Technology Supervisors: 1. Nguyen Ngoc Lam, Prof., Ph.D. 2. Nguyen Van Tu, Ph.D Referee 1: …………………………………… Referee 2: …………………………………… Referee 3: …………………………………… This Dissertation will be defended in front of the Dotoral Examination Board of Graduate University of Science and Technology, Vietnam Academy of Science and Technology at …..:…. H, Date ....../....../2021. The dissertation can be accessed from: - The library of Graduate University of Science and Technology - The National Library of Viet Nam 1 INTRODUCTION 1. The necessity of the thesis project Seaweed is a marine resource with very high direct and indirect use values. So most of the countries with the sea are very interested in this resource. In Viet Nam, seaweed farming is one of a new industry (replacing traditional shrimp farming which is in crisis in profit value and pond pollution). Seaweed is a potential object in the construction and socio-economic development, contributing to hunger eradication and poverty reduction for many coastal farming households. In coastal areas and islands of our country, about 800 species of seaweed have been discovered at present. In the coastal areas and islands of our country, about 800 species of seaweed have been discovered, in Phu Yen, there have been some studies on seaweed, in studies officially published for Phu province. Yen has 34 species including 6 species of cyanobacteria (Cyanophytes), 8 species of Chlorophytes, 9 species Phaeophytes and 11 species of Rhodophytes. While neighboring provinces in the Central and South Central regions show, seaweed species diversity is quite high such as Quang Ngai with 190 species, Binh Dinh 78 species, Khanh Hoa 516 species, Ninh Thuan 121 species, Binh Thuan 210. species. Therefore, the question raised in this thesis is how many species of seaweed, distribution characteristics of the species, and reserves of some species of seaweed that are valuable for food, medicine, ... will it be recorded in coastal waters of Phu Yen province? To be able to answer the above question, the thesis topic: Studies on biodiversity and economic potential of seaweeds in Phu Yen province is addressed with the following objectives and contents: 2. Objectives of dissertation Long-term objective: - Contribute to the study of the seaweed identification in Viet Nam Immediate objective - Identification of the seaweed species composition and its distribution characteristics - Evaluation of economic potential seaweed species to establish and manage its exploitation and conservation areas in Phu Yen province. 3. The main contents of dissertation To achieve the above objectives, the research contents have been carried out including:  Research on species composition and distribution characteristics of seaweeds.  Identify seaweed species with economic potential and analyze chemical composition of some economic seaweed species.  Mapping of spatial distribution and estimating biomass of some economic seaweed species in Phu Yen province. 2 Chapter 1. AN OVERVIEW 1.1. Studies on biodiversity and economic potential of seaweed in the world Studying the biodiversity of seaweeds as well as other marine plants had been promoted since the systematics of kingdoms was proposed by Carl Linnaeus. Seaweed taxonomy and its classification were complemented and contributed by many scientists during the 17th to 19th centuries. 1.1.1. Systematics Up to now, the world had discovered about 12,000 seaweed species arranged in 4 sections: > 7,000 species for Rhodophytes; > 2,000 species for Ochrophytes; about 1,500 species for Chlorophytes, and about 1,500 species for Cyanophytes (Cyanobacteriophytes). 1.1.2. Seaweed cultivation The main cultured seaweed species belong to about 30 genera Agardhiella, Eucheuma, Gelidium, Gigartina, Gracilaria, Hydropuntia, Hypnea, Kappaphycus, Merwastotheca, Porphyra (red algae - rhodophytes); Saccharina, Laminaria, Undaria, Cladosiphon (brown algae - ochrophytes) and Monostroma, Ulva, Caulerpa (green algae - chlorophyyes). Species of the genera Agardhiella, Gelidium, Gigartina, Porphyra, Saccharina, Laminaria, Undaria, Monostroma, and Ulva were commonly cultivated in temperate waters, while species belonging to the genera Eucheuma, Gracilaria, Hydropuntia, Hypnea, Kappaphycus, Cladosiphon, Caulerpa cultivated in tropical and subtropical regions. 1.1.3. Seaweed uses Seaweed has long been used in many fields: as raw materials for medicine production, extraction of some types of glue (agar, alginate, carrageenan), gas production, fertilizer, environment treatment, make food as a form of green food for people, and used as medicine. 1.2. Biodiversity and economic potential seaweeds in Viet Nam. 1.2.1. Biod ...