Journal
MARINE POLLUTION BULLETIN
Volume 130, Issue -, Pages 223-228Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2018.03.036
Keywords
Germination rate; Macroalgal blooms; Sexual reproduction; Ulva prolifera; Vegetative growth
Funding
- China Scholarship Council (CSC) [201408310112]
- National Natural Science Foundation of China [41576163]
- Shanghai Sailing Program [17YF1407900]
- Ocean Public Welfare Scientific Research Project, China [201205010]
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Green algal blooms have occurred in the Yellow Sea for 11 consecutive years since 2007. A seed bank comprising micro-propagules including gametes, meiospores, and zygotes, played an important role in the rapid formation of a green tide. In the present study, germination differences among zygotes, meiospores, and gametes were examined. The growth ability and maturation period of alternating generations of sexual Ulva prolifera strains were also assessed. The zygote and meiospore germination rate was 91.67% and 80.29%, respectively, approximately three times greater than that of gametes (30%). In addition, the highest daily growth rate of sporophytes and gametophytes was 266.7% and 288.1%, respectively, and the maturation period of sporophytes and gametophytes was 35.7 and 31.3 days, respectively. These results indicate that sexual reproduction and vegetative growth are mainly responsible for the rapid expansion of macroalgal blooms in the Yellow Sea.
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