Zhang Jianheng, Kim Jang Kyun, Yarish Charles, He Peimin
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China; Department of Ecology and Evolutionary Biology, University of Connecticut, 1 University Place, Stamford, CT 06901, USA.
Department of Marine Science, School of Natural Sciences, Incheon National University, Incheon 22012, Republic of Korea; Department of Marine Sciences, University of Connecticut, 1 University Place, Stamford, CT 06901, USA.
Mar Pollut Bull. 2016 Mar 15;104(1-2):101-6. doi: 10.1016/j.marpolbul.2016.01.056. Epub 2016 Feb 5.
Since 2007, Ulva macroalgal blooms have occurred along the coastal areas of the Yellow Sea, China. These blooms are dominated by fragments of Ulva prolifera in the early stages of development. The objectives of this study were to identify the primary mode of asexual reproduction for U. prolifera and to evaluate the contribution of these thalli fragments to the formation of blooms. Four different growth and reproductive strategies of U. prolifera segments were found including: 1) tubular diameter becoming larger; 2) formation of new branches; 3) release of zoids; and 4) polarized growth. This is the first report showing the development of numerous blade-lets from a single segment, which is remarkably different from previous studies on other Ulva species. The results in the present study provide critical information to understand how this species is able to support its explosive growth during a bloom.
自2007年以来，中国黄海沿岸出现了石莼大型海藻爆发。这些爆发在发育早期以浒苔碎片为主。本研究的目的是确定浒苔无性繁殖的主要方式，并评估这些藻体碎片对藻华形成的贡献。发现浒苔片段有四种不同的生长和繁殖策略，包括：1）管状直径变大；2）形成新分支；3）释放游动孢子；4）极性生长。这是首次报道单个片段发育出大量小叶，这与之前对其他石莼物种的研究有显著不同。本研究结果为理解该物种在藻华期间如何实现爆发式生长提供了关键信息。
