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Mar Pollut Bull. 2016 Mar 15;104(1-2):101-6. doi: 10.1016/j.marpolbul.2016.01.056. Epub 2016 Feb 5.

The expansion of Ulva prolifera O.F. Müller macroalgal blooms in the Yellow Sea, PR China, through asexual reproduction.

Author information

1
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.
2
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.
3
Department of Ecology and Evolutionary Biology, University of Connecticut, 1 University Place, Stamford, CT 06901, USA. Electronic address: charles.yarish@uconn.edu.
4
College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China. Electronic address: pmhe@shou.edu.cn.

Abstract

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.

KEYWORDS:

Eutrophication; Fragmentation; Macroalgae blooms; Polarized growth; Ulva prolifera; Yellow Sea

PMID:
26856643
DOI:
10.1016/j.marpolbul.2016.01.056
[Indexed for MEDLINE]

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