4.7 Article Proceedings Paper

Ocean acidification increases larval swimming speed and has limited effects on spawning and settlement of a robust fouling bryozoan, Bugula neritina

期刊

MARINE POLLUTION BULLETIN
卷 124, 期 2, 页码 903-910

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.02.057

关键词

Bryozoan; Lecithotrophic larvae; Video motion analysis; pH; Global change

资金

  1. PGSO, HKUST
  2. VPRG, HKUST
  3. Research Grant Council [26102515]
  4. Croucher Foundation, Hong Kong

向作者/读者索取更多资源

Few studies to date have investigated the effects of ocean acidification on non-reef forming marine invertebrates with non-feeding larvae. Here, we exposed adults of the bryozoan Bugula neritina and their larvae to lowered pH. We monitored spawning, larval swimming, settlement, and post-settlement individual sizes at two pHs (7.9 vs. 7.6) and settlement dynamics alone over a broader pH range (8.0 down to 6.5). Our results show that spawning was not affected by adult exposure (48 hat pH 7.6), larvae swam 32% faster and the newly-settled individuals grew significantly larger (5%) at pH 7.6 than in the control. Although larvae required more time to settle when pH was lowered, reduced pH was not lethal, even down to pH 6.5. Overall, this fouling species appeared to be robust to acidification, and yet, indirect effects such as prolonging the pelagic larval duration could increase predation risk, and might negatively impact population dynamics. (C) 2017 Elsevier Ltd. All rights reserved.

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