Document Type

Journal Article

Department/Unit

Department of Biology

Title

Hypoxia induces abnormal larval development and affects biofilm–larval interaction in the serpulid polychaete Hydroides elegans

Language

English

Abstract

Hydroides elegans, a worldwide fouling polychaete, can spawn throughout the year, but its recruitment drops during summer when hypoxia prevails. Here, the influence of hypoxia on larval development and settlement of H. elegans was investigated. Results showed that larval development was compromised at 1mg O2 l-1 with a lower proportion of competent larvae and a higher proportion of malformed larvae, probably due to reduction in clearance rate. Regarding larval settlement, although most of the larvae were reluctant to settle at 1mg O2 l-1, regardless of the biofilm nature, they settled quickly within 24h in response to the resumption of dissolved oxygen. Furthermore, only about 5% of the larvae settled on the biofilms developed under hypoxia, regardless of dissolved oxygen levels of the seawater. The delayed larval development and potential alteration of biofilm nature owing to hypoxia explained why the recruitment of H. elegans declines during summer. © 2013 Elsevier Ltd.

Keywords

Biofilm, Hydroides elegans, Hypoxia, Larval development, Larval settlement

Publication Date

2013

Source Publication Title

Marine Pollution Bulletin

Volume

76

Issue

2-1

Start Page

291

End Page

297

Publisher

Elsevier

DOI

10.1016/j.marpolbul.2013.08.022

ISSN (print)

0025326X

ISSN (electronic)

18793363

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