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The regional recovery of Nucella lapillus populations from marine pollution, facilitated by man-made structures

Record type: Article

The dogwhelk Nucella lapillus experienced localized extinction in the 1980s and 1990s due to the use of tributyltin (TBT) antifoulants, causing imposex in females. The aim of this study was to establish the extent of the return of the species across the mainland coast of central southern England as TBT use has been progressively restricted, and to quantify the extent of imposex impact on the populations present. We surveyed from Poole to Selsey where isolated populations had become extinct, and the Isle of Wight where some populations had persisted. We found evidence that since TBT restrictions, recolonization and colonization by N. lapillus has been rapid. By 2007–2008, of the eleven surveyed mainland sites, seven were colonized, although indications of reduced imposex impacts were mixed. Distribution had also extended on the Isle of Wight and populations were larger with less imposex impact in sites with long term populations. The lack of continuous suitable habitat blocks and the hydrodynamic complexity of the region, leads us to hypothesize that recovery has been facilitated by man-made structures which may be acting as ‘stepping stones’. Populations that have become established on engineered structures such as sea walls, breakwaters and rock groynes demonstrate accelerated recovery in the region as TBT in the environment has generally declined. Sites with suitable substrates and food sources near to ports were either not recolonized or had small populations with imposex evident. For species with a short pelagic larval stage or with direct development, population connectivity between patches of harder substrata along hydrodynamically complex coastlines may be greater than previously thought.

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Citation

Bray, Simon, McVean, Emily C., Nelson, Andrew, Herbert, Roger J.H., Hawkins, Stephen J. and Hudson, Malcolm D. (2011) The regional recovery of Nucella lapillus populations from marine pollution, facilitated by man-made structures Journal of the Marine Biological Association of the United Kingdom, FirstView, pp. 1-10. (doi:10.1017/S0025315411001317).

More information

e-pub ahead of print date: 23 September 2011
Keywords: imposex, tributyltin, tbt, dogwhelk nucella lapillus, recolonization, sea defences, marine pollution indicator
Organisations: Ocean and Earth Science, Centre for Environmental Science

Identifiers

Local EPrints ID: 204361
URI: http://eprints.soton.ac.uk/id/eprint/204361
ISSN: 0025-3154
PURE UUID: 3e9958c4-9bc4-42a5-b30d-76659672b932

Catalogue record

Date deposited: 28 Nov 2011 09:53
Last modified: 18 Jul 2017 11:06

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Contributors

Author: Simon Bray
Author: Emily C. McVean
Author: Andrew Nelson
Author: Roger J.H. Herbert

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