2008 Mineur et al. UK west coast records for Bonnemaisonia hamifera

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Marine Environmental Data & Information Network
Last updated:
01 February 2023
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Summary

It has traditionally been considered that areas with high natural species richness are likely to be more resistant to non-indigenous species than those with lower numbers of species. However, this theory has been the subject of a debate ove rthe last decade, since some studies have shown the opposite trend. In the present study, a macroalgal survey was carried out at 24 localities in Northern Ireland and southern England, using a quadrat approach in the lower littoral. The two opposing hypotheses were tested (negative versus positive relationship between native and non-indigenous species richness) in this marine environment. The effect of the presence of ‘impacts’, potential sources of disturbance and species introduction(e.g. marina, harbour or aquaculture), was also tested. A positive relationship was found between the number of non-indigenous species and the native species richness at the three different scales tested (quadrats, sites and localities). At no scale did a richer native assemblage appear to restrict the establishment of introduced species. The analyses revealed greater species richness and different community composition, as well as more non-indigenous species, in southern England relative to Northern Ireland. The presence of the considered impacts had an effect on the community composition and species richness in southern England but not in Northern Ireland. Such impacts had no effect on the non-indigenous species richness in either area.

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Additional information

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Added to data.gov.uk
2021-05-11
Access contraints
DASSH terms and conditions apply
Harvest GUID
973e1c8c-0634-41d8-84de-95330156dcf5
Extent
Latitude: 50.6868° to 49.8441°
Longitude: -6.1701° to -3.0060°
Spatial reference system
urn:ogc:def:crs:EPSG::4326
Dataset reference date
2008-03-17 (publication)
Frequency of update
notPlanned
Responsible party
Queen's University Belfast School of Biological Sciences (originator); Data Archive for Seabed Species and Habitats (DASSH) (custodian)
ISO 19139 resource type
dataset
Metadata language
eng
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CC BY 4.0