Report 388
Recommendations for the selection of and boundary options for an SPA in Liverpool Bay
(2006)
Webb, A., McSorley, C.A., Dean, B.J., Reid, J.B.
The results indicated that Liverpool Bay hosted populations of red-throated divers Gavia stellata and common scoter Melanitta nigra in numbers that exceeded thresholds that would qualify the site for SPA status. This report follows from Webb et al. (2004) and aims to identify options for boundaries for any possible SPA in Liverpool Bay; it must be read in conjunction with Webb et al. (2004), not least because of frequent reference to the latter herein.
Summary
Webb et al. (2004) reported analyses of aerial survey
data aimed at identifying likely numbers and distributions of
waterbirds using Liverpool Bay in the non-breeding season.
The results indicated that Liverpool Bay hosted populations of
red-throated divers Gavia stellata and common scoter
Melanitta nigra in numbers that exceeded thresholds that
would qualify the site for SPA status. This report follows
from Webb et al. (2004) and aims to identify options for
boundaries for any possible SPA in Liverpool Bay; it must be read
in conjunction with Webb et al. (2004), not least because
of frequent reference to the latter herein.
In assessing Liverpool Bay for
possible SPA qualification, Webb et al. (2004) recommended
that it be considered a single site because aggregations of both
red-throated divers and common scoter were relatively continuously
distributed over the site, occurring at distances less than 10 km
apart. If this recommendation is accepted, population
assessments used in Stage 1 and 2 judgements (below) should
therefore apply to Liverpool Bay as a whole rather than to any
sub-areas or disjunct aggregations of birds.
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17 pages, softback, some maps
ISSN 0963-8091
Please cite as: Webb, A., McSorley, C.A., Dean, B.J., Reid, J.B., (2006), Recommendations for the selection of and boundary options for an SPA in Liverpool Bay, JNCC Report 388, 17 pages, softback, some maps, ISSN 0963-8091