Seabird Population Trends and Causes of Change: 1986-2015
Here we present the latest analysed trends in population
numbers and breeding success, productivity, survival and diet
of breeding seabirds, from the Seabird
Monitoring Programme (SMP), along with interpretive text
on the likely causes of change based on the most recent
It replaces and builds upon the now discontinued annual
publication Seabird numbers and breeding success in Britain and
Ireland. Like it, this online report will be updated
Trend information is presented at the UK level and
separately for Scotland, Wales, England, Northern Ireland, Republic
of Ireland, all-Ireland, Channel Islands and Isle of Man.
Interpretation of trends and reasons for change are given largely
at the UK level, unless there is country-specific evidence.
A download of data points presented in the graphs of abundance
and productivity under species accounts is available on request.
The table below contains links to the species accounts and
provides at-a-glance UK population trends (as percentage of change
in breeding numbers) from complete censuses undertaken in
1969-70 (Operation Seafarer), 1985-88 (Seabird Colony
Register, hereafter SCR), and 1998-2002 (Seabird 2000). Change
from 1998-2002 to 2015 (i.e. over the period since the last
national census) is estimated from trends derived from the SMP
sample of colonies; this analysis is only available for
species with sufficient data to accurately
View the methods
of analysis of breeding abundance and productivity data
presented in the species accounts.
This report should be cited as: JNCC. 2016. Seabird Population
Trends and Causes of Change: 1986-2015 Report (http://jncc.defra.gov.uk/page-3201).
Joint Nature Conservation Committee. Updated September
PLEASE NOTE: Where sufficient
data are available, confidence intervals which show the variability
of species’ breeding abundance trends can be found under the
‘Annual abundance and productivity by geographical area’
sections within each species chapter.
* change between censuses in 1984-85 and 2004-05.
** change between census in 2003-04 and colonies surveyed
in 2013-14 and 2015.
*** change between censuses in 1982-91 and 1998-2002