Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Improving population estimates of Swedish birds using the Breeding Bird Survey fixed routes and correction factors from Finnish line transect surveys

Svensson, Sören LU (2016) In Ornis Svecica 26(3-4). p.177-190
Abstract

I estimated population size of fifty-nine common birds by using the fixed routes of the Swedish Bird Survey (SBS), which give the number of birds per kilometer. I converted this number to density, birds/km2, using the correction factors for detectability that have been developed for line transects in Finland. I compared the population estimates by this new method with those in a previous account from 2012, in which the estimates of common birds were primarily based on extrapolation of habitat-specific densities from numerous territory mapping plots. There was good agreement for the most abundant species but a clear tendency that the estimates with the new method were higher for many less common ones. As little new density data are being... (More)

I estimated population size of fifty-nine common birds by using the fixed routes of the Swedish Bird Survey (SBS), which give the number of birds per kilometer. I converted this number to density, birds/km2, using the correction factors for detectability that have been developed for line transects in Finland. I compared the population estimates by this new method with those in a previous account from 2012, in which the estimates of common birds were primarily based on extrapolation of habitat-specific densities from numerous territory mapping plots. There was good agreement for the most abundant species but a clear tendency that the estimates with the new method were higher for many less common ones. As little new density data are being collected, the SBS fixed routes are likely to be the prime source of data for future national population estimates. Although the Finnish correction factors can be used to improve the Swedish estimates for suitable species it is advisable to develop factors specifically adapted to the Swedish counts for application to a wider spectrum of species.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ornis Svecica
volume
26
issue
3-4
pages
177 - 190
publisher
Sveriges Ornitologiska Förening
external identifiers
  • scopus:85068158859
  • scopus:85068158859
ISSN
1102-6812
language
English
LU publication?
yes
id
7e9eac27-084e-458f-aee5-39af1b44d969
alternative location
http://birdlife.se/wp-content/uploads/ornis_svecica/cms_20-s1_Vol%2026,%20nr%203-4,%20177-190,%20Svensson,%20popul%20estim.pdf
date added to LUP
2019-05-16 12:45:08
date last changed
2024-01-01 05:04:01
@article{7e9eac27-084e-458f-aee5-39af1b44d969,
  abstract     = {{<p>I estimated population size of fifty-nine common birds by using the fixed routes of the Swedish Bird Survey (SBS), which give the number of birds per kilometer. I converted this number to density, birds/km2, using the correction factors for detectability that have been developed for line transects in Finland. I compared the population estimates by this new method with those in a previous account from 2012, in which the estimates of common birds were primarily based on extrapolation of habitat-specific densities from numerous territory mapping plots. There was good agreement for the most abundant species but a clear tendency that the estimates with the new method were higher for many less common ones. As little new density data are being collected, the SBS fixed routes are likely to be the prime source of data for future national population estimates. Although the Finnish correction factors can be used to improve the Swedish estimates for suitable species it is advisable to develop factors specifically adapted to the Swedish counts for application to a wider spectrum of species.</p>}},
  author       = {{Svensson, Sören}},
  issn         = {{1102-6812}},
  language     = {{eng}},
  number       = {{3-4}},
  pages        = {{177--190}},
  publisher    = {{Sveriges Ornitologiska Förening}},
  series       = {{Ornis Svecica}},
  title        = {{Improving population estimates of Swedish birds using the Breeding Bird Survey fixed routes and correction factors from Finnish line transect surveys}},
  url          = {{http://birdlife.se/wp-content/uploads/ornis_svecica/cms_20-s1_Vol%2026,%20nr%203-4,%20177-190,%20Svensson,%20popul%20estim.pdf}},
  volume       = {{26}},
  year         = {{2016}},
}