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Fluctuations and trends in numbers of staging waterbirds in South Sweden 1973-2013.

Nilsson, Leif LU (2014) In Ornis Svecica 24. p.129-146
Abstract
Regular September counts of staging waterbirds have
been undertaken annually in south Sweden since 1973
as a complement to the International Midwinter Counts
undertaken in January each year since 1967. The September
counts aim to cover the population development of
staging waterbirds, especially relating to species that are
not wintering in the country. Between 150 and about 200
sites have been included in the calculation of the September
indices, using the TRIM method. September indices
were calculated for 18 species. The trends over the entire
41-year period were significantly increasing for all but
five species (Anas platyrhynchos, Somateria mollissima
and Mergus serrator decreasing,... (More)
Regular September counts of staging waterbirds have
been undertaken annually in south Sweden since 1973
as a complement to the International Midwinter Counts
undertaken in January each year since 1967. The September
counts aim to cover the population development of
staging waterbirds, especially relating to species that are
not wintering in the country. Between 150 and about 200
sites have been included in the calculation of the September
indices, using the TRIM method. September indices
were calculated for 18 species. The trends over the entire
41-year period were significantly increasing for all but
five species (Anas platyrhynchos, Somateria mollissima
and Mergus serrator decreasing, whereas Podiceps cristatus
and Fulica atra did not show any clear long-term
trend). The September indices were in good agreement
with the International Midwinter Counts and the winter
counts of the Swedish Bird Survey, but much less well
with migration counts at Falsterbo and breeding season
counts of the Swedish Bird Survey. For the last ten years
of the series, six species showed a significantly increasing
trend, whereas four species decreased. (Less)
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Contribution to journal
publication status
published
subject
in
Ornis Svecica
volume
24
pages
129 - 146
publisher
Sveriges Ornitologiska Förening
ISSN
1102-6812
language
English
LU publication?
yes
id
0ab00556-e129-4eb3-b8a9-5ee117e8b9e0
alternative location
http://birdlife.se//1020.0.1.0/552/download_30359.php
date added to LUP
2016-12-12 14:07:04
date last changed
2017-02-10 11:26:06
@article{0ab00556-e129-4eb3-b8a9-5ee117e8b9e0,
  abstract     = {Regular September counts of staging waterbirds have<br/>been undertaken annually in south Sweden since 1973<br/>as a complement to the International Midwinter Counts<br/>undertaken in January each year since 1967. The September<br/>counts aim to cover the population development of<br/>staging waterbirds, especially relating to species that are<br/>not wintering in the country. Between 150 and about 200<br/>sites have been included in the calculation of the September<br/>indices, using the TRIM method. September indices<br/>were calculated for 18 species. The trends over the entire<br/>41-year period were significantly increasing for all but<br/>five species (Anas platyrhynchos, Somateria mollissima<br/>and Mergus serrator decreasing, whereas Podiceps cristatus<br/>and Fulica atra did not show any clear long-term<br/>trend). The September indices were in good agreement<br/>with the International Midwinter Counts and the winter<br/>counts of the Swedish Bird Survey, but much less well<br/>with migration counts at Falsterbo and breeding season<br/>counts of the Swedish Bird Survey. For the last ten years<br/>of the series, six species showed a significantly increasing<br/>trend, whereas four species decreased.},
  author       = {Nilsson, Leif},
  issn         = {1102-6812},
  language     = {eng},
  pages        = {129--146},
  publisher    = {Sveriges Ornitologiska Förening},
  series       = {Ornis Svecica},
  title        = {Fluctuations and trends in numbers of staging waterbirds in South Sweden 1973-2013.},
  volume       = {24},
  year         = {2014},
}