SAMBR - Trends in kittiwake colonies 2001-2010

Trends in kittiwake colonies 2001-2010, based on linear regression with year as the explanatory variable. Slope of the regression is red = negative trend, blue = positive trend; shaded circle = significant trend (at p<0.05), open circle = non-significant trend. Non-significant deviation from zero could imply a stable population, but in some cases was due to low sample size and low power. Provided with permission from Descamps et al. (in prep).



STATE OF THE ARCTIC MARINE BIODIVERSITY REPORT - <a href=" https://arcticbiodiversity.is/findings/seabirds" target="_blank">Chapter 3</a> - Page 135 - Figure 3.5.3



This figure is compiled from data from researchers working throughout circumpolar regions, primarily members of the Circumpolar Seabird Group, an EN of CAFF/seabirds. Dr. Sebastien Decamps conducted the analysis and produced the original figure; the full results will be available in an article in prep titled: “Descamps et al. in prep. Circumpolar dynamics of black-legged kittiwakes track large-scale environmental shifts and oceans' warming rate.” [expected submission spring 2016].



Colony population trends were analyzed using a linear regression with the year as explanatory variable. Based on slope of the regression (which cannot be exactly 0) colonies are either Declining (Slope of the regression <0) or Increasing (Slope of the regression >0). (Colonies may have had a negative but not significant slope, and could be stable but for some others, the slope is not significant due to small sample size / low power; thus we cannot say that all colonies with a non- significant slope are stable. The threshold was put at 5% to assess the significance of the trend.

Simple

Date (Publication)
2017-05
Edition

http://geo.abds.is:8081/demodem/editioin

Credit

Sebastien Descamps,

Norwegian Polar Institute

Fram Centre

Postbox 6606 Langnes

NO-9296 Tromsø

and members of Circumpolar Seabird Group
Status
Completed
Point of contact
Organisation name Individual name Electronic mail address Role

U.S. Fish & Wildlife Service

Kathy Kuletz

kathy_kuletz@fws.gov

Author

Conservation of Arctic Flora and Fauna (CAFF)

Tom Barry

abds@caff.is

Point of contact
Maintenance and update frequency
Unknown
Theme

  • CHAPTER3

  • Marine

  • Circumpolar Trends

  • black-legged kittiwake
Place

  • Seabirds
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Spatial representation type
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Language
English
Character set
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Topic category
  • Oceans
Begin date
2001-05-01
End date
2010-09-01
N
S
E
W
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3abd7add-152d-44bf-86f4-41a010cc7480 XML
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Date stamp
2026-02-19T17:46:57.003400563Z
Metadata standard name

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Metadata standard version

1.0
Metadata author
Organisation name Individual name Electronic mail address Role

Conservation of Arctic Flora and Fauna (CAFF)

Hólmgrímur Helgason

hoddi@caff.is

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Keywords

CHAPTER3 Circumpolar Trends Marine black-legged kittiwake


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