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Human impacts on the rates of recent, present, and future bird extinctions.

Publication ,  Journal Article
Pimm, S; Raven, P; Peterson, A; Sekercioglu, CH; Ehrlich, PR
Published in: Proceedings of the National Academy of Sciences of the United States of America
July 2006

Unqualified, the statement that approximately 1.3% of the approximately 10,000 presently known bird species have become extinct since A.D. 1500 yields an estimate of approximately 26 extinctions per million species per year (or 26 E/MSY). This is higher than the benchmark rate of approximately 1 E/MSY before human impacts, but is a serious underestimate. First, Polynesian expansion across the Pacific also exterminated many species well before European explorations. Second, three factors increase the rate: (i) The number of known extinctions before 1800 is increasing as taxonomists describe new species from skeletal remains. (ii) One should calculate extinction rates over the years since taxonomists described the species. Most bird species were described only after 1850. (iii) Some species are probably extinct; there is reluctance to declare them so prematurely. Thus corrected, recent extinction rates are approximately 100 E/MSY. In the last decades, the rate is <50 E/MSY, but would be 150 E/MSY were it not for conservation efforts. Increasing numbers of extinctions are on continents, whereas previously most were on islands. We predict a 21st century rate of approximately 1,000 E/MSY. Extinction threatens 12% of bird species; another 12% have small geographical ranges and live where human actions rapidly destroy their habitats. If present forest losses continue, extinction rates will reach 1,500 E/MSY by the century's end. Invasive species, expanding human technologies, and global change will harm additional species. Birds are poor models for predicting extinction rates for other taxa. Human actions threaten higher fractions of other well known taxa than they do birds. Moreover, people take special efforts to protect birds.

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Published In

Proceedings of the National Academy of Sciences of the United States of America

DOI

EISSN

1091-6490

ISSN

0027-8424

Publication Date

July 2006

Volume

103

Issue

29

Start / End Page

10941 / 10946

Related Subject Headings

  • Time Factors
  • Population
  • Humans
  • Europe
  • Birds
  • Biodiversity
  • Animals
 

Citation

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Pimm, S., Raven, P., Peterson, A., Sekercioglu, C. H., & Ehrlich, P. R. (2006). Human impacts on the rates of recent, present, and future bird extinctions. Proceedings of the National Academy of Sciences of the United States of America, 103(29), 10941–10946. https://doi.org/10.1073/pnas.0604181103
Pimm, Stuart, Peter Raven, Alan Peterson, Cagan H. Sekercioglu, and Paul R. Ehrlich. “Human impacts on the rates of recent, present, and future bird extinctions.Proceedings of the National Academy of Sciences of the United States of America 103, no. 29 (July 2006): 10941–46. https://doi.org/10.1073/pnas.0604181103.
Pimm S, Raven P, Peterson A, Sekercioglu CH, Ehrlich PR. Human impacts on the rates of recent, present, and future bird extinctions. Proceedings of the National Academy of Sciences of the United States of America. 2006 Jul;103(29):10941–6.
Pimm, Stuart, et al. “Human impacts on the rates of recent, present, and future bird extinctions.Proceedings of the National Academy of Sciences of the United States of America, vol. 103, no. 29, July 2006, pp. 10941–46. Epmc, doi:10.1073/pnas.0604181103.
Pimm S, Raven P, Peterson A, Sekercioglu CH, Ehrlich PR. Human impacts on the rates of recent, present, and future bird extinctions. Proceedings of the National Academy of Sciences of the United States of America. 2006 Jul;103(29):10941–10946.
Journal cover image

Published In

Proceedings of the National Academy of Sciences of the United States of America

DOI

EISSN

1091-6490

ISSN

0027-8424

Publication Date

July 2006

Volume

103

Issue

29

Start / End Page

10941 / 10946

Related Subject Headings

  • Time Factors
  • Population
  • Humans
  • Europe
  • Birds
  • Biodiversity
  • Animals