Comprobación de hipótesis sobre las extinciones de aves en río palenque, ecuador mediante listas informales de especies

Translated title of the contribution: Testing hypotheses of bird extinctions at rio palenque, ecuador, with informal species lists

David L. Pearson, Corey Devin Anderson, Brian R. Mitchell, Michael S. Rosenberg, Ronald Navarrete, Paul Coopmans

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Informally gathered species lists are a potential source of data for conservation biology, but most remain unused because of questions of reliability and statistical issues. We applied two alternative analytical methods (contingency tests and occupancy modeling) to a 35-year data set (1973-2007) to test hypotheses about local bird extinction. We compiled data from bird lists collected by expert amateurs and professional scientists in a 2-km2 fragment of lowland tropical forest in coastal Ecuador. We tested the effects of the following on local extinction: Trophic level, sociality, foraging specialization, light tolerance, geographical range area, and biogeographic source. First we assessed extinction on the basis of the number of years in which a species was not detected on the site and used contingency tests with each factor to compare the frequency of expected and observed extinction events among different species categories. Then we defined four multiyear periods that reflected different stages of deforestation and isolation of the study site and used occupancy modeling to test extinction hypotheses singly and in combination. Both types of analyses supported the biogeographic source hypothesis and the species-range hypothesis as causes of extinction; however, occupancy modeling indicated the model incorporating all factors except foraging specialization best fit the data.

Original languageSpanish
Pages (from-to)500-510
Number of pages11
JournalConservation Biology
Volume24
Issue number2
DOIs
StatePublished - Apr 2010

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hypothesis testing
Ecuador
extinction
bird
birds
testing
modeling
foraging
local extinction
trophic level
tropical forest
deforestation
lowland forests
analytical method
tropical forests
tolerance
analytical methods
test
Biological Sciences

Keywords

  • Bird community ecology
  • Detectability
  • Ecoinformatics
  • Expert amateurs
  • Extinction
  • Occupancy modeling
  • Professional biologists
  • Species monitoring
  • Tropical forest

ASJC Scopus subject areas

  • Nature and Landscape Conservation
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Comprobación de hipótesis sobre las extinciones de aves en río palenque, ecuador mediante listas informales de especies. / Pearson, David L.; Anderson, Corey Devin; Mitchell, Brian R.; Rosenberg, Michael S.; Navarrete, Ronald; Coopmans, Paul.

In: Conservation Biology, Vol. 24, No. 2, 04.2010, p. 500-510.

Research output: Contribution to journalArticle

Pearson, David L. ; Anderson, Corey Devin ; Mitchell, Brian R. ; Rosenberg, Michael S. ; Navarrete, Ronald ; Coopmans, Paul. / Comprobación de hipótesis sobre las extinciones de aves en río palenque, ecuador mediante listas informales de especies. In: Conservation Biology. 2010 ; Vol. 24, No. 2. pp. 500-510.
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