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Power to detect trend in short-term time series of bird abundance

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Power to detect trend in short-term time series of bird abundance; 2007; Article; Journal; Condor; Thogmartin, W. E.; Gray, B. R.; Gallagher, M.; Young, N.; Rohweder, J. J.; Knutson, M. G.

Summary

Avian point counts for population monitoring are often collected over a short timespan (e.g., 3-5 years). We examined whether power was adequate (power ???0.80) in short-duration studies to warrant the calculation of trend estimates. We modeled power to detect trends in abundance indices of eight bird species occurring across three floodplain habitats (wet prairie, early successional forest, and mature forest) as a function of trend magnitude, sample size, and species-specific sampling and among-year variance components. Point counts (5 min) were collected from 365 locations distributed among 10 study sites along the lower Missouri River; counts were collected over the period 2002 to 2004. For all study species, power appeared adequate [...]

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  • Upper Midwest Environmental Sciences Center (UMESC)

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Harvested on Mon Jul 21 13:38:46 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown 70029855
local-pk unknown 70029855
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.1650/0010-5422(2007)109[943:PTDTIS]2.0.CO;2
series unknown Condor

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journalCondor
parts
typevolume
value109
typeissue
value4
languageEnglish
citationTypeArticle

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