TrendPowerTool: A lookup tool for estimating the statistical power of a monitoring program to detect population trends

Emily L. Weiser, Jay E. Diffendorfer, Laura Lopez-Hoffman, Darius Semmens, Wayne E. Thogmartin

Research output: Contribution to journalArticlepeer-review

Abstract

A simulation-based power analysis can be used to estimate the sample sizes needed for a successful monitoring program, but requires technical expertise and sometimes extensive computing resources. We developed a web-based lookup app, called TrendPowerTool (https://www.usgs.gov/apps/TrendPowerTool/), to provide guidance for ecological monitoring programs when resources are not available for a simulation-based power analysis. TrendPowerTool is implemented through the shiny package in R, but is accessible through a webpage without the need for users to install any software. By drawing on results of 1.4 million scenarios that we simulated on a supercomputer, TrendPowerTool quickly and easily provides an estimate of the statistical power to detect a population trend of a particular magnitude with a planned monitoring program, based on user-specified parameters for the monitoring design and population of interest. TrendPowerTool provides a user-friendly interface that retrieves results instantaneously, facilitating the important step of conducting a power analysis when designing monitoring programs.

Original languageEnglish (US)
Article numbere445
JournalConservation Science and Practice
Volume3
Issue number7
DOIs
StatePublished - Jul 2021

ASJC Scopus subject areas

  • Nature and Landscape Conservation
  • Global and Planetary Change
  • Ecology
  • Environmental Science (miscellaneous)

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