Access

You are not currently logged in.

Access JSTOR through your library or other institution:

login

Log in through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Journal Article

Designs for Detecting Trend from Repeated Surveys of Ecological Resources

N. Scott Urquhart and Thomas M. Kincaid
Journal of Agricultural, Biological, and Environmental Statistics
Vol. 4, No. 4, Sampling over Time (Dec., 1999), pp. 404-414
Stable URL: http://www.jstor.org/stable/1400498
Page Count: 11
  • Read Online (Free)
  • Download ($14.00)
  • Subscribe ($19.50)
  • Add to My Lists
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Designs for Detecting Trend from Repeated Surveys of Ecological Resources
Preview not available

Abstract

We report investigations on trend detection capability (power for linear trend) from repeated surveys of the same regional resource population. The temporal sampling plans range from periodic revisits using panel designs to independent surveys at each point in time; the latter have only random revisits. We view the resource of interest as a finite population but characterize several features of the situation with components of variance. The results show how components of variance for site, year, and residual and sampling fraction impact power to detect a specific trend. The panel designs turn out to be far superior to independent surveys for detecting trend and have other desirable features.

Page Thumbnails

  • Thumbnail: Page 
404
    404
  • Thumbnail: Page 
405
    405
  • Thumbnail: Page 
406
    406
  • Thumbnail: Page 
407
    407
  • Thumbnail: Page 
408
    408
  • Thumbnail: Page 
409
    409
  • Thumbnail: Page 
410
    410
  • Thumbnail: Page 
411
    411
  • Thumbnail: Page 
412
    412
  • Thumbnail: Page 
413
    413
  • Thumbnail: Page 
414
    414
Part of Sustainability