Record Display for the EPA National Library Catalog


Main Title Comparing Sampling Designs for Monitoring Ecological Status and Trends: Impact of Temporal Patterns (Chapter 3).
Author Urquhart, N. S. ; Overton, W. S. ; Birkes, D. S. ;
CORP Author Oregon State Univ., Corvallis.;Corvallis Environmental Research Lab., OR.
Publisher c1993
Year Published 1993
Report Number EPA/600/A-93/196;
Stock Number PB93-222289
Additional Subjects Environmental monitoring ; Biological indicators ; Statistical analysis ; Sampling ; Design criteria ; Environmental surveys ; Ecology ; Environment pollution ; Long term effects ; Reprints ; Status and trends
Library Call Number Additional Info Location Last
NTIS  PB93-222289 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18p
The paper presents a comparison of two classes of sampling designs suggested for long-term environmental monitoring. One class is based on a rotating panel design that prescribes visiting a panel of sites for several consecutive years with partial replacement of sites each year; the other class is based on a serially alternating design which prescribes returning to sampling sites every four years. A random effects linear model is used to investigate and compare the proposed sampling designs because the sites to be visited and the years of visits may manifest substantial random contributions. The class of designs based on the serially alternating design lead to more precise estimates of current status and of trends in the ecological resource when the site components of variance is substantially greater than the year component and/or when the sample sizes are smaller.