Wj. Streever et Km. Portier, A COMPUTER-PROGRAM TO ASSIST WITH SAMPLING DESIGN IN THE COMPARISON OF NATURAL AND CONSTRUCTED WETLANDS, Wetlands, 14(3), 1994, pp. 199-205
Statistically sound comparisons of natural and constructed wetlands ar
e complicated by variability between and within wetlands. This paper d
emonstrates the use of a SAS(R) program that estimates sampling effort
and allocates that effort among number of wetlands, number of station
s within wetlands, and number of samples to be collected at each stati
on. Estimates are based upon variances known from pre-existing data, d
esired statistical power and critical effect, and project budget. The
program is used to generate a sampling design for comparison of chiron
omid populations of natural and constructed freshwater herbaceous wetl
ands in central Florida.