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SELECTION, WITH MINIMAL BIAS, OF AN EXPERIMENTAL CONTROL FROM NATURAL WETLAND ENVIRONMENTS
Citation:
Tiedman, R. SELECTION, WITH MINIMAL BIAS, OF AN EXPERIMENTAL CONTROL FROM NATURAL WETLAND ENVIRONMENTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/9-89/075.
Description:
This report is of the National Network for Environmental Management studies conducted under the auspices of the Office of Cooperative Environmental Management--U.S. Environmental Protection Agency. The goal of wetland restoration and creation projects is to replicate the native wetland vegetation. The objective evaluation of wetland revegetation, as well as experiments designed to assess the ability of various wetland revegetation methods to replicate the native community, require a representative control site to distinguish between natural variability and that attributable to a treatment. The bias of the investigator often plagues what is intended to be a subjective selection of a control site. This study is designed to census vegetation species composition of 6 candidate control sites and to determine if any one may be randomly selected from the group and considered representative of the native community. This study tests the following hypotheses: 1. Intentional revegetation as compared to natural colonization will establish a community of vegetation that more closely resembles a native wetland community. 2. Intentional revegetation will establish a community of vegetation more rapidly than natural colonization.