Utilização da análise de poder em estudos de avaliação de impactos ambientais

Abstract

Hypothesis testing are commonly used in environmental impact monitoring studies. They aim to increase the reliability of statistics analysis that have been used as additional tools to detect the occurrence of anthropic impacts to the environment, therefore preventing it. Conventionally those studies aimto identify possible environmental impacts, however traditionally focus on minimize impact misdetection, 7 avoidind additional costs to the studies and consequently to the entrepreneur. However, its misuse might neglects some natural impacts leading to environmental damage. Power analysis, object of this review, is a still underutilized tool whose purpose is analyze the ability to avoid such problems based on the sample design and statistical test chosen. There were analyzed 34 environmental monitoring studies that perform any type of power analysis. The aquatic science is the one the has incorporated more amounts of analysis of power in their studies. Fish and aquatic invertebrates were the most used groups in these researches. The type of Power analysis mostly applied was a post hoc, found in 28% of the studies. The software mostly used was R, followed by GPower, SYSTAT, PRIMER and SAS and the tests mostly employed were ANOVA and T Test. It was observed that the analysis of power still remains an incipient issue in the environmental sciences, and should be more disseminated in order to obtain more consistent conclusions and better support decision making by environmental managers.