Statistical Ecology
Stat 555, Fall 2009


 BACI
Assignment #6

1. The effects of a sewer outfall on a kelp forest were examined in California over a ten-year period, five years before the outfall became active and five years after, at both a control and an impact site. Using the data below conduct a BACI analysis: a) using the t-test procedure described in Stewart-Oaten et al. (1986) in class; b) using the ANOVA procedure described in Underwood (1999) in class. Please provide a model for both analyses.

  Kelp percent cover (%)
Time Control Impact
1 58.3 57.3
2 62.7 61.1
3 47.1 45.7
4 56.2 52.3
5 71.0 65.6
6 58.3 40.1
7 62.8 35.5
8 68.1 30.1
9 54.2 36.4
10 58.0 40.2

This assignment is due next Wednesday, Oct.14., in class.