Unit 7

Biophysical Impact Assessment and Cumulative Environmental Effects

In this unit, we examine the assessment of biophysical impacts in greater detail, with particular emphasis on the methodological shortcomings and the challenges faced in the use of ecological science. We also examine cumulative effects and the attempts to incorporate them into environmental assessment. We consider definitions and examples, and discuss their implications for both Canadian and global environmental issues.

Objectives

After completing this unit, you should be able to

1. summarize the key requirements for effective biophysical assessment, give examples of weaknesses in the practice of biophysical impact assessment, and explain how these shortcomings may be overcome.
2. discuss the role and limitations of scientific enquiry in the prediction of biophysical impacts.
3. define and give examples of cumulative effects, and discuss their role in global environmental change.
4. explain the importance of cumulative effects assessment, identify obstacles to its implementation, and suggest some approaches and methodologies to address these difficulties.