1. Ecosystem Changes
-Changes in ecosystems are usually predictable patterns of climate, seasonal reproductive cycles, population cycles, and migrations.
-Unexpected disturbances caused by human intervention or the introduction of a new species can destabilize the balance in an ecosystem.

2. Ecosystem Changes
-Analyzing changes in an ecosystem can require complex methods and tech­niques because variation is not necessarily simple and may be caused by many factors
-Rates and patterns of change, including trends,
cycles, and irregularities, are important and useful indicators of change that can provide valuable information
-Often it is important to analyze change over time, a process called longitudinal analysis

3. Invasive Species Profile – Garlic Mustard
After reading the profile of the Garlic Mustard, answer the following questions:
1. Why is the garlic mustard considered an invasive species?
2. Given enough time, how might an ecosystem change once the garlic mustard is introduced?
3. What can be done to control its spread?