BIOE 125Ecosystems of California
A survey of the diversity, structure, and functioning of California's ecosystems through time and the ways they have influenced and responded to human activities and stewardship. Topics include: ecosystem drivers such as climate, soils, and land-use history; human and ecological prehistory; comparative marine, freshwater, and terrestrial ecosystem dynamics; and managed ecosystems such as range, fisheries, and agriculture.
Prerequisite(s): BIOE 20C, and satisfaction of the Entry Level Writing and Composition requirements. Enrollment is restricted to ecology and evolution, marine biology, plant sciences, and biology B.A. majors.
- UCSC students: If you completed the prerequisites but received an error message, email your proof of prerequisite material to eebadvising@ucsc.edu for approval to enroll.
- Visiting Students: If you have completed the prerequisites but receive an error message, email your proof of prerequisite material to the instructor for approval to enroll: Sean Reilly, sreilly@ucsc.edu.
- If you need to take the prerequisite in Session 1, enroll in that course first, then email summer@ucsc.edu for a permission number to enroll in this course.
Find a section and add it to your scheduleLive seat counts, time-conflict checks and the walk from your previous class.
When it runs
Summer 2026Open Summer 2026
| Section | Type | When | Where | Instructor | Seats |
|---|---|---|---|---|---|
| 01 | Lecture | TBA | Online | S. B. Reilly | Open 57/60 |
Who teaches it
| Instructor | Rating | Difficulty | Would take again | Reviews |
|---|---|---|---|---|
| Sean Reilly | 5.0 / 5 | 1.2 / 5 | 100% | 10 |
From RateMyProfessors, which is student-submitted and not a survey. Small review counts move a long way on one bad quarter.
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