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Everett Yee
IUSD
CTE Professional Externship
February 21, 2011
Class: AP Environmental Science
11th - 12th grade
Unit: Endangered Species
Mark Pavelka, USFWS
CA State Standards addressed: Ecology
6. Stability in an ecosystem is a balance
between competing effects.
a. Students know biodiversity is the sum total of
different kinds of organisms and is affected by
alterations of habitats.
c. Students know how fluctuations in population
size in an ecosystem are determined by the relative
rates of birth, immigration, emigration, and death
CA State Standards addressed: Evolution
8. Evolution is the result of genetic changes
that occur in constantly changing
environments.
c. Students know the effects of genetic drift on the
diversity of organisms in a population
d. Students know reproductive or geographic
isolation affects speciation.
Will Miller
Biomonitor Wildlife Biologist
U.S. Fish and Wildlife
Service
Location: Dana Point Headlands Preserve
Center for Natural Lands Management
Preserve Manager: Lee Ann Carranza
Endangered Species
California gnatcatcher
Endangered Species
Pacific pocket mouse
Pacific pocket mouse
USFWS
- Thought to be extinct but small
population found in 1993
- Only known populations in Dana Point
and Camp Pendleton
Pacific pocket mouse
Threats: cats,
habitat loss,
human disturbance
Future: captive
breeding program
with the San Diego
Zoological Society
Cheryl Brehme, USGS
Externship Reflection
Students see local examples of endangered
species and how the U.S. Fish and Wildlife
Service works to uphold the Endangered
Species Act to protect these species
Externship Reflection
Human encroachment continues to be a threat.
Finding balance between human use of the land
and protection of endangered species remains
difficult to manage.