Population and Community Ecology

Understanding the interactions among groups of organisms and their environment at the community and population scale.


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Associate Professor
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Kait Frasier
Assistant Research Scientist
Colleen Petrik
Assistant Professor
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Research Geophysicist
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Associate Professor
Associate Researcher
Mark Ohman
Distinguished Professor
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Centers, Labs, and Programs

We analyze the interactions among marine ecology and biodiversity, fisheries, socioeconomics, climate change, and more.

We use sequence-based approaches, flow cytometry, modeling, and other techniques to explore the structure and function of microbial communities.

We take advantage of molecular genetic approaches to examine diverse questions in ecology and evolution.

CalCOFI is a long-term, interdisciplinary, cross-sectoral ecosystem research program off the coast of California that holistically studies the physics, biogeochemistry, and biology of the marine environment to inform the sustainable management of marine resources in the context of climate change


Investigating nonlinear transitions in the California Current coastal pelagic ecosystem.

Promotes interdisciplinary research and educational approaches to maintain the integrity of ocean ecosystems and manage their use in the face of rapid and inevitable global change.

Studies coral reef ecosystems to answer fundamental questions of population biology, trophic dynamics, and spatial ecology.

A working group of scientists united by an integrated, interdisciplinary approach to studying coral reefs across gradients of anthropogenic stress.

Dedicated to generating and disseminating scientific information that has a direct, positive impact on conservation and management issues and policies in the region.


Levin is a marine ecologist who studies benthic ecosystems in the deep sea and shallow water.