Stephanie I. Anderson

Stephanie I. Anderson

Research Ecologist

U.S. Environmental Protection Agency

I am a Research Ecologist at the United States Environmental Protection Agency where my research focuses on marine algae, including harmful algal bloom (HAB) species, and their community responses to environmental change such as ocean warming, eutrophication, and marine carbon dioxide removal (mCDR) methods. Our collaborative projects use field data, historical observations, and models to discern how changes in ocean chemistry and physical properties may impact water quality and biological productivity.

Previously, I was a Simons Foundation Postdoctoral Fellow in Marine Microbial Ecology at the Massachusetts Institute of Technology. I worked under the direction of Dr. Stephanie Dutkiewicz examining phytoplankton thermal trait differentiation in a modeled ocean. For my doctoral dissertation with Dr. Tatiana Rynearson at the University of Rhode Island Graduate School of Oceanography, I employed experimental, molecular, and modeling approaches to investigate the role of temperature in driving phytoplankton physiology, community structure, and biogeography.

Interests
  • Trait-based ecology
  • Phytoplankton
  • HABs
  • mCDR
Education
  • Ph.D. Oceanography, 2021

    University of Rhode Island

  • Teaching Credential, 2013

    Loyola Marymount University

  • B.A. Molecular, Cellular & Developmental Biology, 2012

    University of Colorado Boulder

Projects

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HABs
Exploring the drivers of harmful algal blooms (HABs) to improve monitoring and forecasting efforts
Thermal Traits
Characterizing the phytoplankton thermal response and employing empirical data in ecological simulations and global projections
Temperature-Nutrient Interplay
Investigating the interactive effects of temperature and nutrient availability on phytoplankton community composition

Recent Publications

(2026). Nutrient availability modulates impacts of short-term shifts in temperature and grazing on phytoplankton composition and size structure. Limnology & Oceanography.

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(2026). Revisiting chlorophyll a thresholds for San Francisco Bay: insights from observations of phytoplankton molecular abundance. Harmful Algae.

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(2024). Phytoplankton thermal trait parameterization alters community structure and biogeochemical processes in a modeled ocean. Global Change Biology.

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(2023). Dual thermal ecotypes coexist within a nearly genetically identical population of the unicellular marine cyanobacterium Synechococcus. Proceedings of the National Academy of Sciences.

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