Avery P. Hill

I’m a global change ecologist at the California Academy of Sciences. My research focuses on anthropogenic vegetation transitions in western North America, spanning both montane forests and urban systems. I draw on natural history, large-scale geospatial modeling, community science, and environmental ethics, and I work to make ecological science legible to the communities who affect and are affected by changing ecosystems.

Research Overview

Conceptual life cycle of community science data
Fig. 1. Community science data can be a foundation for reciprocal relationships between actors addressing and affected by ecosystem change. Dashed teal arrows show each group's direct relationship to the ecosystem. Solid warm gray arrows trace how data, insights, and priorities pass between scientists, communities, and decision-makers.
Where and how are vegetation-type transitions occurring? (Fig. 1, Line 1)

Using historical vegetation data, modern forest inventories, and environmental data to characterize climate-induced range shifts. I primarily study vegetation-climate mismatch in the Sierra Nevada (i.e. “zombie forests”), with parallel work on urban refugia and the conservation value of urban biodiversity.

What are the impacts of these transitions? (Lines 2–3)

Investigating consequences for fire regimes, carbon storage, biodiversity, and the human communities embedded in these landscapes. Recent work includes wildfire behavior in zombie forests and co-authorship of the Nature and Climate Change chapter of The Nature Record.

How do we manage these transitions ethically and effectively? (Lines 4–9)

Developing ethical frameworks, community science platforms, and co-created management strategies that strengthen the reciprocal relationships between scientists, decision-makers, and local communities. This includes work to reframe nativeness as a gradient to better manage ecosystems in transition, a suite of tools to make biodiversity data more legible to the community scientists that collect it and the decision-makers that act on it, and community science campaigns that ground this work in local communities.

Select Publications

(2025). Documenting biodiversity with digital data: comparing and contrasting the efficacy of specimen-based and observation-based approaches. New Phytologist.

Cite DOI

(2024). Nativeness as Gradient: Towards a More Complete Value Assessment of Species in a Rapidly Changing World. Journal of Agricultural and Environmental Ethics.

Cite DOI

(2023). Low-Elevation Conifers in California's Sierra Nevada Are out of Equilibrium with Climate. PNAS Nexus.

Cite Code Video DOI

(2021). Forest Fires and Climate-Induced Tree Range Shifts in the Western US. Nature Communications.

Cite DOI

Projects

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Connecting Urban Biodiversity
Project evaluating the contribution of urban lands to SF Bay Area conservation goals with iNaturalist.
Connecting Urban Biodiversity
The Nature Record
I am serving as a co-author on the “Nature and Climate Change” chapter of the upcoming inaugural Nature Record report (formerly the U.S. National Nature Assessment).
The Nature Record
Stewardship documentary
A short student-made documentary about the meaning of stewardship in the SF Bay Area.
Stewardship documentary

Experience

 
 
 
 
 
California Academy of Sciences
Research Scientist
California Academy of Sciences
September 2025 – Present San Francisco, CA
 
 
 
 
 
California Academy of Sciences
Postdoctoral Researcher
California Academy of Sciences
September 2022 – September 2025 San Francisco, CA
 
 
 
 
 
Stanford University
Ph.D. in Ecology and Evolution
Stanford University
September 2017 – June 2022 Stanford, CA
 
 
 
 
 
Cornell University
B.S. in Biology
Cornell University
August 2013 – June 2017 Ithaca, NY

Web Applications

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San Francisco iNaturalist Coverage Explorer

San Francisco iNaturalist Coverage Explorer

Interactive map exploring biodiversity observations and spatial coverage patterns across San Francisco using iNaturalist data.

Contact

apaytonhill [at] gmail [dot] com