Ecologist · Earth-System Science

Gabriel
DuPree

Researcher in Earth-system science & ecology

I study how buffers and boundary conditions govern Earth-system transitions across deep time, from the Great Oxidation Event to the Anthropocene. Alongside that research, I bring two decades of experience across the public and private sectors in wetlands, wildlife ecology, air quality, and energy.

LinkedIn ORCID
Environmental Scientist Earth-system science & wetland ecology Kansas City Metro

Interactive Earth monitoring globe. Use the left and right arrow keys to choose a monitoring event. Press Enter or Space to open its details. Press Escape to close.

Earth systems across deep time
About

I work on a single question from two directions: how do complex systems stay stable while quietly undergoing change?

As a researcher, I write on Earth-system science, ecology, and astrobiology: deep-time transitions, the buffers and sinks that delay visible change, and the chemical boundary conditions that open or close evolutionary possibility. The work spans the Great Oxidation Event, mass extinctions, hyperthermals, the origins of life, and the Anthropocene as a problem of recognizing risk before the window to act has closed.

That research is grounded in more than twenty years of environmental work across the public and private sectors, including service at the U.S. Environmental Protection Agency. Across research and practice, the same principle holds: effective protection depends on reading signals early and coordinating action while the system still retains slack.

RoleEnvironmental Scientist
FieldsEcology & Earth-system science
Public service20+ years, incl. U.S. EPA
Based inKansas City metropolitan area
EducationUniversity of Florida
Research

Preprints

01
EarthArXiv Preprint · 2026

Before the Threshold: Deceptive Stability, Buffer Slack, and Earth System Transitions

Proposes the Buffered Byproduct Regime Shift framework for interpreting Earth-system transitions in which finite sinks and buffers absorb a persistent load. The result can be a Deceptive Stability Interval: observable conditions remain stable while the capacity sustaining that stability is depleted, followed by threshold crossing and regime reorganization. The paper defines a six-phase sequence, distinguishes gradual saturation from threshold-collapse failure, and evaluates the framework across the Great Oxidation Event, the end-Permian extinction, the Ediacaran–Cambrian transition, the PETM, and the Anthropocene, using the K–Pg impact as a negative control.

Earth-system transitions Buffer slack Great Oxidation Event End-Permian Anthropocene Critical transitions
Read on EarthArXiv DOI: 10.31223/X56R30
02
ESS Open Archive Preprint · 2026

Extraterrestrial Chemical Boundary Conditions and Evolutionary Opportunity Space on Early Earth

Reframes extraterrestrial material as an exogenous chemical boundary condition whose significance depends on the changes it produces after arrival. Meteorites, returned asteroid samples, dust, and impacts can alter redox gradients, reactive phosphorus, catalytic surfaces, and habitats. The paper centers the mineral–water interface as the primary unit of analysis and proposes falsifiable tests across cosmochemistry, geomicrobiology, and phylogenomics, including the Paleoarchean S2 impact.

Astrobiology Early Earth Cosmochemistry Prebiotic chemistry Carbonaceous meteorites Phylogenomics
Read on ESS Open Archive DOI: 10.22541/essoar.15003931/v1
Interactive model

The signal that stayed calm

A two-channel sketch of the BBRS equations from paper 01. Channel 1 shows the routinely monitored observable; Channel 2 tracks buffer slack, which may be hidden or estimated indirectly. The first pass conceals Channel 2 so deceptive stability is experienced before it is explained.

Forcing · F1.00
Buffer capacity · B1.00
Recovery · G0.30
Conceptual phase I · Loading Illustrative boundaries
Outcome Ready Scenario Custom

 

CH1 · Routinely monitored observable CH2 · Buffer slack (initially concealed) Threshold crossing

Both papers are non-peer-reviewed preprints written in a personal capacity. The views expressed are the author’s own and do not represent the U.S. Environmental Protection Agency or the U.S. Government.

Deep time

From boundary conditions to now

The timeline begins with the chemical boundary conditions that shaped Earth’s early possibilities, then follows buffered transitions from the first rise of oxygen to the present. It also includes the K–Pg impact as a negative control. Drag or scroll to move through deep time.

~4.0 Ga

Hadean–Paleoarchean

On early Earth, material from space altered the chemical state space, redox gradients, and reactive surfaces that constrained prebiotic chemistry and early life. This case establishes boundary conditions on evolutionary possibility.

Boundary conditions
~2.4 Ga

Great Oxidation Event

Oxygen from early photosynthesis was absorbed by mineral and ocean sinks for hundreds of millions of years before molecular oxygen accumulated in the atmosphere and transformed surface chemistry.

Buffer drained
~541 Ma

Ediacaran to Cambrian

Animals began to burrow, filter, and engineer the seafloor, remaking their own surroundings as new body plans diversified. The framework holds this contested interval as a candidate case, a shift driven as much by life reshaping its environment as by outside forcing.

Candidate case
~252 Ma

End-Permian

Massive volcanism loaded the Earth system with carbon and heat. Climate and ocean buffers absorbed part of that forcing before failing, contributing to the largest mass extinction in the geologic record.

Buffer drained
~66 Ma

K–Pg impact

An asteroid impact caused abrupt ecological collapse without a preceding interval of buffer depletion. In the framework, it serves as the negative control for externally forced shock.

Negative control
~56 Ma

PETM

A large, rapid carbon release sharply warmed the planet. Buffers slowed the response, while the excursion remained visible in the sediment record.

Buffer drained
Now

Anthropocene

Human forcing is drawing down climate and ecological buffers in real time. The open question is whether the loss of slack is recognized before critical thresholds are crossed.

In progress
Focus areas

Research themes & practice

Thresholds

Buffered stability & tipping

How sinks and buffers hide accumulating strain, and why apparent calm can be a warning rather than a reassurance.

Deep time

Earth-system transitions

Comparative reading of oxygenation, mass extinctions, and hyperthermals as a single grammar of regime change.

Origins

Astrobiology & early Earth

Extraterrestrial chemistry as a boundary condition shaping the range of possible biological trajectories.

Now

The Anthropocene window

Treating intervention as a timing problem: recognizing declining buffer slack before the window to act closes.

Practice

Air, land, water, and energy

Two decades of applied environmental work, turning science and policy on wetlands, rivers, air, energy, and ecological restoration into measurable outcomes.

Service

Leadership & public service

Aligning people, priorities, and institutions so that complex environmental decisions actually get made and carried out.

Connect

Get in touch

Open to conversations about Earth-system science, aquatic ecology, wildlife conservation, environmental leadership, energy, collaboration, and mentorship. LinkedIn and the contact form below are the best ways to reach me.

LinkedIn

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