Researching Environmental Change & Urban Ecosystem Resilience

My research examines how urban development and environmental change affect ecosystems, with particular attention to urban forests, surface temperature, and the sustainability of vegetation in cities. I use satellite remote sensing, geospatial analysis, and statistical modeling to investigate environmental patterns and inform climate adaptation.

Michael Oyekunle Oyelakin • Environmental and Ecological Engineering, Purdue University

I am a PhD researcher in Environmental and Ecological Engineering at Purdue University. My work focuses on the relationships among urban development, environmental conditions, and the ability of urban vegetation to remain viable under changing climates. My training in physics, Earth system physics, and atmospheric sciences informs the questions I ask and the quantitative methods I use.

I am interested not only in how much tree canopy a city has, but also in the condition of that vegetation, the pressures it experiences, and how its ecological benefits may change over time. My broader interests include Earth observation, urban climate, environmental disturbance, spatial modeling, and evidence-based environmental management.

Thematic Research Interests

Five primary domains connecting physical sciences, geospatial computing, and ecological adaptation.

Urban Ecology & Forest Sustainability

How built environments, land cover, and environmental stress relate to urban tree greenness, condition, and long-term sustainability.

Urban Climate & Climate Change

Urban heat islands, land surface temperature, urbanization, and climate-related exposure in cities.

Remote Sensing & Geospatial Science

Satellite observations and GIS for monitoring vegetation, measuring environmental variability, and characterizing landscapes.

Environmental Modeling & Data Science

Nonlinear statistical modeling, machine learning, spatial analysis, and model validation for environmental research.

Climate Resilience & Environmental Equity

How vegetation condition and future vulnerability intersect with neighborhood susceptibility and urban adaptation priorities.

Urban Tree Condition, Future Heat, and Neighborhood Reliability

A three-chapter dissertation on urban ecosystem resilience and climate adaptation • Indianapolis, Indiana • Purdue University • Advisor: Brady S. Hardiman

My dissertation asks how urban form and future warming shape the condition of inventoried urban trees and whether the resulting differences in ecological reliability matter for neighborhoods with greater heat-health susceptibility. The three chapters share an Indianapolis environmental data system but answer different questions: Chapter 1 examines current greenness and heat relationships across spatial scales; Chapter 2 models taxon-specific greenness responses under future warming scenarios; Chapter 3 investigates how current condition and future reliability are distributed across neighborhoods.

Empirical Foundation: An initial municipal inventory of 190,255 georeferenced records, 188,476 records in the Chapter 1 analytical dataset, 16 PlanetScope dates from the 2021 growing season, 2021 imperviousness and canopy products, and 2014-2021 Landsat summer surface-temperature climatology.

Current Conditions

At what spatial scales are imperviousness, tree greenness, and summer surface heat most strongly associated?

Status: Ongoing • Manuscript in Preparation

Future Vulnerability

How might different tree taxa respond to projected climate and urbanization warming under surrounding canopy context?

Status: Ongoing • Analysis in Development

Reliability & Equity

Do susceptible neighborhoods have canopy that is currently green and projected to remain reliable under future warming?

Status: Planned • Proposal Developed

Scientific Projects

Explore detailed investigations across urban ecology, thermal environments, and remote sensing.

Ongoing • Manuscript in Preparation

Spatial-Scale Dependence of Urban Vegetation Condition and Thermal Environments in Indianapolis, Indiana

This study investigates whether impervious surfaces relate to tree greenness and urban temperature at the same spatial extent, integrating municipal tree records with 16 PlanetScope observations and Landsat summer LST.

Ongoing • Scenario Analysis in Development

Projecting Taxon-Specific Greenness Vulnerability of Indianapolis Urban Trees Under Climate and Urbanization Warming

Estimates how observed greenness-temperature relationships differ across common tree taxa and planting contexts, combining models with future urbanization and land surface temperature projections for 2050 and 2100.

Ongoing • Collaborative Project

Chicago : Emerald Ash Borer, Street-Tree Removal, and Urban Surface Temperature

Investigating whether the loss and removal of ash street trees associated with emerald ash borer infestation correspond to changes in summer land surface temperature in Chicago using Landsat thermal observations (2007-2017).

Research Conducted • Classification Experiments

Satellite-Based Urban Tree Species Identification Using Phenology and Machine Learning

Evaluates whether high-resolution satellite observations collected across the growing season can help distinguish urban tree species through phenological patterns using multi-date PlanetScope imagery and Random Forest.

Planned • Proposal Developed

Chapter 3 : Beyond Canopy Cover: Current Greenness Condition, Future Reliability, and Heat-Health Susceptibility

Investigates whether Indianapolis neighborhoods with greater medical susceptibility or social vulnerability have comparable access to urban trees in good current condition and with lower projected future vulnerability.

Completed Analytical Work

Documented analytical components and verified computational milestones.

Inventory & Raster Integration

Municipal inventory of 188,476 trees integrated with satellite greenness, canopy, imperviousness, and temperature layers.

Six-Scale Exposure Modeling

Impervious surface representations compared at six window widths from 30m to 330m using generalized additive models.

Primary Nonlinear Analyses

Main GAM relationships and partial-response curves developed identifying response-specific scale divergence.

Relative Low-Greenness Mapping

Lowest modeled greenness decile mapped across central and heavily developed municipal corridors in Indianapolis.

Phenology & Classification Experiments

Multi-date satellite vegetation extraction and machine-learning classification experiments documented.

Preliminary Disturbance Modeling

Preliminary modeling of municipal tree removal and thermal trend relationships in Chicago.

Methods & Technical Capabilities

Remote Sensing:

PlanetScope multispectral imagery, Landsat, NDVI time-series, Land Surface Temperature (LST).

GIS & Spatial Analysis:

ArcGIS Pro, raster extraction, moving window convolution, geospatial integration, spatial mapping.

Machine Learning:

Random Forest, recursive feature elimination, species-classification experiments.

Statistical Modeling:

Generalized additive models (GAMs), nonlinear response functions, repeated subsampling, sensitivity analysis.

Scientific Computing:

Python, pyGAM, R, Google Earth Engine, geospatial data science libraries.

Environmental Equity:

Census-tract aggregation, CDC PLACES, CDC/ATSDR Social Vulnerability Index (SVI), ACS.

Interested in Research Collaboration?

I welcome research connections involving urban ecosystems, environmental sustainability, climate resilience, remote sensing, and geospatial analysis.

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