Research Areas
01
Phosphorus Cycling & Phytoremediation
Engineering vegetation harvest strips and phytoremediation strategies to mitigate legacy phosphorus pollution from historically fertilized ranchlands, pastures, and wetlands.
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02
Microbial Community Assembly
Quantifying how belowground fungal and bacterial communities assemble and mediate nutrient cycling, plant health, and ecosystem-level patterns — from phyllosphere to rhizosphere.
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03
Carbon Cycling in Forests
Investigating how soil microbial communities drive organic carbon accumulation and nutrient dynamics across tropical forest succession, land-use change, and biogeochemical gradients.
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04
Plant–Soil Feedbacks & Tropical Diversity
Examining how mutualist and pathogen fungi in soils drive conspecific negative density dependence and maintain the extraordinary diversity of tropical forests.
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Ongoing Work & Active Projects
Active Project
SOS Plots
Multi-stressor field experiments examining independent and interactive responses of microbe, invertebrate, and plant communities to global change factors at the Cary Institute.
Active Project
Canopy Soil
Investigating the role of canopy soils — often-overlooked reservoirs of organic matter and microbial diversity — in forest nutrient cycling and carbon dynamics.
Active Project
GPR Scanning
Using ground-penetrating radar to uncover buried 'islands of fertility' and trace subsurface phosphorus architecture in Florida ranch landscapes.
Active Project
CNDD & Tropical Diversity
Investigating how conspecific negative density dependence mediated by soil fungi maintains tropical tree diversity, with implications for the role of phosphorus as a key limiting nutrient.
In the Field

My Approach

I am powerfully motivated to consider issues of both food safety and environmental sustainability in the context of our changing climate. I conduct experimental research designed to quantify organism-level mechanistic connections underlying plant-soil dynamics, and pursue theoretical work intended to apply these first principles to predict broader community-level patterns and suggest amendments for ecosystem conservation and agricultural management.

My work spans subtropical pastures and wetlands (Florida), tropical forests (Panama, Mexico, China), savannas (Kenya), and temperate forests (northeastern USA). I'm trained in stable isotope mass spectrometry, soil metagenomics, ground-penetrating radar, drone remote sensing, and molecular genetics.

Get in touch.
I'm always interested in new collaborations, speaking invitations, and conversations about ecology and sustainability.
petticordd@caryinstitute.org