Overview
Clark’s lab uses using long-term experiments and monitoring studies to understand disturbance and climate controls on ecosystem dynamics. Clark is a Fellow of the Ecological Society of America, which also recognized him with the William Skinner Cooper Award, for his research on barrier beach dynamics, and the George Mercer Award, for studies of climate change and fire. He is an ESA Aldo Leopold Leadership Fellow. For excellence in teaching and research, he was one of 15 scientists recognized with the National Science Foundation’s five-yr Presidential Faculty Fellow Award. He is a recipient of the Humboldt Research Prize and a Lauréat of Emmanuel Macron’s Make Our Planet Great Again. Clark is a member of the National Academy of Sciences and the American Academy of Arts and Sciences.
Among recent activities he led the National Assessment on Effects of Drought on Forests and Rangelands in the United States: A Comprehensive Science Synthesis, an effort involving 70 academic and government scientists that received the Chief of the Forest Service Science Award for 2016. Clark has authored more than 250 refereed scientific articles and published four books. Full publication list.
Clark has testified before congress on behalf of the Ecological Society of America and the NSF budget. He served on editorial boards for Ecology and Ecological Monographs, Annual Reviews of Ecology and Systematics, Global Change Biology, Ecosystems, Elementa, Trends in Ecology and Evolution, and the Journal for Agricultural, Biological, and Environmental Statistics. He has served on NSF Advisory panels for Ecology, Earth System History, LTER, Ecology and Evolution of Infectious Disease, and Ecosystem Science. He chaired ESA’s Mercer Award Committee and was Vice President for Science. He was a founding member of the Science Advisory Board of the National Center for Ecological Analysis and Synthesis.
Current Appointments & Affiliations
Recent Publications
Gentrification and urban forest structure and stress: Lessons from two cities
Journal Article Urban Forestry and Urban Greening · March 1, 2026 Urban trees must be both present and healthy to provide vital ecosystem services, but there are documented inequities in tree canopy cover within U.S. cities. These inequities, like cities themselves, are not static. However, the influence of urban social ... Full text CiteFungal community and taxa specialization to host and environment interactions in two temperate forests.
Journal Article PloS one · January 2025 The structure and function of plant-associated fungal communities (i.e. mycobiome) is shaped by biotic and abiotic factors, and can impact plant community dynamics. We evaluated the effects of different environmental factors in structuring the communities ... Full text CiteThe Relationship Between Maturation Size and Maximum Tree Size From Tropical to Boreal Climates.
Journal Article Ecology letters · September 2024 The fundamental trade-off between current and future reproduction has long been considered to result in a tendency for species that can grow large to begin reproduction at a larger size. Due to the prolonged time required to reach maturity, estimates of tr ... Full text CiteRecent Grants
Determining forest recruitment change through the integration of NASA Earth observation data and predictive modeling
ResearchCo Investigator · Awarded by National Aeronautics and Space Administration · 2025 - 2029Determining forest recruitment change through the integration of NASA Earth Observation Data and predictive modeling
ResearchPrincipal Investigator · Awarded by Pennsylvania State University · 2024 - 2027Collaborative Research: Continent-wide forest recruitment change: the interactions between climate, habitat, and consumers
ResearchPrincipal Investigator · Awarded by National Science Foundation · 2022 - 2026View All Grants