2015 Scientist Lecture Series

Each year, The Holden Arboretum's Scientist Lecture Series invites you to delve deeper into the issues and conditions that impact the world around us. These free, academic lectures allow you to step back into the classroom and learn from the experts. Programs are held at The Holden Arboretum’s Warren H. Corning Visitor Center.


Each lecture is free and open to the public, but registration is required.


Truths and Roses Have Thorns About Them: The Prickly Problem of Invasive Species.

Rebecca E Drenovsky, PhD, Biology Department, John Carroll University

Thursday, Jan. 15, 7pm


Drenovsky is a plant biologist whose research investigates how interactions between plants and the soil environment affect plant ecology and physiology. Her research explores how plants acquire and store nutrients, and how nutrient limitation affects ecological processes. Her research also examines the factors that allow some species to become invasive. Drenovsky’s research is important given current pressures on native environments resulting from human environmental alteration and species invasion.



The Ecosystem Services and Values Provided By America's Urban Forests

David Nowak, PhD, USDA Forest Service Northern Research Station

Thursday, Feb. 12, 7pm


Nowak is a research forester with the Forest Service’s Northern Research Station and project leader for the Urban Forests, Environmental Quality and Human Health program. The goal of Nowak’s research is to investigate the plant community composition in urban areas and identify the environmental or ecosystem services these plant communities provide. Nowak is also involved in developing tools that can be used to aid in management and planning decisions that sustain urban forest health and services. 



Tree Growth Curves: A Context for Urban Forest Management and Planning

Jason Grabosky, PhD, John and Eleanor Kuser Faculty Scholar in Urban Forestry, Rutgers University.

Thursday, March 5, 7pm


This presentation will develop and discuss a series of conceptual curves for the organization of urban tree management. The curves will consider environmental services over time and how common site measures can be used to monitor urban tree performance expectations. The curves will then be further discussed in the context of a series of five studies targeting early life, coming of service size and end-of-usefulness (or over-maturity) in the urban situation.


Grabosky teaches classes in tree care and management, and maintains research projects with several talented graduate students in the plant biology, landscape architecture, ecology and evolution and environmental science programs in the Rutgers University School of Environmental and Biological Sciences.



International Society of Arboriculture (ISA) members can earn CEUs for some of the lectures. Teachers attending all or part of the series can qualify for graduate credit through Ashland University when combined with independent study. Contact Sharon Graper for information on graduate credit requirements and fees at 440.602.3843 or sgraper@holdenarb.org.