UC’s latest survey follows in the footsteps of Cincinnati botanist Thomas G. Lea, who conducted a plant survey in Cincinnati between 1834 and 1844. During that time, he built up an herbarium of specimens that went to the Academy of Natural Sciences in Philadelphia. Lea identified some 714 species before he died in 1844. His work was published posthumously in 1849 by his brother.
A century later, famed UC botanist E. Lucy Braun retraced Lea’s path, conducting a second plant survey in Cincinnati that found more than 1,400 species in her 1934 study published in The American Midland Naturalist. She leaned on Lea’s meticulous notes to return to the places he visited, many of which had been developed into homes, roads or apartment buildings over the decades.
UC biologist Denis Conover and his co-author Robert Bergstein retraced the steps of Braun and Lea in southwest Ohio in places where city development did not pave over natural areas. They found that many species purposely introduced as landscaping plants are flourishing in the wild.
“The spread of nonnative invasive species into wooded natural areas in southwestern Ohio threatens the continued survival of native flora and fauna. Efforts by park managers and volunteers to control invasive plant species has become a major part of their duties. This effort will be required in perpetuity and will be at great expense both monetarily and timewise due to collateral damage to native plants, wildlife and humans caused by the extensive use of herbicides, chainsaws and other mechanical equipment,” the study concluded.