(AP) — A renowned ecologist will speak about the state’s prairies at the University of Nebraska-Lincoln.

Chris Helzer is scheduled to give a lecture on Sept. 27 at the Hardin Hall Auditorium on the university’s east campus. Doors open at 6 p.m. for the lecture, and space is limited.

Helzer has been gathering photos and stories about Nebraska prairies for more than two decades. He serves as program director for the Nature Conservancy, where he oversees the management and restoration of more than 4,000 acres of prairie, woodland and wetland habitats in eastern Nebraska.

Helzer is a frequent contributor to NEBRASKAland magazine, and is the author of “The Ecology and Management of Prairies.”

The talk is part of the Nebraska Statewide Arboretum’s Young Memorial Lecture series.