LOUISVILLE, Ky. (WHAS11) -- Louisville Mayor Greg Fisher is calling on Louisvillians to volunteer in the community.
He's asking everyone to take one day this week and give back as part of the "Give a Day" event.
One place where volunteers are needed is in Louisville's parks.
A group called the Olmsted Parks Conservancy works at least six days a week to improve and restore Cherokee, Seneca, Iroquois and Shawnee parks.
They're removing invasive plants, improving animal habitats and increasing bio-diversity.
Recently volunteers have been identifying non-native plants, cutting them down, and then replacing them with native species to create a healthier forest.
“A big oak tree drops acorns. Those acorns turn into oak seedlings but if they get shaded out by competing understory trees that choke them out, we won't get the next generation of trees,” Matt Spalding, volunteer coordinator of Olmstead Parks Conservancy, said.
Members of the Olmsted Parks Conservancy meet with volunteers nearly every Sunday and also organize cleanup events with schools, churches or business groups.
Click here for more information on "Give a Day."