By Dan Buckler, DNR Urban Forest Assessment Specialist
Daniel.Buckler@wisconsin.gov or 608-445-4578
Especially in the wake of emerald ash borer, urban foresters have stressed species diversity as an important goal in the management of local trees. Now there is a new, intuitive way of tracking species diversity by simply counting how many species it takes to make up half of your community’s trees.
This metric is called the top diversity index, or TD-50 index, and was proposed in a 2022 article in Urban Forestry and Urban Greening by Natalie Love and others. The index is deceptively simple — by counting the minimum number of species it takes to comprise 50% of your trees, you have an easy benchmark to improve upon to reduce your reliance on a few species. Continue reading “A New, Intuitive Way To Measure Species Diversity”
The deadline to apply for federal Recreational Trail Program (RTP) grants has changed from May 1 to March 1 annually.
* These training opportunities are provided as an information service only and do not constitute an endorsement from the Wisconsin Department of Natural Resources (DNR).




The Wisconsin Department of Natural Resources (DNR) today announced Urban Forestry Grant Program recipients for the 2026 grant year. The program helps fund projects consistent with state and national goals for increasing the urban forest canopy.
Trees are good. For those who hold trees in high esteem, this simple statement feels as much a universal truth as the sky being blue or the sun rising in the east. It can feel unfathomable that anyone might hold a contrasting opinion.