Center for Urban Ecology and Sustainability at Butler University (CUES) - builds upon a solid history of student-faculty research and community service to foster and support the exploration and stewardship of the urban ecosystems of Indianapolis.
Conserving Indiana - The Central Indiana Land Trust (CILTI) - the Central Indiana Land Trust Incorporated preserves natural areas, improving air and water quality and enhancing life in our communities for present and future generations.
Google Scholar - gives bibliographic access to the scholarly literature.
Midwest Invasive Plant Network
The Nature Conservancy (TNC) - dedicated to preserving plants, animals and natural communities. Indiana Chapter - http://www.nature.org/en-us/about-us/where-we-work/united-states/indiana/