Over time, biodiversity can change and vary in many ways, for example, in response to urbanization, climate change and invasive species. Pollinators are important animals as they facilitate plant reproduction and maintain plant biodiversity. Our research compares historical data about plant-pollinator relationships in Putnam Park and how it compares to modern data we collected over the summer. We expected to see similar numbers of plant-pollinator relationships, but with some new additions and missing links. To test this hypothesis, we first collected data by observing and catching non-bee pollinators in Putnam Park. We compared the data we collected to the historical data obtained from years of 1882-1928, and this allowed us to see if there was a change in plant-pollinator interactions. We evaluated present and past plant-pollinator relationships by creating a plant-pollinator network to model the consistent and changing relationships. We collected 65 specimens throughout our 10 days of observation between June 1st and September 1st of 2025. We also observed 49 different flowering plant species. We found multiple plant-pollinator relationships that have disappeared, as well as new ones that have appeared, telling us that there are both new additions and missing links that contribute to the biodiversity of Putnam Park.
