The objective of this study is to compare the biodiversity of Typha ecosystems to that of the ecosystems of Phragmites australis. The common reed is known to disturb the stability of the ecosystem as they wipe out species of cattail. We aim to collect samples from the Norman J. Levy Park and Preserve located in Merrick. NY. The park contains both cattails and common reed, and will give us a clear understanding of the effect that the common reed possesses.