The source I have chosen is (Desmond, S. C., Garner, M., Flannery, S., Whittemore, A. T., & Hipp, A. L. (2021). Leaf shape and size variation in bur oaks: An empirical study and simulation of sampling strategies. American Journal of Botany, 108(8), 1540-1554. https://doi.org/10.1002/ajb2.1705). This falls into the category of academic, peer-reviewed research material. It is academic due to the authors being professional in the field with the paper containing in-text citations along with a references section. The information source comes from a peer-reviewed journal and since the source has both field report results along with methods and results sections it is research material.