Ann Bucklin is Professor Emeritus of Marine Sciences at the University of Connecticut known for her work using molecular tools to study zooplankton.

She served as director of the New Hampshire Sea Grant Program from 1992 until 2005 when she moved to the University of Connecticut in Groton, CT where she was the head of the Department of Marine Sciences until 2014.

[3] During 2014-2017, she served as chair of the Working Group on Integrative Morphological and Molecular Taxonomy (WGIMT) of the International Council for the Exploration of the Sea (ICES).

Starting with her graduate research on the sea anemone, Metridium senile, Bucklin worked on patterns of reproduction[6] and genetic differentiation of species.

[19] She uses DNA metabarcoding to analyze patterns of biodiversity of marine zooplankton based on environmental samples, including time-series collections during ecosystem monitoring programs.