He has broad interests in marine paleoecology and macroecology using highly resolved micropaleontological records. His recent research has focused on the spatio-temporal dynamics of large-scale biodiversity patterns, the impact of climate on species diversity, and the controlling factor(s) of biodiversity pattern/change in deep-sea, shallow-marine, and pelagic ecosystems. He is also interested in microfossil-based conservation paleobiology and paleontology of Ostracoda in general.