Carol Ann Stepien is an American ecologist at the National Museum of Natural History of the Smithsonian Institution. She was elected a fellow of the American Association for the Advancement of Science in 2016.

Stepien has a B.S. from Bowling Green University and an M.S. from the University of Southern California. ^[1] She earned her Ph.D. in 1985 working on Chironemus. ^[2] She did postdoctoral work with Richard Heinrich Rosenblatt at Scripps Institution of Oceanography ^{[3] [4]} and David Hillis at the University of Texas at Austin. ^[5] In 1992 she joined the faculty at Case Western Reserve University where she remained until 2000. ^[1] She then moved to Cleveland State University and held a position there until 2014. ^[1] Concurrently, she joined the University of Toledo in 2004, and was appointed Distinguished University Professor in 2012. ^[6] She was Director of the Lake Erie Research Center from 2004 until 2016. ^[6] In 2016, ^[7] she moved to the National Oceanic and Atmospheric Administration (NOAA) where she led the Pacific Marine Environmental Laboratory's Ocean Environmental Research Division until 2021. ^[8] Starting in 2017, she became a research associate at National Museum of Natural History. ^[8]

Stepien's research centers on the genetics and genomics of marine and freshwater fishes and invertebrates. Her early research examined genetic divergence in fish, ^[9] and the population genetics of walleye, ^[10] bivalves, ^[11] and rockfish. ^[12] She is interested in the population genetics and evolutionary patterns of invasive species, and has used genetic tools to study invasive species such as the zebra mussel and quagga mussel. ^[13] Her research on the goby fish centered on comparisons of goby fish populations from North American and Eurasia. ^{[14] [15]} She has also examined viral hemorrhagic septicemia, viruses that cause disease in finfish ^[16] and has developed new techniques to track the virus. ^[17] She has also used metabarcoding to track invasive species. ^{[18] [19]} She also is working with collaborators to apply eDNA biotechnology for monitoring and assessing marine and aquatic biological community dynamics using eDNA collected remotely from buoys, drones, AUVs, and gliders.^{[ citation needed]}

• Muss, Andrew; Robertson, D. Ross; Stepien, Carol A.; Wirtz, Peter; Bowen, Brian W. (2001). "Phylogeography of Ophioblennius: The Role of Ocean Currents and Geography in Reef Fish Evolution". Evolution. 55 (3): 561–572. doi: 10.1111/j.0014-3820.2001.tb00789.x. ISSN  1558-5646. PMID  11327163. S2CID  7274314.
• Stepien, Carol A.; Tumeo, Mark A. (2006). "Invasion Genetics of Ponto-Caspian Gobies in the Great Lakes: A 'Cryptic' Species, Absence of Founder Effects, and Comparative Risk Analysis". Biological Invasions. 8 (1): 61–78. doi: 10.1007/s10530-005-0237-x. ISSN  1387-3547. S2CID  24114412.
• Stepien, Carol A.; Faber, Joseph E. (1998). "Population genetic structure, phylogeography and spawning philopatry in walleye (Stizostedion vitreum) from mitochondrial DNA control region sequences". Molecular Ecology. 7 (12): 1757–1769. doi: 10.1046/j.1365-294x.1998.00512.x. ISSN  1365-294X. PMID  9859203. S2CID  25376633.
• Molecular systematics of fishes. Thomas D. Kocher, Carol A. Stepien. San Diego: Academic Press. 1997. ISBN  978-0-12-417540-2. OCLC  162128650.{{ cite book}}: CS1 maint: others ( link)

In 2010, she was awarded the Sigma Xi Scientific Society's Outstanding Researcher award. ^[1] In 2016, Stepien elected a fellow of the American Association for the Advancement of Science (AAAS) who cited her “for distinguished contributions to the fields of molecular evolutionary ecology and conservation genetics, particularly invasive and native populations, and mentorship of graduate and undergraduate students”. ^{[6] [20]}

• Carol Stepien publications indexed by Google Scholar