The Ohio State University at Marion


Ohio State Marion Biology Coordinator

Dr. Susan Gershman

Associate Professor
Science & Engineering Building, Room 110E (Research Lab 110F)

My research focuses on the evolution of animal behavior. I am most interested in sexual selection, differences in reproduction caused by heritable differences in the ability to reproduce. I use insects, including crickets and flies, as my study subjects.

Anothoy D'Orazio

Morrill Hall, Room 350C

Dr. Jonathan Calede

Assistant Professor
Science & Engineering Building, Room 110C

My research integrates comparative anatomy, morphometrics, phylogenetics, and biostatistics to reconstruct the ecology and evolution of fossil mammals. I focus on the study of mammals that lived 30 to 5 million years ago. These mammals have living relatives so I often study the morphology of modern mammals to understand the taxonomic affinities and phylogenetic relationships of fossil mammals and help resolve patterns of diversity through time. I also use comparative anatomy and morphometrics to infer the ecology (such as diet, locomotion, and body mass) of fossils mammals.

Dr. Melissa L. Petreaca

Senior Lecturer
Science & Engineering Building, 210G

Dr. Ruben C. Petreaca

Assistant Professor
Science & Engineering Building, 110A (Research Lab 110B)

Ph.D, University of California, Riverside: Postdoctoral training, University of Southern California, Los Angeles

My research aims to understand how DNA damage is repaired in eukaryotic cells. Loss of efficient DNA damage repair causes accumulation of mutations which is a hallmark of cancer cells. I am using yeast for these studies which is a great eukaryotic model system.

Dr. Frances Sivakoff

Assistant Professor
Morrill Hall, Room 110G

My research explores the factors that regulate arthropod abundance and distribution, for both pests and beneficial species, across agricultural, natural, and urban landscapes. Across these systems, my goal is to explore how changes in habitat quality influence the sustainability of ecosystem services. I use a variety of methodological approaches, including manipulative field experiments, landscape analyses, simulations, ecoinformatics, and molecular approaches, to tackle ecological questions related to this goal.

Dr. Daniel Wojta


Bachelor’s in Zoology; Master’s in Exercise Physiology, both from the Ohio State University; Ph.D. in Exercise Physiology from the University of Toledo; eight years of research, into the preventive and therapeutic effects of exercise and diet in the treatment of Diabetes Mellitus, four as a graduate research fellowship at the University of Toledo and four years as a NIH sponsored post doctoral fellowship at the Washington University School of Medicine in St. Louis. Awarded teacher of the year at the OSU Mansfield campus, 2005-2006.