Jesse Krause

Dr. Krause earned a Bachelor of Science in Biology at Sonoma State University in 2007. He did his senior thesis with Dr. Daniel E. Crocker investigating the hormonal regulation of sodium balance in lactating and fasting elephant seals. In 2008, Dr. Krause joined the laboratory of John C. Wingfield at the University of California, Davis, and focused on the endocrine regulation of stress and reproduction in songbirds. After completing his Ph.D. he continued as a postdoctoral researcher in the laboratory of Dr. John C. Wingfield for one year until a collaborative grant with Dr. Simone L. Meddle, at the Roslin Institute, University of Edinburgh, was funded in 2016. Between 2016 and 2018, Dr. Krause split his time between the University of California, Davis, and the Roslin Institute studying seasonal changes in gene expression associated with stress and reproduction. Dr. Krause was hired by the University of Nevada, Reno, Biology Department, in 2018 as a teaching assistant professor. Dr. Krause enjoys teaching using the dry erase board. He remains active in research and has several ongoing collaborations.

Research interests:
Dr. Krause is classically trained as a physiologist although his interests have broadened over his career to include ecology and behavior. He is particularly interested in how organisms integrate environmental information to control the expression and progression through life history stages (ie migration, breeding, molt, etc). As a field biologist working in California and Alaska, he has come to appreciate that no discipline within biology it is impossible to separate physiology from ecology and behavior. As an endocrinologist, he is particularly interested in how physiology and behavior are controlled through endocrine signaling mechanisms. Dr. Krause's Ph.D. and postdoctoral research focused on the regulation of stress and reproduction in White-crowned sparrow (Zonotrichia leucophrys) and Lapland longspurs (Calcarius lapponicus). Birds, as with many other species across a broad range of taxa, use the endocrine system to appropriately time reproduction while dealing with environmental challenges (predation, storms, food shortages, etc). The importance of the interplay between these two systems is becoming more evident as animals deal with a changing environment either through climate change or encroachment by urbanization. Seasonally breeding animals are under a strong selective pressure to breed at the appropriate time of year to ensure high fecundity. This has resulted in selection and utilization of key environmental signals, such as photoperiod, to control endocrine signaling cascades for various physiological processes including reproduction. However, environmental stressors can impair the reproductive axis through the secretion of the stress hormone corticosterone. Dr. Krause's Ph.D. and postdoctoral research have focused on the regulation of stress and reproduction by investigating plasma levels of hormone and tissue expression of receptors and steroid metabolizing enzymes.

Anne Leonard

We study plant-pollinator interactions from nutritional and cognitive perspectives. We are interested in understanding how bees evaluate, learn about, and remember flowers. Likewise, we are interested in how the nutritional value of the nectar and pollen plants offer bees structures interactions with pollinators and co-flowering members of plant communities. An interest in understanding how human activities can perturb these interactions drives a parallel line of research, on how sublethal exposure to pesticides can affect bee behavior, sensory systems, and health. We address these questions using a combination of lab-based and field studies, often on bumblebees, at Sierra Nevada and Great Basin field sites.

Steve Frese

Dr. Frese’s research is centered on the human gut microbiome and its inhabitants. Our work at the University of Nevada, Reno examines how diet, food science, and biotechnology can be leveraged to meaningfully improve human health and nutrition.

Chad Cross

Dr. Cross is trained as a multidisciplinary scientist. He received is PhD in Ecological Sciences (focus in Quantitative Ecology and Statistics) from Old Dominion University in Norfolk Virginia. He additionally holds several master’s degrees: Computational & Applied Mathematics/Statistics (Old Dominion University), Medical Entomology & Nematology (University of Florida), and Counseling (University of Nevada, Las Vegas). His undergraduate training was at Purdue University, where he earned two bachelor’s degrees, one in biological sciences and the other in wildlife science. Dr. Cross has several active areas of research. These include: (1) Public Health: Investigations in population health related to chronic and infectious diseases, with special emphasis on quantitative methodology and use of large databases; (2) Epidemiology & Biostatistics: Applications of statistics and epidemiological principles to problems in the health sciences – for example clinical trials, multivariate models, and population sampling strategies; (3) Medical Entomology & Parasitology: Applied research and field work in arthropod-borne and parasitic diseases, including population-based estimation of disease burden and the intersection of medical entomology and forensic science; (4) Quantitative Ecology: Applications of statistics to problems in the environmental and ecological sciences – for example Bayesian models for estimating avian fatality around wind turbines and mark-recapture sampling; and (5) Psychometrics: Applications of statistics to problems in the psychological sciences – for example randomized controlled trials for interventions and pattern recognition for finding clusters of patients with shared pathology.

Donald Price

A major theme in my research is to understand how species adapt to diverse environmental and biological factors and diverge into new species. The evolutionary changes that permit species to survive and reproduce across a wide range of environments has resulted in a remarkable range of biological complexity.

My research group studies the interplay of behavior, ecology, genetics, and physiology to determine how species adapt to environmental changes and how diversification of populations leads eventually to the formation of new species. One focus of my group is the amazing Hawaiian Drosophila, which boasts up to 1,000 species in several taxonomic groups. Using genome sequencing and gene expression analyses coupled with detailed behavioral and physiological measurements we have identified genes that are involved in temperature adaptation between two species and between two populations within one species along an environmental gradient. We have also identified genes and epicuticular hydrocarbons that are involved in behavioral reproductive isolation and hybrid sterility between species. Initial studies have begun on the interaction with microbes, (bacteria and yeasts) that are important for food, internal parasites/symbionts, and possibly host-plant associations. In collaboration with others, we are also investigating the genetics of Hawaiian bats and birds, Drosophila melanogaster, the invasive Drosophila suzukii, and Hawaiian Metrosideros trees.

John “Jay” Arnone

My research focuses primarily on understanding the effects of global environmental change (a.k.a. “climate change”) on the functioning and structure of terrestrial ecosystems, and deciphering the underlying ecological mechanisms driving the responses. This includes the study of how rising atmospheric CO2, changes in ambient temperature, interannual climate variability (e.g. anomalously warm years or heat waves), reductions in biological diversity, and large periodic disturbances (e.g. wildfire) affect plant physiological processes, plant growth and survival, plant populations and plant communities, as well as ecosystem processes and feedbacks. Although my interests in ecology are broad, I am particularly keen on understanding how belowground processes are impacted by changing ambient environmental conditions (e.g. fine root dynamics, activity of soil fauna, soil hydrology and root biology). I attempt to bridge traditional ecological disciplines and seek out collaboration with scientists from other disciplines to address these wider-ranging ecological questions.

My research group and I also apply our expertise to directly address real-world environmental questions and challenges for clients such as the U.S. Department of the Interior, Southern Nevada Water Authority, Sempra Energy, American Vanadium, Washoe County Air Quality Management, U.S. Bureau of Reclamation, and the Gas Technology Institute.