Dr. Krause earned a Bachelor's of Science degree 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 migrant 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 which is affiliated with the University of Edinburgh in Scotland was funded in 2016. 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.
Dr. Krause is classically trained as a physiologist although his interests have broadened over the past several years 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 any one discipline within biology is not independent from another. For instance, 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, reproduction, and the interface between these two systems 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.
- Courses taught
- BIOL316: Comparative Animal Physiology
- BIOL396: Comparative Animal Physiology Laboratory
- BIOL414/614: Endocrinology
- Ph.D, University of California, Davis, Molecular, Cellular and Integrative Physiology, 2014
- BS, Sonoma State University, 2007
- Krause J.S., et al. Weathering the storm: Arctic blizzards affect stress physiology and body condition in breeding songbirds.General and Comparative Endocrinology 2018, 267, 183-192.
- Wingfield J.C., Pérez J.H., Krause J.S.,et al. How birds cope with extreme climatic events. Philosophical Transactions of the Royal Society B: Biological Sciences, 2017 372.
- Krause J.S., Pérez J.H., Meddle S.L., & Wingfield J.C. Effects of short and long-term fasting on hypothalamic-pituitary-adrenal axis function, body condition, and activity in wintering white-crowned sparrows. Physiology and Behavior 2017 177, 282-290.
- Krause J.S., et al. The effects of extreme spring weather on body condition and stress physiology in arctic-breeding songbirds. General and Comparative Endocrinology 2016 (237) 10-18.
- Krause J.S., et al. The stress response is attenuated during inclement weather in parental, but not in pre-parental, Lapland longspurs (Calcarius lapponicus) breeding in the Low Arctic. Hormones and Behavior 2016 83:68-74.
- Perez J.H., Krause J.S., et al. Nestling growth rates in relation to food abundance and weather in the Arctic. Auk 2016 133 (2):261-272
- Krause J.S., et al. A comparison of hematocrit in two subspecies of white-crowned sparrows: A migrant and a resident. Physiological and Biochemical Zoology 2016 89 (1): 51-60.
- Krause J.S., et al. Adrenocortical responses to stress on the leading edge of a northward range expansion in arctic-breeding Gambel's White-crowned sparrow. Oecologia 2015 180 (1) 33-44.
- Krause J. S., S. L. Meddle, and J. C. Wingfield. The Effects of Acute Restraint Stress on Plasma Levels of Prolactin and Corticosterone across Life-History Stages in a Short-Lived Bird: Gambel's White-Crowned Sparrow (Zonotrichia leucophrys gambelii). Physiological and Biochemical Zoology 2015 (88) 589-598.
- Krause J.S., McGuigan M.A., Wingfield J.C., & Meddle S.L. Decreases in mineralocorticoid but not glucocorticoid receptor mRNA expression during the short arctic breeding season in free-living Gambel's white-crowned sparrow (Zonotrichia leucophrys gambelii). Journal of Neuroendocrinology, 2015. 27(1): 66-75