As an eco-physiologist, I am focused on matching physiological variability with genetic diversity of photosynthetic marine algae. Specifically, I am interested in understanding the functional diversity within symbiotic dinoflagellate algae (Symbiodiniaceae) living within the host coral tissue layer and how differences in physiology influence the host’s (coral) response to climate change.
I am also interested in the physiology of free-living algal species and am utilizing a combination of cellular systems-based approaches and high-resolution physiological measurements to study the green algal lineage Micromonas; a group of globally distributed and highly productive picoeukaryotes.
Whether living inhospite within a coral tissue layer or within the open ocean, understanding algal ecophysiology within the context of climate change is the focus of my research.
- Ph.D., Marine Studies, University of Delaware, 2016
- Postdoctoral research: Monterey Bay Aquarium Research Institute
- Postdoctoral research: GEOMAR: Helmholtz Centre for Ocean Research
Visit the Hoadley Lab website here.
Coral symbioses and climate change
Primary productivity and photosynthesis
- Hoadley KD, Poirier CL, Choi CJ, Yung CM, Worden AZ. Coral clearance rates reveal picoplankton selective size barrier. Accepted in Applied and Environmental Microbiology
- Dobson K, S. Levas, V. Schoepf, M. Warner, W. Cai, K.D. Hoadley, X. Yuan, Y. Matsui, T. Melman, and. A. Grottoli. Moderate nutrient concentrations are not detrimental to corals under future ocean conditions. Marine Biology. Vol. 168(98). https://doi.org/10.1007/s00227-021-03901-3
- Hoadley K.D., A. Lewis, D. Wham, D.T. Pettay, C. Grasso, R. Smith, D. Kemp, T. Lajeunesse, and M.E. Warner. Disparity in functional phenotypes among closely-related Cladocopium living in Pacific corals Porites rus and Porites cylindrica from inshore and offshore reefs. Glob Chang Biol. 27(20):5295-5309. https://doi.org/10.1111/gcb.15799
- Wilken, S., C. Yung, M. Hamilton, K. Hoadley, J. Nzongo, C. Eckmann, M. Corrochano Luque, C. Poirier, and A.Z. Worden. Accounting for cell biology in identifying predatory mixotrophs in aquatic environments. Philosophical Transactions B. https://doi.org/10.1098/rstb.2019.0090
- Hoadley, K.D., A. Lewis, D. Wham, D.T. Pettay, C. Grasso, R. Smith, D. Kemp, T. Lajeunesse, M.E. Warner . Specific host–symbiont combinations dictate the response of reef-building corals to thermal stress. Scientific Reports. https://doi.org/10.1038/s41598-019-46412-4
- Yuan X, W.J. Cai, C. Meile, B.M. Hopkinson, Q. Ding, V. Schoepf, M.E. Warner, K.D. Hoadley, B. Chen, S. Liu, H. Huang, Y. Ye, and A.G. Grottoli. Quantitative interpretation of vertical profiles of calcium and pH in the coral coelenteron. Marine Chemistry, 204, 62-69. https://doi.org/10.1016/j.marchem.2018.06.001
- Grottoli A.G., P.D. Martins, M.J. Wilkins, M.D. Johnston, M.E. Warner, W.J. Cai, T.F. Melman, K.D. Hoadley, D.T. Pettay, X. Hu, S. Levas, and V. Schoepf. Coral physiology and microbiome dynamics under combined warming and ocean acidification. PloS one, 13(1). https://doi.org/10.1371/journal.pone.0191156
- Hoadley, K.D., and M.E. Warner. Use of open-source hardware and software platforms to quantify spectrally dependent differences in photochemical efficiency and functional absorption cross-section within the dinoflagellate Symbiodinium spp. Frontiers in Marine Science, Special Issue: Coral Ecophysiology. https://doi.org/10.3389/fmars.2017.00365
- Schoepf V., X. Hu, M. Holcomb, W.J. Cai, Q. Li, Y. Wang, H. Xu, M.E. Warner, T.F. Melman, K.D. Hoadley, D.T. Pettay, Y. Matsui, J.H. Baumann, and A.G. Grottoli. Coral calcification under environmental change: A direct comparison of the alkalinity anomaly and buoyant weight technique. Coral Reefs, 36(1), 13–25. https://doi.org/10.1007/s00338-016-1507-z
- Marsh, A.G., K.D. Hoadley, and M.E. Warner . Distribution of CpG motifs in upstream gene domains in a reef coral and sea anemone: Implications for epigenetics in cnidarians. PLoS One 11(3). https://doi.org/10.1371/journal.pone.0150840
- Russell, B., H. Dierssen, T. Lajeunesse, K.D. Hoadley, M.E. Warner, D.W. Kemp, and T. Bateman . Spectral reflectance of palauan reef-building coral with different symbionts in response to elevated temperature. Remote Sensing, 8(3). https://doi.org/10.3390/rs8030164
- Hoadley, K.D., D.T. Pettay, D. Dodge, and M.E. Warner. Contrasting physiological plasticity in response to environmental stress within different cnidarians and their respective symbionts. Coral Reefs, 35(2), 529–542. https://doi.org/10.1007/s00338-016-1404-5
- Hoadley, K.D., D.T. Pettay, A.G. Grottoli, W. Cai, T.F. Melman, S. Levas, V. Schoepf, X. Hu, Q. Li, H. Xu, Y. Wang, Y. Matsui, J. Baumann, and M.E. Warner. High-temperature acclimation strategies within the thermally tolerant endosymbiont Symbiodinium trenchii and its coral host, Turbinaria reniformis, differ with changing pCO2 and nutrients. Marine Biology, 163(6), 1–13. https://doi.org/10.1007/s00227-016-2909-8
- Hawkins, T.D., J. Hagemeyer, K.D. Hoadley, A.G. Marsh, and M.E. Warner. Partitioning of Respiration in an Animal-Algal Symbiosis: Implications for Different Aerobic Capacity between Symbiodinium spp. Frontiers in Physiology, 128(7). https://doi.org/10.3389/fphys.2016.00128
- Hoadley, K.D. P. Vize, and S.J. Pyott. Current understanding of the molecular mechanisms behind cnidarian behavioral and physiological responses to natural light cycles. In: Goffredo S, Dubinsky Z. (eds) The Cnidaria, Past, Present and Future. Springer, pp511–520.
- Cai, W.J., Y. Ma, B. Hopkinson, A.G. Grottoli, M.E. Warner, Q. Ding, X. Hu, X. Yuan, H. Xu, C. Han, V. Schoepf, T. Melman, K.D. Hoadley, D.T. Pettay, Y. Matsui, J.H. Baumann, S. Levas, Y. Ying, and Y. Wang. Microelectrode characterization of coral interior pH and carbonate chemistry. Nature Communications, (7). https://doi.org/10.1038/ncomms11144
- Hoadley, K.D., D.T. Pettay, A.G. Grottoli, W. Cai, T.F. Melman, V. Schoepf, X. Hu, Q. Li, H. Xu, Y. Wang, Y. Matsui, J. Baumann, and M.E. Warner. Physiological response to elevated temperature and pCO2 varies across four Pacific coral species: Understanding the unique host+symbiont response. Scientific Reports, https://doi.org/10.1038/srep18371
- Hoadley, K.D., D. Rollison, D.T. Pettay, and M.E. Warner. Differential carbon utilization and asexual reproduction under elevated pCO2 conditions in the model anemone, Exaiptasia pallida, hosting different symbionts. Limnology and Oceanography, Volume 60, Issue 6 p. 2108-2120. https://doi.org/10.1002/lno.10160
- Leal, M.C., K.D. Hoadley, D.T. Pettay, A. Grajales, R. Calado, and M.E. Warner. Symbiont type influences trophic plasticity of a model cnidarian-algal symbiosis. Journal of Experimental Biology, 218(6), 858-863. https://doi.org/10.1242/jeb.115519
- Tilney, C., K.D. Hoadley, and M.E. Warner. Comparing the diel vertical migration of Karlodinium veneficum (dinophyceae) and Chattonella subsalsa (Raphidophyceae): PSII photochemistry, circadian control, and carbon assimilation. Journal of Photochemistry and Photobiology B: Biology, 143, 107–119. https://doi.org/10.1016/j.jphotobiol.2014.12.023
- Levas, S., A.G. Grottoli, M.E. Warner, W. Cai, J. Bauer, V. Schoepf, J.H. Baumann, Y. Matsui, C. Gearing, T.F. Melman, K.D. Hoadley, D.T. Pettay, X. Hu, Q. Li, H. Xu, and Y. Wang. Organic Carbon Fluxes Mediated by Corals at Elevated pCO2 and Temperature. Marine Ecology Progress Series, 519:153-164. https://doi.org/10.3354/meps11072
- Schoepf, V., A.G. Grottoli, M.E. Warner, W-J. Cai, T.F. Melman, K.D. Hoadley, D.T. Pettay, X. Hu, Q. Li, H. Xu, Y. Wang, Y. Matsui, and J.H. Baumann. Coral energy reserves and calcification in a high-CO2 world at two temperatures. PLoS One, 8(10), https://doi.org/10.1371/journal.pone.0075049
- Hoadley, K.D., A. Szmant, and S. Pyott. Circadian clock gene expression in the coral Favia fragum over diel and lunar reproductive cycles. PLoS One, 6(5), https://doi.org/10.1371/journal.pone.0019755