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Oak Mortality Patterns in the Midwest U.S.A.

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Rose-Marie Muzika and Randall Morin

Published May 2019 in International Oaks No. 30: 341–348

Abstract

Episodes of oak mortality, primarily associated with oak decline have been documented for at least 40 years in the lower Midwestern United States, particularly the Ozark Mountains physiographic region. In many ways, oak decline and mortality define the mid to late successional Quercus resource in that region and have contributed to successional development patterns. Trends associated with the latter half of the 20th century include dieback, decline, and mortality of Quercus, section Lobatae (Red Oaks). More recently, however, section Quercus (White Oaks) species have experienced mortality in a rapid manner. Etiology of decline and mortality between the two oak sections differs notably. We use a quantitative spatial and temporal analysis of repeated measurement plots to examine patterns in mortality across the region. Periods of Red Oak decline and mortality have been associated with discrete events such as drought years, but site conditions, stand density, and forest age contribute to the observed decline and mortality events. Recent concern and investigation into White Oak mortality reveals an absence of decline, per se, but abrupt mortality on otherwise vigorous individuals and forests. Phytophthora represents the most consistent biotic agent associated with White Oak mortality. This quantitative spatial and temporal indicates the importance of examining region- and subregion- wide mortality in addition to within forest patterns in order to develop hypotheses about current and future mortality and to understand forest change in a broad ecological context.

Keywords

oak decline, Quercus section Quercus, Quercus section Lobatae, forest inventory

References

Bruhn, J.N., J.J. Wetteroff Jr., J.D. Mihail, J.M. Kabrick, and J.B. Pickens. 2000. Distribution of Armillaria species in upland Ozark Mountain forests with respect to site, overstory species composition and oak decline. Forest Pathology 30(1): 43-60. 

Fan, Z., X. Fan, M.K. Crosby, W.K. Moser, H. He, M.A. Spetich, and S.R. Shifley. 2012. Spatio-Temporal Trends of Oak Decline and Mortality under Periodic Regional Drought in the Ozark Highlands of Arkansas and Missouri. Forests 3(3): 614-631. doi:10.3390/f3030614

Haavik, L.J., S.A. Billings, J.M. Guldin, and F.M. Stephen. 2015. Emergent insects, pathogens and drought shape changing patterns in oak decline in North America and Europe. Forest Ecology and Management 354: 190-205. 

Greenberg, C.H., T.L. Keyser, and J.H. Speer. 2011. Temporal patterns of oak mortality in a southern Appalachian forest (1991-2006). Natural Areas Journal 31(2): 131-137.

Manion, P. 1981. Tree disease concepts. Englewood Cliffs, NJ: Prentice Hall.

Nelson, P.W. 2010. The terrestrial natural communities of Missouri. Missouri Department of Conservation.

Pedersen, B.S. 1999. The mortality of midwestern overstory oaks as a bioindicator of environmental stress. Ecological Applications 9(3): 1017-1027.

Reed, S.E., J.E. English, and R.M. Muzika. 2018. Phytophthora species detected in two Ozark forests with unusual patterns of white oak mortality. Plant Disease doi: 10.1094/PDIS-02-18-0253-RE

McNab, W.H., D.T. Cleland, J.A. Freeouf, J.E. Keys, Jr., G.J. Nowacki, and C.A. Carpenter. . 2007. Description of ecological subregions: sections of the conterminous United States. General Technical Report WO-76B 76: 1-82.

Trumbore, S., P. Brando, and H. Hartmann. 2015. Forest health and global change. Science 349 (6250): 814-818. doi:10.1126/science.aac6759

Wood, J.D., B.O. Knapp, R.M. Muzika, M.C. Stambaugh, and L. Gu. 2018. The importance of drought-pathogen interactions in driving oak mortality events in the Ozark Border Region. Environmental Research Letters 13(1): doi:10.1088/1748-9326/aa94fa

Woudenberg, S.W.B.L. Conkling, B.M. O'Connell, E.B. LaPoint, J.A. Turner, and K.L. Waddell..2010. The Forest Inventory and Analysis Database: Database description and users manual version 4.0 for Phase 2. Gen. Tech. Rep. RMRSGTR 245. Fort Collins, CO: US Department of Agriculture, Forest Service, Rocky Mountain Research Station. doi-org.proxy.mul.missouri.edu/10.2737/RMRS-GTR-245