Tree mortality and biomass loss in drought-affected forests of East Texas, USA

Abstract

Changes in tree mortality due to severe drought can alter forest structure, composition, dynamics, ecosystem services, carbon fluxes, and energy interactions between the atmosphere and land surfaces. We utilized long-term (2000‒2017, 3 full inventory cycles) Forest Inventory and Analysis (FIA) data to examine tree mortality and biomass loss in drought-affected forests for East Texas, USA. Plots that experienced six or more years of droughts during those censuses were selected based on 12-month moderate drought severity [Standardized Precipitation Evaporation Index (SPEI) -1.0]. Plots that experienced other disturbances and inconsistent records were excluded from the analysis. In total, 222 plots were retained from nearly 4000 plots. Generalized nonlinear mixed models (GNMMs) were used to examine the changes in tree mortality and recruitment rates for selected plots. The results showed that tree mortality rates and biomass loss to mortality increased overall, and across tree sizes, dominant genera, height classes, and ecoregions. An average mortality rate of 5.89% year⁻¹ during the study period could be incited by water stress created by the regional prolonged and episodic drought events. The overall plot and species-group level recruitment rates decreased during the study period. Forest mortality showed mixed results regarding basal area and forest density using all plots together and when analyzed the plots by stand origin and ecoregion. Higher mortality rates of smaller trees were detected and were likely compounded by density-dependent factors. Comparative analysis of drought-induced tree mortality using hydro-meteorological data along with drought severity and length gradient is suggested to better understand the effects of drought on tree mortality and biomass loss around and beyond East Texas in the southeastern United States.

Keywords

Generalized nonlinear mixed model / Endogenous factors / Drought index / Standardized precipitation evaporation index (SPEI) / Above-ground biomass / Competition index / Biomass lost to mortality / East Texas

References

[1] Adams HD, Guardiola-Claramonte M, Barron-Gafford GA Temperature sensitivity of drought-induced tree mortality portends increased regional die-off under global-change-type drought. Proc Natl Acad Sci, 2009, 106: 7063-7066.

[2] Adams HD, Germino MJ, Breshears DD Nonstructural leaf carbohydrate dynamics of Pinus edulis during drought-induced tree mortality reveal role for carbon metabolism in mortality mechanism. New Phytol, 2013, 197: 1142-1151.

[3] Allen CD, Macalady AK, Chenchouni H A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests. For Ecol Manage, 2010, 259: 660-684.

[4] Baguskas SA, Peterson SH, Bookhagen B, Still CJ. Evaluating spatial patterns of drought-induced tree mortality in a coastal California pine forest. For Ecol Manage, 2014, 315: 43-53.

[5] Barber B Billings R Boggus T et al (2009) Texas statewide assessment of forest resources. Texas A&M Forest Service

[6] Bennett AC, Mcdowell NG, Allen CD, Anderson-Teixeira KJ. Larger trees suffer most during drought in forests worldwide. Nat Plants, 2015, 1: 1-5.

[7] Bernal M, Estiarte M, Peñuelas J. Drought advances spring growth phenology of the Mediterranean shrub Erica multiflora. Plant Biol, 2011, 13: 252-257.

[8] Bigler C, Bugmann H. Predicting the time of tree death using dendrochronological data. Ecol Appl, 2004, 14: 902-914.

[9] Bigler C, Gavin DG, Gunning C, Veblen TT. Drought induces lagged tree mortality in a subalpine forest in the Rocky Mountains. Oikos, 2007, 116: 1983-1994.

[10] Brien MJO, Leuzinger S, Philipson CD Drought survival of tropical tree seedlings enhanced by non-structural carbohydrate levels. Nat Clim Chang, 2014, 4: 710-714.

[11] Carnicer J, Coll M, Ninyerola M Widespread crown condition decline, food web disruption, and amplified tree mortality with increased climate change-type drought. Proc Natl Acad Sci, 2011, 108: 1474-1478.

[12] Chao KJ, Phillips OL, Gloor E Growth and wood density predict tree mortality in Amazon forests. J Ecol, 2008, 96: 281-292.

[13] Clark JS, Bell DM, Hersh MH, Nichols L. Climate change vulnerability of forest biodiversity: climate and competition tracking of demographic rates. Glob Chang Biol, 2011, 17: 1834-1849.

[14] Clark JS, Iverson L, Woodall CW The impacts of increasing drought on forest dynamics, structure, and biodiversity in the United States. Glob Chang Biol, 2016

[15] Colangelo M, Camarero JJ, Borghetti M Size matters a lot: drought-affected Italian oaks are smaller and show lower growth prior to tree death. Front Plant Sci, 2017, 8: 1-14.

[16] Cooper JA, Bentley JW (2012) East Texas, 2011 forest inventory and analysis factsheet. e-Science Updat SRS-052 5

[17] Crosby M, Fan Z, Spetich M, et al (2012) Relationship between crown dieback and drought in the Southeastern United States. In: Morin Randall S, Liknes, Greg C Proc 2012 FIA Symposium from status to trends pp 316–318

[18] Crosby MK, Fan Z, Spetich MA Early indications of drought impacts on forests in the southeastern United States. For Chron, 2015, 91: 376-383.

[19] da Costa ACL, Galbraith D, Almeida S Effect of 7 yr of experimental drought on vegetation dynamics and biomass storage of an eastern Amazonian rainforest. New Phytol, 2010, 187: 579-591.

[20] Deligöz A, Cankara FG. Differences in physiological and biochemical responses to summer drought of Pinus nigra subsp. pallasiana and Pinus brutia in a natural mixed stand. J For Res, 2019

[21] Desprez-Loustau M-L, Marçais B, Nageleisen L-M Interactive effects of drought and pathogens in forest trees. Ann For Sci, 2006, 63: 597-612.

[22] Dooley KJW. Forests of east Texas, 2016, 2018, Asheville: U.S. Department of Agriculture Forest Service, Southern Research Station, Asheville, NC

[23] Edgar CB, Westfall JA, Klockow PA Interpreting effects of multiple, large-scale disturbances using national forest inventory data: a case study of standing dead trees in east Texas, USA. For Ecol Manage, 2019, 437: 27-40.

[24] Elkin C, Giuggiola A, Rigling A, Bugmann H. Short-and long-term efficacy of forest thinning to mitigate drought impacts in mountain forests in the European Alps. Ecol Appl, 2015, 25: 1083-1098.

[25] Engelbrecht BMJ, Comita LS, Condit R Drought sensitivity shapes species distribution patterns in tropical forests. Nature, 2007, 447: 80-83.

[26] EPA (2012) Level III Ecoregions of Texas. In: Corvallis OR ftp://ftp.epa.gov/wed/ecoregions/tx/tx_eco_l3.zip, http://edg.epa.gov. Accessed 4 July 2015

[27] Frank D, Reichstein M, Bahn M Effects of climate extremes on the terrestrial carbon cycle: concepts, processes and potential future impacts. Glob Chang Biol, 2015

[28] Franklin JF, Shugart HH, Harmon ME. Tree death as an ecological process: the causes, consequences, and variability of tree mortality. Bioscience, 1987, 37: 550-556.

[29] Franklin JF, Spies TA, Van Pelt R Disturbances and structural development of natural forest ecosystems with silvicultural implications, using Douglas-fir forests as an example. For Ecol Manage, 2002, 155: 399-423.

[30] Free CM, Matthew Landis R, Grogan J Management implications of long-term tree growth and mortality rates: a modeling study of big-leaf mahogany (Swietenia macrophylla) in the Brazilian amazon. For Ecol Manage, 2014, 330: 46-54.

[31] Fridley JD, Wright JP. Drivers of secondary succession rates across temperate latitudes of the Eastern USA: climate, soils, and species pools. Oecologia, 2012, 168: 1069-1077.

[32] Frolking S, Palace MW, Clark DB Forest disturbance and recovery: a general review in the context of space borne remote sensing of impacts on aboveground biomass and canopy structure. J Geophys Res Biogeosci, 2009, 114: 1-27.

[33] Ganey JL, Vojta SC. Tree mortality in drought-stressed mixed-conifer and ponderosa pine forests, Arizona, USA. For Ecol Manage, 2011, 261: 162-168.

[34] Gea-Izquierdo G, Viguera B, Cabrera M, Cañellas I. Drought induced decline could portend widespread pine mortality at the xeric ecotone in managed mediterranean pine–oak woodlands. For Ecol Manage, 2014, 320: 70-82.

[35] Giuggiola A, Bugmann H, Zingg A Reduction of stand density increases drought resistance in xeric Scots pine forests. For Ecol Manage, 2013, 310: 827-835.

[36] Grogan J, Landis RM, Free CM Big-leaf mahogany Swietenia macrophylla population dynamics and implications for sustainable management. J Appl Ecol, 2014, 51: 664-674.

[37] Grote R, Kiese R, Grünwald T Modelling forest carbon balances considering tree mortality and removal. Agric For Meteorol, 2011, 151: 179-190.

[38] Guarín A, Taylor AH. Drought triggered tree mortality in mixed conifer forests in Yosemite National Park, California, USA. For Ecol Manage, 2005, 218: 229-244.

[39] Gustafson EJ, Shinneman douglas J (2015) Approaches to modeling landscape-scale drought-induced forest mortality. In: Perera AH et al (ed) Modeling of forest landscape disturbances. Springer International publishing, Switzerland, pp 1–321

[40] Gustafson EJ, Sturtevant BR. Modeling forest mortality caused by drought stress: implications for climate change. Ecosystems, 2013, 16: 60-74.

[41] Halofsky JE, Hemstrom MA, Conklin DR Assessing potential climate change effects on vegetation using a linked model approach. Ecol Modell, 2013, 266: 131-143.

[42] Hanna P, Kulakowski D. The influences of climate on aspen dieback. For Ecol Manage, 2012, 274: 91-98.

[43] Huang L, McDonald-Buller EC, McGaughey G Annual variability in leaf area index and isoprene and monoterpene emissions during drought years in Texas. Atmos Environ, 2014, 92: 240-249.

[44] Huang L, He B, Chen A Drought dominates the interannual variability in global terrestrial net primary production by controlling semi-arid ecosystems. Sci Rep, 2016, 6: 1-7.

[45] Hurteau MD, Bradford JB, Fulé PZ Climate change, fire management, and ecological services in the southwestern US. For Ecol Manage, 2013, 327: 280-289.

[46] IPCC (2013) Summary for policymakers. In: climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. p 33

[47] Keller F, Lischke H, Mathis T Effects of climate, fire, and humans on forest dynamics: forest simulations compared to the palaeological record. Ecol Modell, 2002, 152: 109-127.

[48] Klockow PA, Vogel JG, Edgar CB, Moore GW. Lagged mortality among tree species four years after an exceptional drought in east Texas. Ecosphere, 2018, 9: 1-14.

[49] Klos RJ, Wang GG, Bauerle WL, Rieck JR. Drought impact on forest growth and mortality in the southeast USA: an analysis using forest health and monitoring data. Ecol Appl, 2009, 19: 699-708.

[50] Lewis SL, Phillips OL, Sheil D Tropical forest tree mortality, recruitment and turnover rates: calculation, interpretation and comparison when census intervals vary. J Ecol, 2004, 92: 929-944.

[51] Liang G, Bu J, Zhang S Effects of drought stress on the photosynthetic physiological parameters of Populus × euramericana “Neva”. J For Res, 2019, 30: 409-416.

[52] Lindner M, Maroschek M, Netherer S Climate change impacts, adaptive capacity, and vulnerability of European forest ecosystems. For Ecol Manage, 2010, 259: 698-709.

[53] Luo Y, Chen HYH. Observations from old forests underestimate climate change effects on tree mortality. Nat Commun, 2013, 4: 1655.

[54] McDowell NG, Sevanto S. The mechanisms of carbon starvation: how, when, or does it even occur at all?. New Phytol, 2010, 186: 264-266.

[55] McDowell N, Pockman WT, Allen CD Mechanisms of plant survival and mortality during drought: Why do some plants survive while others succumb to drought?. New Phytol, 2008, 178: 719-739.

[56] Mencuccini M, Martínez-Vilalta J, Vanderklein D Size-mediated ageing reduces vigour in trees. Ecol Lett, 2005, 8: 1183-1190.

[57] Misson L, Degueldre D, Collin C Phenological responses to extreme droughts in a Mediterranean forest. Glob Chang Biol, 2011, 17: 1036-1048.

[58] Mitchell PJ, O’Grady AP, Hayes KR, Pinkard EA. Exposure of trees to drought-induced die-off is defined by a common climatic threshold across different vegetation types. Ecol Evol, 2014, 4: 1088-1101.

[59] Moorcroft APR, Hurtt GC, Pacala SW A method for scaling vegetation dynamics:  the ecosystem demography model (ED). Ecol Monogr, 2001, 71: 557-585.

[60] Moore GW, Edgar CB, Vogel J Tree mortality from an exceptional drought spanning mesic to semiarid ecoregions. Ecol Appl, 2016, 26: 602-611.

[61] Morin RS, Randolph KDC, Steinman J. Mortality rates associated with crown health for eastern forest tree species. Environ Monit Assess, 2015, 187: 1-11.

[62] Mou YM, Fang O, Cheng X, Qiu H. Recent tree growth decline unprecedented over the last four centuries in a Tibetan juniper forest. J For Res, 2018, 30: 1429-1436.

[63] Nielsen-Gammon JW. Schmandt J, North GR, Clarkson J. The changing climate of Texas. The impact of global warming on texas, second, 2011, Austin: University of Texas Press 39 68

[64] O’Connell BM, LaPoint EB, Turner JA, et al (2015) The forest inventory and analysis database: database description and user guide for phase 2 (version 6.0.2)

[65] Pataki DE, Oren R, Phillips N. Responses of sap flux and stomatal conductance of Pinus taeda trees to stepwise reductions in leaf area. J Exp Bot, 1998, 49: 871-878.

[66] Peng C, Ma Z, Lei X A drought-induced pervasive increase in tree mortality across Canada’s boreal forests. Nat Clim Chang, 2011, 1: 467-471.

[67] Phillips NG, Ryan MG, Bond BJ Reliance on stored water increases with tree size in three species in the Pacific Northwest. Tree Physiol, 2003, 23: 237-245.

[68] Phillips OL, Aragao LEOC, Lewis SL Drought sensitivity of the amazon rainforest. Science, 2009, 323: 1344-1347.

[69] Prado-Junior JA, Schiavini I, Vale VS Functional traits shape size-dependent growth and mortality rates of dry forest tree species. J Plant Ecol, 2016, 10: 895-906.

[70] Rowland L, da Costa ACL, Galbraith DR Death from drought in tropical forests is triggered by hydraulics not carbon starvation. Nature, 2015, 528: 119-122.

[71] Sala A, Piper F, Hoch G. Physiological mechanisms of drought-induced tree mortality are far from being resolved. New Phytol, 2010, 186: 274-281.

[72] Saud P, Lynch TB, Guldin JM (2016) Twenty five years long survival analysis of an individual shortleaf pine trees. In: Schweitzer Callie J, Clatterbuck Wayne K, Oswalt CM (ed) Proceedings of the 18th biennial southern silvicultural research conference; 2015 March 2–5; Knoxville, TN. e-Gen. Tech. Rep. SRS-212. Asheville, NC: US Department of Agriculture, Forest Service, Southern Research Station. pp 555–557

[73] Saud P, Lynch TB, Cram DS, Guldin JM. An annual basal area growth model with multiplicative climate modifier fitted to longitudinal data for shortleaf pine. For Int J For Res, 2019

[74] Scholz FG, Phillips NG, Bucci SJ Meinzer F, Lachenbruch B, Dawson TE Hydraulic capacitance: biophysics and functional significance of internal water sources in relation to tree size. Size-and age-related changes in tree structure and function, 2011, Berlin: Springer 341 361

[75] Seidl R, Rammer W, Scheller RM, Spies TA. An individual-based process model to simulate landscape-scale forest ecosystem dynamics. Ecol Modell, 2012, 231: 87-100.

[76] Shaw JD (2015) An evaluation of FIA’s stand age variable. In: Stanton SM, Christensen GA comps (eds) Pushing boundaries: new directions in inventory techniques and applications: forest inventory and analysis (FIA) symposium 2015. Portland, Oregon. Gen. Tech. Rep. PNW-GTR-931. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, Oregon, p 57

[77] Sheil D, Burslem DFRP, Alder D. The interpretation and misinterpretation of mortality rate measures. J Ecol, 1995, 83: 331-333.

[78] Sileshi G. The excess-zero problem in soil animal count data and choice of appropriate models for statistical inference. Pedobiologia (Jena), 2008, 52: 1-17.

[79] Slik JWF. El Niño droughts and their effects on tree species composition and diversity in tropical rain forests. Oecologia, 2004, 141: 114-120.

[80] Sohngen B, Tian X. Global climate change impacts on forests and markets. For Policy Econ, 2016, 72: 18-26.

[81] Stone JE, Kolb TE, Covington WW. Effects of restoration thinning on presettlement in Northern Arizona. Restor Ecol, 2002, 7: 172-182.

[82] Stone C, Penman T, Turner R. Managing drought-induced mortality in Pinus radiata plantations under climate change conditions: a local approach using digital camera data. For Ecol Manage, 2012, 265: 94-101.

[83] Subedi MR (2016) Evaluating geospatial distribution of drought, drought-induced tree mortality and biomass loss in east Texas, USA. MS Thesis, Texas A&M University-Kingsville, Kingsville, Texas

[84] Subedi MR, Xi W, Edgar CB Assessment of geostatistical methods for spatiotemporal analysis of drought patterns in East Texas, USA. Spat Inf Res, 2018, 27: 11-21.

[85] Taeger S, Zang C, Liesebach M Impact of climate and drought events on the growth of Scots pine (Pinus sylvestris L.) provenances. For Ecol Manage, 2013, 307: 30-42.

[86] Van Gunst KJ, Weisberg PJ, Yang J, Fan Y. Do denser forests have greater risk of tree mortality: a remote sensing analysis of density-dependent forest mortality. For Ecol Manage, 2016, 359: 19-32.

[87] van Mantgem PJ, Stephenson NL. Apparent climatically induced increase of tree mortality rates in a temperate forest. Ecol Lett, 2007, 10: 909-916.

[88] van Mantgem PJ, Stephenson NL, Byrne JC Widespread increase of tree mortality rates in the western United States. Science, 2009, 323: 521-524.

[89] Vose J, Peterson D, Patel-Weynand T (2012) Effects of climatic variability and change on forest ecosystems : a comprehensive science synthesis for the U.S. forest sector. US Dep Agric 265

[90] Vose JM, Clark JS, Luce CH. Introduction to drought and US forests: impacts and potential management responses. For Ecol Manage, 2016, 380: 296-298.

[91] Wang W, Peng C, Kneeshaw DD Drought-induced tree mortality: ecological consequences, causes, and modeling. Environ Rev, 2012, 20: 109-121.

[92] Waring EF, Schwilk DW. Plant dieback under exceptional drought driven by elevation, not by plant traits, in Big Bend National Park, Texas, USA. PeerJ, 2014, 2: 1-15.

[93] Weemstra M, Eilmann B, Sass-Klaassen UGW, Sterck FJ. Summer droughts limit tree growth across 10 temperate species on a productive forest site. For Ecol Manage, 2013, 306: 142-149.

[94] Wiken E, Franscisco JN, Glenn G. North American terrestrial ecoregions—level III, 2011, Montreal: Commission for Environmental Cooperation.

[95] Williams AP, Allen CD, Millar CI Forest responses to increasing aridity and warmth in the southwestern United States. Proc Natl Acad Sci U S A, 2010, 107: 21289-21294.

[96] Williams CA, Collatz GJ, Masek J Impacts of disturbance history on forest carbon stocks and fluxes: merging satellite disturbance mapping with forest inventory data in a carbon cycle model framework. Remote Sens Environ, 2013, 151: 57-71.

[97] Xi W (2005) Forest response to natural disturbance: change in structure and diversity on a North Carolina Piedmont forest in response to catastrophic wind events. University of North Carolina at Chapel Hill

[98] Xi WM, Peet RK, Urban DL. Changes in forest structure, species diversity and spatial pattern following hurricane disturbance in a Piedmont North Carolina forest, USA. J Plant Ecol, 2008, 1: 43-57.

[99] Zens MS, Peart DR. Dealing with death data: individual hazards, mortality and bias. Trends Ecol Evol, 2003, 18: 366-373.

[100] Zeppel MJB, Anderegg WRL, Adams HD. Forest mortality due to drought: latest insights, evidence and unresolved questions on physiological pathways and consequences of tree death. New Phytol, 2013, 197: 372-374.

[101] Zhang J, Luguang J, Zhiming F, Peng L. Detecting effects of the recent drought on vegetation in Southwestern China. J Resour Ecol, 2012, 3: 43-49.

[102] Zhang X, Lei Y, Pang Y Tree mortality in response to climate change induced drought across Beijing, China. Clim Change, 2014, 124: 179-190.

[103] Zhao M, Running SW. Drought-induced reduction in global terrestrial net primary production from 2000 through 2009. Science, 2010, 329: 940-943.