Beguería, S., Vicente-Serrano, S. M., Reig, F., and Latorre, B.: Standardized precipitation evapotranspiration index (SPEI) revisited: parameter fitting, evapotranspiration models, tools, datasets and drought monitoring, Int. J. Climatol., 34, 3001–3023, https://doi.org/10.1002/joc.3887, 2014.
Belmonte, A., Ts. Sankey, T., Biederman, J., Bradford, J. B., and Kolb, T.: Soil moisture response to seasonal drought conditions and post-thinning forest structure, Ecohydrology, 15, e2406, https://doi.org/10.1002/eco.2406, 2022.
Brinkmann, N., Seeger, S., Weiler, M., Buchmann, N., Eugster, W., and Kahmen, A.: Employing stable isotopes to determine the residence times of soil water and the temporal origin of water taken up by Fagus sylvatica and Picea abies in a temperate forest, New Phytol., 219, 1300–1313, 2018.
Brinkmann, N., Eugster, W., Buchmann, N., and Kahmen, A.: Species-specific differences in water uptake depth of mature temperate trees vary with water availability in the soil, Plant Biol., 21, 71–81, https://doi.org/10.1111/plb.12907, 2019.
Chillakuru, D. R.: Towards locating and quantifying rrepiration in the soil and in the plant using a novel 18-oxygen labelling technique, MSc Thesis, University of British Columbia, https://doi.org/10.14288/1.0058469, 2009.
Creed, I. F., Spargo, A. T., Jones, J. A., Buttle, J. M., Adams, M. B., Beall, F. D., Booth, E. G., Campbell, J. L., Clow, D., Elder, K., Green, M. B., Grimm, N. B., Miniat, C., Ramlal, P., Saha, A., Sebestyen, S., Spittlehouse, D., Sterling, S., Williams, M. W., Winkler, R., and Yao, H.: Changing forest water yields in response to climate warming: results from long-term experimenta
l watershed sites across North America, Global Change Biol., 20, 3191–3208, https://doi.org/10.1111/gcb.12615, 2014.
Dawson, T. E.: Determining water use by trees and forests from isotopic, energy balance and transpiration analyses: the roles of tree size and hydraulic lift, Tree Physiol., 16, 263–272, https://doi.org/10.1093/treephys/16.1-2.263, 1996.
Ehleringer, J. R., Phillips, S. L., Schuster, W. S. F., and Sandquist, D. R.: Differential utilization of summer rains by desert plants, Oecologia, 88, 430–434, https://doi.org/10.1007/BF00317589, 1991.
Ellis, E. C.: emory-ce/LodgepolePineWaterUseStrategies2021: Seasonal shifts in the depth-to-water uptake by young thinned and overstocked lodgepole pine (Pinus contorta) forests under drought conditions in the Okanagan Valley, British Columbia, Canada (Version v1), Zenodo [code and data set], https://doi.org/10.5281/zenodo.13975471, 2024.
Evaristo, J., Jasechko, S., and McDonnell, J. J.: Global separation of plant transpiration from groundwater and streamflow, Nature, 525, 91–94, https://doi.org/10.1038/nature14983, 2015.
Fernandes, T. J. G., Del Campo, A. D., Herrera, R., and Molina, A. J.: Simultaneous assessment, through sap flow and stable isotopes, of water use efficiency (WUE) in thinned pines shows improvement in growth, tree-climate sensitivity and WUE, but not in WUEi, Forest Ecol. Manage., 361, 298–308, https://doi.org/10.1016/j.foreco.2015.11.029, 2016.
Flanagan, L. B. and Ehleringer, J. R.: Stable Isotope Composition of Stem and Leaf Water: Applications to the Study of Plant Water Use, Funct. Ecol., 5, 270–277, https://doi.org/10.2307/2389264, 1991.
Flint, A. L. and Childs, S. W.: Use of the Priestley-Taylor evaporation equation for soil water limited conditions in a small forest clearcut, Agr. Forest Meteorol., 56, 247–260, https://doi.org/10.1016/0168-1923(91)90094-7, 1991.
Gibson, J. J. and Edwards, T. W. D.: Regional water balance trends and evaporation-transpiration partitioning from a stable isotope survey of lakes in northern Canada, Global Biogeochem. Cy., 16, 10-1–10-14, https://doi.org/10.1029/2001GB001839, 2002.
Giles-Hansen, K., Wei, X., and Hou, Y.: Dramatic increase in water use efficiency with cumulative forest disturbance at the large forested watershed scale, Carb. Balance Manage., 16, 6, https://doi.org/10.1186/s13021-021-00169-4, 2021.
Giuggiola, A., Ogée, J., Rigling, A., Gessler, A., Bugmann, H., and Treydte, K.: Improvement of water and light availability after thinning at a xeric site: which matters more? A dual isotope approach, New Phytol., 210, 108–121, https://doi.org/10.1111/nph.13748, 2016.
Grossiord, C., Sevanto, S., Dawson, T. E., Adams, H. D., Collins, A. D., Dickman, L. T., Newman, B. D., Stockton, E. A., and McDowell, N. G.: Warming combined with more extreme precipitation regimes modifies the water sources used by trees, New Phytol., 213, 584–596, 2017.
Halter, M. R. and Chanway, C. P.: Growth and root morphology of planted and naturally-regenerated Douglas fir and Lodgepole pine, Ann. Forest Sci., 50, 71–77, https://doi.org/10.1051/forest:19930105, 1993.
Hope, G. D.: Clearcut harvesting effects on soil and creek inorganic nitrogen in high elevation forests of southern interior British Columbia, Can. J. Soil Sci., 89, 35–44, https://doi.org/10.4141/CJSS06032, 2011.
Kerhoulas, L. P., Koch, G. W., and Kolb, T. E.: Tree size, stand density, and the source of water used across seasons by ponderosa pine in northern Arizona, Forest Ecol. Manage., 289, 425–433, https://doi.org/10.1016/j.foreco.2012.10.036, 2013.
Kleine, L., Tetzlaff, D., Smith, A., Wang, H., and Soulsby, C.: Using water stable isotopes to understand evaporation, moisture stress, and re-wetting in catchment forest and grassland soils of the summer drought of 2018, Hydrol. Earth Syst. Sci., 24, 3737–3752, https://doi.org/10.5194/hess-24-3737-2020, 2020.
Langs, L. E., Petrone, R. M., and Pomeroy, J. W.: A
δ18O and
δ2H stable water isotope analysis of subalpine forest water sources under seasonal and hydrological stress in the Canadian Rocky Mountains, Hydrol. Process., 34, 5642–5658, https://doi.org/10.1002/hyp.13986, 2020.
Lin, G. and Sternberg, da S. L. L.: 31 – Hydrogen Isotopic Fractionation by Plant Roots during Water Uptake in Coastal Wetland Plants, in: Stable Isotopes and Plant Carbon-water Relations, edited by: Ehleringer, J. R., Hall, A. E., and Farquhar, G. D., Academic Press, San Diego, 497–510, https://doi.org/10.1016/B978-0-08-091801-3.50041-6, 1993.
Liu, S., Chen, Y., Chen, Y., Friedman, J. M., Hati, J. H. A., and Fang, G.: Use of
2H and
18O stable isotopes to investigate water sources for different ages of Populus euphratica along the lower Heihe River, Ecol. Res., 30, 581–587, https://doi.org/10.1007/s11284-015-1270-6, 2015.
Liu, X., Silins, U., Lieffers, V. J., and Man, R.: Stem hydraulic properties and growth in lodgepole pine stands following thinning and sway treatment, Can. J. Forest Res., 33, 1295–1303, https://doi.org/10.1139/x03-061, 2011.
Maier, C. A., Burley, J., Cook, R., Ghezehei, S. B., Hazel, D. W., and Nichols, E. G.: Tree water use, water use efficiency, and carbon isotope discrimination in relation to growth potential in Populus deltoides and hybrids under field conditions, Forests, 10, 993, https://doi.org/10.3390/f10110993, 2019.
Manrique-Alba, À., Beguería, S., Molina, A. J., González-Sanchis, M., Tomàs-Burguera, M., del Campo, A. D., Colangelo, M., and Camarero, J. J.: Long-term thinning effects on tree growth, drought response and water use efficiency at two Aleppo pine plantations in Spain, Sci. Total Environ., 728, 138536, https://doi.org/10.1016/j.scitotenv.2020.138536, 2020.
Meinzer, F. C., Clearwater, M. J., and Goldstein, G.: Water transport in trees: current perspectives, new insights and some controversies, Environ. Exp. Bot., 45, 239–262, https://doi.org/10.1016/S0098-8472(01)00074-0, 2001.
Meinzer, F. C., Warren, J. M., and Brooks, J. R.: Species-specific partitioning of soil water resources in an old-growth Douglas-fir–western hemlock forest, Tree Physiol., 27, 871–880, https://doi.org/10.1093/treephys/27.6.871, 2007.
Meinzer, F. C., Woodruff, D. R., Eissenstat, D. M., Lin, H. S., Adams, T. S., and McCulloh, K. A.: Above- and belowground controls on water use by trees of different wood types in an eastern US deciduous forest, Tree Physiol., 33, 345–356, https://doi.org/10.1093/treephys/tpt012, 2013.
Molina, A., Vanacker, V., Balthazar, V., Mora, D., and Govers, G.: Complex land cover change, water and sediment yield in a degraded Andean environment, J. Hydrol., 472–473, 25–35, https://doi.org/10.1016/j.jhydrol.2012.09.012, 2012.
Moore, R. D. and Wondzell, S. M.: Physical Hydrology and the Effects of Forest Harvesting in the Pacific Northwest: A Review1, J. Am. Water Resour. Assoc., 41, 763–784, https://doi.org/10.1111/j.1752-1688.2005.tb03770.x, 2005.
Moore, R. D., Allen, D., MacKenzie, L., Spittlehouse, D., and Winkler, R.: Data sets for the Upper Penticton Creek watershed experiment: A paired-catchment study to support investigations of watershed response to forest dynamics and climatic variability in an inland snow-dominated region, Hydrol. Process., 35, e14391, https://doi.org/10.1002/hyp.14391, 2021.
Moreno-Gutiérrez, C., Barberá, G. G., Nicolás, E., De Luis, M., Castillo, V. M., Martínez-Fernández, F., and Querejeta, J. I.: Leaf
δ18O of remaining trees is affected by thinning intensity in a semiarid pine forest, Plant Cell Environ., 34, 1009–1019, https://doi.org/10.1111/j.1365-3040.2011.02300.x, 2011.
Navarro-Cerrillo, R. M., Sánchez-Salguero, R., Rodriguez, C., Duque Lazo, J., Moreno-Rojas, J. M., Palacios-Rodriguez, G., and Camarero, J. J.: Is thinning an alternative when trees could die in response to drought? The case of planted Pinus nigra and P. Sylvestris stands in southern Spain, Forest Ecol. Manage., 433, 313–324, https://doi.org/10.1016/j.foreco.2018.11.006, 2019.
Ogle, K., Tucker, C., and Cable, J. M.: Beyond simple linear mixing models: Process-based isotope partitioning of ecological processes, Ecol. Appl., 24, 181–195, https://doi.org/10.1890/1051-0761-24.1.181, 2014.
Orlowski, N., Frede, H.-G., Brüggemann, N., and Breuer, L.: Validation and application of a cryogenic vacuum extraction system for soil and plant water extraction for isotope analysis, J. Sens. Sens. Syst., 2, 179–193, https://doi.org/10.5194/jsss-2-179-2013, 2013.
Park, J., Kim, T., Moon, M., Cho, S., Ryu, D., and Seok Kim, H.: Effects of thinning intensities on tree water use, growth, and resultant water use efficiency of 50-year-old Pinus koraiensis forest over four years, Forest Ecol. Manage., 408, 121–128, https://doi.org/10.1016/j.foreco.2017.09.031, 2018.
Pearcy, R. W., Ehleringer, J. R., Mooney, H., and Rundel, P. W.: Plant Physiological Ecology: Field methods and instrumentation, Springer Science & Business Media, 463 pp., ISBN 0412232308, 2012.
R Studio Team: R Studio: Integrated Development Environment for R, RStudio, PBC, Boston, MA U,
http://www.rstudio.com/ (last access: 22 October 2024), 2020.
Russell, H. W.: Estimating Potential Evapotranspiration, Massachusetts Institude of Technology, 82 pp.,
http://hdl.handle.net/1721.1/79479 (last access: 22 October 2024), 1960.
Sánchez-Pérez, J. M., Lucot, E., Bariac, T., and Trémolières, M.: Water uptake by trees in a riparian hardwood forest (Rhine floodplain, France), Hydrol. Process., 22, 366–375, https://doi.org/10.1002/hyp.6604, 2008.
Simonin, K., Kolb, T. E., Montes-Helu, M., and Koch, G. W.: Restoration thinning and influence of tree size and leaf area to sapwood area ratio on water relations of Pinus ponderosa, Tree Physiol., 26, 493–503, https://doi.org/10.1093/treephys/26.4.493, 2006.
Simonin, K., Kolb, T. E., Montes-Helu, M., and Koch, G. W.: The influence of thinning on components of stand water balance in a ponderosa pine forest stand during and after extreme drought, Agr. Forest Meteorol., 143, 266–276, https://doi.org/10.1016/j.agrformet.2007.01.003, 2007.
Sohn, J. A., Kohler, M., Gessler, A., and Bauhus, J.: Interactions of thinning and stem height on the drought response of radial stem growth and isotopic composition of Norway spruce (Picea abies), Tree Physiol., 32, 1199–1213, https://doi.org/10.1093/treephys/tps077, 2012.
Sohn, J. A., Brooks, J. R., Bauhus, J., Kohler, M., Kolb, T. E., and McDowell, N. G.: Unthinned slow-growing ponderosa pine (Pinus ponderosa) trees contain muted isotopic signals in tree rings as compared to thinned trees, Trees, 28, 1035–1051, https://doi.org/10.1007/s00468-014-1016-z, 2014.
Sohn, J. A., Saha, S., and Bauhus, J.: Potential of forest thinning to mitigate drought stress: A meta-analysis, Forest Ecology and Management, 380, 261–273, https://doi.org/10.1016/j.foreco.2016.07.046, 2016.
Sprenger, M., Tetzlaff, D., and Soulsby, C.: Soil water stable isotopes reveal evaporation dynamics at the soil–plant–atmosphere interface of the critical zone, Hydrol. Earth Syst. Sci. 21, 3839–3858, https://doi.org/10.5194/hess-21-3839-2017, 2017.
Stagge, J. H., Tallaksen, L. M., Xu, C. Y., and Lanen, H. A. J. V.: Standardized precipitation-evapotranspiration index (SPEI): Sensitivity to potential evapotranspiration model and parameters, Hydrology in a Changing World, in: 7th World Flow Regimes from International and Experimental Network Data-Water Conference, FRIEND-Water 2014, 7–10 October 2014, Montpellier, France, 367–373, ISBN 9781907161414, 2014.
Stock, B. C., Jackson, A. L., Ward, E. J., Parnell, A. C., Phillips, D. L., and Semmens, B. X.: Analyzing mixing systems using a new generation of Bayesian tracer mixing models, Peer J., 6, e5096, https://doi.org/10.7717/peerj.5096, 2018.
Streck, N. A.: Stomatal Response to water vapor pressure deficit: An unsolved issue, Curr. Agricult. Sci. Technol., 6, 317–322, 2003.
Stumpp, C., Brüggemann, N., and Wingate, L.: Stable Isotope Approaches in Vadose Zone Research, Vadose Zone J., 17, 180096, https://doi.org/10.2136/vzj2018.05.0096, 2018.
Szymczak, S., Barth, J., Bendix, J., Huneau, F., Garel, E., Häusser, M., Juhlke, T., Knerr, I., Santoni, S., Mayr, C., Trachte, K., van Geldern, R., and Bräuning, A.: First indications of seasonal and spatial variations of water sources in pine trees along an elevation gradient in a Mediterranean ecosystem derived from
δ18O, Chem. Geol., 549, 119695, https://doi.org/10.1016/j.chemgeo.2020.119695, 2020.
Tsuruta, K., Yamamoto, H., Katsuyama, M., Kosugi, Y., Okumura, M., and Matsuo, N.: Effects of cryogenic vacuum distillation on the stable isotope ratios of soil water, Hydrol. Res. Lett., 13, 1–6, https://doi.org/10.3178/hrl.13.1, 2019.
Vargas, A. I., Schaffer, B., Yuhong, L., and Sternberg, L. da S. L.: Testing plant use of mobile vs immobile soil water sources using stable isotope experiments, New Phytol., 215, 582–594, 2017.
Wang, J., Fu, B., Lu, N., and Zhang, L.: Seasonal variation in water uptake patterns of three plant species based on stable isotopes in the semi-arid Loess Plateau, Sci. Total Environ., 609, 27–37, https://doi.org/10.1016/j.scitotenv.2017.07.133, 2017.
Wang, T., Xu, Q., Gao, D., Zhang, B., Zuo, H., and Jiang, J.: Effects of thinning and understory removal on the soil water-holding capacity in Pinus massoniana plantations, Sci. Rep., 11, 13029, https://doi.org/10.1038/s41598-021-92423-5, 2021.
Wang, Y., Wei, X., del Campo, A. D., Winkler, R., Wu, J., Li, Q., and Liu, W.: Juvenile thinning can effectively mitigate the effects of drought on tree growth and water consumption in a young Pinus contorta stand in the interior of British Columbia, Canada, Forest Ecol. Manage., 454, 117667, https://doi.org/10.1016/j.foreco.2019.117667, 2019.
Warren, J. M., Meinzer, F. C., Brooks, J. R., and Domec, J. C.: Vertical stratification of soil water storage and release dynamics in Pacific Northwest coniferous forests, Agr. Forest Meteorol., 130, 39–58, https://doi.org/10.1016/j.agrformet.2005.01.004, 2005.
Wassenaar, L. I., Athanasopoulos, P., and Hendry, M. J.: Isotope hydrology of precipitation, surface and ground waters in the Okanagan Valley, British Columbia, Canada, J. Hydrol., 411, 37–48, https://doi.org/10.1016/j.jhydrol.2011.09.032, 2011.
West, A. G., Patrickson, S. J., and Ehleringer, J. R.: Water extraction times for plant and soil materials used in stable isotope analysis, Rapid Commun. Mass Spectrom., 20, 1317–1321, https://doi.org/10.1002/rcm.2456, 2006.
Winkler, R., Diana, A., Giles, T., Heise, B., Moore, R. D., Redding, T., Spittlehouse, D., and Wei, X.: Approaching four decades of Forest Watershed research at Upper Penticton Creek, British Columbia: A Synthesis, Hydrol. Process., 35, e14123, https://doi.org/10.1002/hyp.14123, 2021.
Winkler, R. D. and Moore, R. D.: Variability in snow accumulation patterns within forest stands on the interior plateau of British Columbia, Canada, Hydrol. Process., 20, 3683–3695, https://doi.org/10.1002/hyp.6382, 2006.
Wu, H., Hayes, M. J., Wilhite, D. A., and Svoboda, M. D.: The effect of the length of record on the standardized precipitation index calculation, Int. J. Climatol., 25, 505–520, https://doi.org/10.1002/joc.1142, 2005.