دورية أكاديمية
Eastern US deciduous tree species respond dissimilarly to declining soil moisture but similarly to rising evaporative demand.
| العنوان: | Eastern US deciduous tree species respond dissimilarly to declining soil moisture but similarly to rising evaporative demand. |
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| المؤلفون: | Denham SO; O'Neill School of Public and Environmental Affairs, Indiana University-Bloomington, 702 N. Walnut Grove Ave, Bloomington, IN 47405, USA.; USDA Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, 3160 Coweeta Lab Rd, Otto, NC 28763, USA., Oishi AC; USDA Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, 3160 Coweeta Lab Rd, Otto, NC 28763, USA., Miniat CF; USDA Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, 3160 Coweeta Lab Rd, Otto, NC 28763, USA., Wood JD; School of Natural Resources, University of Missouri, 1111 Rollins St., Columbia, MO 65211, USA., Yi K; O'Neill School of Public and Environmental Affairs, Indiana University-Bloomington, 702 N. Walnut Grove Ave, Bloomington, IN 47405, USA.; Department of Environmental Sciences, University of Virginia, 291 McCormick Rd, Charlottesville, VA 29904, USA., Benson MC; O'Neill School of Public and Environmental Affairs, Indiana University-Bloomington, 702 N. Walnut Grove Ave, Bloomington, IN 47405, USA., Novick KA; O'Neill School of Public and Environmental Affairs, Indiana University-Bloomington, 702 N. Walnut Grove Ave, Bloomington, IN 47405, USA. |
| المصدر: | Tree physiology [Tree Physiol] 2021 Jun 07; Vol. 41 (6), pp. 944-959. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: Oxford University Press Country of Publication: Canada NLM ID: 100955338 Publication Model: Print Cited Medium: Internet ISSN: 1758-4469 (Electronic) Linking ISSN: 0829318X NLM ISO Abbreviation: Tree Physiol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Oxford : Oxford University Press Original Publication: Victoria, [B.C.] : Heron Pub., c1986- |
| مواضيع طبية MeSH: | Soil* , Trees*, Droughts ; Forests ; Plant Leaves ; Plant Transpiration ; Water |
| مستخلص: | Hydraulic stress in plants occurs under conditions of low water availability (soil moisture; θ) and/or high atmospheric demand for water (vapor pressure deficit; D). Different species are adapted to respond to hydraulic stress by functioning along a continuum where, on one hand, they close stomata to maintain a constant leaf water potential (ΨL) (isohydric species), and on the other hand, they allow ΨL to decline (anisohydric species). Differences in water-use along this continuum are most notable during hydrologic stress, often characterized by low θ and high D; however, θ and D are often, but not necessarily, coupled at time scales of weeks or longer, and uncertainty remains about the sensitivity of different water-use strategies to these variables. We quantified the effects of both θ and D on canopy conductance (Gc) among widely distributed canopy-dominant species along the isohydric-anisohydric spectrum growing along a hydroclimatological gradient. Tree-level Gc was estimated using hourly sap flow observations from three sites in the eastern United States: a mesic forest in western North Carolina and two xeric forests in southern Indiana and Missouri. Each site experienced at least 1 year of substantial drought conditions. Our results suggest that sensitivity of Gc to θ varies across sites and species, with Gc sensitivity being greater in dry than in wet sites, and greater for isohydric compared with anisohydric species. However, once θ limitations are accounted for, sensitivity of Gc to D remains relatively constant across sites and species. While D limitations to Gc were similar across sites and species, ranging from 16 to 34% reductions, θ limitations to Gc ranged from 0 to 40%. The similarity in species sensitivity to D is encouraging from a modeling perspective, though it implies that substantial reduction to Gc will be experienced by all species in a future characterized by higher D. (© The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.) |
| فهرسة مساهمة: | Keywords: conductance; drought; sap flux; vapor pressure deficit |
| المشرفين على المادة: | 0 (Soil) 059QF0KO0R (Water) |
| تواريخ الأحداث: | Date Created: 20201113 Date Completed: 20210628 Latest Revision: 20210628 |
| رمز التحديث: | 20240829 |
| DOI: | 10.1093/treephys/tpaa153 |
| PMID: | 33185239 |
| قاعدة البيانات: | MEDLINE |
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