Prolonged warming and drought modify belowground interactions for water among coexisting plants
| Autor: | Nate G. McDowell, Sanna Sevanto, Wenzhi Wang, Charlotte Grossiord, Todd E. Dawson, Max Ryan, Damien Bonal, Isaac Borrego |
|---|---|
| Přispěvatelé: | United States Department of Energy, SILVA (SILVA), Institut National de la Recherche Agronomique (INRA)-AgroParisTech-Université de Lorraine (UL), University of California [Berkeley], University of California, Chinese Academy of Science (CACMS), Los Alamos National Laboratory, Pacific Northwest National Labs LDRD program, US Department of Energy, Office of Science, Biological and Environmental Research, Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL)-AgroParisTech, Chinese Academy of Science (CAS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine DYNAMICS Perennial plant Physiology [SDV]Life Sciences [q-bio] interaction plante eau Plant Science drought 01 natural sciences Soil water stress groundwater SOIL-WATER TEMPERATURE media_common Transpiration sécheresse water transport (in plants) Moisture food and beverages TRANSPIRATION semi-arid zone Droughts eau souterraine PRECIPITATION TREES arbre adulte STRATEGIES media_common.quotation_subject Climate Change Poaceae Competition (biology) 03 medical and health sciences Precipitation réchauffement climatique CONDUCTANCE fungi Plant Transpiration graminée Interspecific competition zone semi aride 15. Life on land Carbon Dioxide Pinus Water resources 030104 developmental biology Agronomy 13. Climate action Juniperus Environmental science adaptation au changement climatique stress hydrique Water use 010606 plant biology & botany RESPONSES |
| Zdroj: | Tree Physiology Tree Physiology, Oxford University Press (OUP): Policy B-Oxford Open Option B, 2019, 39 (1), pp.55-63. ⟨10.1093/treephys/tpy080⟩ |
| ISSN: | 0829-318X 1758-4469 |
| DOI: | 10.1093/treephys/tpy080⟩ |
| Popis: | Understanding how climate alters plant-soil water dynamics, and its impact on physiological functions, is critical to improved predictions of vegetation responses to climate change. Here we analyzed how belowground interactions for water shift under warming and drought, and associated impacts on plant functions. In a semi-arid woodland, adult trees (pinon and juniper) and perennial grasses (blue grama) were exposed to warming and precipitation reduction. After 6 years of continuous treatment exposure, soil and plant water isotopic composition was measured to assess plant water uptake depths and community-level water source partitioning. Warming and drought modified plant water uptake depths. Under warming, contrasting changes in water sources between grasses and trees reduced belowground water source partitioning, resulting in higher interspecific competition for water. Under drought, shifts in trees and grass water sources to deeper soil layers resulted in the maintenance of the naturally occurring water source partitioning among species. Trees showed higher water stress, and reduced water use and photosynthesis in response to warming and drought. This case study demonstrates that neighboring plants shift their competitive interactions for water under prolonged warming and drought, but regardless of whether changes in moisture sources will result in increased competition among species or maintained partitioning of water resources, these competitive adaptations may easily be overridden by climate extremes. |
| Databáze: | OpenAIRE |
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