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Warming combined with more extreme precipitation regimes modifies the water sources used by trees [Elektronski vir]Grossiord, Charlotte ...The persistence of vegetation under climate change will depend on a plant%s capacity toexploit water resources. We analyzed water source dynamics in pi~non pine and juniper treessubjected to ... precipitation reduction, atmospheric warming, and to both simultaneously.%Pi~non and juniper exhibited different and opposite shifts in water uptake depth in responseto experimental stress and background climate over 3 yr. During a dry summer, juniperresponded to warming with a shift to shallow water sources, whereas pi~non pine respondedto precipitation reduction with a shift to deeper sources in autumn. In normal and wet sum-mers, both species responded to precipitation reduction, but juniper increased deep wateruptake and pi~non increased shallow water uptake.%Shifts in the utilization of water sources were associated with reduced stomatal conduc-tance and photosynthesis, suggesting that belowground compensation in response to warm-ing and water reduction did not alleviate stress impacts for gas exchange.%We have demonstrated that predicted climate change could modify water sources of trees.Warming impairs juniper uptake of deep sources during extended dry periods. Precipitationreduction alters the uptake of shallow sources following extended droughts for pi~non. Shiftsin water sources may not compensate for climate change impacts on tree physiology.Source: The new phytologist [Elektronski vir]. - ISSN 1469-8137 (Vol. 213, iss. 2, Jan. 2017, str. 584-596)Type of material - e-articlePublish date - 2017Language - englishCOBISS.SI-ID - 5024678
Author
Grossiord, Charlotte |
Sevanto, Sanna |
Dawson, Todd E. |
Adams, Henry D. |
Collins, Adam D. |
Dickmann, Lee T. |
Newman, Brent D. |
Stockton, Elizabeth A. |
McDowell, Nate G.
Topics
climate change |
gasexchange |
Juniperus monosperma |
Pinusedulis |
water extraction depth |
podnebne spremembe |
izmenjava plina |
Juniperus monosperma |
globina |
ekstrakcije vode
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Grossiord, Charlotte | ![]() |
Sevanto, Sanna | ![]() |
Dawson, Todd E. | ![]() |
Adams, Henry D. | ![]() |
Collins, Adam D. | ![]() |
Dickmann, Lee T. | ![]() |
Newman, Brent D. | ![]() |
Stockton, Elizabeth A. | ![]() |
McDowell, Nate G. | 36746 |
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