2021
DOI: 10.1590/01047760202127012999
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Transpiration of Swartzia tomentifera in response to microclimatic variability in the central Amazon: the net effect of vapor pressure déficit

Abstract: Background:The distribution of precipitation in the Amazon region is changing in last decades, but it is uncertain if transpiration will decrease in response to changes in rainfall distribution. In this study we aimed to assess the effect of climatic variability on whole-tree transpiration (inferred from sap flow measurements). We collected climate data (precipitation, photosynthetically active radiation -PAR, relative humidity, vapor pressure deficit -VPD, and temperature) and measured sap flow rates (SFR) in… Show more

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Cited by 2 publications
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“…The positive effect of VPD on sap flow became negative after removing the correlation between environmental factors even during the daytime. This particular phenomenon was also seen in the study by Antezana-Vera and Marenco (2021) . The effect of net VPD on the sap flow is negative during the daytime and positive during nighttime when the influence of other factors on VPD is removed.…”
Section: Discussionsupporting
confidence: 81%
“…The positive effect of VPD on sap flow became negative after removing the correlation between environmental factors even during the daytime. This particular phenomenon was also seen in the study by Antezana-Vera and Marenco (2021) . The effect of net VPD on the sap flow is negative during the daytime and positive during nighttime when the influence of other factors on VPD is removed.…”
Section: Discussionsupporting
confidence: 81%