Seasonal cycles of sap flow and stem radius variation of Spartocytisus supranubius in the alpine zone of Tenerife, Canary Islands

González‐Rodríguez, A.; Brito, Patricia; Lorenzo, José R.; Gruber, Andreas; Oberhuber, Walter; Wieser, Gerhard

doi:10.1007/s00035-017-0189-7

Cited by 17 publications

(16 citation statements)

References 72 publications

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“…A statistical analysis of the data was carried out using SPSS v19.0 (IBM Corp., Armonk, NY, USA). Indicators of stem diameter shrinkage [12,[27][28][29] were calculated using stem diameter variation data at a half-hour time scale. TWD was calculated based on the zero-growth assumption [29]:…”

Section: Discussionmentioning

confidence: 99%

“…This approach has been widely used for agricultural irrigation guidance [6], crop growth monitoring [7,8], and forestry research [9,10]. Many studies [11,12] have shown that stem diameter shrinkage is mainly determined by sap flow changes. However, such studies are not extensive [5,8], and research into different stem diameter shrinkage indicator responses to sap flow still lacks theoretical support [13].…”

Section: Introductionmentioning

confidence: 99%

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The Relationship between Stem Diameter Shrinkage and Tree Bole Moisture Loss Due to Transpiration

Tian

Zhang

et al. 2019

Forests

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The responsiveness of four types of stem diameter shrinkage indicators to sap flow changes was compared under four air temperature and cloudiness conditions: above 0 °C below 80% cloud cover days; above 0 °C large percentage cloud cover days; low temperature below 80% cloud cover days; and low temperature large percentage cloud cover days. In this study, we investigated the effects of indicative functions of relatively easy-to-access stem diameter shrinkage on variation characteristics of sap flow. High-resolution-based stem diameter shrinkage is related to changes in tree moisture content. Stem diameter shrinkage indicators are adopted to confirm sap flow changes resulting from transpiration pull, which may enhance the power of stem diameter shrinkage as an index for tree bole moisture loss. After measuring stem diameter variations, the following stem diameter shrinkage indicators were calculated: maximum daily shrinkage, daily stem diameter increment, daily stem diameter variation, and tree water deficit-induced stem shrinkage (TWD). Sap flow was measured synchronously, and stem diameter shrinkage indicators were analyzed to confirm their responses to sap flow. TWD was positively correlated (r ≥ 0.317) with daily variations in sap flow and reached extremely significant levels (p ≤ 0.001) under all conditions. TWD and maximum daily shrinkage were able to better reflect the correlation between changes in stem diameter and sap flow on a daily scale, except large percentage cloud cover days with low temperatures. Changes in stem diameter had no correlation with sap flow during low temperature and large percentage cloud cover days. Among all stem diameter shrinkage indicators, TWD showed the highest correlation (r ≥ 0.601 and p ≤ 0.001) with sap flow under all conditions, except during large percentage cloud cover days with low temperatures. The stem diameter shrinkage indicators did not reflect sap flow changes during large percentage cloud cover days with low temperatures. The indicator that best reflected moisture loss of trees was TWD.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Relationship between Stem Diameter Shrinkage and Tree Bole Moisture Loss Due to Transpiration

Tian

Zhang

et al. 2019

Forests

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“…The main driving factors for TWD were sap flow density and solar radiation. As for the TWD response to changes in sap flow density [28], due to the transpiration and unbalance of root water absorption [29], as well as the process of changing osmotic, there was reversible stem radius changes caused by moisture reduction of trees. Only the sap flow density and the vapour pressure deficit directly affected the duration of the contraction phase.…”

Section: Discussionmentioning

confidence: 99%

Stem Radius Variation in Response to Hydro-Thermal Factors in Larch

Tian

Zhang

Liu

et al. 2018

Forests

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The response mechanism of the tree stem radius variation to hydro-thermal factors is complex and diverse. The changes of TWD (tree water deficit-induced stem shrinkage) and GRO (growth-induced irreversible stem expansion) are respectively driven by different factors, so that their responses to hydro-thermal factors are different. The stem radius variation and its matching hydro-thermal factors experimental data was measured and determined at 0.5 h time scale in larch (Larix gmelini Rupr.) forest of the Daxing’anling region of the most northeastern part of China. Response characteristics of the stem radius variation to hydro-thermal factors have been found by analyzing the data under different time windows. The stem radius variation mainly responded to the changes in precipitation and relative humidity. The main driving factors for TWD were sap flow density and solar radiation. The response of GRO to hydro-thermal factors was complex, varied a lot under different time scales. During the analysis of the response of tree radial growth, changes of the stem radius can be divided to TWD and GRO to implement separate studies on their responses to hydro-thermal factors. In this way, it becomes easier to discover the response of TWD under drought stress and the responding mechanism of GRO to hydro-thermal factors.

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“…We assume that the lower interannual changes in cumulative ΔW of P. sylvestris and L. decidua result from lower elasticity of their tissues due to their higher wood density (Požgaj et al, 1993;Zeidler et al, 2018). González-Rodríguez et al (2017) have shown that stem diameter shrinkage is mainly determined by sap flow changes. Variations in stem diameter act in response to a tree daily water intake and loss of moisture (Irvine and Grace, 1997).…”

Section: Seasonal Development Of Stem Growth and Tree Water Statusmentioning

confidence: 99%

Interspecific variation in growth and tree water status of conifers under water-limited conditions

Leštianska

Fleischer

Merganičová

et al. 2020

Journal of Hydrology and Hydromechanics

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We monitored seasonal dynamics of stem water status of four coniferous species (Abies alba, Larix decidua, Picea abies and Pinus sylvestris) planted at the Borová hora Arboretum (300 m a.s.l., Zvolen valley, Central Slovakia) beyond their ecological and production optima, in the region with warmer and drier climate compared to the sites of their origin. Species-specific stem water deficit and maximum daily shrinkage were extracted from diurnal band dendrometer records of stem circumference recorded by digital band dendrometers DRL26 installed on five trees per species, and correlations with environmental variables were analysed. The seasonal stem circumference increment of all tree species was higher in 2017 than in the drier and hotter year of 2018. The greatest seasonal stem circumference increment in the observed periods of 2017 and 2018 was observed for A. alba and P. sylvestris, respectively. The highest and lowest values of daily and seasonal stem water deficit were observed for L. decidua and A. alba, respectively. The analysis of trees' short-term response to extreme climate events seems to be the promising and suitable method for detecting tree species tolerance towards drought.

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Seasonal cycles of sap flow and stem radius variation of Spartocytisus supranubius in the alpine zone of Tenerife, Canary Islands

Cited by 17 publications

References 72 publications

The Relationship between Stem Diameter Shrinkage and Tree Bole Moisture Loss Due to Transpiration

The Relationship between Stem Diameter Shrinkage and Tree Bole Moisture Loss Due to Transpiration

Stem Radius Variation in Response to Hydro-Thermal Factors in Larch

Interspecific variation in growth and tree water status of conifers under water-limited conditions

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