Canopy transpiration of a Pinus canariensis forest at the tree line: implications for its distribution under predicted climate warming

Brito, Patricia; Lorenzo, José R.; González‐Rodríguez, A.; Morales, D.; Wieser, Gerhard; Jiménez, María Soledad

doi:10.1007/s10342-014-0779-5

Cited by 25 publications

(29 citation statements)

References 63 publications

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“…and their populations of NE Spain in maximum water transport capacity or vulnerability to embolism, corroborating that this homogeneity in hydraulic capacity is quite general in pines (Martínez-Vilalta et al 2004). In Pinus canariensis Sweet, transpiration estimated by sap flow responded to canopy conductance, which was found to decline significantly with increasing evaporative demand and thus significantly reduced tree water loss, and this decrease was more pronounced during the soil drought (Brito et al 2014). These considerations suggest that other mechanisms, i.e., stomatal regulation, may play a major role in adaptation and acclimatization to drought stress in pine species (Irvine et al 1998).…”

Section: Discussionmentioning

confidence: 93%

Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis

Manzanera¹,

Gómez-Garay²,

Pintos³

et al. 2017

iForest

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In a climate change scenario, Mediterranean forest species such as pines may be endangered by rising temperatures and reduced precipitation, thus calling for studies on the transpiration and water balance in pines. In this paper, the response of young plants of Pinus sylvestris L., Pinus pinea L. and Pinus halepensis Mill. to different irrigation treatments has been studied. Significant differences were found in water potential, sap flow, leaf-level gas exchange and spectral variables. P. sylvestris had higher pre-dawn and midday water potentials, sap flow rates and leaf-level gas exchange rates compared to the other two species in well-watered conditions. Vapor pressure gradient correlated with stomatal conductance, net assimilation and transpiration, but the association between stomatal conductance and sap flow was weak. The environmental variables more strongly associated with sap flow were solar radiation and reference evapo-transpiration, especially in the well-watered plants, but those associations were weaker in the stressed plants. All three pine species showed the isohydric, drought-avoiding strategy common in the genus Pinus, maintaining relatively high water potentials in dry conditions. Nevertheless, P. halepensis showed a water-saving strategy, with a stomatal closure behavior under drought. Stomatal regulation was less strict in P. sylvestris, closer to a water-spending pattern, while P. pinea showed an intermediate behavior. Significant differences were recorded among species in spectral reflectance in the visible and infra-red regions. Photochemical Reflectance Index, Normalized Difference Vegetation Index and combinations of other ratios permitted the discrimination among the three pine species. These spectral variables showed association with sap flow rate, water potential and leaflevel gas exchange variables. Both cluster analysis and k-means classification discriminated Scots pine and Aleppo pine in two different groups. On the other hand, Stone pine showed differences in spectral behavior depending on the hydric status of the plants. Well-watered Stone pine plants had the same spectral behavior as Scots pine, while the plants subjected to drought stress were closer to Aleppo pine plants in spectral response. These findings may help to quantify the impacts of early and mid-summer water deficit on Mediterranean pines in future climate regimes.

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Section: Discussionmentioning

confidence: 93%

Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis

Manzanera¹,

Gómez-Garay²,

Pintos³

et al. 2017

iForest

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“…The geological substrate is of volcanic origin (basalt), and the soil is classified as a Leptosol, a soil type typical for dry regions at high elevations in Tenerife (Arbelo et al, 2009). The water holding capacity of the top soil (5-35 cm depth) at saturation (−0.001 MPa) averages 0.46 m 3 m −3 , and the corresponding values for field capacity (−0.033 MPa) and the wilting point (−1.5 MPa; sensu Blume et al, 2010) average 0.23 and 0.09 m 3 m −3 , respectively (Brito et al, 2014).…”

Section: Study Site and Environmental Conditionsmentioning

confidence: 99%

“…Further details concerning climatic, soil and stand conditions are given in Brito et al (2010Brito et al ( , 2013Brito et al ( , 2014.…”

Section: Study Site and Environmental Conditionsmentioning

confidence: 99%

“…It is well known that both fluxes are strongly influenced by drought (Tallaksen and Van Lanen, 2004). Given its importance, transpiration of forest canopies has been measured in a wide range of environments but measurements in treeline ecosystems with Mediterranean climate are rare and detailed investigations are needed (Brito et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Canopy transpiration of a semi arid Pinus canariensis forest at a treeline ecotone in two hydrologically contrasting years

Brito

Lorenzo

González‐Rodríguez

et al. 2015

Agricultural and Forest Meteorology

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“…(13)). Based on this relationship and the tree distribution per ha with respect to the DBH, the daily Tr was calculated by integrating the actual E c for each day over all the DBH classes (Brito et al, 2014).…”

Section: Stand Structural Charactersmentioning

confidence: 99%

Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of Populus simonii Carr in Northwest China

Sun

Luo

2016

Agricultural Water Management

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a b s t r a c tFarmland shelterbelts provide an ecological protection screen for an oasis but exhibit high mortality in the face of water shortage. It is necessary to understand farmland shelterbelt tree transpiration under different levels of water stress and stand ages for proper management. Sap flux measurement techniques and models are among the most useful method to detect water stress and to evaluate plant water consumption. The usefulness of both methods decreases, however, when applied to species, such as Populus simonii Carr, that have an outstanding tolerance to drought and a remarkable capacity to take up water from drying soils. Our hypothesis is that analysis using simultaneous measurements of sap flow and models in the same trees is useful for assessing the irrigation needs in farmland shelterbelts. To test our hypothesis, we analysed the relationships between canopy transpiration, canopy conductance, relative extractable water and atmospheric factors in a farmland shelterbelt and evaluated the effectiveness of the model. Measurements were made during one growing season. The time courses of sap flow measured and modelled on days of contrasting weather and soil water conditions were analysed to evaluate the usefulness of the method to assess the crop water needs. We calculated the daily tree water consumption from sap flow measurements and the parameterized modified Jarvis-Stewart model, and we evaluated the model's usefulness to assess the final water needs under water stress and stand ages for farmland shelterbelt irrigation. The transpiration decreased as the soil drought increased, and it increased as the atmospheric drought increased. The time course of the water needs showed that the occurrence of water stress in the farmland shelterbelt trees had a large impact on their water consumption, which increased as the water stress decreased, following the equation y = 1/[1 + e −60.67 × (REWx−0.402) ]. The simultaneous use of modelling and tree structural data increased the reliability of assessing water needs from youth to maturity. A similar analysis with the water consumption values, from which stand age values were derived, showed that water needs increased with the tree age following the equation y = 847 − 844/[1 + (x/87.9) 1.9 ]. We conclude that compared to the use of sap flow records alone, the simultaneous use of sap flow records and model values provides more detailed information to assess water needs in a farmland shelterbelt, which has an important significance for farmland shelterbelt protection.

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Canopy transpiration of a Pinus canariensis forest at the tree line: implications for its distribution under predicted climate warming

Cited by 25 publications

References 63 publications

Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis

Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis

Canopy transpiration of a semi arid Pinus canariensis forest at a treeline ecotone in two hydrologically contrasting years

Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of Populus simonii Carr in Northwest China

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