Seasonal variation of δ18O and δ2H in leaf water of Fagus sylvatica L. and related water compartments

Plavcová, Lenka; Hronková, Marie; Šimková, M; Květoň, Jiří; Vráblová, Martina; Kubásek, Jiří; Šantrůček, Jiří

doi:10.1016/j.jplph.2018.03.009

Cited by 14 publications

(7 citation statements)

References 39 publications

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“…In our study, we found an offset between xylem water δD and water sources δD as it has been reported in recent studies (Plavcová et al, 2018;Evaristo et al, 2017;Geris et al, 2017). However, we only detected this offset in August, but not in June and July.…”

Section: Temporal Difference Of Xylem Water Isotopessupporting

confidence: 90%

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Zhang¹,

C.²,

Brandt³

et al. 2020

OJF

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Stable isotopes of xylem water ( 18 O and D) have been successfully used to determine sources of soil water for plant transpiration, but mainly in drought-prone environments. The water uptake strategies of three representative tree species in Japan, namely cedar (Cryptomeria japonica), larch (Larix kaempferi) and beech (Fagus crenata), were investigated using δ 18 O and δD of water (precipitation, soil and xylem), together with wood α-cellulose δ 13 C and δ 18 O, along one growing season. The study was carried out in the research forest of Yamagata University (Shonai region), a high precipitation area in Japan, which exceeds 3000 mm per year. Precipitation water δ 18 O and δD increased along the summer growing season, but oxygen and hydrogen isotopic composition of soil water remained essentially unchanged. In general, xylem water isotopes of cedar and larch followed the local meteoric water line, but beech xylem water was decoupled from soil and precipitation values in July and August. For this tree species, the xylem water isotopic records were more depleted than cedar and larch xylem water isotopic values and the precipitation water isotopic records, indicating that beech used more water from soil layers during July-August than the other two species, which mainly used newly-fallen precipitation. Wood δ 18 O showed an opposite seasonal trend to the one found for xylem water, likely because of leaf water isotope enrichment, which was in turn controlled by seasonal transpiration rate. The higher δ 13 C values of cedar during summer suggested that this species had enhanced water-use efficiency during the growing season compared with the deciduous species larch and beech. Our results highlight different water use strategies among forest tree species even in areas where the annual water balance is far from limiting plant performance.

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Section: Temporal Difference Of Xylem Water Isotopessupporting

confidence: 90%

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Zhang¹,

C.²,

Brandt³

et al. 2020

OJF

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“…To determine the 18 O enrichment in soil water, frozen soil samples from Section 2.2.1 were subjected to cryodistillation, as described in (Plavcova et al., 2018). Briefly, frozen soil samples were transferred to 12 ml glass vials and inserted into a heating block.…”

Section: Methodsmentioning

confidence: 99%

Quantifying microbial growth and carbon use efficiency in dry soil environments via ¹⁸O water vapor equilibration

Canarini

Wanek

Watzka

et al. 2020

Global Change Biology

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“…Secondly, the δ 18 O and δ 2 H values were employed as conservative tracers to follow the movement of water from its input as rainfall, draining through the rock and soil, and finally to the release as soil evaporation and leaf transpiration (Mook, 2001; Penna & van Meerveld, 2019). Lastly, it is generally thought that leaf water contains more 18 O and 2 H than its source water on account of evapotranspiration (Liu et al, 2015; Plavcová et al, 2018). Then, the isotopic signals of leaf water are further accumulated in leaf‐derived organic materials, for example, cellulose (Barbour, 2007; Lehmann et al, 2017) and leaf wax (Liu et al, 2016; Liu and An, 2019), which serve as powerful proxies for paleoclimate reconstruction (Hepp et al, 2020; Pagani et al, 2006; Schefuβ et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Ecohydrological separation in a pair catchments covered with natural grassland and planted forestland on the Chinese Loess Plateau: Evidence from a one‐year stable isotope observation

Liu

Jiang

Guo

et al. 2022

Hydrological Processes

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Plantation and natural restoration has been practised on the Chinese Loess Plateau (CLP). However, how vegetation restorations affect ecohydrological processes remains unclear. Here, we investigated δ18O and δ2H values in rainwater/snow, soil mobile and less‐mobile water, and root/stem and leaf water under different vegetation covers in two neighbouring catchments (non‐woods from DZG‐Grassland, trees and understory from YJG‐Forestland) over 1‐year period. Soil mobile and less‐mobile water showed significantly distinct δ18O and δ2H values across months, but isotopic offsets between plant stems/roots and soil mobile and less‐mobile water (Δ18OM and Δ18OLM or Δ2HM and Δ2HLM) were consistent across vegetation types. These results supported ecohydrological separation, with a dynamic exchange between soil mobile and less‐mobile water on the CLP. The widespread isotopic offsets existed in the contrasted catchments, challenging the prior assumption of no isotope fractionation during root water uptake in the most terrestrial plants. Difference in leaf water isotopes was non‐significant across vegetation types, indicating that leaf water transpiration varied less significantly with vegetation types. Comparisons of the isotopic ecohydrology between forestland and grassland will help elucidate the hydrological cycle on the CLP.

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Seasonal variation of δ18O and δ2H in leaf water of Fagus sylvatica L. and related water compartments

Cited by 14 publications

References 39 publications

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Quantifying microbial growth and carbon use efficiency in dry soil environments via ¹⁸O water vapor equilibration

Ecohydrological separation in a pair catchments covered with natural grassland and planted forestland on the Chinese Loess Plateau: Evidence from a one‐year stable isotope observation

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Seasonal variation of δ18O and δ2H in leaf water of Fagus sylvatica L. and related water compartments

Cited by 14 publications

References 39 publications

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Using Water Stable Isotopes to Trace Water Sources of Three Typical Japanese Tree Species under Heavy Rainfall Conditions

Quantifying microbial growth and carbon use efficiency in dry soil environments via 18O water vapor equilibration

Ecohydrological separation in a pair catchments covered with natural grassland and planted forestland on the Chinese Loess Plateau: Evidence from a one‐year stable isotope observation

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Quantifying microbial growth and carbon use efficiency in dry soil environments via ¹⁸O water vapor equilibration