Isotopic composition of throughfall in pine plantation and native eucalyptus forest in South Australia

Xu, Xiang; Guan, Huade; Deng, Zijuan

doi:10.1016/j.jhydrol.2014.03.068

Cited by 26 publications

(48 citation statements)

References 42 publications

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“…DeWalle and Swistock () found that enrichment of TF δ 18 O relative to P g was negatively correlated with rainfall intensity. Conversely, Xu et al () showed no significant relationship between enrichment of TF δ 18 O compared with P g and total rainfall depth, and Allen et al () derived generally weak and inconsistent relationships between deviation of δ 18 O in TF relative to P g and event size, I / P g or precipitation intensity. Soulsby et al () also found no statistical relationship between TF isotopic composition and P g amount or maximum intensity.…”

Section: Discussioncontrasting

confidence: 99%

“…Brodersen et al () reported general enrichment of δ 18 O in TF relative to P g for spruce and beech trees, but saw both enrichment and depletion of δ 18 O in SF relative to P g for a beech tree. Xu et al () found both enrichment and depletion of TF δ 18 O relative to that of P g for a pine plantation and a native eucalyptus forest in South Australia. Isotopic fluctuations of TF corresponded to those of P g in a Japanese cedar forest and those of SF did not, which Ikawa et al () attributed to rainwater storage in the canopy and on stems as well as the mixing of incoming and stored water with different isotopic compositions.…”

Section: Discussionmentioning

confidence: 98%

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Importance of rainfall partitioning in a northern mixed forest canopy for soil water isotopic signatures in ecohydrological studies

Snelgrove

Buttle

Tetzlaff

2019

Hydrological Processes

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The forest canopy can play a significant role in modifying the amount and isotopic composition of water during its passage throughout the near‐surface critical zone. Here, partitioning of gross rainfall into interception, throughfall, and stemflow and its implications for the amount and isotopic composition of soil water was studied for red oak, eastern white pine, and eastern hemlock trees in a northern hardwood‐conifer forest in south central Ontario, Canada. Stemflow production was greatest for red oak as a result of its upward‐projecting branches and least for eastern white pine due to its horizontal branches and rougher bark. These stemflow contributions to the near‐bole soil surface failed to produce consistently wetter soils relative to distal locations from the bole for all tree species. There was also no consistent evidence of isotopic enrichment of throughfall and stemflow relative to gross rainfall or of stemflow relative to throughfall for red oak or eastern hemlock. However, there was isotopic enrichment of both throughfall and stemflow for eastern white pine with increasing maximum atmospheric vapour pressure deficit, which may reflect the potential for evaporative fractionation as a result of retention and detention of water moving through the canopy by the rougher bark of this species. Dry soil conditions limited sampling of mobile soil water during the study, and there was no consistent evidence that either throughfall or stemflow fluxes controlled temporal changes in the isotopic signature of soil water beneath the tree. Thus, the potential for throughfall and stemflow fluxes in northern hardwood‐conifer forests to modify the isotopic composition of water taken up by the tree via transpiration remains an open question.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 98%

Importance of rainfall partitioning in a northern mixed forest canopy for soil water isotopic signatures in ecohydrological studies

Snelgrove

Buttle

Tetzlaff

2019

Hydrological Processes

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“…As observed by others (i.e., Dewalle & Swistock, 1994;Saxena, 1986;Stockinger, Lücke, Vereecken, & Bogena, 2017;Xu et al, 2014), our data also showed an enrichment pattern, with lighter throughfall than rainfall more common during the growing season (at higher temperatures) and heavier throughfall than rainfall more common during the dormant season (at lower temperatures). This pattern corroborates that fractionation is temperature dependent and that molecular bonds between lighter isotopes are more easily broken than molecular bonds between heavier isotopes (Majoube, 1971).…”

Section: Intrastorm Isotopic Composition Of Rainfall and Throughfallsupporting

confidence: 90%

Modification of the isotopic composition of rainfall by throughfall and stemflow: The case of Scots pine and downy oak forests under Mediterranean conditions

et al. 2018

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Most hydrological studies based on stable water isotopes ( 18 O and D) use the isotopic composition of rainfall as input signal. Although stable water isotopes are conservative tracers, previous studies have shown that canopies modify the isotopic composition of rainfall. At present, there is a scientific agreement about the factors involved in isotopic modification, but the effect of each factor and the magnitude of the isotopic shift are still not clear. In this study, we analyse at an interevent and intraevent basis the spatio-temporal differences between the isotopic composition of rainfall, throughfall, and stemflow for two different species (Pinus sylvestris L. and Quercus pubescens Willd). The aim of the study is to analyse the isotopic modification that takes place in throughfall and stemflow and how meteorological variables and structural forest characteristics influence the observed changes. Rainfall and throughfall were sampled by a combination of bulk and sequential collectors, whereas stemflow was collected only by bulk collectors. Results showed that the isotopic modification occurred in both directions, although stemflow was consistently more enriched than throughfall. Despite the contrasting canopy structures, no significant differences between species were found. Moreover, the intraevent analysis suggested that all fractionation factors could occur during one event, but evaporation or isotopic exchange would have a higher impact at the beginning of rainfall, whereas canopy selection processes would be more important at the end of rainfall. Our results emphasize the importance of considering the isotopic composition of throughfall and stemflow in isotope-related studies in forested catchments.

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“…Improving our understanding about rainfall partitioning in forests ecosystems is very important for studies that focus on forest hydrology to better management and decision making on this vital ecosystems (Ajami et al, 2011;Brecciaroli et al, 2012;Davudirad et al, 2015;Dohnal et al, 2014;Frot et al, 2007;Holko et al, 2009;Xu et al, 2014). Such eco-hydrological studies lead to a proper hydrological balance analysis and therefore have been well considered in forest hydrology studies during last few decades (Adriaenssens et al, 2012;Bosch and Hewlett, 1982;Carlyle-Moses, 2004;Devlaeminck et al, 2005;Gurav et al, 2012;Marin et al, 2000;Llorens and Domingo, 2007;Mitchell et al, 1986;Molina and Campo, 2012;Nanko et al, 2006;Park and Cameron, 2008;Rahmani et al, 2011;Shachnovich et al, 2008;Tcherepanov et al, 2005;Xu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…rainfall characteristics, canopy architecture, branch angle, canopy cover, tree age, leaves shapes, types and dimensions, phonological stages, and even silvicutural practices affect hydrologic behavior of forest stand against input rainfall (Brandt, 1987;Bruijnzeel, 2005;Davudirad et al, 2015;Davudirad et al, 2016;Gay et al, 2015;Guswa and Spence, 2012;Huber and Iroumé, 2001;Molina and Campo, 2012;Nanko et al, 2006;Onozawa et al, 2009;Pérez-Suárez et al, 2008;Pypker et al, 2005;Staelens et al, 2007;Van Stan et al, 2012;Xu et al, 2014). Due to dynamic varia-bility of affecting factors in space and time, the throughfall as an important component of hydrologic cycle in forest ecosystems varies temporally and spatially (Forti and Neal, 1992;Staelens et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variation of throughfall in a hyrcanian plain forest stand in Northern Iran

Yousefi

Sadeghi

Mirzaee

et al. 2017

Journal of Hydrology and Hydromechanics

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Elucidating segregation of precipitation in different components in forest stands is important for proper forest ecosystems management. However, there is a lack of information on important rainfall components viz. throughfall, interception and stemflow in forest watersheds particularly in developing countries. We therefore investigated the spatiotemporal variation of important component of throughfall for a forest stand in a Hyrcanian plain forest in Noor City, northern Iran. The study area contained five species of Quercus castaneifolia, Carpinus betulus, Populus caspica and Parrotia persica. The research was conducted from July 2013 to July 2014 using a systematic sampling method. Ninetysix throughfall collectors were installed in a 3.5 m × 3.5 m grid cells. The canopy covers during the growing/leaf-on (i.e., from May to November) and non-growing/leaf-off (i.e., from December to March) seasons were approximately 41% and 81%, respectively. The mean cumulative throughfall during the study period was 623±31 mm. The average throughfall (TF) as % of rainfall (TFPR) during leaf-on and leaf-off periods were calculated 56±14% and 77±10%, respectively. TF was significantly (R 2 = 0.97, p = 0.00006) correlated with gross precipitation. Percent of canopy cover was not correlated with TF except when gross precipitation was <30 mm. A comparison between leaf-off and leaf-on conditions indicated a significantly higher TFPR and corresponding hotspots during leaf-on period. TFPR also differed between seasons with a maximum amount in winter (82%). The results of the study can be effectively used by forest watershed managers for better perception of hydrological behavior of the Hyrcanian forest in the north of Iran under different silvicultural circumstances leading to getting better ecosystem services.

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Isotopic composition of throughfall in pine plantation and native eucalyptus forest in South Australia

Cited by 26 publications

References 42 publications

Importance of rainfall partitioning in a northern mixed forest canopy for soil water isotopic signatures in ecohydrological studies

Importance of rainfall partitioning in a northern mixed forest canopy for soil water isotopic signatures in ecohydrological studies

Modification of the isotopic composition of rainfall by throughfall and stemflow: The case of Scots pine and downy oak forests under Mediterranean conditions

Spatio-temporal variation of throughfall in a hyrcanian plain forest stand in Northern Iran

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