Subsurface water-use strategies and physiological responses of subtropical eucalypt woodland vegetation under changing water-availability conditions

Gow, Laura; Barrett, D. J.; O’Grady, Anthony P.; Renzullo, Luigi J.; Phinn, Stuart

doi:10.1016/j.agrformet.2017.10.005

Cited by 17 publications

(7 citation statements)

References 70 publications

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“…Thus, the stable isotopic composition of plant water represents the integrated response of root systems to water sources with different isotopic signatures and can help to determine the soil depth at which plants obtain water or the source of plant water [9,12]. Many studies have been conducted on plant water use patterns using stable isotope techniques that primarily focus on plant water use patterns in different vegetation types, growth seasons, and growing stages [13][14][15][16]. In general, plant water use patterns are influenced by many physiological and physical characteristics [17], such as the distribution and functioning of fine roots [13], the availability of soil water [14,15], and the water demands of trees [16].…”

Section: Introductionmentioning

confidence: 99%

“…Many studies have been conducted on plant water use patterns using stable isotope techniques that primarily focus on plant water use patterns in different vegetation types, growth seasons, and growing stages [13][14][15][16]. In general, plant water use patterns are influenced by many physiological and physical characteristics [17], such as the distribution and functioning of fine roots [13], the availability of soil water [14,15], and the water demands of trees [16]. However, most of these studies have focused on plant water use patterns in pure forests, and insufficient research has been conducted on the water use patterns of different vegetation types and stages of plant growth in desert riparian forests.…”

Section: Introductionmentioning

confidence: 99%

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Water Use Characteristics of Populus euphratica Oliv. and Tamarix chinensis Lour. at Different Growth Stages in a Desert Oasis

Wan

Shi

Dai

et al. 2022

Forests

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Understanding the water use characteristics of vegetation is crucial for guiding the rational allocation of water resources and the restoration of sustainable vegetation in natural oases in arid desert areas. To analyze the water use characteristics of Populus euphratica Oliv. and Tamarix chinensis Lour. at different stages of growth in the Daliyabuyi natural pristine oasis in northwestern China, the δ18O values of plant xylem of 15 sample trees with different sizes per species, potential water sources (i.e., river water, soil water, and groundwater), and the δ13C values of plant leaves of sample trees were measured in August 2019 and June 2020. The results show that the δ18O values of the xylem water of P. euphratica at different growth stages were similar, but water uptake proportions from deep soil water changed in P. euphratica trees at different growth stages between years with (2019) and without (2020) river water. In contrast, the main water source of young T. chinensis shrubs was deep soil water, and those of mature and overmature shrubs were deep soil water and groundwater in 2020. However, the plant leaf water use efficiency (WUE) of the P. euphratica and T. chinensis were higher without river water. Overall, the water uptake proportion from groundwater and the WUE for T. chinensis were higher than those for P. euphratica, and thus, T. chinensis was more dependent on groundwater. This means that vegetation types and growth stages are the essential factors to be considered in ecological restoration management, which can enhance the effectiveness of vegetation restoration strategies.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water Use Characteristics of Populus euphratica Oliv. and Tamarix chinensis Lour. at Different Growth Stages in a Desert Oasis

Wan

Shi

Dai

et al. 2022

Forests

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“…Previous studies of soil and plant between grasslands and shrubs only focused on exploiting different hydrological niches of plant and soil (Walker et al, 1981), soil moisture-vegetation feedbacks and their possible effects (D'Odorico et al, 2007), and functional differences in soil and plant (Ryel et al, 2008) by modeling. Additionally, physiological and physical characteristics (Volkmann et al, 2016), such as precipitation patterns (D'Odorico, et al, 2007), soil water availability (Gow et al, 2018) and distribution of fine roots (Lanning et al, 2020;Wang et al, 2021) affect the plant water use patterns, the plants influence soil water availability of different soil layers (Fu et al, 2017), with shallow soil water being affected by precipitation, and deep soil water being affected by groundwater (Feng, et al, 2016). However, on the one hand, water-use patterns of plants on the QTP only conducted on theAchnatherum splendens grassland (Jiang et al, 2021) and alpine riparian plants (Huawu et al, 2019), which both have an environment along the river and located in the west of QTP, on the other hand, many mechanisms and significance between shrubs and grasslands are not well understood, and little research on water-use patterns and relationships between shrubs and grasslands has been conducted on the north of QTP.…”

Section: Introductionmentioning

confidence: 99%

Stable isotope analysis of plant water and soil water across two vegetation types in the northern Qinghai-Tibet Plateau

Li¹,

Zhang²,

Du³

et al. 2022

Preprint

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Studying the interrelation of soil water and plant water is essential for an in-depth understanding of eco-hydrological processes. However, water use relationships and comparative studies between shrubs and alpine grassland of the northern Qinghai-Tibet Plateau remain poorly understood. In this study, we compared δ18O and δ2H values of water from soil, plant, precipitation, and groundwater between P. fruticosa shrub and alpine grassland locations at two neighboring sites in order to better understand the interface between plant and surrounding soils of shrubs and grasslands in the northern Qinghai-Tibet Plateau. Our results showed that δ18O and δ2H of soil water, precipitation, and plant water varied significantly over time and water sources in P. fruticosa shrub and alpine grassland sites. Both soil evaporation and plant transpiration at the P. fruticosa shrub site were relatively lower than they were at the alpine grassland site. Alpine grassland plant water had a stronger dynamic fractionation effect in the process of transportation and was more sensitive to environmental conditions. However, plants at the P. fruticosa shrub site displayed more flexible water use patterns, shifted their water sources between shallow soil water and deep soil water. Shrubs from alpine grassland leaded to changes in grassland water use, thereby changing soil water storage. The results of this study will provide theoretical basis for improving the availability and sustainability of soil water, provide guidance for meadow management from ecohydrological processes on the northern Qinghai-Tibet Plateau.

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“…Generally, plants can modify their water sources, transpiration rate, or leaf water status under changing conditions in order to cope with drought (Gow, Barrett, O'Grady, Renzullo, & Phinn, 2018). It has been demonstrated that tree species usually shift water use to deep-layer soil water Tang et al, 2018) or groundwater (Barbeta et al, 2015) during prolonged drought, by concentrating more fine roots at greater depths in order to avoid hydraulic failure (Wang, Huang, & Hu, 2020).…”

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confidence: 99%

Impact of land management practices on water use strategy for a dryland tree plantation and subsequent responses to drought

Zhao

2020

Land Degrad Dev

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Extreme droughts, of increased frequency due to climate change, are threatening the sustainability of dryland plantations worldwide by exacerbating water scarcity. Here we aim to disentangle the impacts of combinations of terracing and mulching on water use strategy and their response to extreme droughts in a rainfed jujube (Ziziphus jujuba Mill.) plantation on the semiarid Loess Plateau of China, using 3-year in situ field observations. Pruned jujube branches and maize straw were mulched on halfmoon terraces to form two combined treatments, referred to as JBT and MST, respectively. The efficacy of these two combinations on the water use strategy of jujube

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Subsurface water-use strategies and physiological responses of subtropical eucalypt woodland vegetation under changing water-availability conditions

Cited by 17 publications

References 70 publications

Water Use Characteristics of Populus euphratica Oliv. and Tamarix chinensis Lour. at Different Growth Stages in a Desert Oasis

Water Use Characteristics of Populus euphratica Oliv. and Tamarix chinensis Lour. at Different Growth Stages in a Desert Oasis

Stable isotope analysis of plant water and soil water across two vegetation types in the northern Qinghai-Tibet Plateau

Impact of land management practices on water use strategy for a dryland tree plantation and subsequent responses to drought

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