Water source partitioning among plant functional types in a semi‐arid dune ecosystem

Antunes, Cristina; Díaz‐Barradas, Mari Cruz; Zunzunegui, María; Vieira, Simone A.; Máguas, Cristina

doi:10.1111/jvs.12647

Cited by 32 publications

(23 citation statements)

References 71 publications

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“…Fifteen woody plant species, with distinct functional characteristics (Díaz Barradas, Zunzunegui, Tirado, Ain‐Lhout, & García Novo, ), were considered, and a total of 191 plants were sampled (Table ). In a previous study (Antunes, Díaz‐Barradas, Zunzunegui, Vieira, & Máguas, ), these species clustered in five water‐use functional groups, with distinct summer water‐use patterns, exploring soil water from shallower to deeper soil layers. The species in this study and their respective functional type classification are described in Table .…”

Section: Methodsmentioning

confidence: 72%

“…Lignified woody stems of each individual selected for physiological measurements were also collected at the same dates of soil sampling (2–10 September 2013). Soil and twig sampling, storage and water extraction by vacuum distillation followed the methodology detailed in Antunes, Díaz‐Barradas, Zunzunegui, Vieira, and Máguas (), Ehleringer and Dawson (), West, Hultine, Jackson, and Ehleringer (). Oxygen stable isotope ratio analysis of all water samples was performed by headspace equilibration, on an Isoprime (Micromass, UK) IRMS, coupled in continuous flow mode to a Multiflow (Micromass, UK) auto‐sampler and sample equilibration system.…”

Section: Methodsmentioning

confidence: 99%

“…The relative contribution of different water sources to the composition of the xylem water was estimated by individual‐based Bayesian stable isotope mixing models, using the graphical user interface and model framework MixSIAR for R (Parnell et al., ; Stock & Semmens, ), as described in Antunes, Díaz‐Barradas, Zunzunegui, Vieira, and Máguas () (and Supporting Information Appendix S1).…”

Section: Methodsmentioning

confidence: 99%

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Groundwater drawdown drives ecophysiological adjustments of woody vegetation in a semi‐arid coastal ecosystem

Antunes

Chozas

West

et al. 2018

Global Change Biology

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Predicted droughts and anthropogenic water use will increase groundwater lowering rates and intensify groundwater limitation, particularly for Mediterranean semi-arid ecosystems. These hydrological changes may be expected to elicit differential functional responses of vegetation either belowground or aboveground. Yet, our ability to predict the impacts of groundwater changes on these ecosystems is still poor. Thus, we sought to better understand the impact of falling water table on the physiology of woody vegetation. We specifically ask (a) how is woody vegetation ecophysiological performance affected by water table depth during the dry season? and (b) does the vegetation response to increasing depth to groundwater differ among water-use functional types? We examined a suite of physiological parameters and water-uptake depths of the dominant, functionally distinct woody vegetation along a water-table depth gradient in a Mediterranean semi-arid coastal ecosystem that is currently experiencing anthropogenic groundwater extraction pressure. We found that groundwater drawdown did negatively affect the ecophysiological performance of the woody vegetation. Across all studied environmental factors, depth to groundwater was the most important driver of ecophysiological adjustments. Plant functional types, independent of groundwater dependence, showed consistent declines in water content and generally reduced C and N acquisition with increasing depths to groundwater. Functional types showed distinct operating physiological ranges, but common physiological sensitivity to greater water table depth. Thus, although differences in water-source use exist, a physiological convergence appeared to happen among different functional types. These results strongly suggest that hydrological drought has an important impact on fundamental physiological processes, constraining the performance of woody vegetation under semi-arid conditions. By disentangling the functional responses and vulnerability of woody vegetation to groundwater limitation, our study establishes the basis for predicting the physiological responses of woody vegetation in semi-arid coastal ecosystems to groundwater drawdown.

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Section: Methodsmentioning

confidence: 72%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Groundwater drawdown drives ecophysiological adjustments of woody vegetation in a semi‐arid coastal ecosystem

Antunes

Chozas

West

et al. 2018

Global Change Biology

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“…Invasive plants often have major impacts on water resources throughout an ecosystem and SIA can be used to investigate these (Antunes, Diaz‐Barradas, Zunzunegui, Vieira, & Maguas, ). Researchers measured the 18 O in xylem water and used a mixing model to partition the contribution of precipitation versus ground water in invasive acacia in Europe and showed that the species exhibits large seasonally plastic responses (Maguas et al, ).…”

Section: Plants and Soilsmentioning

confidence: 99%

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

et al. 2019

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1. What makes some species successful invaders while others fail, and why some invaders have major impacts in invaded ecosystems are pivotal questions that are attracting major research effort. The increasing availability of high resolution, georeferenced stable isotope landscapes ('isoscapes'), coupled with the commercialization of stable isotope-enriched tracer molecules and the development of new analytical approaches, is facilitating novel applications of stable isotope techniques in ecology.We can now address ecological questions that were previously intractable.2. We review and discuss how stable isotope analysis (SIA) can complement fundamental research themes in the study of biological invasions, especially in answering questions relating to the physiological and ecological mechanisms underlying invasion processes and invader impacts.3. SIA was first used for simply describing the diet of invaders but, more recently, SIA-informed metrics of population and community trophic structure have been advanced. These approaches now permit the comparison of diets across space and time and provide quantitative tools to compare food webs across different stages of invasion.4. SIA has also been pivotal in quantifying competition for resources between native and non-native species (e.g. competition for food, water, or nutrient use). Specific questions related to modes of dispersal (e.g. origin and distance/direction travelled) and mechanisms of establishment can also be addressed using SIA in diverse taxa.5. An overarching goal is to highlight examples of recent studies that have used SIA in key areas of invasion ecology and use these to synthesize testable predictions where SIA could be applied to future studies. We conclude by highlighting several paths forward and describing how unresolved challenges in quantifying the rates, impacts, and mechanisms underlying invasions could potentially benefit from the use of SIA. | 197Methods in Ecology and Evoluঞon MCCUE Et al.

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“…Rain amount not only affects the depth and time of water infiltration into soil (Yang et al, 2014) but also affects the contribution of rainwater to plant growth (Duan et al, 2008). The interspecific difference of rain amount that plants use is related to their life forms (Dodd et al, 1998;Antunes et al, 2018). Annual plants initially use small rain (2−5 mm).…”

Section: Introductionmentioning

confidence: 99%

Rainwater Use Process of Caragana intermedia in Semi-Arid Zone, Tibetan Plateau

Zhu

Wang

2020

Front. Earth Sci.

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Summer rain is changeable in the semi-arid climate and is the limiting factor to the survival and growth of sand-fixing vegetation, especially in the Tibetan Plateau. Caragana intermedia is the dominant sand-binding shrub on a sand dune in the northeast Tibetan Plateau. Stable hydrogen and oxygen isotopes of xylem water, soil water, and groundwater were examined to study the rainwater uptake process by C. intermedia in midsummer. Soil water content was monitored continuously before and after a 13.9-mm rain. Contribution of each water source was analyzed by the MixSIAR model. The results showed that the surface soil water (0−10 cm) was replenished by rainwater through increasing soil water content and reducing its stable isotope. Caragana intermedia mainly used surface soil water (0−10 cm) replenished by rainwater one day after the rain, accounting for about 60% of its total water source. As water availability decreased in upper soil layers, it used soil water at deeper levels (10−150 cm), the same water source as that one day before the rain. The rapid and efficient uptake of rainwater by C. intermedia reflected its response to summer rain, which is an adaptive strategy to the semi-arid environment. Therefore, C. intermedia could survive on a sand dune by shallow soil water replenished from rainwater in the Tibetan Plateau.

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Water source partitioning among plant functional types in a semi‐arid dune ecosystem

Cited by 32 publications

References 71 publications

Groundwater drawdown drives ecophysiological adjustments of woody vegetation in a semi‐arid coastal ecosystem

Groundwater drawdown drives ecophysiological adjustments of woody vegetation in a semi‐arid coastal ecosystem

Using stable isotope analysis to answer fundamental questions in invasion ecology: Progress and prospects

Rainwater Use Process of Caragana intermedia in Semi-Arid Zone, Tibetan Plateau

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