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Martínez, Feliciano; Merino, O.; Martín, Ángel Puerto; Martín, Daniel; Merino, J.

doi:10.1023/a:1004389329411

Cited by 49 publications

(9 citation statements)

References 27 publications

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“…Moreover, nutrient availability is known to change along soil moisture gradients, with a maximum in mesic soils and minimum in very dry conditions (Araya, Gowing, & Dise, 2013;Saha, Sternberg, & Miralles-Wilhelm, 2009). Thus, the fine-scale hydrological gradient present in our study area can be also linked to N conditions (Gallardo & Merino, 1993;Martínez, Merino, Martín, García Martín, & Merino, 1998;Serrano, Calzada-Bujak, & Toja, 2003), which plant δ 15 N could reflect (Bedard-Haughn, van Groenigen, & van Kessel, 2003;Handley et al, 1999).…”

Section: Woody Vegetation Physiological Responses To Increasing Depmentioning

confidence: 79%

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: Woody Vegetation Physiological Responses To Increasing Depmentioning

confidence: 79%

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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“…The high P return observed for CL is in agreement with that reported by Núñez-Olivera et al (1993) for the same species (3.5 kg P ha −1 year −1 ), and it is very interesting from an ecological point of view and also for the future management of extensive oak woodlands and Mediterranean rangelands. It suggests that CL may have stronger capacity than CS to improve P availability in soils, which may be beneficial for trees in the encroached early phase and to promote soil quality in degraded areas, since P can be a limiting bio-element in Mediterranean shrub communities, as observed by Martínez et al (1998).…”

Section: Annual Potential Return Of Bio-elementsmentioning

confidence: 95%

“…CS occurs over almost the whole Mediterranean basin and is widespread throughout the Iberian Peninsula, while CL is restricted to the south of France, the western half of the Iberian Peninsula and northern Africa (Morocco and Algeria) (Castroviejo et al 1993). They inhabit nutrient-poor or degraded dry soils, either siliceous (granite or schist) or calcareous (Castroviejo et al 1993), although CS prefers sandy soils (Martín Bolaños and Guinea López 1949). Both species multiply naturally by seed and possess an opportunistic strategy of seed germination, associated with the early post-disturbance successional stages (Pérez-García 1997).…”

Section: Study Speciesmentioning

confidence: 99%

“…fire, wood cutting or agriculture abandonment) and subsequent erosion of the upper layer of the soils (Bastida and Talavera 2002). Although CL has a less developed root system than CS (Martín Bolaños and Guinea López 1949), they are both shallow-rooted, which favours their good colonizing capacity in xeric and highly disturbed areas (Correia et al 1992;Zunzunegui et al 2005).…”

Section: Study Speciesmentioning

confidence: 99%

“…Cistus salviifolius L. and C. ladanifer L. are undoubtedly the most representative species in oak woodland areas degraded by previous cereal crops and livestock overgrazing (Martín Bolaños and Guinea López 1949). Several studies developed at tree level in Mediterranean oak woodlands, including Portugal (Nunes 2004), have shown that trees provide carbon sequestration and enhance SOM and nutrient pools beneath the canopies, preventing thus soil erosion and land degradation.…”

Section: Introductionmentioning

confidence: 99%

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Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Simões

Madeira²,

Gazarini

2009

Plant Soil

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To assess the ecological function of Cistus salviifolius (CS) and C. ladanifer (CL) shrubs in evergreen oak woodlands, a study was conducted over a 4-year period in southern Portugal. Annual potential return of bio-elements to the soil through litterfall and throughfall, and necromass on soil surface under shrub canopies were assessed along with the dynamics of leaf litter decomposition. Soil bulk density and soil-water retention at different soil matric potential were measured at 0-5 and 5-10 cm depth, and soil chemical properties were determined at 0-5, 5-10, 10-20 and 20-30 cm depth beneath canopies and at barren spaces. Litterfall was higher for CL (4.4-4.6 Mg DM ha−1 year−1) than for CS (3.3-3.8 Mg DM ha−1 year−1). Annual amount of N returned to the soil through litterfall of CS (22.9 kg N ha−1 year−1) was higher than by that of CL (17.2 kg N ha−1 year−1), whereas the return of P in CL (4.1 kg P ha−1 year−1) was higher than in CS (2.1 kg P ha−1 year−1). Leaf decomposition was faster for CS (k= −0.87) than for CL (k=−0.44). N release was also faster for CS than for CL, while that of P was much faster for CL than for CS. Throughfall proportions were 61% of bulk rainfall for CS and 79% for CL. Annual return of Cl−, K+, Ca2+ and Mg2+ by throughfall was more pronounced for CL than for CS. Shrubs improved soil quality, especially in the 0-5 cm top soil layer, by enhancement of organic matter and nutrient content beneath shrub canopies. Therefore, shrubs may promote the invasion of more demanding species, since local areas of high fertility are likely to be favoured sites for vegetation regeneration.

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Cotton: Genetic Improvement for Drought Stress Tolerance – Current Status and Research Needs

abou-kheir

Sheshshayee

Prasad

et al. 2012

Improving Crop Resistance to Abiotic Stress

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Untitled

Cited by 49 publications

References 27 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

Ability of Cistus L. shrubs to promote soil rehabilitation in extensive oak woodlands of Mediterranean areas

Cotton: Genetic Improvement for Drought Stress Tolerance – Current Status and Research Needs

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