Eco-physiological behaviour of some mediterranean plants as suitable candidates for reclamation of degraded areas

Sakcali, Mehmet Serdal; Öztürk, Münir

doi:10.1016/s0140-1963(03)00099-5

Cited by 40 publications

(30 citation statements)

References 15 publications

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“…This is not surprising as the typical shrubs and trees of Mediterranean water-limited ecosystems are known to be highly tolerant to water content fluctuations and are usually slower to limit their water losses when compared to grasses [Larcher, 1995]. For instance, literature values indicate that the Olea can tolerate leaf water potentials as extreme as À2 to À3 MPa [Lo Gullo et al, 2003] and À6 MPa [Sakcali and Ozturk, 2004], and the types of Quercus in these regions can tolerate À2.5 to À6 MPa [Tognetti et al, 1998;Sakcali and Ozturk, 2004] without significant drop of leaf conductance, while minimal water potential values of these resistant shrubs may reach À8 MPa [Larcher, 1995]. These potentials correspond to extremely low values of q (0.07 -0.08), such as estimated by the van Genuchten's [1980] soil retention curve using the pedotransfer function of Carsel and Parrish [1988].…”

Section: Estimates Of the B Functionsmentioning

confidence: 99%

Soil moisture and vegetation controls on evapotranspiration in a heterogeneous Mediterranean ecosystem on Sardinia, Italy

Detto

Montaldo

Albertson

et al. 2006

Water Resources Research

201

241

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[1] Micrometeorological measurements of evapotranspiration (ET) can be difficult to interpret and use for validating model calculations in the presence of land cover heterogeneity. Land surface fluxes, soil moisture (q), and surface temperatures (T s ) data were collected by an eddy correlation-based tower located at the Orroli (Sardinia) experimental field (covered by woody vegetation, grass, and bare soil) from April 2003 to July 2004. Two Quickbird high-resolution images (summer 2003 and spring 2004) were acquired for depicting the contrasting land cover components. A procedure is presented for estimating ET in heterogeneous ecosystems as the residual term of the energy balance using T s observations, a two-dimensional footprint model, and the Quickbird images. Two variations on the procedure are successfully implemented: a proposed two-source random model (2SR), which treats the heat sources of each land cover component separately but computes the bulk heat transfer coefficient as spatially homogeneous, and a common two-source tile model. For 2SR, new relationships between the interfacial transfer coefficient and the roughness Reynolds number are estimated for the two bare soil-woody vegetation and grass-woody vegetation composite surfaces. The ET versus q relationships for each land cover component were also estimated, showing that that the woody vegetation has a strong tolerance to long droughts, transpiring at rates close to potential for even the driest conditions. Instead, the grass is much less tolerant to q deficits, and the switch from grass to bare soil following the rainy season had a significant impact on ET.

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Section: Estimates Of the B Functionsmentioning

confidence: 99%

Soil moisture and vegetation controls on evapotranspiration in a heterogeneous Mediterranean ecosystem on Sardinia, Italy

Detto

Montaldo

Albertson

et al. 2006

Water Resources Research

201

241

View full text Add to dashboard Cite

show abstract

“…This is not surprising as the typical shrubs and trees of Mediterranean water-limited ecosystems are known to be highly tolerant to water content fluctuations and are usually slow to limit their water losses (Larcher, 1995). For instance, literature values indicate that the Olea can tolerate leaf water potentials as extreme as −2 to −3 MPa (Lo Gullo et al, 2003) and −6 MPa (Sakcali and Ozturk, 2004), and the types of Quercus in these regions can tolerate −2.5 to −6 MPa (Tognetti et al, 1998;Sakcali and Ozturk, 2004) without significant drop of leaf conductance, while minimal water potential values of these resistant shrubs may reach −8 MPa (Larcher, 1995).…”

Section: Discussionmentioning

confidence: 98%

Vegetation dynamics and soil water balance in a water-limited Mediterranean ecosystem on Sardinia, Italy

Montaldo

Albertson

Mancini

2008

Hydrol. Earth Syst. Sci.

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Abstract. Mediterranean ecosystems are commonly heterogeneous savanna-like ecosystems, with contrasting plant functional types (PFTs, e.g. grass and woody vegetation) competing for water. Mediterranean ecosystems are also commonly characterized by strong inter-annual rainfall variability, which influences the distributions of PFTs that vary spatially and temporally. An extensive field campaign in a Mediterranean setting was performed with the objective to investigate interactions between vegetation dynamics, soil water budget and land-surface fluxes in a water-limited ecosystem. Also a vegetation dynamic model (VDM) is coupled to a 3-component (bare soil, grass and woody vegetation) Land surface model (LSM). The case study is in Orroli, situated in the mid-west of Sardegna within the Flumendosa river basin. The landscape is a mixture of Mediterranean patchy vegetation types: trees, including wild olives and cork oaks, different shrubs and herbaceous species. Land surface fluxes, soil moisture and vegetation growth were monitored during the May 2003-June 2006 period. Interestingly, hydrometeorological conditions of the monitored years strongly differ, with dry and wet years in turn, such that a wide range of hydrometeorological conditions can be analyzed. The coupled VDM-LSM model is successfully tested for the case study, demonstrating high model performance for the wide range of eco-hydrologic conditions. Results demonstrate also that vegetation dynamics are strongly influenced by the inter-annual variability of atmospheric forcing, with grass leaf area index changing significantly each spring season according to seasonal rainfall amount.

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“…Spiegel-Roy et al (1977) and Lin et al (1984) described PA as an adapted species for very severe conditions and dry areas where higher stomatal control is exerted by PA compared to PI and PT. PT compared to other Mediterranean plants was considered by Sakcali & Ozturk (2004) as a water spender and described it as a partially water-tolerant species which cannot sustain long in harsh conditions. These results differ from those reported by Germana (1997) and Gijón et al (2010) for potted pistachio plants, where PA is considered as a rootstock with little stomatal control compared to PT.…”

Section: Influence Of Rootstock On Pistachio Water Relationsmentioning

confidence: 99%

Impacts of water stress, environment and rootstock on the diurnal behaviour of stem water potential and leaf conductance in pistachio (Pistacia vera L.)

Memmi

Couceiro

Gijón

et al. 2016

Span. j. agric. res.

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change in the type of orchard management, with the aim of increasing yield mainly by transforming pistachio from a traditionally rainfed cultivated crop to an irrigated crop. However, the negative balance between water needs and its availability has provoked the claim of deficit irrigation strategies to maximize the rate of returns in front of water availability. Consequently, precision in irrigation has taken another level and the recourse to the study of the different mechanisms connecting the tree water relations to water deficit strate- RESEARCH ARTICLE OPEN ACCESS AbstractLittle information is available on the diurnal behaviour of water potential and leaf conductance on pistachio trees despite their relevance to fine tune irrigation strategies. Mature pistachio trees were subject to simultaneous measurements of stem water potential (Ψ x ) and leaf conductance (g l ) during the day, at three important periods of the irrigation season. Trees were grown on three different rootstocks and water regimes. An initial baseline relating Ψ x to air vapor pressure deficit (VPD) is presented for irrigation scheduling in pistachio. Ψ x was closely correlated with VPD but with a different fit according to the degree of water stress. No evidence of the variation of Ψ x in relation to the phenology of the tree was observed. Furthermore, midday Ψ x showed more accuracy to indicate a situation of water stress than predawn water potential. Under well irrigated conditions, g l was positively correlated with VPD during stage II of growth reaching its peak when VPD reached its maximum value (around 4 kPa). This behaviour changed during stage III of fruit growth suggesting a reliance of stomatal behaviour to the phenological stage independently to the tree water status. The levels of water stress reached were translated in a slow recovery of tree water status and leaf conductance (more than 40 days). Regarding rootstocks, P. integerrima showed little adaptation to water shortage compared to the two other rootstocks under the studied conditions. Additional key words: diurnal pattern; Pistacia atlantica; Pistacia integerrima; Pistacia terebinthus; water stress recovery. Abbreviations used: ETa (actual crop evapotranspiration, in mm); ETc (potential crop evapotranspiration, in mm); ETo (reference evapotranspiration, in mm); Kc (crop coefficient); Kr (reduction coefficient); PA (Pistacia atlantica Desf.); PI (Pistacia integerrima L.); PT (Pistacia terebinthus L.); RDI (regulated deficit irrigation); VPD (air vapor pressure deficit, in kPa); Ψ x (stem water potential, in MPa);g l (leaf conductance, in mmol/m 2 ·s).

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Eco-physiological behaviour of some mediterranean plants as suitable candidates for reclamation of degraded areas

Cited by 40 publications

References 15 publications

Soil moisture and vegetation controls on evapotranspiration in a heterogeneous Mediterranean ecosystem on Sardinia, Italy

Soil moisture and vegetation controls on evapotranspiration in a heterogeneous Mediterranean ecosystem on Sardinia, Italy

Vegetation dynamics and soil water balance in a water-limited Mediterranean ecosystem on Sardinia, Italy

Impacts of water stress, environment and rootstock on the diurnal behaviour of stem water potential and leaf conductance in pistachio (Pistacia vera L.)

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