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In the rhizospheres of three gypsophytes and in non-rhizospheric soil, two samplings were carried out - the first during a summer drought and the second during spring - to detect the responses to the availability of water in the soil. Urease and protease showed higher values after the drought whereas β-glucosidase was highest in the spring. This pattern was the same for all the rhizospheres tested. However, the arylsulfatase and alkaline phosphatase did not change. Surprising results were obtained when water retention and water loss were studied, with the highest values being obtained for the dry season due to the association of Cyanoprokaryota with the rhizospheres. The results are also explained by two water pulses that occurred before the samplings. Several parameters, whose values changed markedly due to the microbiological activation just after the drought and water pulses, are proposed as indicators of this activation: microbial biomass carbon and basal respiration rate, together with urease and protease. However, it was the dehydrogenase activity in spring that best reflected the microbiology associated with the carbon cycle, together with β-glucosidase. The interrelationships between carbon and nitrogen were shown through the indices: water soluble nitrogen and water soluble carbon. We propose three functional adaptation mechanisms of these plants associated with the Cyanoprokaryota in their rhizospheres and related to the water availability as determined by drought and water pulse effects. Herniaria fruticosa is a pioneer with the greatest diversity of Cyanoprokaryota, in both summer and spring (10 species and 11 species, respectively), and with high-medium abundance (5-30%). Teucrium balthazaris exhibits an intermediate strategy, with greater diversity of Cyanoprokaryota in spring (7 species) and predominance of high-medium abundance (5-30%). Finally, Helianthemum squamatum has lower diversity, with one species in summer (with low abundance, <5%) and no species in spring.
E. Díaz-Pereira; P. Marín Sanleandro; A.D. Asencio. Effects of drought and water pulses on microbial functionality and the role of Cyanoprokaryota in the rhizospheres of gypsophytes. Science of The Total Environment 2019, 691, 919 -932.
AMA StyleE. Díaz-Pereira, P. Marín Sanleandro, A.D. Asencio. Effects of drought and water pulses on microbial functionality and the role of Cyanoprokaryota in the rhizospheres of gypsophytes. Science of The Total Environment. 2019; 691 ():919-932.
Chicago/Turabian StyleE. Díaz-Pereira; P. Marín Sanleandro; A.D. Asencio. 2019. "Effects of drought and water pulses on microbial functionality and the role of Cyanoprokaryota in the rhizospheres of gypsophytes." Science of The Total Environment 691, no. : 919-932.
In the present work, a sampling grid of the urban core of the city of Murcia (South East Spain) was designed in order to analyze street dust, focusing on the contents of the heavy metals Cd, Cr, Cu, Ni, Pb, and Zn and their relationships with the color of the sample, the traffic pattern, and the location where they were sampled (sidewalks, ledges, and roads). The characterization of the samples was carried out by X-ray diffraction and scanning electron microscopy, whereas the heavy metals were extracted by acid digestion and determined by inductively coupled plasma mass spectrometry. The concentration (mg/kg) in urban dust of the city of Murcia was highest for Zn (653), followed by Cu (201) > Pb (177) > Cr (117) > Ni (51) >> Cd (0.5). The color expounded statistically significant differences with regard to the heavy metals, including the pollutant load. The same pattern was found when the classification variable was the traffic intensity, except in the case of Ni. The areas with a higher risk of contamination by heavy metals in the urban dust are the ledges of narrow city center streets with moderate traffic, where Zn and Pb seem to accumulate most greatly.
Pura Marín Sanleandro; Antonio Sánchez Navarro; Elvira Díaz-Pereira; Francisco Bautista Zuñiga; Miriam Romero Muñoz; María José Delgado Iniesta. Assessment of Heavy Metals and Color as Indicators of Contamination in Street Dust of a City in SE Spain: Influence of Traffic Intensity and Sampling Location. Sustainability 2018, 10, 4105 .
AMA StylePura Marín Sanleandro, Antonio Sánchez Navarro, Elvira Díaz-Pereira, Francisco Bautista Zuñiga, Miriam Romero Muñoz, María José Delgado Iniesta. Assessment of Heavy Metals and Color as Indicators of Contamination in Street Dust of a City in SE Spain: Influence of Traffic Intensity and Sampling Location. Sustainability. 2018; 10 (11):4105.
Chicago/Turabian StylePura Marín Sanleandro; Antonio Sánchez Navarro; Elvira Díaz-Pereira; Francisco Bautista Zuñiga; Miriam Romero Muñoz; María José Delgado Iniesta. 2018. "Assessment of Heavy Metals and Color as Indicators of Contamination in Street Dust of a City in SE Spain: Influence of Traffic Intensity and Sampling Location." Sustainability 10, no. 11: 4105.
The systematic use of magnetic techniques for the characterization of soils is still scarce despite its great potential for the identification of pedogenetic processes. The main objective of this study is to analyze the magnetic properties of a soil profile with contrasting horizons and try to relate them to the properties determined through conventional techniques. The horizons of a soil profile located in a tectonic depression in Murcia, Spain are described and their physical, chemical, and mineralogical properties analyzed with conventional techniques. The following magnetic properties are included in the study: the mass-specific magnetic susceptibility, frequency-dependent susceptibility, continuous thermomagnetic curves at low field, isothermal remanent magnetization acquisition and the estimation of magnetic hardness (coercitivity) through the parameter S-200. Detailed description of the soil profile and the results of conventional analyses allowed the identification of a mollic horizon, an argic horizon, and a calcic horizon, as well as a textural discontinuity. Apparently, pedogenic magnetite occurs in the A horizon and is responsible for the magnetization in most cases. The magnetic carriers in the Bt horizons are superparamagnetic particles and they are related to the high percentage of clay. High coercivity minerals (hematite and probably goethite) were detected in different concentrations in all soil horizons. The amount of ferrimagnetic minerals decreases with depth. The magnetic properties allowed a better characterization of the diagnostic horizons. The results and information derived from the analysis of the magnetic properties could not be obtained using conventional soil analysis only.
Francisco Bautista; Maria Felicidad Bógalo; Antonio Sánchez Navarro; Avto Goguitchaichvili; María José Delgado Iniesta; Ruben Cejudo; Purificación Marín Sanleandro; Juana María Gil; Elvira Díaz-Pereira. Magnetic and pedological characterisation of a paleosol under aridic conditions in Spain. Studia Geophysica et Geodaetica 2017, 62, 139 -166.
AMA StyleFrancisco Bautista, Maria Felicidad Bógalo, Antonio Sánchez Navarro, Avto Goguitchaichvili, María José Delgado Iniesta, Ruben Cejudo, Purificación Marín Sanleandro, Juana María Gil, Elvira Díaz-Pereira. Magnetic and pedological characterisation of a paleosol under aridic conditions in Spain. Studia Geophysica et Geodaetica. 2017; 62 (1):139-166.
Chicago/Turabian StyleFrancisco Bautista; Maria Felicidad Bógalo; Antonio Sánchez Navarro; Avto Goguitchaichvili; María José Delgado Iniesta; Ruben Cejudo; Purificación Marín Sanleandro; Juana María Gil; Elvira Díaz-Pereira. 2017. "Magnetic and pedological characterisation of a paleosol under aridic conditions in Spain." Studia Geophysica et Geodaetica 62, no. 1: 139-166.
Antonio Sánchez Navarro; J.M. Gil-Vázquez; Maria José Delgado; Pura Marín Sanleandro; M. Arantzazu Blanco Bernardeau; R. Ortiz-Silla. Establishing an index and identification of limiting parameters for characterizing soil quality in Mediterranean ecosystems. CATENA 2015, 131, 35 -45.
AMA StyleAntonio Sánchez Navarro, J.M. Gil-Vázquez, Maria José Delgado, Pura Marín Sanleandro, M. Arantzazu Blanco Bernardeau, R. Ortiz-Silla. Establishing an index and identification of limiting parameters for characterizing soil quality in Mediterranean ecosystems. CATENA. 2015; 131 ():35-45.
Chicago/Turabian StyleAntonio Sánchez Navarro; J.M. Gil-Vázquez; Maria José Delgado; Pura Marín Sanleandro; M. Arantzazu Blanco Bernardeau; R. Ortiz-Silla. 2015. "Establishing an index and identification of limiting parameters for characterizing soil quality in Mediterranean ecosystems." CATENA 131, no. : 35-45.
Asunción Romero Díaz; P. Marín-Sanleandro; R. Ortiz-Silla. Loss of soil fertility estimated from sediment trapped in check dams. South-eastern Spain. CATENA 2012, 99, 42 -53.
AMA StyleAsunción Romero Díaz, P. Marín-Sanleandro, R. Ortiz-Silla. Loss of soil fertility estimated from sediment trapped in check dams. South-eastern Spain. CATENA. 2012; 99 ():42-53.
Chicago/Turabian StyleAsunción Romero Díaz; P. Marín-Sanleandro; R. Ortiz-Silla. 2012. "Loss of soil fertility estimated from sediment trapped in check dams. South-eastern Spain." CATENA 99, no. : 42-53.
This study aims to identify some of the factors contributing to the piping process in abandoned terraces in seven sites located in the Murcia Region (southeast Spain). The local landscape has the appearance of badland geomorphology, possessing deep valleys which until the 1970s were terraced and cultivated. The terraces have now been abandoned to the piping process. The research focuses on the relationship between the size and position of pipes and the physical and geochemistry properties of the local highly dispersive marl lithology; and the extent to which the reworking of the materials for terrace cultivation has exacerbated piping erosion. Morphologically, the terracing in the stream beds has resulted in a series of gentle benches separated by steeper risers with variable ‘drop’, (riser height). A series of flat infiltration surfaces result, and because the resculpting produces a reduced bulk density infill with enhanced throughflow, infiltrating water is forced along steep hydraulic gradients to a low outfall at the base of the riser. Paralleling studies of land levelling and terrace abandonment in similar materials elsewhere, piping in the study area is shown to be closely related to the physical and chemical characteristics of the materials its sodicity and dispersive character. Considerable differences in structure, texture, mineralogical composition and material's surface crust and subsoil geochemical properties emerged from ‘site signature’ plots, and these results suggest that agricultural processes affect the dispersive character of the crust materials, presumably because agricultural activity increases the buffering effect of organic acids on the dispersed clay. This is supported by the observation that on the one site that was levelled but not used for agriculture, a stable organically-distinct crust like the abandoned agricultural sites has not formed. The changes to the material's aggregate stability and bulk density properties when terracing occurs is examined, but insufficient evidence is available from the data collected to unpick the causes of aggregate stability changes in the study plots. The way in which differences between crust and subsoil enhance infiltration is discussed, and the role of the terrace ‘drop’ in influencing hydraulic gradients and pipe development is illustrated. A possible index to describe the relationship between evacuated material volumes and the controlling parameters discussed above is tested. It is concluded that terracing which is intended as a conservation practice has, in dispersive materials, actually enhanced piping, leading to the abandonment of farming.
A. Romero Díaz; P. Marín Sanleandro; A. Sánchez Soriano; Francisco Belmonte-Serrato; H. Faulkner. The causes of piping in a set of abandoned agricultural terraces in southeast Spain. CATENA 2007, 69, 282 -293.
AMA StyleA. Romero Díaz, P. Marín Sanleandro, A. Sánchez Soriano, Francisco Belmonte-Serrato, H. Faulkner. The causes of piping in a set of abandoned agricultural terraces in southeast Spain. CATENA. 2007; 69 (3):282-293.
Chicago/Turabian StyleA. Romero Díaz; P. Marín Sanleandro; A. Sánchez Soriano; Francisco Belmonte-Serrato; H. Faulkner. 2007. "The causes of piping in a set of abandoned agricultural terraces in southeast Spain." CATENA 69, no. 3: 282-293.
P. Brotóns Gallardo; C.N. Martínez Cano; A. Faz Cano; P. Marín Sanleandro. PEDOLOGICAL CHARACTERIZATION OF FIG PLANTATION IN THE SOUTHEAST OF ELCHE (ALICANTE, S.E. SPAIN). Acta Horticulturae 2003, 295 -300.
AMA StyleP. Brotóns Gallardo, C.N. Martínez Cano, A. Faz Cano, P. Marín Sanleandro. PEDOLOGICAL CHARACTERIZATION OF FIG PLANTATION IN THE SOUTHEAST OF ELCHE (ALICANTE, S.E. SPAIN). Acta Horticulturae. 2003; (605):295-300.
Chicago/Turabian StyleP. Brotóns Gallardo; C.N. Martínez Cano; A. Faz Cano; P. Marín Sanleandro. 2003. "PEDOLOGICAL CHARACTERIZATION OF FIG PLANTATION IN THE SOUTHEAST OF ELCHE (ALICANTE, S.E. SPAIN)." Acta Horticulturae , no. 605: 295-300.
A. Faz Cano; A.L. Alarcón Vera; P. Marín Sanleandro; M.á. Muñoz García. CHANGES UNDERGONE IN STRUCTURE AND AGRICULTURAL PRACTICES OF MAZARRON (MURCIA) DURING THE LAST TWENTY YEARS DUE TO THE EXPANSION OF GREENHOUSE CULTIVATION. Acta Horticulturae 2001, 719 -724.
AMA StyleA. Faz Cano, A.L. Alarcón Vera, P. Marín Sanleandro, M.á. Muñoz García. CHANGES UNDERGONE IN STRUCTURE AND AGRICULTURAL PRACTICES OF MAZARRON (MURCIA) DURING THE LAST TWENTY YEARS DUE TO THE EXPANSION OF GREENHOUSE CULTIVATION. Acta Horticulturae. 2001; (559):719-724.
Chicago/Turabian StyleA. Faz Cano; A.L. Alarcón Vera; P. Marín Sanleandro; M.á. Muñoz García. 2001. "CHANGES UNDERGONE IN STRUCTURE AND AGRICULTURAL PRACTICES OF MAZARRON (MURCIA) DURING THE LAST TWENTY YEARS DUE TO THE EXPANSION OF GREENHOUSE CULTIVATION." Acta Horticulturae , no. 559: 719-724.
The authors study clay mineral and main nutrient element losses in runoff water generated by rainfall events in 1990–1991 from five field plots on a Petric Calcisol or Xerollic Paleorthid. Illite is the main layer silicate in the clay Ap horizon, with a smaller proportion of kaolinite and a minor amount of chlorite and smectite. Soil samples taken in different seasons show that plots under shrub vegetation are very much alike and, with the exception of available Fe, Cu, Mn and Zn, they are markedly different from arable soil plots, being much richer in organic C, total N and available K, but poorer in available P. Annual and seasonal losses of the main nutrient elements are small, with the highest amounts in the plots cultivated for barley and with cut shrub; losses are extremely low for the plot with shrub cover.
L.J. Alías; F. López-Bermúdez; Pura Marín Sanleandro; Asunción Romero Díaz; J. Martínez. Clay minerals and soil fertility loss on Petric Calcisol under a semiarid Mediterranean environment. Soil Technology 1997, 10, 9 -19.
AMA StyleL.J. Alías, F. López-Bermúdez, Pura Marín Sanleandro, Asunción Romero Díaz, J. Martínez. Clay minerals and soil fertility loss on Petric Calcisol under a semiarid Mediterranean environment. Soil Technology. 1997; 10 (1):9-19.
Chicago/Turabian StyleL.J. Alías; F. López-Bermúdez; Pura Marín Sanleandro; Asunción Romero Díaz; J. Martínez. 1997. "Clay minerals and soil fertility loss on Petric Calcisol under a semiarid Mediterranean environment." Soil Technology 10, no. 1: 9-19.