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Pyrolytic descriptors of the effect of parent material, climate conditions and vegetation type on soil biogeochemical quality in Mediterranean soils from Sierra de Cazorla-Segura-Las Villas Natural Park

V. Aranda,Cecilio Oyonarte,Luis Manuel Cuadra,Emilia Fernández Ondoño,Gonzalo Almendros Martín-2008-05-18-DIGITAL.CSIC (Spanish National Research Council (CSIC))
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TL;DRAbstract

A study was carried out on structural characteristics of the soil humic acid in surface horizons of soils from different geological (mainly calcareous rocks) and ecophysiological characteristics in a Natural Park of great environmental interest under Mediterranean climate in Southeast Spain. The mean annual temperature is 11 ºC, the mean annual rainfall is about 866 mm, the altitude in sites sampled ranged between 700 to over 1780 m.a.s.l., and the slope between 4 and 57%. The vegetation consisted of sclerophyllic (oak) forest, pine forests or dense shrubs (coverage of 75% or more). Analytical pyrolysis was carried out in a Pyrojector (SGE instruments) connected to a GC/MS system Finnigan Trace GC Ultra with a Trace DSQ mass spectrometer and HP-1 capillary column (30 m × 250 ¿m). Humic acid samples from scrubland showed comparatively simple pyrograms, in some cases comparable to those from sclerophyllic oak forest, which is interpreted as an efficient biogeochemical transformation prob

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A study was carried out on structural characteristics of the soil humic acid in surface horizons of soils from different geological (mainly calcareous rocks) and ecophysiological characteristics in a Natural Park of great environmental interest under Mediterranean climate in Southeast Spain. The mean annual temperature is 11 ºC, the mean annual rainfall is about 866 mm, the altitude in sites sampled ranged between 700 to over 1780 m.a.s.l., and the slope between 4 and 57%. The vegetation consisted of sclerophyllic (oak) forest, pine forests or dense shrubs (coverage of 75% or more). Analytical pyrolysis was carried out in a Pyrojector (SGE instruments) connected to a GC/MS system Finnigan Trace GC Ultra with a Trace DSQ mass spectrometer and HP-1 capillary column (30 m × 250 ¿m). Humic acid samples from scrubland showed comparatively simple pyrograms, in some cases comparable to those from sclerophyllic oak forest, which is interpreted as an efficient biogeochemical transformation prob

Keywords

AlmeriaMediterranean climateVegetation (pathology)ForestrySoil waterHumusBiogeochemical cycleGeography

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