Soil microbial activity in three evergreen oak (Quercus ilex) woods in a mediterranean area

Papa, Stefania; Curcio, Elena; Lombardi, Ana Teresa; D'Oriano, P.; Fioretto, A.

doi:10.1016/s0166-2481(02)80020-4

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…On the other hand, an altered soil metabolism has important implications on the terrestrial ecosystem and nutrient recycle. The characteristics of the park soil mirror those found in literature (Papa et al 2002;Pinzari et al 2000). Although soil pH influences the availability of metals and their toxicity (Khan and Scullion 2000), the soil biological activity inside the urban park in Caserta does not seem to be linked to pH, as in all study sites, but to the organic carbon content, that is the principal constituent of the soil organic substance and represents the greater source of energy for the microorganism activity.…”

Section: Discussionsupporting

confidence: 82%

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Microbial activities and trace element contents in an urban soil

Papa¹,

Bartoli²,

Pellegrino³

et al. 2009

Environ Monit Assess

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110

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Soil biological properties are influenced by trace metals. The main sources of these pollutants in the urban areas are industrial plants, power stations, domestic heating systems and motor vehicles. The aim of this work was to evaluate, in relation to distance from urban roads, soil trace metal concentrations (Pb, Cu, Cr, Cd and V) and their influence on C-microbial biomass as well as on soil respiration and enzyme activities (phosphatase glucosidase, galactosidase, xylanase, cellulase, trealase, protease and invertase). The samplings were carried out at four sites, along a route that goes from Giannone Street to Passionisti Street, two heavily travelled roads at two different times of the year (spring and autumn). Heavy metal contents and microbial activities were highest at the sites near the roads. The highest values of microbial activities were found in the inner site; here, on the contrary, the lowest concentrations of heavy metals were measured. Significant and negative correlations were found between microbial activity and heavy metal contents.

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Section: Discussionsupporting

confidence: 82%

“…This was comparable to natural ecosystems, such as evergreen oak woods of Mediterranean area (Papa et al 2002). Nevertheless, the content was different from site to site.…”

Section: Discussionsupporting

confidence: 70%

Microbial activities and trace element contents in an urban soil

Papa¹,

Bartoli²,

Pellegrino³

et al. 2009

Environ Monit Assess

Self Cite

110

View full text Add to dashboard Cite

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“…Other factors that can stimulate microbial activity such as soil enzyme accumulation in previous seasons and diff erences in plant activity and the temperature are the most probable explanations. Th is is the fi rst time that soil urease and β-glucosidase activities have been measured throughout the year in a Mediterranean forest, but soil protease activities had already been studied throughout the year in a Mediterranean forest by Papa et al (2002). Th e results observed in our control plots in the diff erent seasons were similar to those reported by Papa et al (2002).…”

Section: Soil Enzyme Activity: Drought Seasonality and Soil Depthsupporting

confidence: 77%

Soil Enzyme Activity in a Mediterranean Forest after Six Years of Drought

Sardans

Peñuelas

2010

Soil Science Soc of Amer J

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A 6-yr experiment in drought manipulation was conducted in a Quercus ilex L. Mediterranean forest to simulate the drought conditions projected for the coming decades. We investigated the eff ects of those drought conditions on soil urease, protease, and β-glucosidase activities and the changes in C and N stocks in soil, leaves, and leaf litter. Elimination of runoff and rainfall resulted in lower soil water content than in control soils in autumn, winter, and spring (27, 61, and 53%, respectively). In soils subjected to runoff plus partial rainfall elimination, urease activities were reduced by 25% in autumn, winter, and spring; soil protease activities by 33% in winter and spring; and β-glucosidase by 25 to 30% in summer and spring. Drought reduced the C/N ratio of the leaf litter of the dominant species, Q. ilex, by 11%, indicating a decrease in N remobilization before leaf fall. We therefore did not observe an increase in the C/N concentration ratio in litter and soil as we had expected. Drought decreased N availability in spring, the growing season, by reducing soil NO 3 − concentration. Th e reduction in enzyme activities in the droughtaff ected soils was mainly due to the prolonged decrease in water availability and, to a lesser extent, to current soil water availability, mainly in summer, and to changes in the nutritional quality of the enzyme substrate. Th e observed drop in soil enzyme activity can contribute to a decrease in the amount of N liberated and consequently to a decline in the plant N capture, which was observed in some community species such as Arbutus unedo L.

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“…On its steep flanks, the soil is depthless and lava rocks frequently appear on the surface, although at lower elevations the soil of the anthropogenic terraces is about 2 m deep [33]. This substrate corresponds pedologically to a sandy, gravel-rich andosol derived from unconsolidated pyroclastic deposits [34,35].…”

Section: Study Area Climate and Wildfires Of 2017mentioning

confidence: 99%

Detecting Burn Severity across Mediterranean Forest Types by Coupling Medium-Spatial Resolution Satellite Imagery and Field Data

et al. 2020

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In Mediterranean countries, in the year 2017, extensive surfaces of forests were damaged by wildfires. In the Vesuvius National Park, multiple summer wildfires burned 88% of the Mediterranean forest. This unprecedented event in an environmentally vulnerable area suggests conducting spatial assessment of the mixed-severity fire effects for identifying priority areas and support decision-making in post-fire restoration. The main objective of this study was to compare the ability of the delta Normalized Burn Ratio (dNBR) spectral index obtained from Landsat-8 and Sentinel-2A satellites in retrieving burn severity levels. Burn severity levels experienced by the Mediterranean forest communities were defined by using two quali-quantitative field-based composite burn indices (FBIs), namely the Composite Burn Index (CBI), its geometrically modified version CBI (GeoCBI), and the dNBR derived from the two medium-resolution multispectral remote sensors. The accuracy of the burn severity map produced by using the dNBR thresholds developed by Key and Benson (2006) was first evaluated. We found very low agreement (0.15 < K < 0.21) between the burn severity class obtained from field-based indices (CBI and GeoCBI) and satellite-derived metrics (dNBR) from both Landsat-8 and Sentinel-2A. Therefore, the most appropriate dNBR thresholds were rebuilt by analyzing the relationships between two field-based (CBI and GeoCBI) and dNBR from Landsat-8 and Sentinel-2A. By regressing alternatively FBIs and dNBRs, a slightly stronger relationship between GeoCBI and dNBR metrics obtained from the Sentinel-2A remote sensor (R2 = 0.69) was found. The regressed dNBR thresholds showed moderately high classification accuracy (K = 0.77, OA = 83%) for Sentinel-2A, suggesting the appropriateness of dNBR-Sentinel 2A in assessing mixed-severity Mediterranean wildfires. Our results suggest that there is no single set of dNBR thresholds that are appropriate for all burnt biomes, especially for the low levels of burn severity, as biotic factors could affect satellite observations.

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Soil microbial activity in three evergreen oak (Quercus ilex) woods in a mediterranean area

Cited by 9 publications

References 18 publications

Microbial activities and trace element contents in an urban soil

Microbial activities and trace element contents in an urban soil

Soil Enzyme Activity in a Mediterranean Forest after Six Years of Drought

Detecting Burn Severity across Mediterranean Forest Types by Coupling Medium-Spatial Resolution Satellite Imagery and Field Data

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