Microbial dynamics in Mediterranean Moder humus     

Anna Andreetta  Cristina Macci  Maria Teresa Ceccherini  Guia Cecchini  Graziana Masciandaro  Giacomo Pietramellara  Stefano Carnicelli 《Biology and Fertility of Soils》2012,48(3):259-270

There is a growing interest in the links between humus forms and soil biota, and little is known about these links in Mediterranean ecosystems. Culture-independent techniques, such as DNA extraction followed by DGGE and enzyme activities, allowed us to compare microbial communities in two horizons of a forest soil in different seasonal conditions. Direct in situ lysis was applied for extraction of DNA from soil; intracellular DNA was separated from extracellular and used to represent the composition of microflora. The aims were to describe how biochemical and microbiological parameters correlate with topsoil properties in typical Mediterranean Moder humus. Changes in bacterial and fungal community composition were evident from DGGE profiles. Degrees of similarity and clustering correlation coefficients showed that the seasonal conditions may affect the composition and activity of bacterial and fungal communities in the OH horizon, while in the E horizon the two communities were hardly modified. In the same season, OH and E horizons showed a different composition of bacterial and fungal communities and different enzyme activities, suggesting similar behaviour of eubacteria and fungi relatively to all the variables analysed. Evidently, different organic carbon content in soil horizons influenced microflora composition and microbial activities involved in the P and N cycles.  相似文献   

The extensive mercury contamination in soil and legacy sediments of the Paglia River basin (Tuscany,Italy): interplay between Hg-mining waste discharge along rivers, 1960s economic boom,and ongoing climate change     

Fornasaro  Silvia  Morelli  Guia  Rimondi  Valentina  Fagotti  Cesare  Friani  Rossella  Lattanzi  Pierfranco  Costagliola  Pilario 《Journal of Soils and Sediments》2022,22(2):656-671

Journal of Soils and Sediments - The extensive Hg contamination in soil and sediments occurring along the Paglia River (Central Italy) is the result of the interplay between the geomorphological...  相似文献   

Vermicompost for Tinted Organic Cationic Dyes Retention     

Madson de Godoi Pereira  Mauro Korn  Bruno Barros Santos  Marcia Guia Ramos 《Water, air, and soil pollution》2009,200(1-4):227-235

The use of vermicompost was expanded as natural adsorbent for cationic dyes retention. The adsorption profiles in batch and flow modes for crystal violet and methylene blue on vermicompost material were evaluated. In batch mode, a retention index higher than 97% was obtained for both compounds, while in flow condition, 40 g of dried adsorbent material were enough to remove 100 mg of crystal violet or methylene blue at column flow rates of 5 and 20 mL min^?1. Adsorption isotherms showed adsorptive maximum capacities for vermicompost of 0.78 and 5.47 mg g^?1, respectively, which were compatible with the literature. Due to this good efficiency capacity, incineration steps can be considered as acceptable disposal procedures for enriched vermicompost. From these characteristics, economical and environmental advantages of the proposed material for the evaluated cationic dyes retention were evidenced.  相似文献