titoli, abstracts, parole chiave >>>
Soil bacterial community response to differences in agricultural management along with seasonal changes in a Mediterranean region

Bevivino, Annamaria and Paganin, Patrizia and Bacci, Giovanni and Florio, Alessandro and Sampedro Pellicer, Maite and Papaleo, Maria Cristiana and Mengoni, Alessio and Ledda, Luigi and Fani, Renato and Benedetti, Anna and Dalmastri, Claudia (2014) Soil bacterial community response to differences in agricultural management along with seasonal changes in a Mediterranean region. PLoS One, Vol. 9 (8), e105515. eISSN 1932-6203. Article.

[img]
Preview
Full text disponibile come PDF Richiede visualizzatore di PDF come GSview, Xpdf o Adobe Acrobat Reader
Available under License Creative Commons Attribution.

1345Kb

DOI: 10.1371/journal.pone.0105515

Abstract

Land-use change is considered likely to be one of main drivers of biodiversity changes in grassland ecosystems. To gain insight into the impact of land use on the underlying soil bacterial communities, we aimed at determining the effects of agricultural management, along with seasonal variations, on soil bacterial community in a Mediterranean ecosystem where different land-use and plant cover types led to the creation of a soil and vegetation gradient. A set of soils subjected to different anthropogenic impact in a typical Mediterranean landscape, dominated by Quercus suber L., was examined in spring and autumn: a natural cork-oak forest, a pasture, a managed meadow, and two vineyards (ploughed and grass covered). Land uses affected the chemical and structural composition of the most stabilised fractions of soil organic matter and reduced soil C stocks and labile organic matter at both sampling season. A significant effect of land uses on bacterial community structure as well as an interaction effect between land uses and season was revealed by the EP index. Cluster analysis of culture-dependent DGGE patterns showed a different seasonal distribution of soil bacterial populations with subgroups associated to different land uses, in agreement with culture-independent T-RFLP results. Soils subjected to low human inputs (cork-oak forest and pasture) showed a more stable bacterial community than those with high human input (vineyards and managed meadow). Phylogenetic analysis revealed the predominance of Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes phyla with differences in class composition across the site, suggesting that the microbial composition changes in response to land uses. Taken altogether, our data suggest that soil bacterial communities were seasonally distinct and exhibited compositional shifts that tracked with changes in land use and soil management. These findings may contribute to future searches for bacterial bio-indicators of soil health and sustainable productivity. X Maite Sampedro Pellicer, Affiliation: ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development) Casaccia Research Center, Technical Unit for Sustainable Development and Innovation of Agro-Industrial System, Rome, Italy X Maria Cristiana Papaleo, Affiliation: Laboratory of Microbial and Molecular Evolution, Department of Biology, University of Florence, Florence, Italy X Alessio Mengoni, Affiliation: Laboratory of Microbial and Molecular Evolution, Department of Biology, University of Florence, Florence, Italy X Luigi Ledda, Affiliation: Dipartimento di Agraria, University of Sassari, Sassari, Italy X Renato Fani, Affiliation: Laboratory of Microbial and Molecular Evolution, Department of Biology, University of Florence, Florence, Italy X Anna Benedetti, Affiliation: Consiglio per la Ricerca e la Sperimentazione in Agricoltura - Research Centre for the Soil-Plant System, Rome, Italy X Claudia Dalmastri

Item Type:Article
ID Code:10170
Status:Published
Refereed:Yes
Uncontrolled Keywords:Soil bacterial communities, Quercus suber, Mediterranean ecosystem
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/02 Agronomia e coltivazioni erbacee
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Agraria
Publisher:Public Library of Science
eISSN:1932-6203
Copyright Holders:© 2014 Bevivino et al.
Deposited On:10 Oct 2014 11:24

I documenti depositati in UnissResearch sono protetti dalle leggi che regolano il diritto d'autore

Repository Staff Only: item control page