Search results for "COMMUNITIES"
showing 10 items of 355 documents
Re-Clustering tool using an Open-Reference method that improves OTU definition
2019
International audience; 1.Environmental microbial communities are now widely studied using metabarcoding approaches, thanks to the democratization of high‐throughput DNA sequencing technologies. The massive number of reads produced with these technologies requires bioinformatic solutions to be treated. A key step in the analysis is to cluster reads into Operational Taxonomic Units (or OTUs) and thus reduce the amount of data for downstream analyses. Due to the important impact of the clustering method on the quantity and quality of OTUs, finding an equilibrium between the reliability and time‐consuming nature of the chosen strategy is a real challenge. The present article proposes a new pos…
Mujeres, trabajo y asociación rural
2019
Incidence and survival of human pathogens in French soils, impact of land use, pedoclimatic and biologic soil factors
2013
Soil contamination by bacterial pathogens can occur through manure, sewage sludge spreading or irrigation using waste water treatment plants effluents. Agricultural soils may act as reservoirs for these pathogens, play a significant role in their dissemination, leading to the potential contamination of food and water resources. Health risk associated with the occurrence of pathogens in environmental matrices has to be thoroughly evaluated. In this context, the objectives of this work were: i) to determine the prevalence of two pathogenic bacterial species (Listeria monocytogenes and Enterococcus faecalis) in a large collection of French soils originated from a systematic soil survey of the …
Cosa può dirci l’antico. Spazi, forme e funzioni dei pellegrinaggi cristiani “minori”
2016
In questa sede si pone attenzione, osservando alcuni pellegrinaggi cristiani definibili come “minori”, ad alcune questioni relative alle relazioni tra ambiente, società e luoghi sacri, alle funzioni rivestite dall’itinerario pellegrinale in rapporto alla diversa composizione delle “comunità di pellegrinaggio” e alle ragioni “religiose” che hanno potuto sostenere la continuità di frequentazione dei luoghi di culto e il reiterarsi di certe pratiche rituali. Nonostante le trasformazioni socio-culturali, il mutare delle aspettative esistenziali dei fedeli, dei sistemi di produzione, dei regimi alimentari, della consistenza demografica, il pellegrinaggio resta, infatti, un istituto religioso dif…
Bank-firm credit network in Japan. An analysis of a bipartite network
2015
We present an analysis of the credit market of Japan. The analysis is performed by investigating the bipartite network of banks and firms which is obtained by setting a link between a bank and a firm when a credit relationship is present in a given time window. In our investigation we focus on a community detection algorithm which is identifying communities composed by both banks and firms. We show that the clusters obtained by directly working on the bipartite network carry information about the networked nature of the Japanese credit market. Our analysis is performed for each calendar year during the time period from 1980 to 2011. Specifically, we obtain communities of banks and networks …
Dynamic of the genetic structure of bacterial and fungal communities at different developmental stages of Medicago truncatula Gaertn. cv. Jemalong li…
2006
International audience; The genetic structure of bacterial and fungal communities was characterized in the rhizosphere of Medicago truncatula Gaertn. cv. Jemalong line J5 at five developmental stages (three vegetative and two reproductive stages), and in three compartments (bulk soil, rhizosphere soil and root tissues). The genetic structure of microbial communities was determined by cultivation-independent methods using directly extracted DNA that was characterized by automated ribosomal intergenic spacer analysis (ARISA). Principal component analyses (PCA) indicate that, for all developmental stages, the genetic structure of microbial communities differed significantly by compartment, wit…
Gated communities nel meridione europeo? Alcune evidenze tra Lisbona e Palermo
2011
Dagli anni '90 le discipline sociologiche e geografiche hanno posto particolare attenzione ai processi di securizzazione, fortificazione e privatizzazione dello spazio urbano. La ricerca di dottorato dalla quale questo articolo è estratto ha l'ambizione di estendere il ragionamento ai territori del meridione europeo – generalmente tralasciati dalla letteratura di riferimento – e di contribuire ad una teorizzazione per una pianificazione capace di affrontare tali questioni. La letteratura esistente ha uno dei suoi fulcri nello studio delle gated communities, condomini fortificati sull'esempio di quelli statunitensi emergenti dagli anni '70: in questo pezzo si analizza la questione delle gate…
Detection of antagonism and polarization on social media through community boundaries
2021
Potential for microbial diuron mineralisation in a small wine-growing watershed: from treated plots to lotic receiver hydrosystem
2009
BACKGROUND: Since biological degradation processes are known to be a major driver of the natural attenuation of pesticide residues in the environment, microbial communities adapted to pesticide biodegradation are likely to play a key environmental role in reducing pesticide exposure in contaminated ecosystems. The aim of this study was to assess the diuron-mineralising potential of microbial communities at a small-scale watershed level, including a diuron-treated vineyard (pollution source), its associated grass buffer strip (as a river protection area against pesticide runoff) and the lotic receiver hydrosystem (sediments and epilithon), by using radiorespirometry. RESULTS: Comparison of r…
Potametum alpini Podbielkowski 1967 w starorzeczach południowo-zachodniej Polski
2018
The paper presents the distribution and habitat conditions of Potametum alpini communities (class Potametea) in oxbow lakes of south-western Poland. A study done in 2000–2015 identified 11 localities of this community in oxbow lakes. The threats to Potametum alpini in south-western Poland include changes in the levels and physicochemistry of the water.