Search results for "Community"
showing 10 items of 2132 documents
Global data on earthworm abundance, biomass, diversity and corresponding environmental properties
2021
Earthworms are an important soil taxon as ecosystem engineers, providing a variety of crucial ecosystem functions and services. Little is known about their diversity and distribution at large spatial scales, despite the availability of considerable amounts of local-scale data. Earthworm diversity data, obtained from the primary literature or provided directly by authors, were collated with information on site locations, including coordinates, habitat cover, and soil properties. Datasets were required, at a minimum, to include abundance or biomass of earthworms at a site. Where possible, site-level species lists were included, as well as the abundance and biomass of individual species and ec…
BioTIME: A database of biodiversity time series for the Anthropocene
2018
Abstract Motivation The BioTIME database contains raw data on species identities and abundances in ecological assemblages through time. These data enable users to calculate temporal trends in biodiversity within and amongst assemblages using a broad range of metrics. BioTIME is being developed as a community-led open-source database of biodiversity time series. Our goal is to accelerate and facilitate quantitative analysis of temporal patterns of biodiversity in the Anthropocene. Main types of variables included The database contains 8,777,413 species abundance records, from assemblages consistently sampled for a minimum of 2 years, which need not necessarily be consecutive. In addition, th…
Italian Sign Language and Spoken Italian in contact: an analysis of interactions between Deaf Parents and Hearing Children
1999
This study explores the outcome of the contact between sign language and spoken italian
Una prospettiva storica e pedagogica sulle Lingue dei Segni: riflessioni psicolinguistiche
2021
Da oltre 50 anni, da quando W. Stokoe negli anni '60 individuò in USA i parametri di articolazione delle lingue dei Segni (cfr. Stokoe, 1981), si assiste ad un sempre maggiore interesse nei confronti delle lingue visivo-gestuali delle comunità di sordi, grazie anche agli sviluppi nel campo della psicolinguistica, delle neuroscienze, e delle nuove tecnologie che consentono indagini sul linguaggio e sul funzionamento cerebrale impensabili sino a qualche tempo fa. Può forse sorprendere che, in una prospettiva storica, all'interno del dibattito linguistico-filosofico si può riscontrare un analogo interesse per i sordi e le loro forme di comunicazione soltanto nella seconda metà del sec. XVIII e…
Interpretación social y accesibilidad. Una propuesta de conexión disciplinar
2020
El objetivo de este estudio es ofrecer argumentos para entender la actividad propia de la interpretación social como parte del dominio genérico de la accesibilidad. Al hacerlo no ampliamos en realidad el concepto de accesibilidad, sino que reforzamos aquello que justifica el uso de este término, para diferenciar una parcela de actividad dentro de la práctica general de la traducción y la interpretación. Con el tema de la accesibilidad sucede que se ha manejado una etiqueta sin una delimitación conceptual previa de lo que se pretende designar por medio de ella. En este estudio nos ocupamos brevemente de esta tarea de aproximación conceptual, con el objetivo de incluir bajo el abanico de las …
Soil environmental conditions rather than denitrifier abundance and diversity drive potential denitrification after changes in land uses
2010
Land-use practices aiming at increasing agro-ecosystem sustainability, e.g. no-till systems and use of temporary grasslands, have been developed in cropping areas, but their environmental benefits could be counterbalanced by increased N2O emissions produced, in particular during denitrification. Modelling denitrification in this context is thus of major importance. However, to what extent can changes in denitrification be predicted by representing the denitrifying community as a black box, i.e. without an adequate representation of the biological characteristics (abundance and composition) of this community, remains unclear. We analysed the effect of changes in land uses on denitrifiers for…
Characterization of denitrification gene clusters of soil bacteria via a metagenomic approach
2009
International audience; Denitrification is a microbial respiratory process contributing to the emission of greenhouse gas. The study of denitrifying bacteria, like that of others, is hindered by characteristics that can prevent up to 99% of soil bacteria from being cultivated in vitro. New approaches based on the direct extraction of DNA from the natural environment and PCR amplifications can overcome limitations due to bacterial unculturability, but until now their application to denitrification genes has led only to the recovery of partial sequences for some of these genes.Our goals in this study were to apply a metagenomic approach characterized by cloning of DNA extracted from soil and …
Intestinal helminth communities of the long-finned pilot whale (Globicephala melas) off the Faroe Islands.
1993
SUMMARYThe intestines of 170 long-finned pilot whales, Globicephala melas, caught off the Faroe Islands (N.E. Atlantic) were examined for helminth parasites. Eight species were detected but only 4 occurred in at least 10% of the sample. No core or recurrent group of species were identified and no correlations between abundances of species were significant. Diversity values were far below those reported for other endotherms. Colonization by helminths was random, whales not being readily colonized. These features point to largely unpredictable, isolationist infracommunities, there being little potential for inter-specific interactions. Older hosts tended to harbour more diverse infracommuniti…
Effect of different protective agents on enamel erosion: An in vitro investigation
2019
Background The purpose of this in vitrostudy was to compare the effect of different protective agents on enamel erosion by measuring mean percentage weight loss. Material and Methods Extracted teeth were sectioned into uniform slabs and enamel specimens were randomly distributed to different groups. Initial weight of all enamel specimens was registered. The protective agents used in this study were Tooth Mousse, MI Paste Plus, Remin Pro and Remin Pro Forte. A control group was treated just with tap water. All the specimens were immersed in Coca-Cola for a total of 8 min at room temperature, dried and weighed. Enamel dissolution caused by acidic soft drink was analyzed: specimens were weighe…
Comparative efficacy of aloe vera mouthwash and chlorhexidine on periodontal health: A randomized controlled trial
2016
Background: With introduction of many herbal medicines, dentistry has recently evidenced shift of approach for treating many inflammatory oral diseases by using such modalities. Aloe vera is one such product exhibiting multiple benefits and has gained considerable importance in clinical research recently. Aims: To compare the efficacy of Aloevera and Chlorhexidine mouthwash on Periodontal Health. Material and Methods: Thirty days randomized controlled trial was conducted among 390 dental students. The students were randomized into two intervention groups namely Aloe Vera (AV) chlorhexidine group (CHX) and one control (placebo) group. Plaque index and gingival index was recorded for each par…