Search results for "Diversity."
showing 10 items of 3811 documents
Revision of Recent and fossil Mixtacandona Klie 1938 (Ostracoda, Candonidae) from Italy, with description of a new species
2017
Although studies on ostracods dwelling in inland subterranean habitats of Italy have increased in the last decades, highlighting a considerable taxonomic diversity, available information is still far from sufficient to understand phylogenetic and biogeographic relationships. Mixtacandona Klie 1938 is one of the most common and diverse genera of ostracods in subterranean waters. Of the 20 living recognized species in the genus, all stygobiontic and restricted to the Palearctic Region, four are known for the Italian peninsula and Sardinia, one of which exclusively as fossil. Several other Recent and fossil taxa attributable to Mixtacandona, but identified at supraspecific level, have been rep…
Energy and speleogenesis: Key determinants of terrestrial species richness in caves
2017
Abstract The aim of this study was to unravel the relative role played by speleogenesis (i.e., the process in which a cave is formed), landscape‐scale variables, and geophysical factors in the determination of species richness in caves. Biological inventories from 21 caves located in the southeastern Iberian Peninsula along with partial least square (PLS) regression analysis were used to assess the relative importance of the different explanatory variables. The caves were grouped according to the similarity in their species composition; the effect that spatial distance could have on similarity was also studied using correlation between matrices. The energy and speleogenesis of caves account…
Recurrent domestication by Lepidoptera of genes from their parasites mediated by Bracoviruses
2015
Bracoviruses are symbiotic viruses associated with tens of thousands of species of parasitic wasps that develop within the body of lepidopteran hosts and that collectively parasitize caterpillars of virtually every lepidopteran species. Viral particles are produced in the wasp ovaries and injected into host larvae with the wasp eggs. Once in the host body, the viral DNA circles enclosed in the particles integrate into lepidopteran host cell DNA. Here we show that bracovirus DNA sequences have been inserted repeatedly into lepidopteran genomes, indicating this viral DNA can also enter germline cells. The original mode of Horizontal Gene Transfer (HGT) unveiled here is based on the integrativ…
Innovative and Applied Research in Biology: Proceedings, Vol. 3/2021
2021
The collection contains SCIENTIFIC articles on the topics of the LU 79 conference reports. The main focus is on innovative and applied research in biology and interdisciplinary fields.
Subtitling Language Diversity in Spanish Immigration Films
2014
Depuis la fin des années 1980, le cinéma espagnol a été enrichi d’un nombre croissant de films mettant en scène des personnages dans un cadre multiculturel, ce qui témoigne des changements démographiques que la société espagnole a subis au cours des dernières décennies. D’un point de vue traductionnel, ces films ont attiré l’attention des chercheurs, car ils mettent en scène des personnages immigrants qui utilisent non seulement la langue (ou les langues) de leur société d’accueil, mais aussi leur langue maternelle. Le présent article fait état des résultats de la deuxième phase d’une étude portant sur la diversité linguistique se manifestant dans des films espagnols dont le rôle principal …
Eri-ikäisyys ja ikäjohtaminen - Diskursiivinen tutkimus
2005
The purpose of this paper is to examine different age groups and age management in organizations. Age management is obviously an important issue in business organizations and in society as a whole, as it is seen as one solution to the problem of an aging workforce. Age management is defined in this paper based on the theory of diversity management, which regards age as one aspect of diversity. In this paper I explore what kinds of meanings people in the case organizations attach to age and how they define age management in organizations. My research method is discourse analysis, in which the focus is on speech. The main outcome of the study is that people construct “the old” and “the young”…
The role of maternal effects in host-parasite interactions: examination of the development of the immune defense in a colonial seabird, the black-leg…
2004
One of the main aims of evolutionary biology is to understand the mechanisms responsible for the phenotypic variation on which natural selection can act. Maternal effects occur when a mother's phenotype or her environment influence her offspring's phenotype. Despite the importance of such effects for the ecology of host-parasite interactions, their role has been relatively neglected to date. In this thesis, we examined how mothers influence the immune defense of their young in an environment that varies in space and time. This work has primarily focused on a colonial seabird, the black-legged kittiwake (Rissa tridactyla). Using this model, we have first shown that specific maternal antibodi…
Il Dialogo Possibile tra Educazione e Neuroscienze. Un'indagine sulle Prassi Neuroeducative degli Insegnanti
2022
L’orizzonte neuroscientifico corrobora le Scienze dell’Educazione compor-tando un reale ripensamento dei processi di insegnamento e apprendimento in favore di percorsi educativi di qualità. Sondando il carattere dialogico della Neuroeducazione si riportano alcune evidenze neuroscientifiche che affermano l’unicità di ogni cervello; si analizzano le ricadute neuropedagogiche per poi volgere lo sguardo ad un’indagine svolta con un gruppo di 1428 insegnanti della regione Sicilia per analizzare le loro prassi educativo-didattiche fondate nell’orizzonte neuroeducativo. Il processo di analisi ha evidenziato alcuni dati significativi che lasciano intendere una necessaria opera di formazione in fa-v…
Aquatic Macrophytes Occurrence in Mediterranean Farm Ponds: Preliminary Investigations in North-Western Sicily (Italy)
2021
Mediterranean wetlands are severely affected by habitat degradation and related loss of biodiversity. In this scenario, the wide number of artificial farm ponds can play a significant role in the biodiversity conservation of aquatic flora. In the present contribution we show the preliminary results of a study on Mediterranean farm ponds of north-western Sicily (Italy), aimed to investigating the environmental factors linked to the occurrence of submerged macrophytes (vascular plants and charophytes). We studied the aquatic flora of 30 ponds and determined the chemical and isotopic composition of their water bodies on a subset of the most representative 10 sites. Results show that (1) farm p…
Dangerous relationships : biases in freshwater bioassessment based on observed to expected ratios
2018
Copyright by the Ecological Society of America The ecological assessment of freshwaters is currently primarily based on biological communities and the reference condition approach (RCA). In the RCA, the communities in streams and lakes disturbed by humans are compared with communities in reference conditions with no or minimal anthropogenic influence. The currently favored rationale is using selected community metrics for which the expected values (E) for each site are typically estimated from environmental variables using a predictive model based on the reference data. The proportional differences between the observed values (O) and E are then derived, and the decision rules for status ass…