1,721,053 research outputs found
CHRONICLES OF AN AGE-OLD INVADER: GENETIC AND DEMOGRAPHIC PARAMETERS OF PAST AND PRESENT CRESTED PORCUPINE (HYSTRIX CRISTATA) EUROPEAN POPULATIONS
No full textApproximate Bayesian Computation helps investigating the long-term dynamics of the crested porcupine (Hystrix cristata Linnaeus, 1758) successful biological invasion
No full textUnveiling an ancient biological invasion: molecular analysis of an old European alien, the crested porcupine (<it>Hystrix cristata</it>)
Full text linkAbstract Background Biological invasions can be considered one of the main threats to biodiversity, and the recognition of common ecological and evolutionary features among invaders can help developing a predictive framework to control further invasions. In particular, the analysis of successful invasive species and of their autochthonous source populations by means of genetic, phylogeographic and demographic tools can provide novel insights into the study of biological invasion patterns. Today, long-term dynamics of biological invasions are still poorly understood and need further investigations. Moreover, distribution and molecular data on native populations could contribute to the recognition of common evolutionary features of successful aliens. Results We analyzed 2,195 mitochondrial base pairs, including Cytochrome b, Control Region and rRNA 12S, in 161 Italian and 27 African specimens and assessed the ancient invasive origin of Italian crested porcupine (Hystrix cristata) populations from Tunisia. Molecular coalescent-based Bayesian analyses proposed the Roman Age as a putative timeframe of introduction and suggested a retention of genetic diversity during the early phases of colonization. The characterization of the native African genetic background revealed the existence of two differentiated clades: a Mediterranean group and a Sub-Saharan one. Both standard population genetic and advanced molecular demography tools (Bayesian Skyline Plot) did not evidence a clear genetic signature of the expected increase in population size after introduction. Along with the genetic diversity retention during the bottlenecked steps of introduction, this finding could be better described by hypothesizing a multi-invasion event. Conclusion Evidences of the ancient anthropogenic invasive origin of the Italian Hystrix cristata populations were clearly shown and the native African genetic background was preliminary described. A more complex pattern than a simple demographic exponential growth from a single propagule seems to have characterized this long-term invasion.</p
Development of primers to amplify mitochondrial DNA control region of Old World porcupines (subgenus Hystrix)
No full textMarco Cevoli, Sergio Alasia, „Guida completa a OmegaT: tecniche, trucchi e consigli per traduttori e project manager”, Narcissus Self-publishing, e-book [recenzja]
Full text linkRecenzja książki: Marco Cevoli, Sergio Alasia, "Guida completa a OmegaT: tecniche, trucchi e consigli per
traduttori e project manager", Narcissus Self-publishing, e-boo
Comparative analysis of species diversity of Isopoda Oniscidea and Collembola communities in burnt and unburnt habitats in Central Italy
No full textEffects of canopy and superficial wild-fire on centiped (Chilopoda) communities in Mediterranean forest ecosystems of Central italy
No full textSpecies composition and structure of centipede (Chilopoda) communities were
studied in a sub-urban burnt forest on theMediterranean coast near Roma, Italy.
The study was carried out in two sites affected by canopy fire (complete vegetation
destruction), one affected by surface fire (persistence of tree canopy), and
three unburnt sites. Monthly, quantitative/qualitative samplings were performed
in each site from April 2001 to April 2002 by pitfall trapping and one hour active
search.Analyses of species composition, dominance structure, diversity and colonization
progress were performed. Centipede communities of the sites affected
by canopy fire were simply structured, poor in both species richness and diversity;
conversely, species composition, structure and diversity of the community
affected by surface fire were scarcely modified
Short-term effects of canopy and surface fire on centipede (Chilopoda) communities in a semi natural Mediterranean forest
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