Geodiversitas | |
Biochronology and palaeoenvironmental changes from the Middle Pliocene to the Late Pleistocene in Central Italy | |
Luca Bellucci1  Leonardo Salari1  Edoardo Martiinetto1  Carmelo Petronio1  Luca Pandolfi1  | |
关键词: Biochronology; Italy; Pliocene; Pleistocene; large mammals; Biochronologie; Italie; Pliocène; Pléistocène; grands mammifères; | |
DOI : 10.5252/g2011n3a4 | |
学科分类:生物科学(综合) | |
来源: Museum National d Histoire Naturelle | |
【 摘 要 】
PaleoenvironmentalvariationsthatoccurredinItalyfromtheMiddlePliocenetotheLatePleistocenearedescribed.Thenumberoflargemammalspeciesseemsincreasedmoderately,especiallyfromtheGaleriantotheLateAurelianbiochronologicalunits.Onthecontrary,thepaleobotanicaldatashowadecreaseoftheforestcoverfromtheMiddlePliocenetothelateEarlyPleistoceneandanincreaseoflandsoccupiedbyprairiesandsteppes.Thischangeisalsosupportedbytheappearanceofhypsodonttaxaamongmammals.ThedistributionofmammalfaunasbetweentheAdriaticandTyrrheniansidesofCentralItaly,duringtheMiddleandLatePleistocene,seemsnottobeinfluencedbyclimaticandenvironmentdifferences.WhentheAdriaticdataaremorecomplete,itispossible,infact,toobserveatrendthatisfairlyclosetothatoftheTyrrhenian.ThemajorityofmegaherbivoroustaxahasanAsianorigin,anditcanbehypothesizedthatintheinterglacialphases,theTosco-EmilianApenninesallowedthetaxacomingfromthenortheasttoenterandspreadoutintothemorediversifiedTyrrhenianside,whereasduringtheglacialperiodsthenarrowLiguriancorridorwerefollowed.ThisresearchsupportstheroleoftheItalianPeninsulaasarefugeareaforcontinentalEurope;thisparticularconditionpermitstheItalianmammalfaunastodevelopendemiclineage(suchasElephasantiquusitalicusOsborn,1931,CervuselaphusrianensisLeonardiamp;Petronio,1974,C.e.aretinusAzzaroli,1947,etc.).Atlast,biodiversitysharplydroppedduringthelast30000years,probablyduetotheanthropicactivitiesandthestrongclimaticcoolingofthelastpleniglacial.
【 授权许可】
Unknown
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