Speciation collapse and invasive species dynamics during the Late Devonian “Mass Extinction”
[摘要] The Late Devonian (Frasnian-Famennian) interval includes one ofthe most dramatic intervals of biotic turnover in the Phanerozoic. Statistical evaluationof diversity change reveals that the primary cause of biodiversity decline was reducedspeciation during the crisis interval, not elevated extinction rates. Although varioushypotheses have been proposed to explain extinction increase during the Late Devonian,potential causes for reduced speciation have previously been largely unaddressed.Recent analyses focusing on biogeographic and phylogenetic patterns of species inshallow marine ecosystems of Laurentia indicate that a dramatic increase in interbasinalspecies invasions, facilitated by transgressive pulses, fundamentally affected biodiversityby enabling range expansion of ecological generalists and eliminating vicariance,the primary pathway by which new species typically form. Modern species invasionsmay result in similar speciation loss, exacerbating the current biodiversity crisis.
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[效力级别] [学科分类] 地质学
[关键词] Fire safety;fatal fires;smoke alarms [时效性]
