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首页> 外文期刊>GSA Today >Speciation collapse and invasive species dynamics during the Late Devonian 'Mass Extinction'
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Speciation collapse and invasive species dynamics during the Late Devonian 'Mass Extinction'

机译：泥盆纪晚期“大灭绝”期间物种的崩溃和入侵物种的动力学

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The Late Devonian (Frasnian-Famennian) interval includes one of the most dramatic intervals of biotic turnover in the Phanerozoic. Statistical evaluation of diversity change reveals that the primary cause of biodiversity decline was reduced speciation during the crisis interval, not elevated extinction rates. Although various hypotheses have been proposed to explain extinction inerease during the Late Devonian, potential causes for reduced speciation have previously been largely unaddressed. Recent analyses focusing on biogeographic and phylogenetic patterns of species in shallow marine ecosystems of Laurentia indicate that a dramatic inerease in interbasinal species invasions, facilitated by transgressive pulses, fundamentally affected biodiversity by enabling range expansion of ecological generalists and eliminating vicariance, the primary pathway by which new species typically form. Modern species invasions may result in similar speciation loss, exacerbating the current biodiversity crisis.
机译：泥盆纪晚期（Frasnian-Famennian）间隔是古生代最重要的生物更新间隔之一。对多样性变化的统计评估表明，生物多样性下降的主要原因是在危机间隔期间物种形成减少，而不是灭绝速率升高。尽管有人提出了各种假说来解释泥盆纪晚期的灭绝事件，但先前人们尚未广泛讨论物种形成减少的潜在原因。最近对劳伦西亚浅海生态系统中物种的生物地理和系统发育模式的分析表明，在海侵脉冲的推动下，基层间物种入侵的急剧加剧，通过使生态通才的范围扩大并消除了变异，从根本上影响了生物多样性。通常会形成新物种。现代物种的入侵可能导致类似的物种丧失，加剧了当前的生物多样性危机。

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