The Guineo‐Congolian region in Africa constitutes the second largest area of tropical rainforest (TRF) in the world. It covered an estimated 15–22 million km² during the late Miocene (55–11 Ma) and it has experienced since a declining trend, currently reaching 3.4 million km², associated with increasing aridification and the replacement of TRF by savanna habitats. Here, we examine whether rainforest area contraction led to a decrease in net diversification rates linked to increasing extinction, or if it is associated with increasing opportunities for allopatric or ecological speciation during periods of forest fragmentation.

中文翻译：

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几内亚-刚果地区雨林面积的减少对柏林枝（Leguminosae）的多样化速度和生境转变的影响

非洲的几内亚-刚果地区是世界第二大热带雨林地区。它在中新世晚期（55-11 Ma）估计覆盖了15–22百万km ²，并且自下降趋势以来一直经历着，目前达到340万km ²，与干旱化和热带草原栖息地替代TRF有关。在这里，我们研究了雨林面积的缩小是否导致与灭绝加剧有关的净多样化率的下降，或者是否与森林破碎化时期异地或生态物种形成的机会增加有关。