【2h】

PNAS Plus: Vertebrate community on an ice-age Caribbean island

机译:PNAS Plus:在一个冰河世纪的加勒比海岛屿上的脊椎动物社区

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摘要

We report 95 vertebrate taxa (13 fishes, 11 reptiles, 63 birds, 8 mammals) from late Pleistocene bone deposits in Sawmill Sink, Abaco, The Bahamas. The >5,000 fossils were recovered by scuba divers on ledges at depths of 27–35 m below sea level. Of the 95 species, 39 (41%) no longer occur on Abaco (4 reptiles, 31 birds, 4 mammals). We estimate that 17 of the 39 losses (all of them birds) are linked to changes during the Pleistocene–Holocene Transition (PHT) (∼15–9 ka) in climate (becoming more warm and moist), habitat (expansion of broadleaf forest at the expense of pine woodland), sea level (rising from −80 m to nearly modern levels), and island area (receding from ∼17,000 km2 to 1,214 km2). The remaining 22 losses likely are related to the presence of humans on Abaco for the past 1,000 y. Thus, the late Holocene arrival of people probably depleted more populations than the dramatic physical and biological changes associated with the PHT.
机译:我们从晚更新世骨骼沉积物中报告了95个脊椎动物类群(13条鱼类,11种爬行动物,63种鸟类,8种哺乳动物),它们位于巴哈马州的Sawmill Sink,Sawmill Sink。水肺潜水员在低于海平面27-35 m的壁架上回收了超过5,000种化石。在这95种中,有39种(41%)不再出现​​在Abaco上(4种爬行动物,31只鸟,4种哺乳动物)。我们估计这39种损失(全部是鸟类)中有17种与气候(变得更加温暖潮湿),生境(阔叶林的扩张)的更新世-全新世过渡(PHT)(约15-9 ka)期间的变化有关。 (以松树林为代价),海平面(从-80 m上升到近现代水平)和岛屿面积(从〜17,000 km 2 减少到1,214 km 2 )。剩下的22处损失可能与过去1000年来在Abaco上有人的存在有关。因此,晚全新世的到来可能比与PHT相关的急剧的生理和生物学变化消耗了更多的人口。

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