A new late Pleistocene subfossil site (Tsaramody, Sambaina basin, central Madagascar) with implications for the chronology of habitat and megafaunal community change on Madagascar's Central Highlands

A new late Pleistocene subfossil site (Tsaramody, Sambaina basin, central Madagascar) with implications for the chronology of habitat and megafaunal community change on Madagascar's Central Highlands
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一个新的晚更新世亚化石遗址(马达加斯加中部桑巴伊纳盆地的察拉莫迪)对马达加斯加中部高地栖息地和巨型动物群落变化的年代学具有影响

DOI:
10.1002/jqs.3096
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发表时间:
2019
影响因子:
2.3
通讯作者:
Irwin, Mi
Irwin, Mi
中科院分区:
地球科学3区
文献类型:
--
作者:
Samonds, Karen E.;Crowley, Brooke E.;Rasolofomanana, Tojoarilala Rinasoa;Andriambelomanana, Miora Christelle;Andrianavalona, Harimalala Tsiory;Ramihangihajason, Tolotra Niaina;Rakotozandry, Ravoniaina;Nomenjanahary, Zafindratsaravelo Bototsemily;Irwin, Mi

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马达加斯加是一个复杂的“生物多样性热点”,生物群迅速减少。晚第四纪亚化石记录包括许多灭绝的物种,其损失归因于自然气候变化和人类的影响。调查这些事件的年表是具有挑战性的,因为很少有地方记录前全新世社区没有受到人类的影响。洞穴里有着已经灭绝的体型巨大的狐猴,这些洞穴是马达加斯加最丰富的亚化石遗址之一,但只能提供一个有限的窗口来了解该岛的过去。开阔的高地可能有较少的灵长类动物,但可能更好地记录其他巨型动物,并允许分析中央高地作为避难所和人类到来前后脊椎动物扩散走廊的作用。在这里,我们提出了一个新的亚化石遗址,Tsaramody(Sambaina盆地,马达加斯加中部),一个高海拔湿地地区,保存了多样的晚冰期和冰后期脊椎动物群落。Tsaramody证明了高原植物群在从冰川到冰后期条件的过渡期间的波动,以及人类到达之前高原脊椎动物群落的组成。我们将其生物群与其他地点的生物群进行比较,开始记录马达加斯加一些开放生态系统中巨型动物的减少和消失-湿地主要由淡水河谷和鳄鱼。© 2019约翰威利父子有限公司
Madagascar is a complex ‘biodiversity hotspot’ with a rapidly dwindling biota. The Late Quaternary subfossil record includes many extinct species whose loss is attributed to natural climate change and human impacts. Investigation of the chronology of these events is challenging because few localities document pre‐Holocene communities not impacted by humans. Caves with extinct lemurs of large body size comprise some of Madagascar's richest subfossil sites, but provide only a limited window into the island's past. Open highland sites may have fewer primates, but may better document other megafauna, and allow the analysis of the role of the Central Highlands as refugia and as corridors for the dispersal of vertebrates before and after human arrival. Here we present a new subfossil site, Tsaramody (Sambaina basin, Central Madagascar), a high‐altitude wetland area that preserves a diverse late glacial and postglacial vertebrate community. Tsaramody bears testimony to fluctuations in the highland flora during the transition from glacial to postglacial conditions, and the composition of a highland vertebrate community before humans arrived. We compare its biota to those of other sites to begin to document the decline and disappearance of megafauna from some of Madagascar's open ecosystems – wetlands dominated by hippopotamuses and crocodylians. © 2019 John Wiley & Sons, Ltd.
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