Pollen evidence of the palaeoenvironments of Lufengpithecus lufengensis in the Zhaotong Basin, southeastern margin of the Tibetan Plateau
Pollen evidence of the palaeoenvironments of Lufengpithecus lufengensis in the Zhaotong Basin, southeastern margin of the Tibetan Plateau
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DOI：
10.1016/j.palaeo.2015.06.007
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
Lin Chang;Zhengtang Guo;C. Deng;Haibin Wu;X. Ji;Yan Zhao;Chunxia Zhang;J. Ge;Bailing Wu
中科院分区：
文献类型：
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作者：
Lin Chang;Zhengtang Guo;C. Deng;Haibin Wu;X. Ji;Yan Zhao;Chunxia Zhang;J. Ge;Bailing Wu
类人猿的进化过程与全球和/或区域环境变化密切相关，因此古环境重建是理解环境变化如何塑造其进化的基础。在这里，我们提出了花粉数据从16米厚的水塘坝（STB）剖面，云南省，中国西南部，轴承的人属禄丰pithecus禄丰晚期中新世的遗骸;并使用主成分分析重建的古植被和古气候的关键时期，人科动物生活。我们的研究结果表明，在STB类人猿出现之前（A区），植被以亚热带万年青阔叶类群为主，少数温带落叶类群（例如，栎属、栗属/锥属、赤杨属）。水生植物在~ 12 m深度开始发育是一个突出的特征，表明气候温暖潮湿。在人科动物生活的时期（B带），万年青阔叶林和常绿栎类占优势，禾本科等禾本科植物开始扩张，同时针叶树减少，表明气候温暖。在A-2亚带和B带中大量存在水生花粉类群，表明该地区为湖泊或沼泽环境。相反，在C区，植被变为针叶林，表明较冷和干燥的条件。这些结果提供了人科动物生活时植被条件的实质性证据，表明与今天相比，植被的多样性和温暖潮湿的气候将有利于其生存。
Evolutionary processes in hominoid primates were closely related to global and/or regional environmental changes, and therefore palaeoenvironmental reconstruction is fundamental for understanding how environmental changes shaped their evolution. Here, we present pollen data from the 16-m-thick Shuitangba (STB) section, Yunnan Province, southwestern China, bearing remains of the hominoidLufengpithecus lufengensisof the terminal Miocene; and use principal component analysis to reconstruct the palaeovegetation and palaeoclimate during the key period when the hominoid lived. Our results show that before the STB hominoid appeared (Zone A), the vegetation was dominated by subtropical evergreen broad-leaved taxa with a few temperate deciduous taxa (e.g.,Quercus,Castanea/Castanopsis,Alnus). The development of aquatic plants commencing at the ~ 12 m depth is a prominent feature, indicating a warm and humid climate. During the time when the hominoid lived (Zone B), evergreen broad-leaved forests with evergreenQuercuswere predominant, while grasses including Poaceae began to expand, and simultaneously conifers decreased, indicating a warm climate. The significant presence of aquatic pollen taxa in subzone A-2 and Zone B suggests the occurrence of lacustrine or swampy environments. In contrast, in Zone C, the vegetation changed to coniferous forest, indicating cooler and drier conditions. These results provide substantive evidence of the vegetation conditions when the hominoid lived, suggesting that the greater diversity of vegetation and the warm humid climate, compared to the present day, would have favoured its survival.