Paleobiology of a large mammal community from the late Pleistocene of Sonora, Mexico

Paleobiology of a large mammal community from the late Pleistocene of Sonora, Mexico
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墨西哥索诺拉更新世晚期大型哺乳动物群落的古生物学

DOI:
10.1017/qua.2020.125
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发表时间:
2021
影响因子:
2.3
通讯作者:
Baez, Arturo
Baez, Arturo
中科院分区:
地球科学3区
文献类型:
--
作者:
Short, Rachel A.;Emmert, Laura G.;Famoso, Nicholas A.;Martin, Jeff M.;Mead, Jim I.;Swift, Sandy L.;Baez, Arturo

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圣克莱门特附近的一个古生物沉积物代表了墨西哥索诺拉境内为数不多的北美陆地哺乳动物时代的兰乔布里亚遗址之一。在此期间,草原很常见,气候包括比目前墨西哥北部经历的更凉爽、更干燥的夏季和更潮湿的冬季。在这里,我们展示了过去40,000年来在特拉帕与环境变化相关的哺乳动物群落的重组。化石群落有类似数量的食肉动物和草食动物,而现代群落主要由食肉动物组成。由于大型动物的丧失,平均身体尺寸也减少了97%(从289公斤减少到9公斤)。我们进一步提供了有蹄类和食肉动物的最新回顾,识别出两种不同的马的形态类型,包括E.Scotti和一个较轻的种;以及扁平颈椎动物;Camelophester nus;Canis dirus和Lynx Rufus;以及Palaeolama Miifica,Procyon lotor和Smilodon cf的第一个区域记录。致死链霉菌。这里展示的特拉帕哺乳动物提供了对墨西哥北部从晚更新世到现在发生的动物群群落重组的更全面的了解,表明随着该地区的持续变暖和干燥,生物多样性可能进一步丧失。
A paleontological deposit near San Clemente de Térapa represents one of the very few Rancholabrean North American Land Mammal Age sites within Sonora, Mexico. During that time, grasslands were common, and the climate included cooler and drier summers and wetter winters than currently experienced in northern Mexico. Here, we demonstrate restructuring in the mammalian community associated with environmental change over the past 40,000 years at Térapa. The fossil community has a similar number of carnivores and herbivores whereas the modern community consists mostly of carnivores. There was also a 97% decrease in mean body size (from 289 kg to 9 kg) because of the loss of megafauna. We further provide an updated review of ungulates and carnivores, recognizing two distinct morphotypes of Equus, including E. scotti and a slighter species; as well as Platygonus compressus; Camelops hesternus; Canis dirus; and Lynx rufus; and the first regional records of Palaeolama mirifica, Procyon lotor, and Smilodon cf. S. fatalis. The Térapa mammals presented here provide a more comprehensive understanding of the faunal community restructuring that occurred in northern Mexico from the late Pleistocene to present day, indicating further potential biodiversity loss with continued warming and drying of the region.
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DOI: --
发表时间: 2022
期刊: CABI Compendium
影响因子: --
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