来自巴西博尼托/马萨诸塞州阿比斯莫安胡马斯市的Myrmecophaga tridactyla (Linnaeus, 1758)亚化石:形态学、同位素生境(δ13C、δ18O)、放射性碳年代测定、生物地理学以及人类对巴西物种保护的影响

IF 1.9 3区 地球科学 Q3 GEOGRAPHY, PHYSICAL
Flavia Miranda, Leonardo Cotts, Edmundo P. Dineli Da Costa Júnior, Maíra Prestes Margarido, Alexander Cherkinsky, Mário André Trindade Dantas
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引用次数: 0

摘要

三趾食蚁兽(Myrmecophaga tridactyla Linnaeus, 1758)是现存最大的食蚁兽,分布于中美洲南部和南美洲北部的大多数生物群落中。在本文中,我们分析了在 Abismo Anhumas 洞穴(巴西南马托格罗索州 Bonito)中发现的三只三趾食蚁兽部分骨骼的颅骨和颅后部分。采集到的骨骼包括头骨(LEG 2598)、左肱骨(LEG 2601)、无柄趾骨(LEG 2602)和腰椎骨(LEG 2599; LEG 2600)。放射性碳年代测定和同位素分析表明,这些动物生活在公元前 360 至 560 卡之间,栖息在与塞拉多(Cerrado)季节性干旱森林相关的树栖到开阔的热带稀树草原中。放射性碳年代氧同位素可能与石笋中发现的年代氧同位素一致,这表明该地区在公元前 442-364 年之间处于潮湿时期。最后,我们建立了古物种分布模型,从而生成了一张共识地图,显示了该物种在 21 至 6 ka 期间的历史稳定区域。目前,该地区超过 50%的区域已被人类活动破坏。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Myrmecophaga tridactyla (Linnaeus, 1758) subfossils from Abismo Anhumas, Bonito/MS, Brazil: Morphology, isotopic habitat (δ13C, δ18O), radiocarbon dating, biogeography and human impact on the species conservation in Brazil

Myrmecophaga tridactyla Linnaeus, 1758 is the largest extant anteater, being distributed in most biomes from southern Central America and northern South America. Herein, we analyzed cranial and postcranial elements of three partial skeletons of M. tridactyla found submerged in Abismo Anhumas cave (Bonito, Mato Grosso do Sul, Brazil). The bones collected were the skull (LEG 2598), left humerus (LEG 2601), ungueal phalanx (LEG 2602), and lumbar vertebrae (LEG 2599; LEG 2600). Radiocarbon dating and isotope analyses indicate that these animals lived between 360 and 560 cal a BP in an arboreal to open savanna habitat associated with the Cerrado, a Seasonal Dry Forest. Radiocarbon-dated oxygen isotopes are possibly in agreement with dated oxygen isotopes found in stalagmites, suggesting a wet period between 442–364 cal a BP in the region. Finally, we created paleo-species distribution models, which allowed the generation of a consensus map showing a historically stable area between 21 and 6 ka for this species. Currently, more than 50% of this area has been destroyed by human activity.

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来源期刊
Journal of Quaternary Science
Journal of Quaternary Science 地学-地球科学综合
CiteScore
4.70
自引率
8.70%
发文量
82
审稿时长
6-12 weeks
期刊介绍: The Journal of Quaternary Science publishes original papers on any field of Quaternary research, and aims to promote a wider appreciation and deeper understanding of the earth''s history during the last 2.58 million years. Papers from a wide range of disciplines appear in JQS including, for example, Archaeology, Botany, Climatology, Geochemistry, Geochronology, Geology, Geomorphology, Geophysics, Glaciology, Limnology, Oceanography, Palaeoceanography, Palaeoclimatology, Palaeoecology, Palaeontology, Soil Science and Zoology. The journal particularly welcomes papers reporting the results of interdisciplinary or multidisciplinary research which are of wide international interest to Quaternary scientists. Short communications and correspondence relating to views and information contained in JQS may also be considered for publication.
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