GSTDTAP  > 地球科学
DOI10.1073/pnas.1909284116
Early hominins evolved within non-analog ecosystems
Faith, J. Tyler1,2; Rowan, John3; Du, Andrew4
2019
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2019
卷号116期号:43页码:21478-21483
文章类型Article
语种英语
国家USA
英文摘要

Present-day African ecosystems serve as referential models for conceptualizing the environmental context of early hominin evolution, but the degree to which modern ecosystems are representative of those in the past is unclear. A growing body of evidence from eastern Africa's rich and well-dated late Cenozoic fossil record documents communities of large-bodied mammalian herbivores with ecological structures differing dramatically from those of the present day, implying that modern communities may not be suitable analogs for the ancient ecosystems of hominin evolution. To determine when and why the ecological structure of eastern Africa's herbivore faunas came to resemble those of the present, here we analyze functional trait changes in a comprehensive dataset of 305 modern and fossil herbivore communities spanning the last similar to 7 Myr. We show that nearly all communities prior to similar to 700 ka were functionally non-analog, largely due to a greater richness of non-ruminants and megaherbivores (species >1,000 kg). The emergence of functionally modern communities precedes that of taxonomically modern communities by 100,000s of years, and can be attributed to the combined influence of Plio-Pleistocene C-4 grassland expansion and pulses of aridity after similar to 1 Ma. Given the disproportionate ecological impacts of large-bodied herbivores on factors such as vegetation structure, hydrology, and fire regimes, it follows that the vast majority of early hominin evolution transpired in the context of ecosystems that functioned unlike any today. Identifying how past ecosystems differed compositionally and functionally from those today is key to conceptualizing ancient African environments and testing ecological hypotheses of hominin evolution.


英文关键词functional traits megaherbivore non-analog faunas paleoanthropology paleoecology
领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E ; SSCI
WOS记录号WOS:000491366700027
WOS关键词LARGE MAMMAL FAUNAS ; CLIMATE-CHANGE ; EASTERN AFRICA ; WOODY COVER ; PLEISTOCENE ; EVOLUTION ; EXTINCTIONS ; VEGETATION ; PATTERNS ; ARTIODACTYLA
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/205195
专题地球科学
资源环境科学
气候变化
作者单位1.Univ Utah, Nat Hist Museum Utah, Salt Lake City, UT 84108 USA;
2.Univ Utah, Dept Anthropol, Salt Lake City, UT 84112 USA;
3.Univ Massachusetts, Organism & Evolutionary Biol, Amherst, MA 01003 USA;
4.Colorado State Univ, Dept Geog & Anthropol, Ft Collins, CO 80523 USA
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GB/T 7714
Faith, J. Tyler,Rowan, John,Du, Andrew. Early hominins evolved within non-analog ecosystems[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(43):21478-21483.
APA Faith, J. Tyler,Rowan, John,&Du, Andrew.(2019).Early hominins evolved within non-analog ecosystems.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(43),21478-21483.
MLA Faith, J. Tyler,et al."Early hominins evolved within non-analog ecosystems".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.43(2019):21478-21483.
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