气候变化领域集成服务门户(CCPortal): Body size downgrading of mammals over the late Quaternary

CCPortal

DOI	10.1126/science.aao5987
	Body size downgrading of mammals over the late Quaternary
	Smith F.A.; Smith R.E.E.; Lyons S.K.; Payne J.L.
发表日期	2018
ISSN	0036-8075
起始页码	310
结束页码	313
卷号	360 期号:6386
英文摘要	Since the late Pleistocene, large-bodied mammals have been extirpated from much of Earth. Although all habitable continents once harbored giant mammals, the few remaining species are largely confined to Africa. This decline is coincident with the global expansion of hominins over the late Quaternary. Here, we quantify mammalian extinction selectivity, continental body size distributions, and taxonomic diversity over five time periods spanning the past 125,000 years and stretching approximately 200 years into the future. We demonstrate that size-selective extinction was already under way in the oldest interval and occurred on all continents, within all trophic modes, and across all time intervals. Moreover, the degree of selectivity was unprecedented in 65 million years of mammalian evolution. The distinctive selectivity signature implicates hominin activity as a primary driver of taxonomic losses and ecosystem homogenization. Because megafauna have a disproportionate influence on ecosystem structure and function, past and present body size downgrading is reshaping Earth's biosphere. Copyright © 2018 The Authors.
英文关键词	body size; ecosystem function; ecosystem structure; evolution; extinction; heritability; hominid; mammal; Quaternary; taxonomy; Article; biodiversity; biosphere; body mass; body size; body temperature measurement; Cenozoic; climate change; comparative study; demography; ecosystem health; ecosystem resilience; fossil hominid; human; human activities; Late Holocene; Late Quaternary; livestock; nonhuman; Oligocene; paleoenvironment; prediction; priority journal; risk factor; species extinction; survivor; taxonomy; terrestrial species; Upper Pleistocene; urbanization; victim; animal; evolution; fossil; hominid; physiology; species extinction; Africa; Mammalia; Animals; Biological Evolution; Body Size; Extinction, Biological; Fossils; Hominidae; Humans
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245523
作者单位	Department of Biology, University of New Mexico, Albuquerque, NM 87131, United States; Department of Mathematics, University of California, San Diego, San Diego, CA 92093, United States; School of Biological Sciences, University of Nebraska-Lincoln, Lincoln, NE 68588, United States; Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States
推荐引用方式 GB/T 7714	Smith F.A.,Smith R.E.E.,Lyons S.K.,et al. Body size downgrading of mammals over the late Quaternary[J],2018,360(6386).
APA	Smith F.A.,Smith R.E.E.,Lyons S.K.,&Payne J.L..(2018).Body size downgrading of mammals over the late Quaternary.Science,360(6386).
MLA	Smith F.A.,et al."Body size downgrading of mammals over the late Quaternary".Science 360.6386(2018).