气候变化领域集成服务门户(CCPortal): Rarity and persistence

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DOI	10.1111/ele.12872
	Rarity and persistence
	Vermeij G.J.; Grosberg R.K.
发表日期	2018
ISSN	1461023X
卷号	21 期号:1
英文摘要	Rarity is a population characteristic that is usually associated with a high risk of extinction. We argue here, however, that chronically rare species (those with low population densities over many generations across their entire ranges) may have individual-level traits that make populations more resistant to extinction. The major obstacle to persistence at low density is successful fertilisation (union between egg and sperm), and chronically rare species are more likely to survive when (1) fertilisation occurs inside or close to an adult, (2) mate choice involves long-distance signals, (3) adults or their surrogate gamete dispersers are highly mobile, or (4) the two sexes are combined in a single individual. In contrast, external fertilisation and wind- or water-driven passive dispersal of gametes, or sluggish or sedentary adult life habits in the absence of gamete vectors, appear to be incompatible with sustained rarity. We suggest that the documented increase in frequency of these traits among marine genera over geological time could explain observed secular decreases in rates of background extinction. Unanswered questions remain about how common chronic rarity actually is, which traits are consistently associated with chronic rarity, and how chronically rare species are distributed among taxa, and among the world's ecosystems and regions. © 2017 John Wiley & Sons Ltd/CNRS
英文关键词	Biodiversity; external fertilisation; extinction; gamete transfer; historical trends; internal fertilisation; pollination; population density; rain forests
语种	英语
scopus关键词	adult; biodiversity; dispersal; extinction; extinction risk; fertilization (reproduction); gamete; geological time; historical record; mate choice; persistence; plant-pollinator interaction; pollination; population density; rainforest; rare species; rarity; survival; animal; ecosystem; invertebrate; population density; Animals; Ecosystem; Invertebrates; Population Density
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121365
作者单位	Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA 95616, United States; Department of Evolution and Ecology, Coastal and Marine Sciences Institute, University of California, Davis, Davis, CA 95616, United States
推荐引用方式 GB/T 7714	Vermeij G.J.,Grosberg R.K.. Rarity and persistence[J],2018,21(1).
APA	Vermeij G.J.,&Grosberg R.K..(2018).Rarity and persistence.Ecology Letters,21(1).
MLA	Vermeij G.J.,et al."Rarity and persistence".Ecology Letters 21.1(2018).