DOI: 10.1111/ele.12872
Scopus记录号: 2-s2.0-85038007723
论文题名: Rarity and persistence
作者: Vermeij G.J. ; Grosberg R.K.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2018
卷: 21, 期: 1 起始页码: 3
结束页码: 8
语种: 英语
英文关键词: Biodiversity
; external fertilisation
; extinction
; gamete transfer
; historical trends
; internal fertilisation
; pollination
; population density
; rain forests
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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107524
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA, United States; Department of Evolution and Ecology, Coastal and Marine Sciences Institute, University of California, Davis, Davis, CA, United States
Recommended Citation:
Vermeij G.J.,Grosberg R.K.. Rarity and persistence[J]. Ecology Letters,2018-01-01,21(1)