Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1086/303412 |
Ecological character displacement in adaptive radiation | |
Schluter, D | |
通讯作者 | Schluter, D |
来源期刊 | AMERICAN NATURALIST
![]() |
ISSN | 0003-0147 |
出版年 | 2000 |
卷号 | 156页码:S4-S16 |
英文摘要 | I give an overview of the observational and experimental evidence for ecological character displacement in adaptive radiation. Sixty-one published cases of character displacement involving closely related species (congeners) make up the observational data set. All cases involve divergence, even though parallel and convergent displacement are theoretically possible. Character ratios in sympatry were greatest when displacement was symmetric (mean 1.54) and least when asymmetric (mean 1.29), perhaps because the most symmetric resource distributions are also the broadest. Carnivores are vastly overrepresented in the data compared with other trophic groups, with herbivores the next most common category. I consider five hypotheses to explain this pattern, including the possibility that the likelihood of divergence via competition depends on position in food webs. Overall, the quality and completeness of observational data has improved in recent pars, as judged by the extent to which individual cases satisfy six standard criteria. All but one of the criteria are met in over half the cases. Most often lacking is independent evidence that the species involved compete for resources. For this reason, we cannot be sure that divergence in sympatry is usually the result of resource competition rather than some other interaction. Field experiments on character displacement, which explore how interaction strength changes per unit change in phenotypic traits, are only just beginning. I summarize research on threespine sticklebacks that used experiments in ponds to test three predictions: that present-day differences between sympatric species are a "ghost" of competition past; that adding a competitor alters natural selection pressures on a species already present, favoring divergence; and that divergent natural selection stemming from resource competition is frequency dependent. In total, the evidence suggests that character displacement occurs frequently in nature, and it probably plays an important role in the evolution of diversity in many adaptive radiations. |
英文关键词 | adaptive radiation character displacement coevolution of competitors divergence interspecific competition |
类型 | Article |
语种 | 英语 |
国家 | Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000089658200002 |
WOS关键词 | SYMPATRIC STICKLEBACKS GASTEROSTEUS ; COOCCURRING DYTISCID BEETLES ; DESERT RODENT COMMUNITY ; INDIAN ANOLIS LIZARDS ; INTERSPECIFIC COMPETITION ; FIELD EXPERIMENTS ; BRITISH-COLUMBIA ; EVOLUTIONARY CONSEQUENCES ; MORPHOLOGICAL PATTERNS ; PREY COMMUNITIES |
WOS类目 | Ecology ; Evolutionary Biology |
WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/138497 |
作者单位 | (1)Univ British Columbia, Dept Zool, Vancouver, BC V6T 1Z4, Canada;(2)Univ British Columbia, Ctr Biodivers Res, Vancouver, BC V6T 1Z4, Canada;(3)Univ British Columbia, Peter Wall Inst Adv Studies, Vancouver, BC V6T 1Z4, Canada |
推荐引用方式 GB/T 7714 | Schluter, D. Ecological character displacement in adaptive radiation[J],2000,156:S4-S16. |
APA | Schluter, D.(2000).Ecological character displacement in adaptive radiation.AMERICAN NATURALIST,156,S4-S16. |
MLA | Schluter, D."Ecological character displacement in adaptive radiation".AMERICAN NATURALIST 156(2000):S4-S16. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Schluter, D]的文章 |
百度学术 |
百度学术中相似的文章 |
[Schluter, D]的文章 |
必应学术 |
必应学术中相似的文章 |
[Schluter, D]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。