Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/03-3138 |
Insect seed predators as novel agents of selection on fruit color | |
Whitney, KD; Stanton, ML | |
通讯作者 | Whitney, KD |
来源期刊 | ECOLOGY
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ISSN | 0012-9658 |
EISSN | 1939-9170 |
出版年 | 2004 |
卷号 | 85期号:8页码:2153-2160 |
英文摘要 | The ecological and evolutionary dynamics of fruit color polymorphisms remain poorly known because patterns and agents of selection have rarely been identified. Here, we examine Acacia ligulata, a shrub of the Australian arid zone characterized by a red/yellow/orange aril color polymorphism. Seed production patterns over four populations and three years suggested that spatially variable selection may be acting to maintain the polymorphism: red and yellow aril color morphs each had the highest seed production in alternate sites. Seed production differences between morphs were a function of both intrinsic plant characters (fruit production) and predispersal seed predation, which affects the number of viable seeds matured per ovule. Fruit production differences are hypothesized to result from a genotype-by-environment interaction, perhaps related to plant vigor. In contrast, morph differences in the numbers of viable seeds per ovule are produced via differential seed predation by heteropteran insects, as demonstrated by exclusion experiments. Because these predators feed when aril color is not visible, differential predation is evidently a response to pleiotropic effects of fruit color alleles. We suggest that such pleiotropic effects may be a common feature of fruit color polymorphisms, and that the most obvious selective agents (that is, seed dispersers) may not always be the most important. |
英文关键词 | Acacia Acacia ligulata Australian arid zone Coleotichus fruit color polymorphism insect seed predators Melanterius pleiotropic effects pre-dispersal seed predation seed production patterns spatially variable selection Trichilogaster |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000223824300012 |
WOS关键词 | FLOWER-COLOR ; CAPTIVE SILVEREYES ; RUBUS-SPECTABILIS ; POLYMORPHISM ; PERFORMANCE ; DISPERSAL ; CHOICES ; ACACIA ; EVOLUTION ; AUSTRALIA |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of California, Davis |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/146611 |
作者单位 | (1)Univ Calif Davis, Ctr Populat Biol, Davis, CA 95616 USA;(2)Univ Calif Davis, Sect Evolut & Ecol, Davis, CA 95616 USA |
推荐引用方式 GB/T 7714 | Whitney, KD,Stanton, ML. Insect seed predators as novel agents of selection on fruit color[J]. University of California, Davis,2004,85(8):2153-2160. |
APA | Whitney, KD,&Stanton, ML.(2004).Insect seed predators as novel agents of selection on fruit color.ECOLOGY,85(8),2153-2160. |
MLA | Whitney, KD,et al."Insect seed predators as novel agents of selection on fruit color".ECOLOGY 85.8(2004):2153-2160. |
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