Foliage color contrasts and adaptive fruit color variation in a bird-dispersed plant community
Foliage color contrasts and adaptive fruit color variation in a bird-dispersed plant community
复制标题
鸟类散布植物群落的叶色对比和适应性果实颜色变化
DOI：
10.1034/j.1600-0706.2002.960308.x
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发表时间：
2002-03-01
期刊：
影响因子：
3.4
通讯作者：
Dalen, JL
中科院分区：
文献类型：
--
作者：
Burns, KC;Dalen, JL
分布在脊椎动物中的果实的颜色一直是150多只熊研究的一个来源，但生态和进化过程或果实颜色多样性仍然难以捉摸。我们测试了水果颜色随时间变化的假设。以最大限度地突出树叶颜色的季节变化。在北美西部的一个鸟类分散的植物群落中。田间观察表明，虽然红色果实占主导地位，在夏季期间的绿色叶片着色。黑色的果实是在秋季红橙色叶子着色的过程中产生的，尽管有两个物种不符合这种模式。一个探针需要其自身的对比背景颜色。通过有色的苞片。我们进行了实验操作的水果颜色和人工背景的颜色，以测试这两个因素是否有协同效应的水果去除率。水果和背景颜色之间的相互作用解释了实验水果去除率的变化。虽然红色果实迅速除去绿色背景，偏好黑色果实的红橙色背景是不太明显，因此，在果实颜色的时间模式似乎是由于水果显着性提高对叶色的季节性变化。支持这一假设表明，水果颜色多样性，树叶颜色对比度和鸟类的颜色偏好之间的时间连接。
The color of vertebrate-dispersed fruits has been a source of inquire for over 150 bears, yet the ecological and evolutionary, processes responsible or fruit color diversity remain elusive. We tested the hypothesis that fruit color varies temporally. to maximize conspicuousness against seasonal changes in foliage coloration. in a bird-dispersed plant community in western North America. Field observations showed that while red fruits predominate during summer periods of green Foliage coloration. black fruits are produced during flushes of red-orange foliage coloration in autumn, Although two species did not conform to this pattern. one prod need its own contrasting background color. via colored bracts. We conducted experimental manipulations of both fruit color and the color of artificial backgrounds to test whether both factors had a synergistic effect on fruit removal rates. Interactions between fruit and background color explained most of the variation in experimental fruit removal rates. Although red fruits were removed rapidly on green backgrounds, preference for black fruits on red-orange backgrounds was less pronounced, Consequently, the temporal pattern in fruit color appears to result from elevated fruit conspicuousness against seasonal changes in foliage coloration. Support for this hypothesis suggests a temporal connection between fruit color diversity foliage color contrasts and avian color preferences.