Frugivores and the evolution of fruit colour
Frugivores and the evolution of fruit colour
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DOI：
10.1098/rsbl.2018.0377
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发表时间：
2018-09-01
期刊：
影响因子：
3.3
通讯作者：
Chapman, Colin A.
中科院分区：
文献类型：
--
作者：
Nevo, Omer;Valenta, Kim;Chapman, Colin A.
水果颜色的生态功能一直是研究的热点。最常见的假设是，水果颜色的进化是为了便于传播种子的动物发现。我们使用比较群落方法测试了果实颜色的分布是否与颜色是种子传播者进化信号的假设相一致。我们比较了两个地点成熟果实和叶子背景的对比，一个在马达加斯加，种子传播者主要是夜间活动的红绿色盲狐猴，另一个在乌干达，大多数脊椎动物种子传播者是白天活动的灵长类动物和具有更大色觉能力的鸟类。我们表明，乌干达的水果在红绿和亮度通道中与叶片背景具有更高的对比度，而马达加斯加的水果在黄蓝通道中对比度更高。这些结果表明，果实颜色已经进化到与背景叶形成对比，以响应当地种子传播者群落的视觉能力。
The ecological function of fruit colour has been the focus of many studies. The most commonly tested hypothesis is that fruit colour has evolved to facilitate detection by seed-dispersing animals. We tested whether distributions of fruit colours are consistent with the hypothesis that colour is an evolved signal to seed dispersers using a comparative community approach. We compared the contrast between ripe fruits and leaf backgrounds at two sites, one in Madagascar where seed dispersers are primarily night-active, red-green colour-blind lemurs, and the other in Uganda, where most vertebrate seed dispersers are day-active primates and birds with greater capacity for colour vision. We show that fruits in Uganda have higher contrast against leaf background in the red-green and luminance channels whereas fruits in Madagascar contrast more in the yellow-blue channel. These results indicate that fruit colour has evolved to contrast against background leaves in response to the visual capabilities of local seed disperser communities.