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不正规的养方式的反复进化驱动着蜂鸟脚尺寸和嘴巴长度之间的负相关性

Robert K Colwell, Thiago F Rangel, Karolina Fučíková

The American naturalist

|November 14, 2023

概括

鸟的脚形态,特别是的爪子长度,令人惊的是与长度有关. 这种适应使某些物种能够有效地依附和食各种花朵,从而减少能源消耗.

科学领域:

鸟类学鸟类学是一门学科.
生物力学生物力学
进化生物学进化生物学

背景情况:

蜂鸟 bill 形态学是花朵适应的良好研究.
蜂鸟脚形态及其在养行为中的功能意义仍然不太被探索.
蜂鸟表现出不同的养策略,包括合法授粉和花蜜抢劫.

研究的目的:

调查鸟脚的功能变化,特别是与养行为有关的功能变化.
为了确定蜂鸟的足形态,特别是哈卢克斯爪长,是否与嘴巴长度和食策略相关.
了解脚形态在蜂鸟与花朵相互作用中的适应性意义.

主要方法:

测量了220种蜂鸟物种的 bill 和 foot (hallux claw) 的特征.
根据养行为,将物种分为"粘着物种" (66 种) 和"非粘着物种" (144 种).
在统计上考虑了家族遗传信号,身体大小和高度.

主要成果:

在蜂鸟中,长度和爪长度之间发现了显著的负相关性.
拥有短嘴和长爪 (clingers) 的物种已经独立进化了20多次.
爬行动物利用生物机械增强的脚节省能量,当食短冠状花或从长冠状花中抢夺花蜜时.

结论:

蜂鸟的足形态,特别是长长的爪,是节能养的关键适应,特别是在有短嘴的物种中.
这种适应促进了各种蜂鸟种群的合法授粉和花蜜掠夺.
花的形态影响着蜂鸟的养策略,更倾向于长嘴的物种和短爪的翔.

关键词:

行为遗传学行为遗传学坚持坚持坚持的坚持进化趋同 - - 进化趋同功能形态学功能形态学哈卢克斯爪子的爪子是什么意思抢劫花蜜抢劫花蜜抢劫花蜜

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