温度驱动的体型变化取决于全球鱼类的热量位置
Adriano Caliman1, Guilherme Daponti2, Anderson da Rocha Gripp3
1Federal University of Rio Grande do Norte (UFRN), Department of Ecology, Natal, RN, Brazil.
The Science of the total environment
|July 18, 2025
概括
由于能源限制,更温暖的气候导致捕食鱼体型 (BS) 更小. 然而,热带鱼在较低的热带位置 (TP) 较大,揭示了水生生态系统中的热带热带悖论.
科学领域:
- 生态生态学 生态生态学
- 宏观生态学 宏观生态学
- 气候变化生物学 气候变化生物学
背景情况:
- 消费者对能源的需求随着身体大小 (BS) 和温度的增加而增加.
- 随着食物网中的热量位置 (TP) 的增加,能量可用性会减少.
- 在高TP时,热能限制可能会更严格地限制消费者BS.
研究的目的:
- 为了测试高TP的消费者是否在温暖的气候下更小,因为能源限制.
- 在全球范围内调查温度和TP对鱼类BS的影响.
- 了解全球变暖如何影响水生生态系统中的鱼类BS模式.
主要方法:
- 利用了1110种海洋和淡水射线鱼物种的全球数据集.
- 对物种的遗传史的影响进行了控制.
- 在不同的TP和气候区 (热带和温带) 中比较鱼类BS.
主要成果:
- 正如预测的那样,高TP鱼类 (捕食者) 在热带生态系统中相比温带生态系统要小得多.
- 与预期相反,在热带生态系统中,低TP鱼类 (食草动物,食碎动物,食万物动物) 在热带生态系统中大于温带生态系统.
- 这种模式适用于淡水和海洋鱼类.
结论:
- 较大的热带捕食鱼面临更强大的能量限制,导致较小的BS.
- 低TP的热带鱼类可能受益于在更温暖的环境中提高饮食加工效率.
- 温度对鱼类BS的影响与TP不同,在食物网沿着热带和温带鱼类之间逆转了相对的BS模式.
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