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生理和形态特征影响当代范围的扩张,并对两动物物种的物种分布建模的影响

Owen M Edwards^1,2, Lu Zhai³, Michael S Reichert¹

¹Department of Integrative Biology, Oklahoma State University, Stillwater, Oklahoma, USA.

The Journal of animal ecology

|October 28, 2024

概括

由于气候变化,绿色树正在将其范围向北移动,其扩大的种群显示了热耐受性和腿长度的适应. 这种种类内变异提高了物种分布模型的准确性,用于预测气候引起的范围变化.

科学领域:

生态学和进化生物学.
气候变化生物学气候变化生物学
两动物保护协会

背景情况:

由于气候变化,物种正在改变它们的地理范围.
两动物对气候变化非常敏感,但对极地分布的转移在这个群体中没有得到充分记录.
属性内的特征变化可能促进或阻碍范围的变化,但其作用尚不清楚.

研究的目的:

研究由气候变化驱动的绿色树 (Hyla cinerea) 范围转移中的物种内变化的作用.
为了测试最近扩大范围的种群是否与历史种群相比表现出不同的特征 (耐热,形态).
评估物种内部变异对预测范围转移的物种分布模型 (SDM) 准确性的影响.

主要方法:

在Hyla cinerea的历史和最近扩大的种群之间比较热耐受性 (临界热最小值,热宽度) 和腿长度.
开发和比较物种分布模型 (SDMs),使用整个物种范围或历史和扩展种群的单独数据.
评估模型准确性,以确定特定种群的SDM是否可以改善对气候引起的范围变化的预测.

主要成果:

临界热最小值随着度的增加而减少,热宽度的增加,在扩大的人口中具有更强大的度效应.
来自扩大种群的个体与历史种群的个体相比,表现出更长的腿长.
一个人口级的SDM显示出比物种级的SDM更高的准确性,这表明预测能力有所提高.

结论:

热耐受性和与分散相关的形态 (腿长) 的种类内变化与两动物范围的快速扩张有关,并促进了这种变化.
通过对不同种群进行建模来考虑种内变异,可以提高SDM在预测气候驱动范围变化的准确性.
进一步研究沿着气候梯度的物种内部变化的机制对于完善未来气候变化下的SDM预测至关重要.

关键词:

这里是Hyla cinerea.科 (Hylidae) 是一个科.气候变化气候变化气候变化扩散散散的分散.绿色树青树息地的适宜性息地的适宜性范围的变化范围的变化范围.热承受能力热承受能力

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