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环境变量驱动哺乳动物中食物营养多样性的空间模式

Jaron Adkins¹, Edd Hammill¹, Umarfarooq A Abdulwahab¹

¹The Department of Watershed Sciences and The Ecology Center, Utah State University, Logan, Utah, USA.

Ecology letters

|September 11, 2023

概括

降水季节性和总初级产量 (GPP) 等环境因素驱动着陆地哺乳动物物种的丰富性和全球热带群体内的比例多样性. 适度的环境变化支持更高的哺乳动物多样性.

科学领域:

生态生态学生态生态学
全球变化生物学
哺乳动物学哺乳动物学

背景情况:

了解物种多样性的驱动因素至关重要,特别是在气候变化方面.
不同的营养组 (捕食者,食肉动物,食草动物) 独特地对环境因素做出反应.
需要对哺乳动物多样性驱动因素进行全球范围的分析.

研究的目的:

确定全球各热带群的陆地哺乳动物总和比例物种丰富性的关键环境驱动因素.
研究环境异质性和资源可用性如何塑造哺乳动物多样性模式.

主要方法:

利用随机森林模型分析全球范围的陆地哺乳动物物种丰富性数据.
评估了环境变量对掠食者,食肉动物和草食动物群体丰富性的影响.
研究了总初级产量 (GPP) 与每个热带群体的相对丰度之间的关系.

主要成果:

降水季节性成为所有热带群体物种丰富性的最重要的预测因素.
陆地哺乳动物的丰富性在降水季节性的中间水平上达到顶峰,这表明了最佳的环境异质性.
总初级产量 (GPP) 是热带群体中物种丰富度比例的主要相关系数.
基底资源的可用性,由GPP表示,显著影响了哺乳动物多样性的结构在整个食物营养水平.

结论:

影响资源时间变化和丰富性的环境驱动因素对于全球预测陆地哺乳动物丰富性至关重要.
降雨季节性和GPP是塑造陆地哺乳动物群体整体多样性和食物营养结构的关键因素.
保护战略必须考虑这些环境驱动因素,以便在不断变化的全球条件下有效管理哺乳动物的多样性.

关键词:

全球生物多样性全球生物多样性哺乳动物的多样性种类丰富性种类丰富性奖杯多样性奖杯多样性奖杯级别奖杯级别奖杯级别

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