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五种新热带食肉动物的占地和多样性在整个大陆范围内下降
Florencia Grattarola1, Kateřina Tschernosterová1, Petr Keil1
1Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Praha - Suchdol 16500, Czech Republic.
概括
在过去的二十年中,新热带肉食动物种群大幅减少,多样性丧失集中在查科地区. 这些发现凸显了这些物种的紧急保护需求.
科学领域:
- 生态与保护生物学 生态与保护生物学
- 生物多样性研究 生物多样性研究
- 种类分布建模 种类分布建模
背景情况:
- 新热带地区是一个重要的生物多样性热点,面临着广泛的土地利用变化.
- 缺乏对该地区大陆范围物种分布的时间分析.
- 了解范围动态对于有效的保护战略至关重要.
研究的目的:
- 为了建模五种新热带食肉动物物种占用区域的时间变化.
- 为了确定大陆范围的物种分布变化的热点.
- 评估两十年来物种多样性和物种周转变的变化.
主要方法:
- 综合物种分布模型 (ISDM) 在贝叶斯框架内使用.
- 种类分布模型应用于两个不同的时间段 (2000-2013年和2014-2021年).
- 分析包括绘制时间变化的地图,确定收益和损失的热点,并计算物种周转率.
主要成果:
- 大多数研究的食肉动物物种在过去二十年中经历了其占用面积的下降.
- 物种多样性下降,特别是在查科地区.
- 在Chaco,Caatinga和墨西哥西北部确定了快速物种组成周转的热点.
结论:
- 该研究揭示了新热带食肉动物范围和多样性的惊人下降,挑战了目前的IUCN威胁分类.
- 确定的变化热点与重大土地利用转型相关.
- 这种新的方法提供了对物种范围转移的动态评估,这对于不足采样的地区和未来的保护评估至关重要.
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