在整个分布范围内, saguaro 仙人掌的数量下降与气候变化有关
Ricardo E Félix-Burruel1,2, Eugenio Larios2,3, Edgar J González4
1Posgrado en Ciencias de la Tierra, Instituto de Geología, Universidad Nacional Autónoma de Mexico, Mexico.
Annals of botany
|June 8, 2024
概括
气候变化威胁索诺拉沙漠的 saguaro 仙人掌种群,主要是由于干旱增加而阻碍新的生长. 区域差异将在它们的范围内对 saguaro 仙人掌种群产生不同的影响.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 保护生物学 保护生物学
背景情况:
- 气候变化正在增加像索诺拉沙漠这样的干旱地区的干旱频率和强度.
- 萨瓜罗仙人掌 (Carnegiea gigantea) 种群很容易受到气候变化的影响,尽管它们适应了当前的条件.
- 了解气候变化对关键物种的影响对于干旱生态系统的保护至关重要.
研究的目的:
- 评估气候变化对13个 saguaro 仙人掌种群的影响.
- 在不同的气候情景下预测未来的人口规模和增长率.
- 评估 saguaro 仙人掌种群对干旱加剧的脆弱性.
主要方法:
- 使用现场数据 (2014-2016) 开发了一个整体投影模型 (IPM).
- 在IPM描述了环境明确的人口动态.
- 人口预测是从2017年到2099年进行的,使用气候变化和无变化情景.
主要成果:
- 预计所有 saguaro 仙人掌种群的数量都将下降.
- 干旱的增加是下降的主要驱动因素,大大阻碍了招聘.
- 沿海人口面临的干旱影响比内陆人口更严重.
结论:
- 气候变化和干旱增加对索诺拉沙漠 saguaro 仙人掌种群构成重大威胁.
- 萨瓜罗的招聘特别容易受到干旱条件的加剧的影响.
- 区域气候趋势将对其范围内的 saguaro 种群产生不同的影响.
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