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评估临灭绝的热带大植物Nepenthes talangensis灭绝风险的综合方法

Angga Yudaputra¹, Inggit Puji Astuti¹, Tri Handayani¹

¹Research Center for Plant Conservation, Botanic Gardens, and Forestry-National Research and Innovation Agency (BRIN), Bogor, Indonesia.

|August 7, 2023

概括

高原热带盆栽植物Nepenthes talangensis面临着由于环境威胁而面临的灭绝风险增加. 新的研究表明了更高的威胁类别,并强调了对这种罕见植物的保护努力的必要性.

科学领域:

生态生态学生态生态学
保护生物学保护生物学
植物学植物学

背景情况:

23年来,Nepenthes talangensis的保护状况没有得到更新,尽管人类和环境威胁日益增加.
了解物种的生态和保护需求对于管理野生种群和评估灭绝风险至关重要.
对于有效的保护战略,需要有关人口分布,生态要求和气候变化影响的新数据.

研究的目的:

根据当前的生态数据和威胁评估,重新评估Nepenthes talangensis的保护状况.
确定影响N. talangensis.分布和生存的关键生态因素.
模拟未来气候变化对N. talangensis.适合息地的影响.

主要方法:

现场调查以确定N. talangensis的新发生记录.
使用随机森林 (RF) 和人工神经网络 (ANN) 与关键环境变量进行生态利基建模.
人口结构分析侧重于生殖和不育的个体.
根据当前和未来的气候变化场景 (SSP 1-2.6和SSP 5-8.5) 进行息地适宜性建模.

主要成果:

在Talang山发现了14个N. talangensis的新发病记录.
高度,树冠覆盖,土壤pH值和斜率被确定为关键的生态变量.
人口结构倾向于青少年和不育的个体,很少有成熟的男性和女性.
目前适宜的息地估计为1,076公,主要位于海拔1,740-2,558米之间.
预计在两个气候变化情景下,适合息地将减少并转移到更高的海拔,在SSP 5-8.5下,损失更大.
植物园的现场保护表明,幼苗和切片的生存率很高 (83.4%).

结论:

尼潘特斯·塔朗格尼斯 (Nepenthes talangensis) 应被列入更高的威胁类别,被提议作为危危物 (CR B1ab(iii,v,C2a(ii)),这是从以前的危物 (EN C2b,ver 2.3) 提升的.
气候变化构成重大威胁,迫切需要采取保护行动,保护剩余和潜在的未来息地.
成功的现场保护策略对于物种的长期生存至关重要,它补充了现场保护工作.

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