Risk assessment of habitat suitability decline for the endangered riparian tree Pterocarya tonkinensis (Juglandaceae): conservation implications

IF 2.6 2区农林科学 Q1 FORESTRY European Journal of Forest Research Pub Date : 2024-03-23 DOI:10.1007/s10342-024-01679-9

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Abstract

Tonkin wingnut is the rarest species within the relict tree genus Pterocarya (Juglandaceae), known from only a few isolated stands in the Indo-Burman hotspot. Despite its classification as a vulnerable species, Pterocarya tonkinensis has received comparatively less attention than other wingnut species, leading to a limited understanding of its distribution patterns. In this study, we utilize spatial distribution modeling with MAXENT software and conservation prioritization methods implemented in ZONATION to estimate the potential range of species, identify the key environmental variables influencing its habitat, and designate potential areas for conservation. We used a set of 45 known species populations, the set of bioclimatic variables, and the proximity of watercourses to create the model of the potential range. The results indicate two main centers of potential climatically suitable areas for the species in the future - in southern Yunnan (China) and Vietnam. The calculated total suitable area (292,365.67 km²) is similar to the estimated extent of species occurrence but may decline in the future. Highly suitable areas near the rivers cover around 19,000 km². The most important factors shaping species occurrence were those related to temperature amplitude (around 60% of contribution to the models). The seasonality of precipitation and distance from watercourses also have a significant impact. Assessment of potential reserves has identified the need for protected areas in southern China and points to the possibility of expanding reserves in Vietnam. The fact that river valleys are often densely populated can be an obstacle to the conservation of species.

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濒危河岸树种越南紫檀（Juglandaceae）栖息地适宜性下降的风险评估：对保护的影响

摘要 Tonkin 翼核桃是孑遗树种翼核桃属（Juglandaceae）中最稀有的物种，目前仅从印度-缅甸热点地区的少数孤立植株中发现。尽管越南胡桃被列为易危物种，但与其他胡桃树种相比，越南胡桃受到的关注相对较少，导致人们对其分布模式的了解有限。在本研究中，我们利用 MAXENT 软件的空间分布建模和 ZONATION 实现的保护优先级排序方法来估计物种的潜在分布范围，确定影响其栖息地的关键环境变量，并指定潜在的保护区域。我们利用一组 45 个已知物种种群、一组生物气候变量和水道邻近程度来创建潜在分布区模型。结果表明，未来该物种的潜在气候适宜区有两个主要中心--中国云南南部和越南。计算得出的适宜区总面积（292,365.67 平方公里）与估计的物种分布范围相似，但未来可能会减少。河流附近的高适宜区面积约为 19,000 平方公里。影响物种出现的最重要因素是与温度振幅有关的因素（约占模型贡献的 60%）。降水的季节性和与河道的距离也有重要影响。对潜在保护区的评估确定了在中国南部建立保护区的必要性，并指出了在越南扩大保护区的可能性。河谷地区通常人口稠密，这可能会成为保护物种的障碍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

European Journal of Forest Research 农林科学-林学

CiteScore

5.10

自引率

3.60%

发文量

审稿时长

6-16 weeks

期刊介绍： The European Journal of Forest Research focuses on publishing innovative results of empirical or model-oriented studies which contribute to the development of broad principles underlying forest ecosystems, their functions and services. Papers which exclusively report methods, models, techniques or case studies are beyond the scope of the journal, while papers on studies at the molecular or cellular level will be considered where they address the relevance of their results to the understanding of ecosystem structure and function. Papers relating to forest operations and forest engineering will be considered if they are tailored within a forest ecosystem context.