蟋蟀草(Crassulaceae)有限的地理分布:对保护一种微型特有、栖息地专家和墨西哥观赏植物的影响

IF 1 4区 生物学 Q3 PLANT SCIENCES
Bárbara M. Rojas-Flores, Cristina Martínez-Garza, María Teresa Pulido Silva, Alejandra Vázquez-Lobo, Amanda Ortiz-Sánchez, Raúl E. Alcalá
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引用次数: 0

摘要

关于物种地理分布范围和影响物种地理分布范围的因素的信息,是确定保护重点和保护生物多样性的宝贵工具。我们重点研究了仅分布于墨西哥中部莫雷洛斯州(特波兹兰市)北部地区的一种栖息地专性、微型特有和观赏物种--Cremnophila nutans(十字花科)。根据国际自然保护联盟制定的标准,我们估算了 C. nutans 的分布范围(34.9 平方公里)和栖息面积(36 平方公里)。根据我们的估计,C. nutans 可被视为极度濒危物种。根据气候和地貌层组合确定的可进入的广阔区域,生态位建模(22 条出现记录和 3 个生物气候变量)预测了一个限制性和伸展性高的栖息地带,主要与莫雷洛斯州北部地区相吻合。年平均气温(72.5%)和年降水量(25.3%)解释了栖息地适宜性。具有气候适宜栖息地的潜在区域实际上可能较小,因为 nutans 通常定居的岩石露头并不存在于整个潜在区域。除了有限的地理分布外,果蝇草还面临着频繁的森林火灾、气候变化以及从其自然栖息地开采等威胁。为确保这一独特稀有植物物种的持续存在,我们提出了以异地繁殖和与当地人合作为基础的管理策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Restricted geographical distribution of Cremnophila Nutans (Crassulaceae): implications to the conservation of a micro-endemic, habitat specialist and ornamental Mexican plant

Restricted geographical distribution of Cremnophila Nutans (Crassulaceae): implications to the conservation of a micro-endemic, habitat specialist and ornamental Mexican plant

Information on the extent of the geographic distribution and on the factors affecting the species geographic range is a valuable tool to identify conservation priorities and to protect biodiversity. We focused on Cremnophila nutans (Crassulaceae), a habitat specialist, micro-endemic and ornamental species distributed only in northern areas of the state of Morelos (municipality of Tepoztlan) in central Mexico. Following the criterions established by the International Union for Conservation of Nature, we estimated the range extent (34.9 km2) and area of occupancy (36 km2) of C. nutans. Based on our estimations C. nutans can be considered as a critically endangered species. From an extensive area of accessibility determined by combinations of climate and physiographic layers, the ecological niche modeling (22 occurrence records and three bioclimatic variables) predicted a restricted and stretch band of high habitat suitability coinciding majorly with northern areas of the state of Morelos. Habitat suitability was explained by annual mean temperature (72.5 %) and annual precipitation (25.3%). Potential areas with climatically suitable habitats could be in fact smaller because rocky outcrops usually colonized by C. nutans are not present along the entire potential area. Besides its restricted geographic distribution, C. nutans face threats derived from frequent forest fires, climate change, and extraction from its natural habitat. Management strategies strongly based on ex situ propagation and social working with local people are proposed to assure persistence of this unique rare plant species.

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来源期刊
Folia Geobotanica
Folia Geobotanica 生物-植物科学
CiteScore
2.40
自引率
0.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: The journal Folia Geobotanica publishes articles in vegetation science, plant ecology and plant systematics, including the topics of temporal community patterns, population and ecosystem ecology, and invasion and conservation ecology. Within the field of plant systematics, Folia Geobotanica welcomes papers on systematic and evolutionary botany, including phylogenetic reconstructions, phylogeographic and biogeographic inferences, studies of microevolutionary processes, taxonomic studies, and broader taxonomic revisions.
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