Is the general threatened status of four mammal groups affected by taxonomic changes over time?

IF 2.2 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Journal for Nature Conservation Pub Date : 2024-09-18 DOI:10.1016/j.jnc.2024.126736
Giovanni Amori , Luca Luiselli
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Abstract

The geographic range is a critical factor in assessing species’ threatened status on the IUCN Red List. A smaller geographic range increases the likelihood of a species being classified as threatened. Taxonomic revisions, which can split a widely distributed taxon into multiple smaller-range species, may elevate the threatened status for these newly recognized species. While taxonomic splitting is thought to increase the perceived threatened status of species, data on birds suggest the opposite, with newly recognized species being less threatened. No similar analysis has been conducted for mammals until now. This study compares the relationship between the number of recognized and threatened species in four mammalian orders (Carnivora, Cetartiodactyla, Chiroptera, and Rodentia) between 2005 and 2022. It was found that increases in species numbers due to taxonomic revisions correlated with increases in threatened species, particularly in Primates and Cetartiodactyla. The overall threatened status of these groups changed over time, with Primates and Cetartiodactyla becoming more threatened, while Rodentia became less threatened. We emphasize the need for consistent criteria in IUCN assessments to avoid biases, and we recommend that changes in the threatened status should only occur with robust evidence.

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四个哺乳动物类群的总体濒危状况是否受到分类学随时间变化的影响?
在世界自然保护联盟红色名录中,地理范围是评估物种受威胁状况的关键因素。地理范围越小,物种被列为濒危物种的可能性就越大。分类学修订可将一个分布广泛的类群拆分为多个分布范围较小的物种,这可能会提高这些新确认物种的受威胁地位。虽然分类学拆分被认为会提高物种的受威胁程度,但鸟类的数据却表明情况恰恰相反,新确认的物种受威胁程度较低。到目前为止,还没有对哺乳动物进行过类似的分析。本研究比较了 2005 年至 2022 年间四个哺乳纲(食肉目、食肉目、脊兽目和啮齿目)中公认物种数量与受威胁物种数量之间的关系。研究发现,分类学修订导致的物种数量增加与受威胁物种的增加相关,尤其是在灵长目和鲸目。随着时间的推移,这些类群的整体濒危状况也发生了变化,灵长类和鲸目动物的濒危程度有所提高,而啮齿类动物的濒危程度有所降低。我们强调,世界自然保护联盟的评估标准必须保持一致,以避免出现偏差,并建议只有在证据确凿的情况下才能改变濒危状况。
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来源期刊
Journal for Nature Conservation
Journal for Nature Conservation 环境科学-生态学
CiteScore
3.70
自引率
5.00%
发文量
151
审稿时长
7.9 weeks
期刊介绍: The Journal for Nature Conservation addresses concepts, methods and techniques for nature conservation. This international and interdisciplinary journal encourages collaboration between scientists and practitioners, including the integration of biodiversity issues with social and economic concepts. Therefore, conceptual, technical and methodological papers, as well as reviews, research papers, and short communications are welcomed from a wide range of disciplines, including theoretical ecology, landscape ecology, restoration ecology, ecological modelling, and others, provided that there is a clear connection and immediate relevance to nature conservation. Manuscripts without any immediate conservation context, such as inventories, distribution modelling, genetic studies, animal behaviour, plant physiology, will not be considered for this journal; though such data may be useful for conservationists and managers in the future, this is outside of the current scope of the journal.
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