缓行类动物 Mesobiotus aradasi(Binda、Pilato 和 Lisi,2005 年)广泛分布在南极半岛沿岸。

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Polar Biology Pub Date : 2024-01-30 DOI:10.1007/s00300-023-03222-9
M. Vecchi, I. Dykyy, P. Khoyetskyy, T. Vuori, S. Calhim, V. Trokhymets
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引用次数: 0

摘要

南极洲因其低温和缺乏液态水而被认为是最不适合生命生存的地方之一。然而,迟发型动物等小型动物分类群不仅在此栖息地繁衍生息,还显示出显著的生物多样性。迟发型动物是一种小型动物(体长小于 1 毫米),主要以其耐寒和耐干燥的能力而闻名,而这正是南极洲常见的压力因素。南极迟缓类属(Mesobiotus)在南极洲分布广泛,数量众多,尤其是在南极半岛,据推测,它甚至在南极大陆冻结之前就已经存在了。南极半岛记录了不同的 Mesobiotus 物种,但大多数都是基于 DNA 数据,缺乏描述物种的归属。我们采用综合分类方法(DNA 和形态学相结合)研究了南极半岛的 Mesobiotus aradasi 新种群。后者使我们能够将该物种以前的分子记录和形态记录联系起来,并绘制出一张全面的分布图。我们的研究表明,该物种几乎遍布整个南极半岛,而在南极洲其他地区却没有任何记录。这项研究强调了在处理生物多样性和分布数据时整合分子和形态学方法及其互补性的重要性。M. aradasi的分布凸显了其在南极半岛的特有性,并呼吁关注该物种未来可能面临的威胁。
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The tardigrade Mesobiotus aradasi (Binda, Pilato & Lisi, 2005) is widely distributed along the Antarctic Peninsula

Antarctica is considered one of the most inhospitable places to life due to its low temperatures and lack of liquid water. However, meiofauna taxa such as tardigrades not only thrive, but also show remarkable biodiversity in this habitat. Tardigrades are a phylum of small animals (less than 1 mm in length) mainly known for their ability to withstand freezing and desiccation, which are common stressors in Antarctica. The tardigrade genus Mesobiotus is widely distributed and abundant in Antarctica, particularly in the Antarctic Peninsula, where it is been hypothesized it was present even before the continent froze. Different Mesobiotus species have been recorded from the Antarctic Peninsula, but most are based on DNA data and lack assignment to described species. We used integrative taxonomy methods (DNA and morphology combined) on a novel population of Mesobiotus aradasi from Antarctic Peninsula. The latter allowed us to link previous molecular and morphological records of this species and to build a comprehensive map of its distribution. We show that this species is present across almost all the Antarctic Peninsula, whereas there are no records of it for any other Antarctica region. This study highlights the importance of integrating molecular and morphological methodologies and their complementarity when working with biodiversity and distribution data. The M. aradasi distribution highlights its endemicity in the Antarctic Peninsula and calls for attention to possible future threats to this species.

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来源期刊
Polar Biology
Polar Biology 生物-生态学
CiteScore
3.60
自引率
11.80%
发文量
116
审稿时长
3-8 weeks
期刊介绍: Polar Biology publishes Original Papers, Reviews, and Short Notes and is the focal point for biologists working in polar regions. It is also of interest to scientists working in biology in general, ecology and physiology, as well as in oceanography and climatology related to polar life. Polar Biology presents results of studies in plants, animals, and micro-organisms of marine, limnic and terrestrial habitats in polar and subpolar regions of both hemispheres. Taxonomy/ Biogeography Life History Spatio-temporal Patterns in Abundance and Diversity Ecological Interactions Trophic Ecology Ecophysiology/ Biochemistry of Adaptation Biogeochemical Pathways and Cycles Ecological Models Human Impact/ Climate Change/ Conservation
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