Same scenario, different scripts: Landscape genetics in two codistributed subterranean rodents of the genus Ctenomys

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-25 DOI:10.1111/jzo.13163

A. Austrich, F. J. Mapelli, M. J. Kittlein, A. Fameli, M. S. Mora

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Abstract

Subterranean rodents of the genus Ctenomys typically occupy fragmented habitats, many currently altered by anthropogenic development. These changes affect functional connectivity among individuals, reducing gene flow levels. This study assessed the functional connectivity of two sympatric species of subterranean rodents, Ctenomys australis and Ctenomys talarum, examining the impact of landscape changes on their population genetic structure at a fine spatial scale. We conducted a spatially continuous sampling over 12 km of coastline in Southeastern Buenos Aires Province, Argentina, genotyping 91 and 106 individuals of C. australis and C. talarum, respectively, using 10–12 microsatellite loci. We applied various spatial layers characterizing both species' habitats to evaluate the landscape configuration's effect on individual gene flow. We employed Bayesian genetic clustering methods to infer population structure levels. Ctenomys talarum showed greater structure than C. australis. NDVI temporal variation was the main factor influencing C. australis' genetic structure, whereas suitable habitat, linked to the current landscape configuration, was the most significant factor in shaping C. talarum's genetic structure. Differences in dispersal capacity and habitat specificity appear to have influenced the population genetic structures of these species. The results indicated varying sensitivities to landscape changes; temporal landscape variations primarily impacted C. australis' genetic connectivity, whereas for C. talarum, the current landscape configuration was more influential.

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同样的场景，不同的脚本：栉鼠属两种共同分布的地下啮齿动物的景观遗传学

栉鼠属的地下啮齿动物通常占据着支离破碎的栖息地，目前许多栖息地已被人为开发所改变。这些变化影响了个体间的功能连接，降低了基因流水平。本研究评估了两种同域地下啮齿动物--Ctenomys australis和Ctenomys talarum的功能连通性，在精细的空间尺度上考察了景观变化对其种群遗传结构的影响。我们在阿根廷布宜诺斯艾利斯省东南部 12 公里的海岸线上进行了空间连续采样，使用 10-12 个微卫星位点分别对 91 和 106 只 C. australis 和 C. talarum 进行了基因分型。我们应用了描述这两个物种栖息地特征的各种空间层，以评估景观配置对个体基因流的影响。我们采用贝叶斯遗传聚类方法来推断种群结构水平。Ctenomys talarum比C. australis表现出更大的结构。NDVI的时间变化是影响C. australis遗传结构的主要因素，而与当前景观配置相关的适宜栖息地则是影响C.扩散能力和栖息地特异性的差异似乎影响了这些物种的种群遗传结构。结果表明，这些物种对地貌变化的敏感性各不相同；时间性地貌变化主要影响 C. australis 的遗传连接性，而对 C. talarum 而言，当前地貌配置的影响更大。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.