(Sub‐)Antarctic endemic cyanobacteria from benthic mats are rare and have restricted geographic distributions

IF 5.4 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Ecography Pub Date : 2024-09-19 DOI:10.1111/ecog.07489
Benoit Durieu, Valentina Savaglia, Yannick Lara, Alexandre Lambion, Igor S. Pessi, Wim Vyverman, Elie Verleyen, Annick Wilmotte
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引用次数: 0

Abstract

The Antarctic terrestrial macrobiota are highly endemic and biogeographically structured, but whether this also holds true for microbial groups remains poorly understood. We studied the biogeographic patterns of Antarctic cyanobacteria from benthic microbial mats sampled in 84 lakes from two sub‐Antarctic islands, as well as from eight Antarctic Conservation Biogeographic Regions (ACBRs) which were previously defined based mainly on macroscopic taxa. Analysis of 16S rRNA gene sequences revealed that Antarctic and sub‐Antarctic lakes host significantly different cyanobacterial communities, yet that the bioregionalization pattern did not correspond to the division into ACBRs. Both Antarctic and sub‐Antarctic lakes contain a high number of potentially endemic taxa (41% of the total diversity), of which 33.3% attain a relative abundance of < 1%. Our findings highlight the uniqueness of Antarctic microbiota and the need for increased protection of inland waters in both Antarctica and the sub‐Antarctic islands.
(来自底栖垫层的(亚)南极特有蓝藻非常罕见,且地理分布有限
南极陆地大型生物群具有高度的地方性和生物地理结构,但人们对微生物群是否也是如此仍然知之甚少。我们研究了南极蓝藻的生物地理格局,这些蓝藻来自两个亚南极岛屿的 84 个湖泊以及 8 个南极生物地理保护区(ACBRs)的底栖微生物垫。对 16S rRNA 基因序列的分析表明,南极和亚南极湖泊中的蓝藻群落明显不同,但生物区域化模式与 ACBR 的划分并不一致。南极和亚南极湖泊都含有大量潜在的特有类群(占总多样性的 41%),其中 33.3% 的类群的相对丰度达到 <1%。我们的研究结果突显了南极微生物群的独特性,以及加强保护南极洲和亚南极岛屿内陆水域的必要性。
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来源期刊
Ecography
Ecography 环境科学-生态学
CiteScore
11.60
自引率
3.40%
发文量
122
审稿时长
8-16 weeks
期刊介绍: ECOGRAPHY publishes exciting, novel, and important articles that significantly advance understanding of ecological or biodiversity patterns in space or time. Papers focusing on conservation or restoration are welcomed, provided they are anchored in ecological theory and convey a general message that goes beyond a single case study. We encourage papers that seek advancing the field through the development and testing of theory or methodology, or by proposing new tools for analysis or interpretation of ecological phenomena. Manuscripts are expected to address general principles in ecology, though they may do so using a specific model system if they adequately frame the problem relative to a generalized ecological question or problem. Purely descriptive papers are considered only if breaking new ground and/or describing patterns seldom explored. Studies focused on a single species or single location are generally discouraged unless they make a significant contribution to advancing general theory or understanding of biodiversity patterns and processes. Manuscripts merely confirming or marginally extending results of previous work are unlikely to be considered in Ecography. Papers are judged by virtue of their originality, appeal to general interest, and their contribution to new developments in studies of spatial and temporal ecological patterns. There are no biases with regard to taxon, biome, or biogeographical area.
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