The microbiota playing "musical chairs" in a glacier retreat zone of maritime Antarctica

被引:0
|
作者
Veloso, Tomas Gomes Reis [1 ]
da Luz, Jose Maria Rodrigues [1 ]
da Silva, Marliane de Cassia Soares [1 ]
Souza, Jose Joao Lelis Leal [2 ]
Anastacio, Larissa Marcia [1 ]
Machado, Tiago Iglesias [1 ]
de Santana, Mateus Ferreira [3 ]
Schaefer, Carlos Ernesto Gonsalves Reynaud [2 ]
Kasuya, Maria Catarina Megumi [1 ]
机构
[1] Univ Fed Vicosa, Dept Microbiol, Lab Associacoes Micorriz LAMIC, Ave PH Rolfs S-N, BR-36570900 Vicosa, MG, Brazil
[2] Univ Fed Vicosa, Dept Solos, Ave PH Rolfs S-N, BR-36570900 Vicosa, MG, Brazil
[3] Univ Fed Vicosa, Dept Microbiol, Ave PH Rolfs S-N, BR-36570900 Vicosa, MG, Brazil
关键词
Bioinformatics; Cold environment; Anthropogenic changes; Microbial DNA; Bioprospecting; Biotechnology; Microbial networks; BACTERIAL COMMUNITIES; SOIL; SUCCESSION; DIVERSITY; ECOSYSTEM; SHIFTS;
D O I
10.1016/j.apsoil.2025.106050
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Most of the Antarctic continent and surrounding islands are permanently covered by ice. However, due to longterm natural and short term human-induced climate changes, glaciers in the maritime Antarctic islands are currently retreating, exposing new substrates for colonization by microorganisms and plants. Therefore, the aim of this study was to characterize the microbial communities along a transect comprised of soils with different exposition times since the glacier retreat in Barton Peninsula (King George Island). We observed an intense degree of microbial succession in young soils located in the Recently Exposed Area (REA), analogously to a game of 'musical chairs' where microbial species rapidly occupy available niches as new environments emerge. In contrast, more developed soils exhibited a less dynamic community turnover. The co-occurrence networks of both bacteria and fungi presented a less modular structure and a higher connectance in the REA, whereas a more modular structure was found in the three networks of the more developed soils. This suggests that these communities are more susceptible to external perturbations and microbial succession. Furthermore, the functional prediction demonstrated that the functional redundancy is lower in the REA than in more developed soils. The surprising high diversity of microbial communities adjacent to the glacier front deserves further studies to compare with different areas (in terms of substrate, climate) under a common present-day warming scenario.
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页数:11
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