Microbes and Biogeochemical Cycling in Terrestrial Ecosystems under Climate Change

A special issue of Microorganisms (ISSN 2076-2607). This special issue belongs to the section "Environmental Microbiology".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 326

Special Issue Editor


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Guest Editor
Department of Environmental Science and Engineering, Northwest University, Xi'an, China
Interests: soil science; soil aggregate stability, soil carbon and nitrogen cycle; soil microbial carbon sequestration

Special Issue Information

Dear Colleagues,

Microbes, the most diverse organisms on earth, play a pivotal role in terrestrial ecosystems by influencing essential processes such as litter decomposition, nutrient cycling, biodiversity maintenance, soil fertility, and climate regulation. Understanding the microbial mechanisms involved in soil carbon and nutrient cycling is crucial for comprehending ecosystem dynamics and their feedback to the climate system. This Special Issue aims to address the following key questions:

  1. How do soil microbes influence specific aspects of carbon and nutrient cycling processes?
  2. What factors govern the resilience and adaptation of microbial community structures in response to environmental changes?
  3. How do microbial functional traits related to carbon and nutrient cycling operate at the ecosystem level?
  4. How do microbial processes vary temporally and spatially across different terrestrial landscapes?

Prof. Dr. Fazhu Zhao
Guest Editor

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Keywords

  • soil microbes
  • biogeochemical cycling
  • climate change

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Published Papers (1 paper)

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Research

12 pages, 2238 KiB  
Article
Antarctic Soils Select Copiotroph-Dominated Bacteria
by Lujie Zhang, Xue Zhao, Jieying Wang, Liyuan He, Chengjie Ren, Jun Wang, Yaoxin Guo, Ninglian Wang and Fazhu Zhao
Microorganisms 2024, 12(8), 1689; https://doi.org/10.3390/microorganisms12081689 - 16 Aug 2024
Viewed by 258
Abstract
The life strategies of bacterial communities determine their structure and function and are an important driver of biogeochemical cycling. However, the variations in these strategies under different soil resource conditions remain largely unknown. We explored the bacterial life strategies and changes in structure [...] Read more.
The life strategies of bacterial communities determine their structure and function and are an important driver of biogeochemical cycling. However, the variations in these strategies under different soil resource conditions remain largely unknown. We explored the bacterial life strategies and changes in structure and functions between Antarctic soils and forest (temperate, subtropical, and tropical) soils. The results showed that the weighted mean rRNA operon copy number in temperate soils was 19.5% lower than that in Antarctic soils, whereas no significant differences were observed among Antarctic, subtropical, and tropical soils. An unexpected result was that bacterial communities in Antarctic soils tended to be copiotrophs, such as Actinobacteriota and Bacteroidota, whereas those in temperate soils tended to be oligotrophs, such as Acidobacteriota and Chloroflexi. Functional predictions showed that in comparison to copiotrophs in Antarctic soils, temperate-inhabiting oligotrophic bacteria exhibited an 84.2–91.1% lower abundance of labile C decomposition genes (hemicellulose, cellulose, monosaccharides, and disaccharides), whereas a 74.4% higher abundance of stable C decomposition (lignin). Genes involved in N cycling (nitrogen fixation, assimilatory nitrate reduction, and denitrification) were 24.3–64.4% lower in temperate soils than in Antarctic soils. Collectively, our study provides a framework for describing the life strategies of soil bacteria, which are crucial to global biogeochemical cycles. Full article
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