Climate Change Data Portal
| DOI | 10.1186/s13717-024-00522-8 |
| Seasonal freeze-thaw processes impact microbial communities of soil aggregates associated with soil pores on the Qinghai-Tibet Plateau | |
| 发表日期 | 2024 |
| EISSN | 2192-1709 |
| 起始页码 | 13 |
| 结束页码 | 1 |
| 卷号 | 13期号:1 |
| 英文摘要 | Background Seasonal freeze-thaw (FT) processes alter soil formation and cause changes in soil microbial communities, which regulate the decomposition of organic matter in alpine ecosystems. Soil aggregates are basic structural units and play a critical role in microbial habitation. However, the impact of seasonal FT processes on the distribution of microbial communities associated with soil pores in different aggregate fractions under climate change has been overlooked. In this study, we sampled soil aggregates from two typical alpine ecosystems (alpine meadow and alpine shrubland) during the seasonal FT processes (UFP: unstable freezing period, SFP: stable frozen period, UTP: unstable thawing period and STP: stable thawed period). The phospholipid fatty acid (PLFA) method was used to determine the biomass of living microbes in different aggregate fractions. Results The microbial biomass of 0.25-2 mm and 0.053-0.25 mm aggregates did not change significantly during the seasonal FT process while the microbial biomass of > 2 mm aggregates presented a significant difference between the STP and UTP. Bacterial communities dominated the microbes in aggregates, accounting for over 80% of the total PLFAs. The microbial communities of soil aggregates in the surface layer were more sensitive to the seasonal FT process than those in other soil layers. In the thawing period, Gram positive bacteria (GP) was more dominant. In the freezing period, the ratio of Gram-positive to Gram-negative bacterial PLFAs (GP/GN) was low because the enrichment of plant litter facilitated the formation of organic matter. In the freezing process, pores of 30-80 mu m (mesopores) favored the habitation of fungal and actinobacterial communities while total PLFAs and bacterial PLFAs were negatively correlated with mesopores in the thawing process. Conclusions The freezing process caused a greater variability in microbial biomass of different aggregate fractions. The thawing process increased the differences in microbial biomass among soil horizons. Mesopores of aggregates supported the habitation of actinobacterial and fungal communities while they were not conducive to bacterial growth. These findings provide a further comprehension of biodiversity and accurate estimation of global carbon cycle. |
| 英文关键词 | Phospholipid fatty acid; Seasonal freeze-thaw process; Soil aggregate; Soil microbial biomass; Soil pore |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Ecology ; Environmental Sciences |
| WOS记录号 | WOS:001228169100001 |
| 来源期刊 | ECOLOGICAL PROCESSES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/287814 |
| 作者单位 | Beijing Normal University; Beijing Normal University |
| 推荐引用方式 GB/T 7714 | . Seasonal freeze-thaw processes impact microbial communities of soil aggregates associated with soil pores on the Qinghai-Tibet Plateau[J],2024,13(1). |
| APA | (2024).Seasonal freeze-thaw processes impact microbial communities of soil aggregates associated with soil pores on the Qinghai-Tibet Plateau.ECOLOGICAL PROCESSES,13(1). |
| MLA | "Seasonal freeze-thaw processes impact microbial communities of soil aggregates associated with soil pores on the Qinghai-Tibet Plateau".ECOLOGICAL PROCESSES 13.1(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
