Soil organic carbon accumulation and microbial carbon use efficiency in subalpine coniferous forest as influenced by forest floor vegetative communities | |
Xiong, Jia4,5,6; Wang, Genxu5; Richter, Andreas3; Deluca, Thomas H.2; Zhang, Wei1; Sun, Hailong5; Hu, Zhaoyong5; Sun, Xiangyang5; Sun, Shouqin5 | |
刊名 | GEODERMA |
2023-10-01 | |
卷号 | 438页码:12 |
关键词 | Microbial metabolism Microbial biomass turnover PLFA Understory communities Vascular and nonvascular plants |
ISSN号 | 0016-7061 |
DOI | 10.1016/j.geoderma.2023.116648 |
英文摘要 | The importance of forest floor plants (herbs and mosses) and understory communities on soil C dynamics has been grossly understudied in forest ecosystems; however, there is currently very little knowledge on the impact of forest floor vegetation composition on soil organic C (SOC) accumulation and the microbial metabolic processes. To bridge this gap of knowledge, a forest floor vegetation-removal experiment involving nonvascular mosses (Pleurozium schreberi (PS); Rhizomnium tuomikoskii (RT); and Hylocomiastrum pyrenaicum (HP)) and vascular sedges (Carex sp., CS) was conducted in a subalpine coniferous forest on the eastern edge of Tibetan Plateau, to investigate the associations of different forest floor vegetation communities with mineral soil C accumulation and microbial physiology (C use efficiency (CUE) and microbial biomass turnover). Soils beneath the forest floor vegetative communities differed in soil C and nitrogen (N) concentrations and had distinctively different microbial community structure and physiology. Compared to bare soils, sedge soils had significantly greater SOC and dissolved organic C (DOC) accumulation, greater microbial DNA, biomass C and phospholipid fatty acids (PLFAs) concentrations, and higher microbial CUE and shorter microbial biomass turnover time. While effects of mosses differed among species, P. schreberi had similar effects as sedges, but the effects of H. pyrenaicum and R. tuomikoskii were minimal. Relative to bare soil, P. schreberi and Carex sp. soils were 61.5% and 51.6% higher in microbial CUE and had an obviously shorter microbial biomass turnover time. Variations in the level of DOC and PLFAs (rather than their portion relative to SOC) were the most important regulators of microbial CUE and biomass turnover rate in soils with different forest floor vegetation covers. These results highlight how differences in soil organic matter quality that are directly related to the forest floor vegetation community influence the microbial CUE and biomass turnover and the long-term soil C dynamics. |
资助项目 | National Natural Science Foundation of China[42330508] ; National Natural Science Foundation of China[42273081] ; National Natural Science Foundation of China[41861134039] |
WOS关键词 | BLACK SPRUCE FOREST ; DECOMPOSITION RATES ; EXTRACTION METHOD ; LAND-USE ; BIOMASS ; BACTERIAL ; GROWTH ; TEMPERATURE ; LITTER ; SEQUESTRATION |
WOS研究方向 | Agriculture |
语种 | 英语 |
出版者 | ELSEVIER |
WOS记录号 | WOS:001067917300001 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/57599] |
专题 | 中国科学院水利部成都山地灾害与环境研究所 |
通讯作者 | Sun, Shouqin |
作者单位 | 1.Yibin Univ, Yibin 644000, Sihcuan, Peoples R China 2.Oregon State Univ, Coll Forestry, Corvallis, OR 97331 USA 3.Univ Vienna, Dept Microbiol & Ecosyst Sci, Div Terr Ecosyst Res, Vienna, Austria 4.Univ Chinese Acad Sci, Beijing 10049, Peoples R China 5.Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China 6.Chinese Acad Sci, Inst Mt Hazards & Environm, 9 Block 4,South Renmin Rd, Chengdu 610041, Peoples R China |
推荐引用方式 GB/T 7714 | Xiong, Jia,Wang, Genxu,Richter, Andreas,et al. Soil organic carbon accumulation and microbial carbon use efficiency in subalpine coniferous forest as influenced by forest floor vegetative communities[J]. GEODERMA,2023,438:12. |
APA | Xiong, Jia.,Wang, Genxu.,Richter, Andreas.,Deluca, Thomas H..,Zhang, Wei.,...&Sun, Shouqin.(2023).Soil organic carbon accumulation and microbial carbon use efficiency in subalpine coniferous forest as influenced by forest floor vegetative communities.GEODERMA,438,12. |
MLA | Xiong, Jia,et al."Soil organic carbon accumulation and microbial carbon use efficiency in subalpine coniferous forest as influenced by forest floor vegetative communities".GEODERMA 438(2023):12. |
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