Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13803 |
Warmer winters increase the rhizosphere carbon flow to mycorrhizal fungi more than to other microorganisms in a temperate grassland | |
Birgander, Johanna1; Rousk, Johannes2; Olsson, Pal Axel1 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Sweden |
英文摘要 | A decisive set of steps in the terrestrial carbon (C) cycle is the fixation of atmospheric C by plants and the subsequent C-transfer to rhizosphere microorganisms. With climate change winters are expected to become milder in temperate ecosystems. Although the rate and pathways of rhizosphere C input to soil could be impacted by milder winters, the responses remain unknown. To address this knowledge-gap, a winter-warming experiment was established in a seminatural temperate grassland to follow the C flow from atmosphere, via the plants, to different groups of soil microorganisms. In situ (CO2)-C-13 pulse labelling was used to track C into signature fatty acids of microorganisms. The winter warming did not result in any changes in biomass of any of the groups of microorganisms. However, the C flow from plants to arbuscular mycorrhizal (AM) fungi, increased substantially by winter warming. Saprotrophic fungi also received large amounts of plant-derived Cindicating a higher importance for the turnover of rhizosphere C than biomass estimates would suggeststill, this C flow was unaffected by winter warming. AM fungi was the only microbial group positively affected by winter warmingthe group with the closest connection to plants. Winter warming resulted in higher plant productivity earlier in the season, and this aboveground change likely induced plant nutrient limitation in warmed plots, thus stimulating the plant dependence on, and C allocation to, belowground nutrient acquisition. The preferential C allocation to AM fungi was at the expense of C flow to other microbial groups, which were unaffected by warming. Our findings imply that warmer winters may shift rhizosphere C-fluxes to become more AM fungal-dominated. Surprisingly, the stimulated rhizosphere C flow was matched by increased microbial turnover, leading to no accumulation of soil microbial biomass. |
英文关键词 | aboveground-belowground
arbuscular mycorrhizal fungi (AMF)
climate change
NLFA
plant |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000035 |
WOS关键词 | SOIL FOOD WEBS ; CLIMATE-CHANGE ; MICROBIAL COMMUNITY ; ORGANIC-MATTER ; FATTY-ACIDS ; PLANT ; BIOMASS ; ALLOCATION ; DIVERSITY ; BACTERIAL |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17419 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Lund Univ, Dept Biol & Biodivers, Lund, Sweden; 2.Lund Univ, Dept Biol & Microbial Ecol, Lund, Sweden |
推荐引用方式 GB/T 7714 | Birgander, Johanna,Rousk, Johannes,Olsson, Pal Axel. Warmer winters increase the rhizosphere carbon flow to mycorrhizal fungi more than to other microorganisms in a temperate grassland[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Birgander, Johanna,Rousk, Johannes,&Olsson, Pal Axel.(2017).Warmer winters increase the rhizosphere carbon flow to mycorrhizal fungi more than to other microorganisms in a temperate grassland.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Birgander, Johanna,et al."Warmer winters increase the rhizosphere carbon flow to mycorrhizal fungi more than to other microorganisms in a temperate grassland".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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