Winter warming rapidly increases carbon degradation capacities of fungal communities in tundra soil: Potential consequences on carbon stability
Abstract
We report high-latitude tundra ecosystems are increasingly affected by climate warming. As an important fraction of soil microorganisms, fungi play essential roles in carbon degradation, especially the old, chemically recalcitrant carbon. However, it remains obscure how fungi respond to climate warming and whether fungi, in turn, affect carbon stability of tundra. In a 2-year winter soil warming experiment of 2°C by snow fences, we investigated responses of fungal communities to warming in the active layer of an Alaskan tundra. Although fungal community composition, revealed by the 28S rRNA gene amplicon sequencing, remained unchanged (p > .05), fungal functional gene composition, revealed by a microarray named GeoChip, was altered (p < .05). Changes in functional gene composition were linked to winter soil temperature, thaw depth, soil moisture, and gross primary productivity (canonical correlation analysis, p < .05). Specifically, relative abundances of fungal genes encoding invertase, xylose reductase and vanillin dehydrogenase significantly increased (p < .05), indicating higher carbon degradation capacities of fungal communities under warming. Accordingly, we detected changes in fungal gene networks under warming, including higher average path distance, lower average clustering coefficient and lower percentage of negative links, indicating that warming potentially changed fungal interactions. Together, our study revealsmore »
- Authors:
-
[1];
- Tsinghua University, Beijing (China)
- University of Oklahoma, Norman, OK (United States); University of California, Berkeley, CA (United States)
- University of Oklahoma, Norman, OK (United States)
- University of Oklahoma, Norman, OK (United States); University of California, San Francisco, CA (United States)
- Northern Arizona University, Flagstaff, AZ (United States)
- Michigan State University, East Lansing, MI (United States)
- Tsinghua University, Beijing (China); University of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Univ. of Oklahoma, Norman, OK (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation of China
- OSTI Identifier:
- 2318682
- Grant/Contract Number:
- SC0004601; SC0010715; AC02-05CH11231; 41877048; 41825016
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Molecular Ecology
- Additional Journal Information:
- Journal Volume: 30; Journal Issue: 4; Journal ID: ISSN 0962-1083
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; Alaskan tundra; carbon degradation; functional gene; network analysis; soil fungal communities; winter warming
Citation Formats
Cheng, Jingmin, Yang, Yunfeng, Yuan, Mengting M., Gao, Qun, Wu, Liyou, Qin, Ziyan, Shi, Zhou J., Schuur, Edward G., Cole, James R., Tiedje, James M., and Zhou, Jizhong. Winter warming rapidly increases carbon degradation capacities of fungal communities in tundra soil: Potential consequences on carbon stability. United States: N. p., 2020.
Web. doi:10.1111/mec.15773.
Cheng, Jingmin, Yang, Yunfeng, Yuan, Mengting M., Gao, Qun, Wu, Liyou, Qin, Ziyan, Shi, Zhou J., Schuur, Edward G., Cole, James R., Tiedje, James M., & Zhou, Jizhong. Winter warming rapidly increases carbon degradation capacities of fungal communities in tundra soil: Potential consequences on carbon stability. United States. https://doi.org/10.1111/mec.15773
Cheng, Jingmin, Yang, Yunfeng, Yuan, Mengting M., Gao, Qun, Wu, Liyou, Qin, Ziyan, Shi, Zhou J., Schuur, Edward G., Cole, James R., Tiedje, James M., and Zhou, Jizhong. Thu .
"Winter warming rapidly increases carbon degradation capacities of fungal communities in tundra soil: Potential consequences on carbon stability". United States. https://doi.org/10.1111/mec.15773. https://www.osti.gov/servlets/purl/2318682.
@article{osti_2318682,
title = {Winter warming rapidly increases carbon degradation capacities of fungal communities in tundra soil: Potential consequences on carbon stability},
author = {Cheng, Jingmin and Yang, Yunfeng and Yuan, Mengting M. and Gao, Qun and Wu, Liyou and Qin, Ziyan and Shi, Zhou J. and Schuur, Edward G. and Cole, James R. and Tiedje, James M. and Zhou, Jizhong},
abstractNote = {We report high-latitude tundra ecosystems are increasingly affected by climate warming. As an important fraction of soil microorganisms, fungi play essential roles in carbon degradation, especially the old, chemically recalcitrant carbon. However, it remains obscure how fungi respond to climate warming and whether fungi, in turn, affect carbon stability of tundra. In a 2-year winter soil warming experiment of 2°C by snow fences, we investigated responses of fungal communities to warming in the active layer of an Alaskan tundra. Although fungal community composition, revealed by the 28S rRNA gene amplicon sequencing, remained unchanged (p > .05), fungal functional gene composition, revealed by a microarray named GeoChip, was altered (p < .05). Changes in functional gene composition were linked to winter soil temperature, thaw depth, soil moisture, and gross primary productivity (canonical correlation analysis, p < .05). Specifically, relative abundances of fungal genes encoding invertase, xylose reductase and vanillin dehydrogenase significantly increased (p < .05), indicating higher carbon degradation capacities of fungal communities under warming. Accordingly, we detected changes in fungal gene networks under warming, including higher average path distance, lower average clustering coefficient and lower percentage of negative links, indicating that warming potentially changed fungal interactions. Together, our study reveals higher carbon degradation capacities of fungal communities under short-term warming and highlights the potential impacts of fungal communities on tundra ecosystem respiration, and consequently future carbon stability of high-latitude tundra.},
doi = {10.1111/mec.15773},
journal = {Molecular Ecology},
number = 4,
volume = 30,
place = {United States},
year = {Thu Dec 10 00:00:00 EST 2020},
month = {Thu Dec 10 00:00:00 EST 2020}
}
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