globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2014084117
论文题名:
Rhizosphere activity in an old-growth forest reacts rapidly to changes in soil moisture and shapes whole-tree carbon allocation
作者: Joseph J.; Gao D.; Backes B.; Bloch C.; Brunner I.; Gleixner G.; Haeni M.; Hartmann H.; Hoch G.; Hug C.; Kahmen A.; Lehmann M.M.; Li M.-H.; Luster J.; Peter M.; Poll C.; Rigling A.; Rissanen K.A.; Ruehr N.K.; Saurer M.; Schaub M.; Schönbeck L.; Stern B.; Thomas F.M.; Werner R.A.; Werner W.; Wohlgemuth T.; Hagedorn F.; Gessler A.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:40
起始页码: 24885
结束页码: 24892
语种: 英语
英文关键词: 13C pulse labeling ; Drought ; Drought release ; Sink control
Scopus关键词: carbon ; water ; chemistry ; climate change ; drought ; ecosystem ; forest ; growth, development and aging ; metabolism ; plant leaf ; plant root ; rhizosphere ; Scots pine ; soil ; tree ; Carbon ; Climate Change ; Droughts ; Ecosystem ; Forests ; Pinus sylvestris ; Plant Leaves ; Plant Roots ; Rhizosphere ; Soil ; Trees ; Water
英文摘要: Drought alters carbon (C) allocation within trees, thereby impairing tree growth. Recovery of root and leaf functioning and prioritized C supply to sink tissues after drought may compensate for droughtinduced reduction of assimilation and growth. It remains unclear if C allocation to sink tissues during and following drought is controlled by altered sink metabolic activities or by the availability of new assimilates. Understanding such mechanisms is required to predict forests' resilience to a changing climate.We investigated the impact of drought and drought release on C allocation in a 100-y-old Scots pine forest. We applied 13CO2 pulse labeling to naturally dry control and long-term irrigated trees and tracked the fate of the label in above- and belowground C pools and fluxes. Allocation of new assimilates belowground was ca. 53% lower under nonirrigated conditions. A short rainfall event, which led to a temporary increase in the soil water content (SWC) in the topsoil, strongly increased the amounts of C transported belowground in the nonirrigated plots to values comparable to those in the irrigated plots. This switch in allocation patterns was congruent with a tipping point at around 15% SWC in the response of the respiratory activity of soil microbes. These results indicate that the metabolic sink activity in the rhizosphere and its modulation by soil moisture can drive C allocation within adult trees and ecosystems. Even a subtle increase in soil moisture can lead to a rapid recovery of belowground functions that in turn affects the direction of C transport in trees. © 2020 National Academy of Sciences. All rights reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164011
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Joseph, J., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Gao, D., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China; Backes, B., Geobotany, University of Trier, Trier, 54296, Germany; Bloch, C., Physiological Plant Ecology, University of Basel, Basel, 4056, Switzerland; Brunner, I., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Gleixner, G., Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Haeni, M., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Hartmann, H., Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, 07745, Germany; Hoch, G., Physiological Plant Ecology, University of Basel, Basel, 4056, Switzerland; Hug, C., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Kahmen, A., Physiological Plant Ecology, University of Basel, Basel, 4056, Switzerland; Lehmann, M.M., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Li, M.-H., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China; Luster, J., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Peter, M., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Poll, C., Soil Biology, University of Hohenheim, Stuttgart, 70599, Germany; Rigling, A., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland, Terrestrial Ecosystems, ETH Zurich, Zurich, 8092, Switzerland; Rissanen, K.A., Forest Sciences, University of Helsinki, Helsinki, 00100, Finland; Ruehr, N.K., Plant Ecophysiology, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, 82467, Germany; Saurer, M., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Schaub, M., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Schönbeck, L., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Stern, B., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Thomas, F.M., Geobotany, University of Trier, Trier, 54296, Germany; Werner, R.A., Agricultural Sciences, ETH Zurich, Zurich, 8092, Switzerland; Werner, W., Geobotany, University of Trier, Trier, 54296, Germany; Wohlgemuth, T., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Hagedorn, F., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland; Gessler, A., Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, 8903, Switzerland, Terrestrial Ecosystems, ETH Zurich, Zurich, 8092, Switzerland

Recommended Citation:
Joseph J.,Gao D.,Backes B.,et al. Rhizosphere activity in an old-growth forest reacts rapidly to changes in soil moisture and shapes whole-tree carbon allocation[J]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(40)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Joseph J.]'s Articles
[Gao D.]'s Articles
[Backes B.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Joseph J.]'s Articles
[Gao D.]'s Articles
[Backes B.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Joseph J.]‘s Articles
[Gao D.]‘s Articles
[Backes B.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.