An integrated belowground trait-based understanding of nitrogen-driven plant diversity loss

An integrated belowground trait-based understanding of nitrogen-driven plant diversity loss

© 2022 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 28(2022), 11 vom: 25. Juni, Seite 3651-3664
1. Verfasser: Tian, Qiuying (VerfasserIn)
Weitere Verfasser: Lu, Peng, Zhai, Xiufeng, Zhang, Ruifang, Zheng, Yao, Wang, Hong, Nie, Bao, Bai, Wenming, Niu, Shuli, Shi, Peili, Yang, Yuanhe, Li, Kaihui, Yang, Dianlin, Stevens, Carly, Lambers, Hans, Zhang, Wen-Hao
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2022
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article N deposition belowground trait competitive exclusion environmental tolerance grassland ecosystem plant diversity loss rhizosphere microhabitat Soil Nitrogen N762921K75
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520 |a Belowground plant traits play important roles in plant diversity loss driven by atmospheric nitrogen (N) deposition. However, the way N enrichment shapes plant microhabitats by patterning belowground traits and finally determines aboveground responses is poorly understood. Here, we investigated the rhizosheath trait of 74 plant species in seven N-addition simulation experiments across multiple grassland ecosystems in China. We found that rhizosheath formation differed among plant functional groups and contributed to changes in plant community composition induced by N enrichment. Compared with forb species, grass and sedge species exhibited distinct rhizosheaths; moreover, grasses and sedges expanded their rhizosheaths with increasing N-addition rate which allowed them to colonize belowground habitats. Grasses also shaped a different microenvironment around their roots compared with forbs by affecting the physicochemical, biological, and stress-avoiding properties of their rhizosphere soil. Rhizosheaths act as a "biofilm-like shield" by the accumulation of protective compounds, carboxylic anions and polysaccharides, determined by both plants and microorganisms. This enhanced the tolerance of grasses and sedges to stresses induced by N enrichment. Conversely, forbs lacked the protective rhizosheaths which renders their roots sensitive to stresses induced by N enrichment, thus contributing to their disappearance under N-enriched conditions. This study uncovers the processes by which belowground facilitation and trait matching affect aboveground responses under conditions of N enrichment, which advances our mechanistic understanding of the contribution of competitive exclusion and environmental tolerance to plant diversity loss caused by N deposition 
650 4 |a Journal Article 
650 4 |a N deposition 
650 4 |a belowground trait 
650 4 |a competitive exclusion 
650 4 |a environmental tolerance 
650 4 |a grassland ecosystem 
650 4 |a plant diversity loss 
650 4 |a rhizosphere microhabitat 
650 7 |a Soil  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
650 7 |a N762921K75  |2 NLM 
700 1 |a Lu, Peng  |e verfasserin  |4 aut 
700 1 |a Zhai, Xiufeng  |e verfasserin  |4 aut 
700 1 |a Zhang, Ruifang  |e verfasserin  |4 aut 
700 1 |a Zheng, Yao  |e verfasserin  |4 aut 
700 1 |a Wang, Hong  |e verfasserin  |4 aut 
700 1 |a Nie, Bao  |e verfasserin  |4 aut 
700 1 |a Bai, Wenming  |e verfasserin  |4 aut 
700 1 |a Niu, Shuli  |e verfasserin  |4 aut 
700 1 |a Shi, Peili  |e verfasserin  |4 aut 
700 1 |a Yang, Yuanhe  |e verfasserin  |4 aut 
700 1 |a Li, Kaihui  |e verfasserin  |4 aut 
700 1 |a Yang, Dianlin  |e verfasserin  |4 aut 
700 1 |a Stevens, Carly  |e verfasserin  |4 aut 
700 1 |a Lambers, Hans  |e verfasserin  |4 aut 
700 1 |a Zhang, Wen-Hao  |e verfasserin  |4 aut 
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773 1 8 |g volume:28  |g year:2022  |g number:11  |g day:25  |g month:06  |g pages:3651-3664 
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