globalchange  > 气候变化与战略
DOI: 10.1016/j.soilbio.2020.107733
Forest canopy maintains the soil community composition under elevated nitrogen deposition
Author: Liu T.; Mao P.; Shi L.; Eisenhauer N.; Liu S.; Wang X.; He X.; Wang Z.; Zhang W.; Liu Z.; Zhou L.; Shao Y.; Fu S.
Source Publication: Soil Biology and Biochemistry
ISSN: 380717
Publishing Year: 2020
Volume: 143
Language: 英语
Keyword: Atmospheric nitrogen ; Global change ; Soil biodiversity ; Soil fauna ; Soil food web
Scopus Keyword: Animals ; Biodiversity ; Ecosystems ; Nitrogen ; Soils ; Atmospheric nitrogen ; Global change ; Soil biodiversity ; Soil fauna ; Soil food web ; Forestry ; abundance ; biodiversity ; biomass ; community composition ; fine root ; forest canopy ; nematode ; nitrogen ; soil ecosystem ; soil fauna ; understory
English Abstract: As an important agent of environmental change, atmospheric nitrogen (N) deposition could have profound effects on terrestrial ecosystems. However, previous studies simulating N deposition in forest ecosystems were mostly based on understory manipulations, often neglecting canopy processes (e.g., N retention). Here, we employed a novel field experiment simulating N deposition through the canopy addition of N (CAN), and explored how soil nematode communities change in response to elevated N deposition in comparison with the conventional approach of understory addition of N (UAN), at two levels of N concentration. We found that 52% and 44% of the N added to the forest canopy at two N concentration levels were retained by the forest canopy. The soil nematode community showed contrasting responses to different approaches of N addition. The conventional UAN approach decreased the abundance of most nematode trophic groups and community diversity compared with CAN approach. This detrimental effect was probably due to changes in fine root biomass and/or nematode community composition caused by the high concentration of N directly entering the soils without the canopy N retention process. Our results suggest that the conventional UAN approach might result in an incomplete and potentially misleading understanding of the effects of N deposition on forest ecosystems. The results show that previous studies might have overestimated the negative effects of N deposition on forest ecosystems by overlooking forest canopy processes. In conclusion, forest canopy N-interceptions contribute to maintaining the composition of soil communities and soil biodiversity under elevated N deposition. Our study helps reconcile some of the discrepancies in the existing literature, and demonstrate the urgent need to consider canopy processes in future N deposition studies. © 2020 Elsevier Ltd
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被引频次[WOS]:3   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候变化与战略

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Affiliation: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Chinese Academy of Sciences, South China Botanical Garden, Guangzhou, 510650, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, College of Environment and Planning, Henan University, Kaifeng, 475004, China; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany; Institute of Biology, Leipzig University, Deutscher Platz 5e, Leipzig, 04103, Germany; Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, Yunnan, 666303, China; State Key Laboratory of Plateau Ecology and Agriculture, Qinghai Academy of Animal and Veterinary Sciences, Qinghai University, Xining, 810016, China; Institute for Environmental Research and Education, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China

Recommended Citation:
Liu T.,Mao P.,Shi L.,et al. Forest canopy maintains the soil community composition under elevated nitrogen deposition[J]. Soil Biology and Biochemistry,2020-01-01,143
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