Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns
The Tibetan Plateau is an essential area to study the potential feedback effects of soils to climate change due to the rapid rise in its air temperature in the past several decades and the large amounts of soil organic carbon (SOC) stocks, particularly in the permafrost. Yet it is one of the most un...
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ftchinacascnwipb:oai:210.75.249.4:363003/57223 2023-05-15T17:58:22+02:00 Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns Geng, Yan Wang, Yonghui Yang, Kuo Wang, Shaopeng Zeng, Hui Baumann, Frank Kuehn, Peter Scholten, Thomas He, Jin-Sheng 2012-04-11 http://210.75.249.4/handle/363003/3688 http://210.75.249.4/handle/363003/16503 http://210.75.249.4/handle/363003/21599 http://210.75.249.4/handle/363003/26695 http://210.75.249.4/handle/363003/31791 http://210.75.249.4/handle/363003/36887 http://210.75.249.4/handle/363003/41983 http://210.75.249.4/handle/363003/47063 http://210.75.249.4/handle/363003/52143 http://210.75.249.4/handle/363003/57223 unknown PLOS ONE Li, GL; Song, CH; You, JM; Zhang, XL; Chen, G.Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns,PLOS ONE,2012,7(4): http://210.75.249.4/handle/363003/3688 http://210.75.249.4/handle/363003/16503 http://210.75.249.4/handle/363003/21599 http://210.75.249.4/handle/363003/26695 http://210.75.249.4/handle/363003/31791 http://210.75.249.4/handle/363003/36887 http://210.75.249.4/handle/363003/41983 http://210.75.249.4/handle/363003/47063 http://210.75.249.4/handle/363003/52143 http://210.75.249.4/handle/363003/57223 期刊论文 2012 ftchinacascnwipb 2023-03-26T20:45:01Z The Tibetan Plateau is an essential area to study the potential feedback effects of soils to climate change due to the rapid rise in its air temperature in the past several decades and the large amounts of soil organic carbon (SOC) stocks, particularly in the permafrost. Yet it is one of the most under-investigated regions in soil respiration (Rs) studies. Here, Rs rates were measured at 42 sites in alpine grasslands (including alpine steppes and meadows) along a transect across the Tibetan Plateau during the peak growing season of 2006 and 2007 in order to test whether: (1) belowground biomass (BGB) is most closely related to spatial variation in Rs due to high root biomass density, and (2) soil temperature significantly influences spatial pattern of Rs owing to metabolic limitation from the low temperature in cold, high-altitude ecosystems. The average daily mean Rs of the alpine grasslands at peak growing season was 3.92 mu mol CO2 m(-2) s(-1), ranging from 0.39 to 12.88 mu mol CO2 m(-2) s(-1), with average daily mean Rs of 2.01 and 5.49 mu mol CO2 m(-2) s(-1) for steppes and meadows, respectively. By regression tree analysis, BGB, aboveground biomass (AGB), SOC, soil moisture (SM), and vegetation type were selected out of 15 variables examined, as the factors influencing large-scale variation in Rs. With a structural equation modelling approach, we found only BGB and SM had direct effects on Rs, while other factors indirectly affecting Rs through BGB or SM. Most (80%) of the variation in Rs could be attributed to the difference in BGB among sites. BGB and SM together accounted for the majority (82%) of spatial patterns of Rs. Our results only support the first hypothesis, suggesting that models incorporating BGB and SM can improve Rs estimation at regional scale. The Tibetan Plateau is an essential area to study the potential feedback effects of soils to climate change due to the rapid rise in its air temperature in the past several decades and the large amounts of soil organic carbon (SOC) stocks, ... Report permafrost Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) |
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Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascnwipb |
language |
unknown |
description |
The Tibetan Plateau is an essential area to study the potential feedback effects of soils to climate change due to the rapid rise in its air temperature in the past several decades and the large amounts of soil organic carbon (SOC) stocks, particularly in the permafrost. Yet it is one of the most under-investigated regions in soil respiration (Rs) studies. Here, Rs rates were measured at 42 sites in alpine grasslands (including alpine steppes and meadows) along a transect across the Tibetan Plateau during the peak growing season of 2006 and 2007 in order to test whether: (1) belowground biomass (BGB) is most closely related to spatial variation in Rs due to high root biomass density, and (2) soil temperature significantly influences spatial pattern of Rs owing to metabolic limitation from the low temperature in cold, high-altitude ecosystems. The average daily mean Rs of the alpine grasslands at peak growing season was 3.92 mu mol CO2 m(-2) s(-1), ranging from 0.39 to 12.88 mu mol CO2 m(-2) s(-1), with average daily mean Rs of 2.01 and 5.49 mu mol CO2 m(-2) s(-1) for steppes and meadows, respectively. By regression tree analysis, BGB, aboveground biomass (AGB), SOC, soil moisture (SM), and vegetation type were selected out of 15 variables examined, as the factors influencing large-scale variation in Rs. With a structural equation modelling approach, we found only BGB and SM had direct effects on Rs, while other factors indirectly affecting Rs through BGB or SM. Most (80%) of the variation in Rs could be attributed to the difference in BGB among sites. BGB and SM together accounted for the majority (82%) of spatial patterns of Rs. Our results only support the first hypothesis, suggesting that models incorporating BGB and SM can improve Rs estimation at regional scale. The Tibetan Plateau is an essential area to study the potential feedback effects of soils to climate change due to the rapid rise in its air temperature in the past several decades and the large amounts of soil organic carbon (SOC) stocks, ... |
format |
Report |
author |
Geng, Yan Wang, Yonghui Yang, Kuo Wang, Shaopeng Zeng, Hui Baumann, Frank Kuehn, Peter Scholten, Thomas He, Jin-Sheng |
spellingShingle |
Geng, Yan Wang, Yonghui Yang, Kuo Wang, Shaopeng Zeng, Hui Baumann, Frank Kuehn, Peter Scholten, Thomas He, Jin-Sheng Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
author_facet |
Geng, Yan Wang, Yonghui Yang, Kuo Wang, Shaopeng Zeng, Hui Baumann, Frank Kuehn, Peter Scholten, Thomas He, Jin-Sheng |
author_sort |
Geng, Yan |
title |
Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
title_short |
Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
title_full |
Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
title_fullStr |
Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
title_full_unstemmed |
Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns |
title_sort |
soil respiration in tibetan alpine grasslands: belowground biomass and soil moisture, but not soil temperature, best explain the large-scale patterns |
publishDate |
2012 |
url |
http://210.75.249.4/handle/363003/3688 http://210.75.249.4/handle/363003/16503 http://210.75.249.4/handle/363003/21599 http://210.75.249.4/handle/363003/26695 http://210.75.249.4/handle/363003/31791 http://210.75.249.4/handle/363003/36887 http://210.75.249.4/handle/363003/41983 http://210.75.249.4/handle/363003/47063 http://210.75.249.4/handle/363003/52143 http://210.75.249.4/handle/363003/57223 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
PLOS ONE Li, GL; Song, CH; You, JM; Zhang, XL; Chen, G.Soil Respiration in Tibetan Alpine Grasslands: Belowground Biomass and Soil Moisture, but Not Soil Temperature, Best Explain the Large-Scale Patterns,PLOS ONE,2012,7(4): http://210.75.249.4/handle/363003/3688 http://210.75.249.4/handle/363003/16503 http://210.75.249.4/handle/363003/21599 http://210.75.249.4/handle/363003/26695 http://210.75.249.4/handle/363003/31791 http://210.75.249.4/handle/363003/36887 http://210.75.249.4/handle/363003/41983 http://210.75.249.4/handle/363003/47063 http://210.75.249.4/handle/363003/52143 http://210.75.249.4/handle/363003/57223 |
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1766166955022090240 |