Changes in Temperature Sensitivity and Activation Energy of Soil Organic Matter Decomposition in Different Qinghai-Tibet Plateau Grasslands
Li, J; He, NP; Wei, XH; Gao, Y; Zuo, Y
2015
Source PublicationPLOS ONE
ISSN1932-6203
Volume10Issue:7Pages:-
AbstractQinghai-Tibet Plateau grasslands are unique geographical regions and store substantial soil organic matter (SOM) in the soil surface, which make them very sensitive to global climate change. Here, we focused on three main grassland types (alpine meadow, steppe, and desert) and conducted a soil incubation experiment at five different temperatures (5, 10, 15, 20, and 25 degrees C) to investigate SOM decomposition rates (R), temperature sensitivity (Q(10)), and activation energy (E-a). The results showed that grassland type and incubation temperature had significant impact on R (P < 0.001), and the values of R were exponential correlated with incubation temperature in three alpine grasslands. At the same temperature, R was in the following order: alpine meadow > alpinesteppe > alpine desert. The Q(10) values differed significantly among different grasslands, and the overall trends were as follows: alpine meadow (1.56 +/- 0.09) < alpine steppe (1.88 +/- 0.23) < alpine desert (2.39 +/- 0.32). Moreover, the E-a values differed significantly across different grassland types (P < 0.001) and increased with increasing incubation time. The exponential negative correlations between E-a and R at 20 degrees C across all grassland types (all Ps < 0.001) indicated that the substrate-quality temperature hypothesis is applicable to the alpine grasslands. Our findings provide new insights for understanding the responses of SOM decomposition and storage to warming scenarios in this Plateau.
SubtypeJournal
Subject AreaScience & Technology - Other Topics
WOS Subject ExtendedMultidisciplinary Sciences
WOS KeywordCARBON DECOMPOSITION ; MICROBIAL BIOMASS ; CO2 PRODUCTION ; RESPIRATION ; QUALITY ; NITROGEN ; CLIMATE ; DEPENDENCE ; FEEDBACKS ; RESPONSES
Indexed BySCI
Language英语
WOS IDWOS:000358197600158
PublisherPUBLIC LIBRARY SCIENCE
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44393
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Li, J,He, NP,Wei, XH,et al. Changes in Temperature Sensitivity and Activation Energy of Soil Organic Matter Decomposition in Different Qinghai-Tibet Plateau Grasslands[J]. PLOS ONE,2015,10(7):-.
APA Li, J,He, NP,Wei, XH,Gao, Y,&Zuo, Y.(2015).Changes in Temperature Sensitivity and Activation Energy of Soil Organic Matter Decomposition in Different Qinghai-Tibet Plateau Grasslands.PLOS ONE,10(7),-.
MLA Li, J,et al."Changes in Temperature Sensitivity and Activation Energy of Soil Organic Matter Decomposition in Different Qinghai-Tibet Plateau Grasslands".PLOS ONE 10.7(2015):-.
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