Initial soil responses to experimental warming in two contrasting forest ecosystems, Eastern Tibetan Plateau, China: Nutrient availabilities, microbial properties and enzyme activities

Xu, Zhenfeng; Hu, Renzhi; Xiong, Pan; Wan, Chuan; Cao, Gang; Liu, Qing

doi:10.1016/j.apsoil.2010.07.005

Cited by 85 publications

(59 citation statements)

References 41 publications

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“…In our study, MBC, MBN and MBC/MBN ratio were not sensitive to warming irrespective of tree species and sampling date. The lack of a marked warming effect on soil microbial biomass was consistent with the studies conducted in arctic tundra, tallgrass prairie and subalpine forest (Zhang et al, 2005;Biasi et al, 2008;Xu et al, 2010). The effects of warming on soil microbial biomass, however, varied among studies.…”

Section: Soil Properties Monthssupporting

confidence: 76%

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Effects of experimental warming on soil N transformations of two coniferous species, Eastern Tibetan Plateau, China

Yin

Chen

Liu

2012

Soil Biology and Biochemistry

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Section: Soil Properties Monthssupporting

confidence: 76%

“…Microbes play critical roles in C and nutrient transformation in forest soils, and slight changes in the microbial biomass or community structure may affect soil C and N cycling (Xu et al, 2010). Therefore, soil microbial properties have been proposed to be the potential indicators of impacts of global warming on soils.…”

Section: Soil Properties Monthsmentioning

confidence: 99%

Effects of experimental warming on soil N transformations of two coniferous species, Eastern Tibetan Plateau, China

Yin

Chen

Liu

2012

Soil Biology and Biochemistry

Self Cite

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“…The increases in the plant root respiration and soil microbial respiration likely resulted in the increase in the R s , whereas the increase in the soil microbial respiration likely caused a decrease in the organic matter in soil (Lu et al, 2013a;Yan et al, 2011). In addition, decreases in soil carbon and nitrogen storage may also result from an increase in soil enzyme activity and a decrease in litter quantity due to climatic warming (Liu et al, 2011a;Pan et al, 2008;Xu et al, 2010a). However, neither the soil carbon nor nitrogen pools were significantly affected by the warming (Fig.…”

Section: Soil C and N Poolsmentioning

confidence: 99%

“…The warming amplitude increases with increasing altitude on this Plateau (Liu and Chen 2000;Yao et al, 2000). Field experiments have analysed the potential effects of warming on the alpine soils on the Tibetan Plateau (Fu et al, 2012;Li et al, 2011;Rui et al, 2011;Xu et al, 2010a;Yu et al, 2014). However, a synthesis of the experimental warming data is still unavailable and thus, the general tendency of the warming effects remains unclear for alpine soils across this Plateau.…”

Section: Introductionmentioning

confidence: 99%

A meta-analysis of the effects of experimental warming on soil carbon and nitrogen dynamics on the Tibetan Plateau

Zhang

Shen

2015

Applied Soil Ecology

118

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A B S T R A C TAlpine ecosystems at high altitudes and latitudes are notably sensitive to climatic warming and the Tibetan Plateau is a widely distributed alpine ecosystem. The magnitude of climatic warming on the Tibetan Plateau is expected to be considerably greater than the global average. However, a synthesis of the experimental warming soil carbon and nitrogen data is still lacking and whether forest soils are more sensitive to warming than grassland soils remains unclear. In this study, we used a meta-analysis approach to synthesise 196 observations from 25 published studies on the Tibetan Plateau. Warming significantly increased microbial biomass carbon (MBC) by 14.3% (95% CI: 2.9-24.6%), microbial biomass nitrogen (MBN) by 20.1% (95% CI: 2.0-45.1%), net nitrogen mineralization by 49.2% (95% CI: 38.1-62.3%) and net nitrification by 56.0% (95% CI: 51.4-66.1%), but did not significantly affect soil carbon (95% CI: À13.9 to 2.7%) or nitrogen (95% CI: À12.4 to 2.6%). The mean annual air temperature was negatively correlated with the warming effects on MBC and MBN. Grasslands exhibited significant MBC and MBN responses to warming. Specifically, soil microbial biomass was more responsive to warming in colder environments. Moreover, forest soils are not always more sensitive to warming than grassland soils as previous studies have suggested. These findings indicate that clarifying the effect of warming on alpine soils need consider ecosystem types and their local climate.

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“…The levels of extractable organic C and N were determined by a liquiTOC II analyzer (Elementar Co., Hanau, Germany) and by potassium persulfate (K 2 S 2 O 8 ) oxidation as measured by a UV-1700 PharmaSpec UV-Vis spectrophotometer (Shimadzu, Kyoto, Japan), respectively. The extractable C and N were converted to SMC and SMN using conversion coefficients of 0.45 (Fu et al 2012;Xu et al 2010). …”

Section: Soil Sampling and Laboratory Analysismentioning

confidence: 99%

Nitrogen Critical Loads for an Alpine Meadow Ecosystem on the Tibetan Plateau

Zong

Shi

Song

et al. 2015

Environmental Management

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Increasing atmospheric nitrogen (N) deposition has the potential to alter plant diversity and thus the function and stability of terrestrial ecosystems. N-limited alpine ecosystems are expected to be particularly susceptible to increasing N deposition. However, little is known about the critical loads and saturation thresholds of ecosystem responses to increasing N deposition on the Tibetan Plateau, despite its importance to ecosystem management. To evaluate the N critical loads and N saturation thresholds in an alpine ecosystem, in 2010, we treated an alpine meadow with five levels of N addition (0, 10, 20, 40, and 80 kg N ha -1 year -1 ) and characterized plant and soil responses. The results showed that plant species richness and diversity index did not statistically vary with N addition treatments, but they both changed with years. N addition affected plant cover and aboveground productivity, especially for grasses, and soil chemical features. The N critical loads and saturation thresholds, in terms of plant cover and biomass change at the community level, were 8.8-12.7 and 50 kg N ha -1 -year -1 (including the ambient N deposition rate), respectively. However, pronounced changes in soil inorganic N and net N mineralization occurred under the 20 and 40 kg N ha -1 year -1 treatments. Our results indicate that plant community cover and biomass are more sensitive than soil to increasing N inputs. The plant community composition in alpine ecosystems on the Qinghai-Tibetan Plateau may change under increasing N deposition in the future.

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Initial soil responses to experimental warming in two contrasting forest ecosystems, Eastern Tibetan Plateau, China: Nutrient availabilities, microbial properties and enzyme activities

Cited by 85 publications

References 41 publications

Effects of experimental warming on soil N transformations of two coniferous species, Eastern Tibetan Plateau, China

Effects of experimental warming on soil N transformations of two coniferous species, Eastern Tibetan Plateau, China

A meta-analysis of the effects of experimental warming on soil carbon and nitrogen dynamics on the Tibetan Plateau

Nitrogen Critical Loads for an Alpine Meadow Ecosystem on the Tibetan Plateau

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