Dynamics of above- and below-ground biomass and C, N, P accumulation in the alpine steppe of Northern Tibet

Lü, Xianguo; Yan, Yan; Fan, Jihui; Cao, Yong; Wang, Xiaodan

doi:10.1007/s11629-011-2182-8

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…The soil pH was measured using a PH 3000 (Steps, Germany). The soil organic carbon (SOC) was determined using wet oxidation by K 2 Cr 2 O 7 -H 2 SO 4 [23]. The soil samples were digested using a sulfuric acid-hydrogen peroxide digestion procedure, after which a FLOWSYS III system (Flowsys, Systea, Itally) was employed to measure the total N and P. The soil particle size fractions were determined using a laser diffraction instrument (Malvern Mastersizer 2000 particle size analyzer, Worcs, UK), which is the classification used by the U. S. Department of Agriculture (USDA).…”

Section: Soil Analysismentioning

confidence: 99%

Differences in species diversity, biomass, and soil properties of five types of alpine grasslands in the Northern Tibetan Plateau

et al. 2020

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Approximately 94% of the land area of the Northern Tibetan Plateau is covered by grasslands, which comprise one of five key livestock producing regions in China. In contrast to most other regions worldwide, these alpine grasslands are much more sensitive to global climate change, thus they are under intense study. The differences in species diversity, plant biomass, and soil properties of five representative's alpine grassland types in the Northern Tibetan Plateau were investigated in this research. The results revealed that 11 community types were identified according to the importance of dominant species and constructive species.

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Section: Soil Analysismentioning

confidence: 99%

Differences in species diversity, biomass, and soil properties of five types of alpine grasslands in the Northern Tibetan Plateau

et al. 2020

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“…Climate and soil fertility are key drivers of ecosystem processes at the regional scale. Projected changes in environmental factors will have a large influence on plant C and N stoichiometry in natural ecosystems (Lu, Yan, Fan, Cao, & Wang, ; Luo et al., ; Sardans, Rivas‐Ubach, & Peñuelas, ; Yuan & Chen, ). Therefore, understanding the sensitivity of the relative internal concentrations of C and N in individual primary producers and in communities to global environment changes is a high priority.…”

Section: Introductionmentioning

confidence: 99%

Carbon and nitrogen allocation shifts in plants and soils along aridity and fertility gradients in grasslands of China

Luo

Sardans

et al. 2017

Ecology and Evolution

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Plant carbon (C) and nitrogen (N) stoichiometry play an important role in the maintenance of ecosystem structure and function. To decipher the influence of changing environment on plant C and N stoichiometry at the subcontinental scale, we studied the shoot and root C and N stoichiometry in two widely distributed and dominant genera along a 2,200‐km climatic gradient in China's grasslands. Relationships between C and N concentrations and soil climatic variables factors were studied. In contrast to previous theory, plant C concentration and C:N ratios in both shoots and roots increased with increasing soil fertility and decreased with increasing aridity. Relative N allocation shifted from soils to plants and from roots to shoots with increasing aridity. Changes in the C:N ratio were associated with changes in N concentration. Dynamics of plant C concentration and C:N ratios were mainly caused by biomass reallocation and a nutrient dilution effect in the plant‐soil system. Our results suggest that the shifted allocation of C and N to different ecosystem compartments under a changing environment may change the overall use of these elements by the plant‐soil system.

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“…The spatial pattern of biomass is considered to depend largely on meteorological conditions, topographic variables, and soil characteristics. For instance, biomass spatial patterns have been shown to be severely affected by environmental variables, including meteorological factors (Ma et al, 2010a;Yang et al, 2009;Zhang et al, 2010), soil properties (Yang et al, 2009b;Lu et al, 2011;Gerdol et al, 2004), and topographical factors (Bruun et al, 2006;Luo et al, 2004;Litaor et al, 2008;Fisk et al, 1998). Many studies have examined the relationship between AGB distribution and environmental factors.…”

Section: Introductionmentioning

confidence: 99%

Meta-analysis of relationships between environmental factors and aboveground biomass in the alpine grassland on the Tibetan Plateau

2013

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The Tibetan Plateau, known as the "world's third pole" for its extremely harsh and fragile ecological environment, has attracted great attention because of its sensitivity to global changes. Alpine grassland on the Tibetan Plateau has an important function in the global carbon cycle. Many studies have examined the effects of various environmental factors on biomass distribution. In this study, the relationships between the habitat parameters and the aboveground biomass (AGB) abundance on the Tibetan Plateau were examined through a meta-analysis of 110 field sites across the widely distributed alpine steppe and meadow. The obtained data were then analysed using the classification and regression tree model and the generalized additive model. The results showed that the AGB abundance in alpine steppe was positively correlated with six environmental factors, namely, soil organic carbon density of the top soil layer from 0 cm to 30 cm (SOC30 cm), longitude, mean annual precipitation (MAP), latitude, clay, and soil moisture. For the alpine meadow, five main factors were detected, namely, altitude, soil moisture, nitrogen, MAP, and mean annual temperature. The increased AGB abundance in the alpine steppe was associated with the increased SOC30 cm, MAP, and latitude, and the increased longitude resulted in decreased AGB abundance. For the alpine meadow, altitude and soil moisture showed strongly negative effects on AGB abundance, and soil nitrogen content was positively related to the AGB distribution across all examined sites. Our results suggest the combined effects of meteorological, topographic, and soil factors on the spatial patterns of AGB on the Tibetan Plateau

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Dynamics of above- and below-ground biomass and C, N, P accumulation in the alpine steppe of Northern Tibet

Cited by 9 publications

References 32 publications

Differences in species diversity, biomass, and soil properties of five types of alpine grasslands in the Northern Tibetan Plateau

Differences in species diversity, biomass, and soil properties of five types of alpine grasslands in the Northern Tibetan Plateau

Carbon and nitrogen allocation shifts in plants and soils along aridity and fertility gradients in grasslands of China

Meta-analysis of relationships between environmental factors and aboveground biomass in the alpine grassland on the Tibetan Plateau

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