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| Titel |
Meta-analysis of relationships between environmental factors and aboveground biomass in the alpine grassland on the Tibetan Plateau |
| VerfasserIn |
J. Sun, G. W. Cheng, W. P. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 3 ; Nr. 10, no. 3 (2013-03-13), S.1707-1715 |
| Datensatznummer |
250018150
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| Publikation (Nr.) |
 copernicus.org/bg-10-1707-2013.pdf |
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| Zusammenfassung |
| 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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