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Yu, Qin; Epstein, Howard E; Walker, Donald A (2009): (Table 1) Bioclimatic subzones and soil characteristics along the Yamal Arctic Transect, northwestern Siberia. PANGAEA,, Supplement to: Yu, Q et al. (2009): Simulating the effects of soil organic nitrogen and grazing on arctic tundra vegetation dynamics on the Yamal Peninsula, Russia. Environmental Research Letters, 4(4), 045027,

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Sustainability of tundra vegetation under changing climate on the Yamal Peninsula, northwestern Siberia, home to the world's largest area of reindeer husbandry, is of crucial importance to the local native community. An integrated investigation is needed for better understanding of the effects of soils, climate change and grazing on tundra vegetation in the Yamal region. In this study we applied a nutrient-based plant community model - ArcVeg - to evaluate how two factors (soil organic nitrogen (SON) levels and grazing) interact to affect tundra responses to climate warming across a latitudinal climatic gradient on the Yamal Peninsula. Model simulations were driven by field-collected soil data and expected grazing patterns along the Yamal Arctic Transect (YAT), within bioclimate subzones C (high arctic), D (northern low arctic) and E (southern low arctic). Plant biomass and NPP (net primary productivity) were significantly increased with warmer bioclimate subzones, greater soil nutrient levels and temporal climate warming, while they declined with higher grazing frequency. Temporal climate warming of 2 °C caused an increase of 665 g/m**2 in total biomass at the high SON site in subzone E, but only 298 g/m**2 at the low SON site. When grazing frequency was also increased, total biomass increased by only 369 g/m**2 at the high SON site in contrast to 184 g/m**2 at the low SON site in subzone E. Our results suggest that high SON can support greater plant biomass and plant responses to climate warming, while low SON and grazing may limit plant response to climate change. In addition to the first order factors (SON, bioclimate subzones, grazing and temporal climate warming), interactions among these significantly affect plant biomass and productivity in the arctic tundra and should not be ignored in regional scale studies.
Median Latitude: 69.806507 * Median Longitude: 68.074607 * South-bound Latitude: 67.694750 * West-bound Longitude: 66.889140 * North-bound Latitude: 71.194390 * East-bound Longitude: 68.890220
Minimum Elevation: 2.0 m * Maximum Elevation: 84.0 m
Kharasavey1 (KH) * Latitude: 71.178470 * Longitude: 66.979750 * Elevation: 17.0 m * Location: Yamal Peninsula, northwestern Siberia * Campaign: IPY-4 (International Polar Year 2007-2008) * Device: Multiple investigations (MULT)
Kharasavey2a (KH) * Latitude: 71.194390 * Longitude: 66.889140 * Elevation: 2.0 m * Location: Yamal Peninsula, northwestern Siberia * Campaign: IPY-4 (International Polar Year 2007-2008) * Device: Multiple investigations (MULT)
Laborovaya1 (LA) * Latitude: 67.706330 * Longitude: 67.999360 * Elevation: 84.0 m * Location: Yamal Peninsula, northwestern Siberia * Campaign: IPY-4 (International Polar Year 2007-2008) * Device: Multiple investigations (MULT)
Bulk density was labelled with "g/m³" in the article. As this is highly improbable with the given values, we assume that the unit should be "g/cm³". Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Time coverageCoverageYu, Qin
5Zone, biogeographicBiogeograph zoneYu, QinC = high arctic, D = northern low arctic, E = southern low arctic
6SiteSiteYu, Qin
7CarbonC%Yu, Qin
8Nitrogen, totalTN%Yu, Qin
9SandSand%Yu, Qin
10SiltSilt%Yu, Qin
11Size fraction < 0.002 mm, > 9 phi, clay<2 µm, >9 phi%Yu, Qin
12Density, dry bulkDBDg/cm3Yu, Qin
13Active layer depthALDcmYu, Qin
14Nitrogen, organic, particulatePONg/m2Yu, Qinsoil Norg
77 data points

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