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| Auteurs principaux: | , , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2011
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| Accès en ligne: | https://doi.org/10.1594/PANGAEA.837086 |
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| _version_ | 1867171827793526784 |
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| author | Sjögersten, Sofie van der Wal, René Loonen, Maarten J J E Woodin, Sarah J |
| author_facet | Sjögersten, Sofie van der Wal, René Loonen, Maarten J J E Woodin, Sarah J |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The carbon (C) sink strength of arctic tundra is under pressure from increasing populations of arctic breeding geese. In this study we examined how CO2 and CH4 fluxes, plant biomass and soil C responded to the removal of vertebrate herbivores in a high arctic wet moss meadow that has been intensively used by barnacle geese (Branta leucopsis) for ca. 20 years. We used 4 and 9 years old grazing exclosures to investigate the potential for recovery of ecosystem function during the growing season (July 2007). The results show greater above- and below-ground vascular plant biomass within the grazing exclosures with graminoid biomass being most responsive to the removal of herbivory whilst moss biomass remained unchanged. The changes in biomass switched the system from net emission to net uptake of CO2 (0.47 and -0.77 µmol/m**2/s in grazed and exclosure plots, respectively) during the growing season and doubled the C storage in live biomass. In contrast, the treatment had no impact on the CH4 fluxes, the total litter C pool or the soil C concentration. The rapid recovery of the above ground biomass and CO2 fluxes demonstrates the plasticity of this high arctic ecosystem in terms of response to changing herbivore pressure. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_837086 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Carbon pools in different vegetation components in grazed and ungrazed plots near Ny-Ålesund, Spitzbergen Sjögersten, Sofie van der Wal, René Loonen, Maarten J J E Woodin, Sarah J Area/locality; Biomass as carbon, standard deviation; Biomass as carbon per area; DATE/TIME; International Polar Year (2007-2008); IPY; NY-Al; Ny-Ålesund, Spitsbergen; Treatment The carbon (C) sink strength of arctic tundra is under pressure from increasing populations of arctic breeding geese. In this study we examined how CO2 and CH4 fluxes, plant biomass and soil C responded to the removal of vertebrate herbivores in a high arctic wet moss meadow that has been intensively used by barnacle geese (Branta leucopsis) for ca. 20 years. We used 4 and 9 years old grazing exclosures to investigate the potential for recovery of ecosystem function during the growing season (July 2007). The results show greater above- and below-ground vascular plant biomass within the grazing exclosures with graminoid biomass being most responsive to the removal of herbivory whilst moss biomass remained unchanged. The changes in biomass switched the system from net emission to net uptake of CO2 (0.47 and -0.77 µmol/m**2/s in grazed and exclosure plots, respectively) during the growing season and doubled the C storage in live biomass. In contrast, the treatment had no impact on the CH4 fluxes, the total litter C pool or the soil C concentration. The rapid recovery of the above ground biomass and CO2 fluxes demonstrates the plasticity of this high arctic ecosystem in terms of response to changing herbivore pressure. |
| title | (Table 1) Carbon pools in different vegetation components in grazed and ungrazed plots near Ny-Ålesund, Spitzbergen |
| topic | Area/locality; Biomass as carbon, standard deviation; Biomass as carbon per area; DATE/TIME; International Polar Year (2007-2008); IPY; NY-Al; Ny-Ålesund, Spitsbergen; Treatment |
| url | https://doi.org/10.1594/PANGAEA.837086 |