(Table 3) Soil temperatures at 10 cm depth after different treatments of wet sedge meadows on Ellesmere Island
Fuente:
PANGAEA
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2011
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1867169081545719808 |
|---|---|
| author | Elliott, Tammy L Henry, Gregory HR |
| author_facet | Elliott, Tammy L Henry, Gregory HR |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Wet sedge tundra communities in the High Arctic are valuable sources of forage for several resident and migratory herbivores; however, the effects of grazing on these systems have been rarely studied. We simulated grazing in two wet sedge meadows at a site on Ellesmere Island that has not been affected by grazing. Over two summers, we clipped plots at four different frequencies and removed litter to assess effects on aboveground net primary production, availability of soil nitrogen, shoot concentrations of carbon and nitrogen, and soil temperature and moisture regimes. Available soil nitrate and ammonium were highest in plots with intermediate clipping frequencies. Shoot nitrogen concentrations were also greater at intermediate clipping frequencies in two of the four species studied. Aboveground net primary production decreased after clipping, regardless of frequency. Litter removal resulted in slightly increased soil moisture, but had no effect on aboveground net primary production. Soil temperature was not affected by any of our treatments. These results suggest that nitrogen cycling is stimulated by intermediate frequencies of simulated grazing, but clipping decreased aboveground net primary production in ungrazed high arctic wet sedge tundra. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_809480 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 3) Soil temperatures at 10 cm depth after different treatments of wet sedge meadows on Ellesmere Island Elliott, Tammy L Henry, Gregory HR Alexandra_Fiord; BIO; Biology; Clipping experiment; DATE/TIME; Date/time end; Ellesmere Island, Canadian Arctic Archipelago; International Polar Year (2007-2008); IPY; Number; Sample amount; Temperature, soil; Temperature, standard deviation; Treatment Wet sedge tundra communities in the High Arctic are valuable sources of forage for several resident and migratory herbivores; however, the effects of grazing on these systems have been rarely studied. We simulated grazing in two wet sedge meadows at a site on Ellesmere Island that has not been affected by grazing. Over two summers, we clipped plots at four different frequencies and removed litter to assess effects on aboveground net primary production, availability of soil nitrogen, shoot concentrations of carbon and nitrogen, and soil temperature and moisture regimes. Available soil nitrate and ammonium were highest in plots with intermediate clipping frequencies. Shoot nitrogen concentrations were also greater at intermediate clipping frequencies in two of the four species studied. Aboveground net primary production decreased after clipping, regardless of frequency. Litter removal resulted in slightly increased soil moisture, but had no effect on aboveground net primary production. Soil temperature was not affected by any of our treatments. These results suggest that nitrogen cycling is stimulated by intermediate frequencies of simulated grazing, but clipping decreased aboveground net primary production in ungrazed high arctic wet sedge tundra. |
| title | (Table 3) Soil temperatures at 10 cm depth after different treatments of wet sedge meadows on Ellesmere Island |
| topic | Alexandra_Fiord; BIO; Biology; Clipping experiment; DATE/TIME; Date/time end; Ellesmere Island, Canadian Arctic Archipelago; International Polar Year (2007-2008); IPY; Number; Sample amount; Temperature, soil; Temperature, standard deviation; Treatment |
| url | https://doi.org/10.1594/PANGAEA.809480 |