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Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability
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Zeitschriftentitel: | Arctic, Antarctic, and Alpine Research |
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Personen und Körperschaften: | , |
In: | Arctic, Antarctic, and Alpine Research, 37, 2005, 3, S. 396-401 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Institute of Arctic and Alpine Research
|
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ris.type |
EJOUR |
rft.atitle |
Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
rft.epage |
401 |
rft.genre |
article |
rft.issn |
1523-0430 1938-4246 |
rft.issue |
3 |
rft.jtitle |
Arctic, Antarctic, and Alpine Research |
rft.tpages |
5 |
rft.pages |
396-401 |
rft.pub |
Institute of Arctic and Alpine Research |
rft.date |
2005-08-01 |
x.date |
2005-08-01T00:00:00Z |
rft.spage |
396 |
rft.volume |
37 |
abstract |
<p>We investigated the influence of nitrogen (N) and phosphorus (P) on<tex-math>$N_{2}-fixation$</tex-math>and abundance of two of the most common<tex-math>$N_{2}-fixing$</tex-math>arctic lichens, Peltigera aphthosa and P. polydactyla, in two common moist upland tundra types, acidic and non-acidic tundra, at Toolik Lake, Alaska. Acidic tundra has higher N and lower P availability than non-acidic tundra. We measured the abundance of the lichens in control (no fertilization), N- and P- fertilized plots, and<tex-math>$N_{2}-fixation$</tex-math>using the acetylene reduction assay method on lichens from control and P-fertilized plots from both tundra types. Lichens on N-treated plots were too scarce to include in our<tex-math>$N_{2}-fixation$</tex-math>estimates. Lichen abundance was lower in plots fertilized with N than in control and P-fertilized plots, while per-biomass<tex-math>$N_{2}-fixation$</tex-math>rates were higher in P-fertilized plots than in control plots. Per-biomass rates of<tex-math>$N_{2}-fixation$</tex-math>did not differ between acidic and non-acidic tundra, but both lichen species are more abundant on acidic tundra. Thus, despite per-biomass stimulation of<tex-math>$N_{2}-fixation$</tex-math>by experimental P addition and reduction in lichen abundance with N fertilization, Peltigera contributes more N to the acidic tundra site, indicating that soil N and P availability are not the primary controls of<tex-math>$N_{2}-fixation$</tex-math>and abundance of these lichens.</p> |
authors |
Array
(
)
Array ( [rft.aulast] => Hobbie [rft.aufirst] => Sarah E. ) Array ( [rft.aulast] => Gettel [rft.aufirst] => Gretchen M. ) |
languages |
eng |
url |
https://www.jstor.org/stable/4095902 |
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author | Hobbie, Sarah E., Gettel, Gretchen M. |
author_facet | Hobbie, Sarah E., Gettel, Gretchen M., Hobbie, Sarah E., Gettel, Gretchen M. |
author_sort | hobbie, sarah e. |
collection | sid-55-col-jstorlife |
container_issue | 3 |
container_start_page | 396 |
container_title | Arctic, Antarctic, and Alpine Research |
container_volume | 37 |
description | <p>We investigated the influence of nitrogen (N) and phosphorus (P) on<tex-math>$N_{2}-fixation$</tex-math>and abundance of two of the most common<tex-math>$N_{2}-fixing$</tex-math>arctic lichens, Peltigera aphthosa and P. polydactyla, in two common moist upland tundra types, acidic and non-acidic tundra, at Toolik Lake, Alaska. Acidic tundra has higher N and lower P availability than non-acidic tundra. We measured the abundance of the lichens in control (no fertilization), N- and P- fertilized plots, and<tex-math>$N_{2}-fixation$</tex-math>using the acetylene reduction assay method on lichens from control and P-fertilized plots from both tundra types. Lichens on N-treated plots were too scarce to include in our<tex-math>$N_{2}-fixation$</tex-math>estimates. Lichen abundance was lower in plots fertilized with N than in control and P-fertilized plots, while per-biomass<tex-math>$N_{2}-fixation$</tex-math>rates were higher in P-fertilized plots than in control plots. Per-biomass rates of<tex-math>$N_{2}-fixation$</tex-math>did not differ between acidic and non-acidic tundra, but both lichen species are more abundant on acidic tundra. Thus, despite per-biomass stimulation of<tex-math>$N_{2}-fixation$</tex-math>by experimental P addition and reduction in lichen abundance with N fertilization, Peltigera contributes more N to the acidic tundra site, indicating that soil N and P availability are not the primary controls of<tex-math>$N_{2}-fixation$</tex-math>and abundance of these lichens.</p> |
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id | ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS80MDk1OTAy |
imprint | Institute of Arctic and Alpine Research, 2005 |
imprint_str_mv | Institute of Arctic and Alpine Research, 2005 |
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issn | 1523-0430, 1938-4246 |
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physical | 396-401 |
publishDate | 2005 |
publishDateSort | 2005 |
publisher | Institute of Arctic and Alpine Research |
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series | Arctic, Antarctic, and Alpine Research |
source_id | 55 |
spelling | Hobbie, Sarah E. Gettel, Gretchen M. 1523-0430 1938-4246 Institute of Arctic and Alpine Research https://www.jstor.org/stable/4095902 <p>We investigated the influence of nitrogen (N) and phosphorus (P) on<tex-math>$N_{2}-fixation$</tex-math>and abundance of two of the most common<tex-math>$N_{2}-fixing$</tex-math>arctic lichens, Peltigera aphthosa and P. polydactyla, in two common moist upland tundra types, acidic and non-acidic tundra, at Toolik Lake, Alaska. Acidic tundra has higher N and lower P availability than non-acidic tundra. We measured the abundance of the lichens in control (no fertilization), N- and P- fertilized plots, and<tex-math>$N_{2}-fixation$</tex-math>using the acetylene reduction assay method on lichens from control and P-fertilized plots from both tundra types. Lichens on N-treated plots were too scarce to include in our<tex-math>$N_{2}-fixation$</tex-math>estimates. Lichen abundance was lower in plots fertilized with N than in control and P-fertilized plots, while per-biomass<tex-math>$N_{2}-fixation$</tex-math>rates were higher in P-fertilized plots than in control plots. Per-biomass rates of<tex-math>$N_{2}-fixation$</tex-math>did not differ between acidic and non-acidic tundra, but both lichen species are more abundant on acidic tundra. Thus, despite per-biomass stimulation of<tex-math>$N_{2}-fixation$</tex-math>by experimental P addition and reduction in lichen abundance with N fertilization, Peltigera contributes more N to the acidic tundra site, indicating that soil N and P availability are not the primary controls of<tex-math>$N_{2}-fixation$</tex-math>and abundance of these lichens.</p> Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability Arctic, Antarctic, and Alpine Research |
spellingShingle | Hobbie, Sarah E., Gettel, Gretchen M., Arctic, Antarctic, and Alpine Research, Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title_full | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title_fullStr | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title_full_unstemmed | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title_short | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
title_sort | contrasting responses of nitrogen-fixation in arctic lichens to experimental and ambient nitrogen and phosphorus availability |
title_unstemmed | Contrasting Responses of Nitrogen-Fixation in Arctic Lichens to Experimental and Ambient Nitrogen and Phosphorus Availability |
url | https://www.jstor.org/stable/4095902 |