Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska
This paper reports results of a study designed to examine the control that soil temperature exerts on soil processes associated with nutrient flux, and in turn, on tree nutrition in interior Alaska black spruce ecosystems. Approximately 50 m 2 of forest floor in a 140-year-old black spruce ecosystem...
Published in: | Canadian Journal of Forest Research |
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Language: | English |
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Canadian Science Publishing
1990
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Online Access: | http://dx.doi.org/10.1139/x90-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/x90-203 |
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crcansciencepubl:10.1139/x90-203 2024-06-23T07:56:08+00:00 Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska Cleve, Keith Van Oechel, Walter C. Hom, John L. 1990 http://dx.doi.org/10.1139/x90-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/x90-203 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 20, issue 9, page 1530-1535 ISSN 0045-5067 1208-6037 journal-article 1990 crcansciencepubl https://doi.org/10.1139/x90-203 2024-06-06T04:11:16Z This paper reports results of a study designed to examine the control that soil temperature exerts on soil processes associated with nutrient flux, and in turn, on tree nutrition in interior Alaska black spruce ecosystems. Approximately 50 m 2 of forest floor in a 140-year-old black spruce ecosystem, which had developed on permafrost, was heated to 8–10 °C above ambient temperature. This perturbation amounted to approximately a 1589 degree-day seasonal heat sum (above 0 °C), 1026 degree-days above the control total of 563 degree-days. The forest floor, surface 5 cm of mineral soil, and soil solution were compared with those of an adjacent control plot to evaluate the change in nutrient content and decomposition rate of the forest floor. The nutritional response to soil heating of current black spruce foliage also was evaluated. Soil heating significantly increased decomposition of the forest floor, principally because of an increase in biomass loss of the O21 layer. The increased decomposition resulted in greater extractable N and P concentrations in the forest floor, higher N concentrations in the soil solution, and elevated spruce needle N, P, and K concentrations for the experimental period. These results are discussed in light of the importance of soil temperature and other state factors that mediate ecosystem function. Article in Journal/Newspaper permafrost Alaska Canadian Science Publishing Canadian Journal of Forest Research 20 9 1530 1535 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
This paper reports results of a study designed to examine the control that soil temperature exerts on soil processes associated with nutrient flux, and in turn, on tree nutrition in interior Alaska black spruce ecosystems. Approximately 50 m 2 of forest floor in a 140-year-old black spruce ecosystem, which had developed on permafrost, was heated to 8–10 °C above ambient temperature. This perturbation amounted to approximately a 1589 degree-day seasonal heat sum (above 0 °C), 1026 degree-days above the control total of 563 degree-days. The forest floor, surface 5 cm of mineral soil, and soil solution were compared with those of an adjacent control plot to evaluate the change in nutrient content and decomposition rate of the forest floor. The nutritional response to soil heating of current black spruce foliage also was evaluated. Soil heating significantly increased decomposition of the forest floor, principally because of an increase in biomass loss of the O21 layer. The increased decomposition resulted in greater extractable N and P concentrations in the forest floor, higher N concentrations in the soil solution, and elevated spruce needle N, P, and K concentrations for the experimental period. These results are discussed in light of the importance of soil temperature and other state factors that mediate ecosystem function. |
format |
Article in Journal/Newspaper |
author |
Cleve, Keith Van Oechel, Walter C. Hom, John L. |
spellingShingle |
Cleve, Keith Van Oechel, Walter C. Hom, John L. Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
author_facet |
Cleve, Keith Van Oechel, Walter C. Hom, John L. |
author_sort |
Cleve, Keith Van |
title |
Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
title_short |
Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
title_full |
Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
title_fullStr |
Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
title_full_unstemmed |
Response of black spruce ( Piceamariana) ecosystems to soil temperature modification in interior Alaska |
title_sort |
response of black spruce ( piceamariana) ecosystems to soil temperature modification in interior alaska |
publisher |
Canadian Science Publishing |
publishDate |
1990 |
url |
http://dx.doi.org/10.1139/x90-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/x90-203 |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_source |
Canadian Journal of Forest Research volume 20, issue 9, page 1530-1535 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x90-203 |
container_title |
Canadian Journal of Forest Research |
container_volume |
20 |
container_issue |
9 |
container_start_page |
1530 |
op_container_end_page |
1535 |
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1802649031339409408 |