Disturbance, nutrient availability and plant growth in phenol-rich plant communities
Disturbances, such as fire, usually result in a higher N and nutrient availability. However, little is known regarding the role of fire-produced charcoal and other disturbance-induced effects on nutrient availability and the consequences for plant growth and ecosystem development. Late-successional...
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ftslunivuppsala:oai:pub.epsilon.slu.se:638 2024-06-09T07:49:50+00:00 Disturbance, nutrient availability and plant growth in phenol-rich plant communities Berglund, Linda 2004-09 application/pdf https://pub.epsilon.slu.se/638/ https://pub.epsilon.slu.se/638/1/AVHandling.Linda.pdf eng eng https://pub.epsilon.slu.se/638/1/AVHandling.Linda.pdf Berglund, Linda (2004). Disturbance, nutrient availability and plant growth in phenol-rich plant communities. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230 327 ISBN 91-576-6711-X [Doctoral thesis] Not in use please see Agris categories Doctoral thesis NonPeerReviewed 2004 ftslunivuppsala 2024-05-16T04:04:25Z Disturbances, such as fire, usually result in a higher N and nutrient availability. However, little is known regarding the role of fire-produced charcoal and other disturbance-induced effects on nutrient availability and the consequences for plant growth and ecosystem development. Late-successional boreal forests and subarctic forest-tundra ecotones are dominated by plants with high tissue-levels of phenolic compounds and have large quantities of N locked up in thick humus-layers. Factorial experiments were set up in both field and laboratory, manipulating amount of phenol-rich litter, charcoal and glycine. Nitrogen mineralization, nitrification, soluble P and phenolic compounds were measured by ionic and non-ionic resin capsules. Nitrogen-fixation was measured by acetylene reduction assays. Removal of phenol-rich litter with the charcoal-layer intact in a recently burned stand increased growth and nutrient uptake by tree seedlings, with birch (Betula pendula) being the most responsive species. Litter and charcoal may function synergistically thus influencing seedling establishment after fire, especially in early-successional species like birch. Nitrification-rates increased with addition of activated carbon (AC) (as a surrogate for fire-produced charcoal) in laboratory incubations of boreal and subarctic soils and phenolic accumulation on non-ionic resin-capsules was reduced by AC amendments. Nitrogen-fixation rates were found to increase linearly with time since fire. This increase was likely a function of the degree of colonization by cyanobacteria and site factors such as light, moisture and available N. Nitrogen addition rates of 4 Kg N ha -1 yr-1 eliminated Nfixation in late succession sites. The findings suggest that N-fixation in boreal forests becomes more important in late secondary succession were available N are low in spite of higher total N. Subarctic birch-forests had higher soluble P and phenol concentrations compared to heath tundra. In contrast, there were no differences in available NH4 + or ... Doctoral or Postdoctoral Thesis Subarctic Tundra Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive |
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English |
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Not in use please see Agris categories |
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Not in use please see Agris categories Berglund, Linda Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
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Not in use please see Agris categories |
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Disturbances, such as fire, usually result in a higher N and nutrient availability. However, little is known regarding the role of fire-produced charcoal and other disturbance-induced effects on nutrient availability and the consequences for plant growth and ecosystem development. Late-successional boreal forests and subarctic forest-tundra ecotones are dominated by plants with high tissue-levels of phenolic compounds and have large quantities of N locked up in thick humus-layers. Factorial experiments were set up in both field and laboratory, manipulating amount of phenol-rich litter, charcoal and glycine. Nitrogen mineralization, nitrification, soluble P and phenolic compounds were measured by ionic and non-ionic resin capsules. Nitrogen-fixation was measured by acetylene reduction assays. Removal of phenol-rich litter with the charcoal-layer intact in a recently burned stand increased growth and nutrient uptake by tree seedlings, with birch (Betula pendula) being the most responsive species. Litter and charcoal may function synergistically thus influencing seedling establishment after fire, especially in early-successional species like birch. Nitrification-rates increased with addition of activated carbon (AC) (as a surrogate for fire-produced charcoal) in laboratory incubations of boreal and subarctic soils and phenolic accumulation on non-ionic resin-capsules was reduced by AC amendments. Nitrogen-fixation rates were found to increase linearly with time since fire. This increase was likely a function of the degree of colonization by cyanobacteria and site factors such as light, moisture and available N. Nitrogen addition rates of 4 Kg N ha -1 yr-1 eliminated Nfixation in late succession sites. The findings suggest that N-fixation in boreal forests becomes more important in late secondary succession were available N are low in spite of higher total N. Subarctic birch-forests had higher soluble P and phenol concentrations compared to heath tundra. In contrast, there were no differences in available NH4 + or ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Berglund, Linda |
author_facet |
Berglund, Linda |
author_sort |
Berglund, Linda |
title |
Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
title_short |
Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
title_full |
Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
title_fullStr |
Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
title_full_unstemmed |
Disturbance, nutrient availability and plant growth in phenol-rich plant communities |
title_sort |
disturbance, nutrient availability and plant growth in phenol-rich plant communities |
publishDate |
2004 |
url |
https://pub.epsilon.slu.se/638/ https://pub.epsilon.slu.se/638/1/AVHandling.Linda.pdf |
genre |
Subarctic Tundra |
genre_facet |
Subarctic Tundra |
op_relation |
https://pub.epsilon.slu.se/638/1/AVHandling.Linda.pdf Berglund, Linda (2004). Disturbance, nutrient availability and plant growth in phenol-rich plant communities. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230 327 ISBN 91-576-6711-X [Doctoral thesis] |
_version_ |
1801382692268277760 |