Nutrient Limitation of Bacterial Growth in Soil
Lack of carbon has been assumed to be the most common limiting factor for bacterial growth in soil, although there are reports of limitation by nitrogen and phosphorus. I have studied nutrient limitation of bacterial growth in soil using a novel technique, where thymidine or leucine incorporation is...
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Department of Ecology, Lund University
2007
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ftulundlup:oai:lup.lub.lu.se:3deb9205-3ab0-4e00-8b4f-da0b5b4950a4 2023-05-15T18:28:37+02:00 Nutrient Limitation of Bacterial Growth in Soil Demoling, Fredrik 2007 https://lup.lub.lu.se/record/548005 eng eng Department of Ecology, Lund University https://lup.lub.lu.se/record/548005 urn:isbn:978-91-7105-252-0 Ecology Ekologi Fertilization Bacteria Soil Fungi Thymidine or Leucine incorporation Growth limitation Phosphorus Nitrogen Carbon thesis/doccomp info:eu-repo/semantics/doctoralThesis text 2007 ftulundlup 2023-02-01T23:32:09Z Lack of carbon has been assumed to be the most common limiting factor for bacterial growth in soil, although there are reports of limitation by nitrogen and phosphorus. I have studied nutrient limitation of bacterial growth in soil using a novel technique, where thymidine or leucine incorporation is used to detect changes in growth rates after adding nutrients. I have studied which nutrient(s) limited growth rates of bacteria in 28 Swedish soils. I found that bacterial growth in most of the soils was limited by a lack of carbon, and in some soils adding both carbon and nitrogen increased the bacterial growth rates even further. In three soils bacterial growth was concurrently limited by a lack of carbon as well as nitrogen. The effect of nitrogen fertilization on microorganisms was studied in three coniferous forest soils. Most indicators of microbial biomass and activity decreased in fertilized soils. Bacterial growth was limited by a lack of carbon, irrespective of fertilization treatment. However, nitrogen fertilization made the carbon limitation more pronounced. Long-term manipulations simulating different aspects of global climate change were studied in a subarctic tundra heath. Fertilization changed the nutrient that limited bacterial growth from concurrent limitations to carbon limitation. In warmed soils no significant change in bacterial growth limitation was observed. This indicated that warming did not increase mineralization sufficiently to change the limiting factors for bacterial growth. Effect of adding easily available and more complex carbon sources, with and without nitrogen, on fungal and bacterial growth and activity in soil was studied in the laboratory. There were indications of synergistic effects in that bacterial growth only increased after the fungi had started to grow, which occurred after adding cellulose. Treatments resulting in high bacterial growth rates led to decreased fungal growth rates compared with the control, indicating antagonistic effects of bacteria. Adding nitrogen did ... Doctoral or Postdoctoral Thesis Subarctic Tundra Lund University Publications (LUP) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Ekologi Fertilization Bacteria Soil Fungi Thymidine or Leucine incorporation Growth limitation Phosphorus Nitrogen Carbon |
spellingShingle |
Ecology Ekologi Fertilization Bacteria Soil Fungi Thymidine or Leucine incorporation Growth limitation Phosphorus Nitrogen Carbon Demoling, Fredrik Nutrient Limitation of Bacterial Growth in Soil |
topic_facet |
Ecology Ekologi Fertilization Bacteria Soil Fungi Thymidine or Leucine incorporation Growth limitation Phosphorus Nitrogen Carbon |
description |
Lack of carbon has been assumed to be the most common limiting factor for bacterial growth in soil, although there are reports of limitation by nitrogen and phosphorus. I have studied nutrient limitation of bacterial growth in soil using a novel technique, where thymidine or leucine incorporation is used to detect changes in growth rates after adding nutrients. I have studied which nutrient(s) limited growth rates of bacteria in 28 Swedish soils. I found that bacterial growth in most of the soils was limited by a lack of carbon, and in some soils adding both carbon and nitrogen increased the bacterial growth rates even further. In three soils bacterial growth was concurrently limited by a lack of carbon as well as nitrogen. The effect of nitrogen fertilization on microorganisms was studied in three coniferous forest soils. Most indicators of microbial biomass and activity decreased in fertilized soils. Bacterial growth was limited by a lack of carbon, irrespective of fertilization treatment. However, nitrogen fertilization made the carbon limitation more pronounced. Long-term manipulations simulating different aspects of global climate change were studied in a subarctic tundra heath. Fertilization changed the nutrient that limited bacterial growth from concurrent limitations to carbon limitation. In warmed soils no significant change in bacterial growth limitation was observed. This indicated that warming did not increase mineralization sufficiently to change the limiting factors for bacterial growth. Effect of adding easily available and more complex carbon sources, with and without nitrogen, on fungal and bacterial growth and activity in soil was studied in the laboratory. There were indications of synergistic effects in that bacterial growth only increased after the fungi had started to grow, which occurred after adding cellulose. Treatments resulting in high bacterial growth rates led to decreased fungal growth rates compared with the control, indicating antagonistic effects of bacteria. Adding nitrogen did ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Demoling, Fredrik |
author_facet |
Demoling, Fredrik |
author_sort |
Demoling, Fredrik |
title |
Nutrient Limitation of Bacterial Growth in Soil |
title_short |
Nutrient Limitation of Bacterial Growth in Soil |
title_full |
Nutrient Limitation of Bacterial Growth in Soil |
title_fullStr |
Nutrient Limitation of Bacterial Growth in Soil |
title_full_unstemmed |
Nutrient Limitation of Bacterial Growth in Soil |
title_sort |
nutrient limitation of bacterial growth in soil |
publisher |
Department of Ecology, Lund University |
publishDate |
2007 |
url |
https://lup.lub.lu.se/record/548005 |
genre |
Subarctic Tundra |
genre_facet |
Subarctic Tundra |
op_relation |
https://lup.lub.lu.se/record/548005 urn:isbn:978-91-7105-252-0 |
_version_ |
1766211169252540416 |