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Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition
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Zeitschriftentitel: | Ecosystems |
---|---|
Personen und Körperschaften: | |
In: | Ecosystems, 8, 2005, 6, S. 644-656 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Springer Science+Business Media
|
finc.format |
ElectronicArticle |
---|---|
finc.mega_collection |
sid-55-col-jstorlife JSTOR Life Sciences Archive |
finc.id |
ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8yNTA1Mzg2Mg |
finc.source_id |
55 |
ris.type |
EJOUR |
rft.atitle |
Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
rft.epage |
656 |
rft.genre |
article |
rft.issn |
1432-9840 1435-0629 |
rft.issue |
6 |
rft.jtitle |
Ecosystems |
rft.tpages |
12 |
rft.pages |
644-656 |
rft.pub |
Springer Science+Business Media |
rft.date |
2005-09-01 |
x.date |
2005-09-01T00:00:00Z |
rft.spage |
644 |
rft.volume |
8 |
abstract |
<p>Commonly observed positive correlations between litter nitrogen (N) concentrations and decomposition rates suggest that N frequently limits decomposition in its early stages. However, numerous studies have found little, if any, effect of N fertilization on decomposition. I directly compared internal substrate N and externally supplied inorganic N effects on decomposition in sites varying in soil N availability. I decomposed eight substrates (with initial %N from 0-2.5) in control and N-fertilized plots at eight grassland and forest sites in central Minnesota. N fertilization increased decomposition at only two of eight sites, even though decomposition was positively related to litter N at all sites and to soil N availability across sites. The effect of externally supplied N on decomposition was independent of litter N concentration, but was greater at sites with low N availability. The inconsistent effects of substrate and externally supplied N may have arisen because decomposers use organic N preferentially as an N source; because inorganic N availability across sites or with fertilization induced changes in microbial community attributes (for example, lower C:N or greater efficiency) that reduced the response of decomposition to increased inorganic N supply; or because the positive correlation between litter N or site N availability with decomposition was spurious, caused by tight correlations between litter or site N and some other factor that truly limited decomposition. These inconsistent effects of substrate N and external N supply on decomposition suggest that the oft-observed relationship between litter N and decomposition may not indicate N limitation of decomposition.</p> |
authors |
Array
(
[rft.aulast] => Hobbie
[rft.aufirst] => Sarah E.
)
|
languages |
eng |
url |
https://www.jstor.org/stable/25053862 |
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0.9 |
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author | Hobbie, Sarah E. |
author_facet | Hobbie, Sarah E., Hobbie, Sarah E. |
author_sort | hobbie, sarah e. |
collection | sid-55-col-jstorlife |
container_issue | 6 |
container_start_page | 644 |
container_title | Ecosystems |
container_volume | 8 |
description | <p>Commonly observed positive correlations between litter nitrogen (N) concentrations and decomposition rates suggest that N frequently limits decomposition in its early stages. However, numerous studies have found little, if any, effect of N fertilization on decomposition. I directly compared internal substrate N and externally supplied inorganic N effects on decomposition in sites varying in soil N availability. I decomposed eight substrates (with initial %N from 0-2.5) in control and N-fertilized plots at eight grassland and forest sites in central Minnesota. N fertilization increased decomposition at only two of eight sites, even though decomposition was positively related to litter N at all sites and to soil N availability across sites. The effect of externally supplied N on decomposition was independent of litter N concentration, but was greater at sites with low N availability. The inconsistent effects of substrate and externally supplied N may have arisen because decomposers use organic N preferentially as an N source; because inorganic N availability across sites or with fertilization induced changes in microbial community attributes (for example, lower C:N or greater efficiency) that reduced the response of decomposition to increased inorganic N supply; or because the positive correlation between litter N or site N availability with decomposition was spurious, caused by tight correlations between litter or site N and some other factor that truly limited decomposition. These inconsistent effects of substrate N and external N supply on decomposition suggest that the oft-observed relationship between litter N and decomposition may not indicate N limitation of decomposition.</p> |
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id | ai-55-aHR0cHM6Ly93d3cuanN0b3Iub3JnL3N0YWJsZS8yNTA1Mzg2Mg |
imprint | Springer Science+Business Media, 2005 |
imprint_str_mv | Springer Science+Business Media, 2005 |
institution | DE-15, DE-14, DE-D13 |
issn | 1432-9840, 1435-0629 |
issn_str_mv | 1432-9840, 1435-0629 |
language | English |
last_indexed | 2024-03-01T22:34:46.638Z |
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mega_collection | JSTOR Life Sciences Archive |
physical | 644-656 |
publishDate | 2005 |
publishDateSort | 2005 |
publisher | Springer Science+Business Media |
record_format | ai |
recordtype | ai |
score | 18,864033 |
series | Ecosystems |
source_id | 55 |
spelling | Hobbie, Sarah E. 1432-9840 1435-0629 Springer Science+Business Media https://www.jstor.org/stable/25053862 <p>Commonly observed positive correlations between litter nitrogen (N) concentrations and decomposition rates suggest that N frequently limits decomposition in its early stages. However, numerous studies have found little, if any, effect of N fertilization on decomposition. I directly compared internal substrate N and externally supplied inorganic N effects on decomposition in sites varying in soil N availability. I decomposed eight substrates (with initial %N from 0-2.5) in control and N-fertilized plots at eight grassland and forest sites in central Minnesota. N fertilization increased decomposition at only two of eight sites, even though decomposition was positively related to litter N at all sites and to soil N availability across sites. The effect of externally supplied N on decomposition was independent of litter N concentration, but was greater at sites with low N availability. The inconsistent effects of substrate and externally supplied N may have arisen because decomposers use organic N preferentially as an N source; because inorganic N availability across sites or with fertilization induced changes in microbial community attributes (for example, lower C:N or greater efficiency) that reduced the response of decomposition to increased inorganic N supply; or because the positive correlation between litter N or site N availability with decomposition was spurious, caused by tight correlations between litter or site N and some other factor that truly limited decomposition. These inconsistent effects of substrate N and external N supply on decomposition suggest that the oft-observed relationship between litter N and decomposition may not indicate N limitation of decomposition.</p> Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition Ecosystems |
spellingShingle | Hobbie, Sarah E., Ecosystems, Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title_full | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title_fullStr | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title_full_unstemmed | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title_short | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
title_sort | contrasting effects of substrate and fertilizer nitrogen on the early stages of litter decomposition |
title_unstemmed | Contrasting Effects of Substrate and Fertilizer Nitrogen on the Early Stages of Litter Decomposition |
url | https://www.jstor.org/stable/25053862 |