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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1111/nph.15006
|2 doi
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|a pubmed24n0935.xml
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|a eng
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|a Britton, Andrea J
|e verfasserin
|4 aut
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|a Nitrogen deposition drives loss of moss cover in alpine moss-sedge heath via lowered C : N ratio and accelerated decomposition
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 19.09.2019
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust.
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|a In alpine ecosystems, nitrogen (N) deposition has been linked to plant community composition change, including loss of bryophytes and increase of graminoids. Since bryophyte growth is stimulated by increased N availability, it has been hypothesized that loss of bryophyte cover is driven by enhanced decomposition. As bryophyte mats are a significant carbon (C) store, their loss may impact C storage in these ecosystems. We used an N deposition gradient across 15 sites in the UK to examine effects of N deposition on bryophyte litter quality, decomposition and C and N stocks in Racomitrium moss-sedge heath. Increasing N deposition reduced C : N in bryophyte litter, which in turn enhanced decomposition. Soil N stocks increased significantly in response to increased N deposition, and soil C : N declined. However, depletion of the bryophyte mat and its replacement by graminoids under high N deposition was not associated with a change in total ecosystem C stocks. We conclude that decomposition processes in Racomitrium heath are very sensitive to N deposition and provide a mechanism by which N deposition drives depletion of the bryophyte mat. Nitrogen deposition did not measurably alter C stocks, but changes in soil N stocks and C : N suggest the ecosystem is becoming N saturated
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a C : N ratio
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|a Racomitrium heath
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|a bryophytes
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|a carbon pool
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|a community composition
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|a litter decomposition
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|a nitrogen pool
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|a nitrogen saturation
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|a Carbon
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|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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|a Mitchell, Ruth J
|e verfasserin
|4 aut
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|a Fisher, Julia M
|e verfasserin
|4 aut
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| 700 |
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|a Riach, David J
|e verfasserin
|4 aut
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|a Taylor, Andy F S
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 218(2018), 2 vom: 03. Apr., Seite 470-478
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|x 1469-8137
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|g volume:218
|g year:2018
|g number:2
|g day:03
|g month:04
|g pages:470-478
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|u http://dx.doi.org/10.1111/nph.15006
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