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Long-term nitrogen enrichment does not increase microbial phosphorus mobilization in a northern coniferous forest

Forsmark, Benjamin and Wallander, Hakan and Nordin, Annika and Gundale, Michael (2021). Long-term nitrogen enrichment does not increase microbial phosphorus mobilization in a northern coniferous forest. Functional Ecology. 35 , 277-287
[Journal article]

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Abstract

Nitrogen (N) deposition can enhance carbon (C) capture and storage in northern coniferous forests but it may also enhance the demand for phosphorus (P). While it is well established that long-term N enrichment can decrease decomposition and enhance the accumulation of C in soils, it remains uncertain if a higher demand and acquisition of P influence soil C.We studied microbial phosphorus mobilization and growth within a long-term N enrichment experiment in a Norway spruce forest, where N deposition was simulated by adding 0, 12.5 or 50 kg N ha(-1) year(-1) for 21 years (n = 12), by incubating microbial ingrowth cores with needles and humus with low and high P content, and with sand with and without mineral apatite P.Long-term N enrichment had no effect on microbial P mobilization in needles and humus and did not enhance the positive effect that apatite had on fungal growth. However, it consistently strengthened the retention of C in the soil by decreasing decomposition of needle and humus, both with low and high P content, and by increasing fungal growth in sand-filled ingrowth cores. Furthermore, we did not find any evidence that higher microbial P mobilization in response to N enrichment affected soil C storage.These results show that long-term N enrichment in relatively young soils dominated by coniferous trees and ectomycorrhizal fungi can have relatively small impact on microbial P mobilization from organic sources and on the potential to mobilize P from minerals, and subsequently that elevated P demand due to N enrichment is unlikely to lead to a reduction in the soil C accumulation rate.A free Plain Language Summary can be found within the Supporting Information of this article.

Authors/Creators:Forsmark, Benjamin and Wallander, Hakan and Nordin, Annika and Gundale, Michael
Title:Long-term nitrogen enrichment does not increase microbial phosphorus mobilization in a northern coniferous forest
Series Name/Journal:Functional Ecology
Year of publishing :2021
Volume:35
Page range:277-287
Number of Pages:11
Publisher:WILEY
ISSN:0269-8463
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:apatite, boreal forest, carbon sequestration, decomposition, ectomycorrhizal fungi, nitrogen deposition, soil phosphorus
URN:NBN:urn:nbn:se:slu:epsilon-p-109029
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109029
Additional ID:
Type of IDID
DOI10.1111/1365-2435.13701
Web of Science (WoS)000586237300001
ID Code:22162
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:09 Feb 2021 07:58
Metadata Last Modified:09 Feb 2021 08:01

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