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Multi-substrate induced respiration (functional capacity) in agriculturally degraded and intact restiad bogs: implications for carbon and nitrogen cycling

Lambie, S.M. and Ratcliffe, Joss (2020). Multi-substrate induced respiration (functional capacity) in agriculturally degraded and intact restiad bogs: implications for carbon and nitrogen cycling. Mires and Peat. 26 , 21 , 1-17
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Abstract

Natural peatlands provide ecosystem services such as carbon storage and habitat, which can be negatively affected (degraded) by the proximity of agricultural land due to lowered water table and increased nutrient deposition. We assessed peat biochemistry and microbial function in the dry, fluctuating and saturated zones of the peat deposits at Moanatuatua (degraded) and Kopuatai (intact) raised bogs in New Zealand to investigate the effects of adjacent agriculture on carbon (C) and nitrogen (N) cycling. Peat C and N density were elevated, due in part to greater bulk density, in the dry and saturated zones at Moanatuatua compared with Kopuatai. Functional capacity (multi-substrate induced respiration) at Moanatuatua was greater than at Kopuatai, and water-soluble C was at lower concentration but more degradable, indicating that microbes were C limited at Moanatuatua but N limited at Kopuatai. Greater microbial function at Moanatuatua infers C inputs may be more rapidly converted to gaseous or waterborne exports, and agriculturally affected peatlands may be more susceptible to losses of labile C. We conclude that proximity to agriculture is likely to have caused changes in chemical properties and altered microbial functioning of restiad bog and has important implications for C and N turnover within these peatland systems.

Authors/Creators:Lambie, S.M. and Ratcliffe, Joss
Title:Multi-substrate induced respiration (functional capacity) in agriculturally degraded and intact restiad bogs: implications for carbon and nitrogen cycling
Year of publishing :2020
Volume:26
Article number:21
Number of Pages:17
Publisher:International Mire Conservation Group, International Peatland Society
ISSN:1819-754X
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 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
URN:NBN:urn:nbn:se:slu:epsilon-p-106638
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106638
Additional ID:
Type of IDID
DOI10.19189/MaP.2019.OMB.StA.1816
ID Code:17418
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:07 Sep 2020 09:45
Metadata Last Modified:07 Sep 2020 09:45

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