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Recovery of nitrogen cycling in riparian zones after stream restoration using δ15N along a 25-year chronosequence in northern Sweden

Maher Hasselquist, Eliza and Hasselquist, Niles and Sparks, Jed P. and Nilsson, Christer (2017). Recovery of nitrogen cycling in riparian zones after stream restoration using δ15N along a 25-year chronosequence in northern Sweden. Plant and soil. 410, 423-436
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Official URL: http://dx.doi.org/10.1007/s11104-016-3038-3

Abstract

Swedish boreal streams were modified to transport timber by pushing boulders to stream sides, creating levees that disconnected streams from riparian areas. Many streams have since been restored and our goal was to understand how this affects riparian nitrogen (N) cycling.We compared the natural abundance of delta N-15 isotopes in foliage and roots of Filipendula ulmaria plus soils and litter along streams restored 2-25 years ago. We measured sources of N, potential immobilization of N, namely plant diversity and biomass, and the amount and sources of carbon (C) to determine if these were important for describing riparian N cycling.The delta N-15 of F. ulmaria foliage changed dramatically just after restoration compared to the channelized, disconnected state and then converged over the next 25 years with the steady-state reference.The disturbance and reconnection of the stream with the riparian zone during restoration created a short-term pulse of N availability and gaseous losses of N as a result of enhanced microbial processing of N. With increasing time since restoration, N availability appears to have decreased, and N sources changed to those derived from mycorrhizae, amino acids, or the humus layer, or there was enhanced N-use efficiency by older, more diverse plant communities.

Authors/Creators:Maher Hasselquist, Eliza and Hasselquist, Niles and Sparks, Jed P. and Nilsson, Christer
Title:Recovery of nitrogen cycling in riparian zones after stream restoration using δ15N along a 25-year chronosequence in northern Sweden
Series/Journal:Plant and soil (0032-079X)
Year of publishing :2017
Volume:410
Page range:423-436
Number of Pages:14
Publisher:Springer
ISSN:0032-079X
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:K Forestry > K01 Forestry - General aspects
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Boreal, Mycorrhizae, Phytometer, Space-for-time substitution, Succession, Time gradient
URN:NBN:urn:nbn:se:slu:epsilon-e-4367
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4367
Additional ID:
Type of IDID
Web of Science (WoS)000392392200032
ID Code:14536
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:19 Sep 2017 12:54
Metadata Last Modified:19 Sep 2017 12:54

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