NDLI: Nitrogen and Carbon Dynamics and the Role of Enchytraeid Worms in Decomposition of L, F and H Layers of Boreal Mor

Content Provider	Springer Nature Link
Author	Laurén, Ari Lappalainen, Mari Saari, Päivi Kukkonen, Jussi V. K. Koivusalo, Harri Piirainen, Sirpa Setälä, Heikki Sarjala, Tytti Bylund, Dan Heinen, Jaakko Nieminen, Mika Palviainen, Marjo Launiainen, Samuli Finér, Leena
Copyright Year	2012
Abstract	Decomposition of organic material releases carbon dioxide (CO$_{2}$) into the atmosphere, and dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and ammonium (NH$_{4}$–N) into soil water. Each of the decomposition products contributes differently to overall export of carbon (C) and nitrogen (N) to water courses. Our aim was to study the quantity and composition of the released C and N as affected by the organic material and soil fauna, represented by enchytraeid worms. We measured the release rate of carbon dioxide, and calculated the release rates for DOC and dissolved N in soil from repeated measurements of DOC and N pools during laboratory incubation of litter (L), fermented (F) and humus (H) layers of boreal forest mor. The intermediate decomposition products, DOC and DON, were characterised according to the molecule size. The release rate of the decomposition products was higher for fresh than for old organic material. The majority of N and C were released as NH$_{4}$–N and CO$_{2}$, respectively. The amount of extractable organic N in soil decreased by time but DON increased. Enchytraeids stimulated N mineralisation and the release of large molecule size DOC, particularly in L layer. The results suggest that organic N in extractable form biodegrades effectively, and that soil fauna have an important role in the decomposition. The results were interpreted from the water quality point of view and the implications of the results to modelling of decomposition and export of DOC and dissolved N to recipient water bodies are discussed. In the modelling context, the novelty of the study is the description of the intermediate decomposition products and the division of the dissolved organic compounds into low molecular weight and high molecular weight fractions.
Starting Page	3701
Ending Page	3719
Page Count	19
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	223
Issue Number	7
e-ISSN	15732932
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-28
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ammonium Carbon dioxide Dissolved organic carbon Dissolved organic nitrogen Nitrate Soil fauna Hydrogeology Environment Climate Change Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Soil Science & Conservation Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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