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Changes in the Quality of Chromophoric Dissolved Organic Matter Leached from Senescent Leaf Litter during the Early Decomposition

2012; Wiley; Volume: 41; Issue: 3 Linguagem: Inglês

10.2134/jeq2011.0342

1537-2537

Satoshi Nishimura, Nagamitsu Maie, Mitsuhisa Baba, Takahiro Sudo, Toshihiro Sugiura, Eikichi Shima,

Heavy metals in environment

Journal of Environmental QualityVolume 41, Issue 3 p. 823-833 Plant and Environment Interaction Changes in the Quality of Chromophoric Dissolved Organic Matter Leached from Senescent Leaf Litter during the Early Decomposition Satoshi Nishimura, Satoshi Nishimura Graduate School of Veterinary Medicine & Animal Sciences, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorNagamitsu Maie, Corresponding Author Nagamitsu Maie maie@vmas.kitasato-u.ac.jp School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanCorresponding author (maie@vmas.kitasato-u.ac.jp).Search for more papers by this authorMitsuhisa Baba, Mitsuhisa Baba School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorTakahiro Sudo, Takahiro Sudo School of Veterinary Medicine & Animal Sciences, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanAssigned to Associate Editor Tsutomu OhnoSearch for more papers by this authorToshihiro Sugiura, Toshihiro Sugiura School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorEikichi Shima, Eikichi Shima School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this author Satoshi Nishimura, Satoshi Nishimura Graduate School of Veterinary Medicine & Animal Sciences, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorNagamitsu Maie, Corresponding Author Nagamitsu Maie maie@vmas.kitasato-u.ac.jp School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanCorresponding author (maie@vmas.kitasato-u.ac.jp).Search for more papers by this authorMitsuhisa Baba, Mitsuhisa Baba School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorTakahiro Sudo, Takahiro Sudo School of Veterinary Medicine & Animal Sciences, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanAssigned to Associate Editor Tsutomu OhnoSearch for more papers by this authorToshihiro Sugiura, Toshihiro Sugiura School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this authorEikichi Shima, Eikichi Shima School of Veterinary Medicine, Kitasato Univ., 23-35-1 Higashi, Towada, Aomori, 034-8628 JapanSearch for more papers by this author First published: 01 May 2012 https://doi.org/10.2134/jeq2011.0342Citations: 15 All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Chromophoric dissolved organic matter (CDOM) leached from leaf litter is a major source of humus in mineral soil of forest ecosystems. While their functions and refractoriness depend on the physicochemical structure, there is little information on the quality of CDOM, especially for that leached in the very early stages of litter decomposition when a large amount of dissolved organic matter (DOM) is leached. This study aimed to better understand the variations/changes in the composition of CDOM leached from senescent leaf litter from two tree species during the early stage of decomposition. Leaf litter from a conifer tree (Japanese cedar, Cryptomeria japonica D. Don) and a deciduous broad-leaved tree (Konara oak, Quercus serrata Thunb.) were incubated in columns using simulated rainfall events periodically for a total of 300 d at 20°C. The quality of CDOM was investigated based on the fluorescence properties by using a combination of excitation–emission matrix fluorescence (EEM) and parallel factor analysis (PARAFAC). In addition, the phenolic composition of DOM was investigated at a molecular level by thermally assisted hydrolysis and methylation–gas chromatography–mass spectrometry (THM-GC-MS) in the presence of tetramethylammonium hydroxide (TMAH). The EEM was statistically decomposed into eight fluorescence components (two tannin/peptide-like peaks, one protein-like peak, and five humic-like peaks). A significant contribution of tannin/peptide-like peaks was observed at the beginning of incubation, but these peaks decreased quickly and humic-like peaks increased within 1 mo of incubation. The composition of humic-like peaks was different between tree species and changed over the incubation period. Since tannin-derived phenolic compounds were detected in the DOM collected after 254 d of incubation on THM-GC-MS, it was suggested that tannins partially changed its structure, forming various humic-like peaks during the early decomposition. Citing Literature Volume41, Issue3May 2012Pages 823-833 RelatedInformation