Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM

We investigated changes in the quantity and quality of dissolved organic matter (DOM) from rain to stream water in a forested watershed at Yamashiro Experimental Forest (YMS) in southern Kyoto prefecture. The dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA<...
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Autor*in:	Shinji Kaneko [verfasserIn] Hitomi Furusawa [verfasserIn] Toru Okamoto [verfasserIn] Yasuhiro Hirano [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	dissolved organic carbon (DOC) UV absorbance SUVA water quality

Übergeordnetes Werk:	In: Forests - MDPI AG, 2010, 13(2022), 4, p 510
Übergeordnetes Werk:	volume:13 ; year:2022 ; number:4, p 510

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/f13040510

Katalog-ID:	DOAJ04267641X

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520			\|a We investigated changes in the quantity and quality of dissolved organic matter (DOM) from rain to stream water in a forested watershed at Yamashiro Experimental Forest (YMS) in southern Kyoto prefecture. The dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA<sub<254</sub<) in rainwater increased in the order of bulk rain, throughfall, stemflow, and O layer leachate because of the DOM supply from tree tissue and O layer. Decreases in DOC concentration and SUVA<sub<254</sub< with soil depth were not observed in the soil-percolating water. This finding may have been caused by the low free oxide content of the soil and the collection of soil water with a tension-free lysimeter. The DOC concentration was very low in both seepage and stream waters; seasonal variation with a high concentration in summer was observed in the stream water. An increase in K<sup<+</sup< concentration in summer was also observed in the stream water; thus, we presumed that DOC seasonal variation was caused by the DOM supply with the accumulated decomposition of litter in the streambed. The significant correlation between DOC concentration and absorbance at 254 nm (UV<sub<254</sub<) was observed for all sample types of observation target in the watershed; the ratio of DOC concentration to UV<sub<254</sub< was different, while the correlation coefficient between DOC concentration and UV<sub<254</sub< value differed among sample types in the watershed. We concluded that UV<sub<254</sub< which can be measured by simply and easily is a good indicator for estimating DOC concentration in liquid samples in forested watersheds.
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language	English
source	In Forests 13(2022), 4, p 510 volume:13 year:2022 number:4, p 510
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topic_facet	dissolved organic carbon (DOC) UV absorbance SUVA<sub<254</sub< water quality Plant ecology
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container_title	Forests
authorswithroles_txt_mv	Shinji Kaneko @@aut@@ Hitomi Furusawa @@aut@@ Toru Okamoto @@aut@@ Yasuhiro Hirano @@aut@@
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callnumber-first	Q - Science
author	Shinji Kaneko
spellingShingle	Shinji Kaneko misc QK900-989 misc dissolved organic carbon (DOC) misc UV absorbance misc SUVA<sub<254</sub< misc water quality misc Plant ecology Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM
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topic_title	QK900-989 Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM dissolved organic carbon (DOC) UV absorbance SUVA<sub<254</sub< water quality
topic	misc QK900-989 misc dissolved organic carbon (DOC) misc UV absorbance misc SUVA<sub<254</sub< misc water quality misc Plant ecology
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title	Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM
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title_full	Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM
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author_browse	Shinji Kaneko Hitomi Furusawa Toru Okamoto Yasuhiro Hirano
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title_sort	dissolved organic matter (dom) in a warm-temperate forested watershed—a possibility of ultraviolet absorbance as an indicator of dom
callnumber	QK900-989
title_auth	Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM
abstract	We investigated changes in the quantity and quality of dissolved organic matter (DOM) from rain to stream water in a forested watershed at Yamashiro Experimental Forest (YMS) in southern Kyoto prefecture. The dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA<sub<254</sub<) in rainwater increased in the order of bulk rain, throughfall, stemflow, and O layer leachate because of the DOM supply from tree tissue and O layer. Decreases in DOC concentration and SUVA<sub<254</sub< with soil depth were not observed in the soil-percolating water. This finding may have been caused by the low free oxide content of the soil and the collection of soil water with a tension-free lysimeter. The DOC concentration was very low in both seepage and stream waters; seasonal variation with a high concentration in summer was observed in the stream water. An increase in K<sup<+</sup< concentration in summer was also observed in the stream water; thus, we presumed that DOC seasonal variation was caused by the DOM supply with the accumulated decomposition of litter in the streambed. The significant correlation between DOC concentration and absorbance at 254 nm (UV<sub<254</sub<) was observed for all sample types of observation target in the watershed; the ratio of DOC concentration to UV<sub<254</sub< was different, while the correlation coefficient between DOC concentration and UV<sub<254</sub< value differed among sample types in the watershed. We concluded that UV<sub<254</sub< which can be measured by simply and easily is a good indicator for estimating DOC concentration in liquid samples in forested watersheds.
abstractGer	We investigated changes in the quantity and quality of dissolved organic matter (DOM) from rain to stream water in a forested watershed at Yamashiro Experimental Forest (YMS) in southern Kyoto prefecture. The dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA<sub<254</sub<) in rainwater increased in the order of bulk rain, throughfall, stemflow, and O layer leachate because of the DOM supply from tree tissue and O layer. Decreases in DOC concentration and SUVA<sub<254</sub< with soil depth were not observed in the soil-percolating water. This finding may have been caused by the low free oxide content of the soil and the collection of soil water with a tension-free lysimeter. The DOC concentration was very low in both seepage and stream waters; seasonal variation with a high concentration in summer was observed in the stream water. An increase in K<sup<+</sup< concentration in summer was also observed in the stream water; thus, we presumed that DOC seasonal variation was caused by the DOM supply with the accumulated decomposition of litter in the streambed. The significant correlation between DOC concentration and absorbance at 254 nm (UV<sub<254</sub<) was observed for all sample types of observation target in the watershed; the ratio of DOC concentration to UV<sub<254</sub< was different, while the correlation coefficient between DOC concentration and UV<sub<254</sub< value differed among sample types in the watershed. We concluded that UV<sub<254</sub< which can be measured by simply and easily is a good indicator for estimating DOC concentration in liquid samples in forested watersheds.
abstract_unstemmed	We investigated changes in the quantity and quality of dissolved organic matter (DOM) from rain to stream water in a forested watershed at Yamashiro Experimental Forest (YMS) in southern Kyoto prefecture. The dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA<sub<254</sub<) in rainwater increased in the order of bulk rain, throughfall, stemflow, and O layer leachate because of the DOM supply from tree tissue and O layer. Decreases in DOC concentration and SUVA<sub<254</sub< with soil depth were not observed in the soil-percolating water. This finding may have been caused by the low free oxide content of the soil and the collection of soil water with a tension-free lysimeter. The DOC concentration was very low in both seepage and stream waters; seasonal variation with a high concentration in summer was observed in the stream water. An increase in K<sup<+</sup< concentration in summer was also observed in the stream water; thus, we presumed that DOC seasonal variation was caused by the DOM supply with the accumulated decomposition of litter in the streambed. The significant correlation between DOC concentration and absorbance at 254 nm (UV<sub<254</sub<) was observed for all sample types of observation target in the watershed; the ratio of DOC concentration to UV<sub<254</sub< was different, while the correlation coefficient between DOC concentration and UV<sub<254</sub< value differed among sample types in the watershed. We concluded that UV<sub<254</sub< which can be measured by simply and easily is a good indicator for estimating DOC concentration in liquid samples in forested watersheds.
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container_issue	4, p 510
title_short	Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM
url	https://doi.org/10.3390/f13040510 https://doaj.org/article/2469c83bc7714781bc21254a04502233 https://www.mdpi.com/1999-4907/13/4/510 https://doaj.org/toc/1999-4907
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Dissolved Organic Matter (DOM) in a Warm-Temperate Forested Watershed—A Possibility of Ultraviolet Absorbance as an Indicator of DOM

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