Spectral characteristics of dissolved organic matter and its environmental responses across successional stages in a glacier retreat area
Dissolved organic matter (DOM), the most active type of soil organic matter, plays a key role in soil biogeochemical cycling. Therefore, exploring the source, composition, environmental response, and accumulation mechanism of DOM during vegetation succession has great significance for predicting soil carbon cycling. In this study, DOM was extracted from topsoil and subsoil at plots after 12, 30, 40, 50, 80, and 120 years of primary succession along the Hailuogou Glacier retreat area. The concentrations and spectral characteristics of DOM were analyzed via a combination of elemental analysis, ultraviolet-visible spectroscopy, and three-dimensional fluorescence excitation-emission matrix spectroscopy. The results showed that concentrations of soil dissolved organic carbon and dissolved organic nitrogen of both topsoil and subsoil increased significantly during vegetation succession. Along the chronosequence, the protein-like components and optical indices were significantly enhanced, humic-like components and the optical indices decreased, the aromaticity degree of DOM increased first and then decreased. Soil pH and NH4+-N content explained 62.2% of the total variation of surface soil DOM components, while soil moisture and pH explained 64.3% of that of subsurface soil DOM, indicating that environmental conditions were key factors affecting the concentrations and composition of soil DOM in the Hailuogou Glacier retreat area.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:33 |
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| Enthalten in: |
Ying yong sheng tai xue bao = The journal of applied ecology - 33(2022), 4 vom: 01. Apr., Seite 1074-1082 |
| Sprache: |
Chinesisch |
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| Weiterer Titel: |
冰川退缩区不同演替阶段土壤溶解性有机质光谱特征及环境响应 |
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| Beteiligte Personen: |
Liang, Zi-Yan [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 12.05.2022 Date Revised 04.08.2022 published: Print Citation Status MEDLINE |
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| doi: |
10.13287/j.1001-9332.202204.032 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM340712643 |
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| 245 | 1 | 0 | |a Spectral characteristics of dissolved organic matter and its environmental responses across successional stages in a glacier retreat area |
| 246 | 3 | 3 | |a 冰川退缩区不同演替阶段土壤溶解性有机质光谱特征及环境响应 |
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| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Dissolved organic matter (DOM), the most active type of soil organic matter, plays a key role in soil biogeochemical cycling. Therefore, exploring the source, composition, environmental response, and accumulation mechanism of DOM during vegetation succession has great significance for predicting soil carbon cycling. In this study, DOM was extracted from topsoil and subsoil at plots after 12, 30, 40, 50, 80, and 120 years of primary succession along the Hailuogou Glacier retreat area. The concentrations and spectral characteristics of DOM were analyzed via a combination of elemental analysis, ultraviolet-visible spectroscopy, and three-dimensional fluorescence excitation-emission matrix spectroscopy. The results showed that concentrations of soil dissolved organic carbon and dissolved organic nitrogen of both topsoil and subsoil increased significantly during vegetation succession. Along the chronosequence, the protein-like components and optical indices were significantly enhanced, humic-like components and the optical indices decreased, the aromaticity degree of DOM increased first and then decreased. Soil pH and NH4+-N content explained 62.2% of the total variation of surface soil DOM components, while soil moisture and pH explained 64.3% of that of subsurface soil DOM, indicating that environmental conditions were key factors affecting the concentrations and composition of soil DOM in the Hailuogou Glacier retreat area | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a glacial retreat | |
| 650 | 4 | |a primary succession | |
| 650 | 4 | |a soil dissolved organic matter | |
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| 650 | 4 | |a ultraviolet-visible absorption spectra | |
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| 700 | 1 | |a Li, Xiao-Ming |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Tao |e verfasserin |4 aut | |
| 700 | 1 | |a Duan, Bao-Li |e verfasserin |4 aut | |
| 700 | 1 | |a Lei, Yan-Bao |e verfasserin |4 aut | |
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