Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland
There is little information available on the mediating effects of soil nutrient stoichiometry and enzyme stoichiometry on soil carbon (C) during shrub encroachment and their contributions to changes in soil C. Here, we characterized the concentration and stock of soil organic carbon (SOC), inorganic...
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| Format: | Article |
| Language: | English |
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Italian Society of Silviculture and Forest Ecology (SISEF)
2020-02-01
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| Series: | iForest - Biogeosciences and Forestry |
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| Online Access: | https://iforest.sisef.org/contents/?id=ifor3091-012 |
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| author | Ding L Wang P Zhang W Zhang Y Li S Wei X Chen X Zhang Y Yang F |
| author_facet | Ding L Wang P Zhang W Zhang Y Li S Wei X Chen X Zhang Y Yang F |
| author_sort | Ding L |
| collection | DOAJ |
| description | There is little information available on the mediating effects of soil nutrient stoichiometry and enzyme stoichiometry on soil carbon (C) during shrub encroachment and their contributions to changes in soil C. Here, we characterized the concentration and stock of soil organic carbon (SOC), inorganic carbon (SIC) and total carbon (STC) along the shrub encroachment sequence (SES). We constructed linkages between soil C and SES with soil nutrient stoichiometric ratios and C-, nitrogen- and phosphorus-acquiring enzyme stoichiometry ratios using structural equation modeling (SEM), and disentangled the contributions of the soil nutrient stoichiometric ratios and enzyme stoichiometric ratios to shaping SOC and SIC using redundancy analysis (RDA) and SEM. Results revealed that the increases in STC stock derived from the increases in both the SOC stock and the SIC stock. Soil stoichiometric ratios played a mediating role in structuring soil C over SES, the mediating pattern depended on soil stoichiometry types (nutrient stoichiometry or enzyme stoichiometry) and soil C types (SOC, SIC or STC). Soil nutrient stoichiometric ratios contributed more than soil enzyme stoichiometric ratios to the variation in SOC and STC, while the contributions of these two types of soil stoichiometric ratios to the variation in SIC changed with soil stoichiometry types. Soil nutrient stoichiometry had positive or negative or threshold effects on soil C, but soil enzyme stoichiometry had monotonously increasing effects on soil C. This study showed that the soil stoichiometry had modulatory effects on soil C during shrub encroachment in the subalpine grassland, China. |
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| id | doaj.art-6986125e75b5431c9a5e695a1d67c3d7 |
| institution | Directory Open Access Journal |
| issn | 1971-7458 1971-7458 |
| language | English |
| last_indexed | 2024-12-21T22:07:00Z |
| publishDate | 2020-02-01 |
| publisher | Italian Society of Silviculture and Forest Ecology (SISEF) |
| record_format | Article |
| series | iForest - Biogeosciences and Forestry |
| spelling | doaj.art-6986125e75b5431c9a5e695a1d67c3d72022-12-21T18:48:40ZengItalian Society of Silviculture and Forest Ecology (SISEF)iForest - Biogeosciences and Forestry1971-74581971-74582020-02-01131657210.3832/ifor3091-0123091Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grasslandDing L0Wang P1Zhang W2Zhang Y3Li S4Wei X5Chen X6Zhang Y7Yang F8Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)Guizhou Institution of Prataculture, Guizhou Academy of Agricultural Sciences, Guiyang 550006, Guizhou (China)College of Animal Science, Guizhou University, Guiyang, Guizhou (China)There is little information available on the mediating effects of soil nutrient stoichiometry and enzyme stoichiometry on soil carbon (C) during shrub encroachment and their contributions to changes in soil C. Here, we characterized the concentration and stock of soil organic carbon (SOC), inorganic carbon (SIC) and total carbon (STC) along the shrub encroachment sequence (SES). We constructed linkages between soil C and SES with soil nutrient stoichiometric ratios and C-, nitrogen- and phosphorus-acquiring enzyme stoichiometry ratios using structural equation modeling (SEM), and disentangled the contributions of the soil nutrient stoichiometric ratios and enzyme stoichiometric ratios to shaping SOC and SIC using redundancy analysis (RDA) and SEM. Results revealed that the increases in STC stock derived from the increases in both the SOC stock and the SIC stock. Soil stoichiometric ratios played a mediating role in structuring soil C over SES, the mediating pattern depended on soil stoichiometry types (nutrient stoichiometry or enzyme stoichiometry) and soil C types (SOC, SIC or STC). Soil nutrient stoichiometric ratios contributed more than soil enzyme stoichiometric ratios to the variation in SOC and STC, while the contributions of these two types of soil stoichiometric ratios to the variation in SIC changed with soil stoichiometry types. Soil nutrient stoichiometry had positive or negative or threshold effects on soil C, but soil enzyme stoichiometry had monotonously increasing effects on soil C. This study showed that the soil stoichiometry had modulatory effects on soil C during shrub encroachment in the subalpine grassland, China.https://iforest.sisef.org/contents/?id=ifor3091-012encroachment successionsoil organic carbonsoil inorganic carbonsoil total carbonnutrient stoichiometryenzyme stoichiometrymediating effectrelative importance |
| spellingShingle | Ding L Wang P Zhang W Zhang Y Li S Wei X Chen X Zhang Y Yang F Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland iForest - Biogeosciences and Forestry encroachment succession soil organic carbon soil inorganic carbon soil total carbon nutrient stoichiometry enzyme stoichiometry mediating effect relative importance |
| title | Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| title_full | Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| title_fullStr | Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| title_full_unstemmed | Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| title_short | Soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| title_sort | soil stoichiometry modulates effects of shrub encroachment on soil carbon concentration and stock in a subalpine grassland |
| topic | encroachment succession soil organic carbon soil inorganic carbon soil total carbon nutrient stoichiometry enzyme stoichiometry mediating effect relative importance |
| url | https://iforest.sisef.org/contents/?id=ifor3091-012 |
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