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| Autori principali: | , , , , , , , , , , , , , , , , , |
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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Global change biology
2026
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| Accesso online: | https://pubmed.ncbi.nlm.nih.gov/41705626/ |
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| _version_ | 1868266084865409024 |
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| author | Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming |
| author_facet | Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming |
| collection | PubMed - marine biology |
| contents | Mineral Association and Microbial Processing Jointly Prolong Carbon Turnover in Coastal Wetlands. Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming Wetlands Soil Microbiology Carbon Soil Carbon Sequestration Minerals China Seashore Coastal margins are critical sites for carbon (C) sequestration, yet the mechanisms stabilizing preaged, allochthonous C (externally-derived biospheric C) in these environments remain poorly understood. Specifically, the interplay between mineral association and microbial processing represents a significant knowledge gap. Here, we investigated C sequestration mechanisms in Chinese mangrove and saltmarsh soils by analyzing topsoils and cores across 36 sites spanning a 20-degree latitudinal transect. We found that saltmarshes, characterized by high mineral accretion and lower relative autochthonous C accumulation, exhibited significantly longer soil organic C (SOC) turnover times than mangroves (topsoils: ~2200 vs. ~500 years, respectively). This difference corresponded to higher proportions of preaged (~50%) and petrogenic (rock-derived; ~20%) SOC in saltmarshes. Linear mixed-effects models (LMM) confirmed that proxies for mineral protection (e.g., Al/Si) and advanced decomposition (lignin oxidation) were robust, positive predictors of turnover time across the latitudinal gradient. Further structural equation modeling (SEM) indicated a depth-dependent shift in drivers. In surface soils, microbial necromass accumulation was a significant predictor of C turnover (coefficient = 0.36). However, at depth (1 m), the degree of lignin degradation emerged as the primary predictor of multi-millennial C persistence (coefficient = 0.45). These results suggest a joint regulation mechanism whereby microbial processing transforms organic matter into stable forms that are subsequently protected by minerals. This mechanism effectively sequesters old, allochthonous C, challenging the paradigm that blue C storage is dominated solely by recent biomass and necessitating a reevaluation of coastal C management frameworks. |
| format | Artículo científico |
| id | pubmed_41705626 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | Global change biology |
| record_format | pubmed |
| spellingShingle | Mineral Association and Microbial Processing Jointly Prolong Carbon Turnover in Coastal Wetlands. Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming Wetlands Soil Microbiology Carbon Soil Carbon Sequestration Minerals China Seashore Mineral Association and Microbial Processing Jointly Prolong Carbon Turnover in Coastal Wetlands. Li, Yuan Fu, Chuancheng Ren, Peng Song, Zhaoliang Ni, Lingfang Wang, Ting Yu, Changxun Chen, Ji Guo, Laodong Hartley, Iain P He, Ding Ouyang, Xiaoguang Zhi, Wei Xia, Shaopan Wang, Weiqi Zhao, Mingliang Han, Guangxuan Luo, Yongming Wetlands Soil Microbiology Carbon Soil Carbon Sequestration Minerals China Seashore Coastal margins are critical sites for carbon (C) sequestration, yet the mechanisms stabilizing preaged, allochthonous C (externally-derived biospheric C) in these environments remain poorly understood. Specifically, the interplay between mineral association and microbial processing represents a significant knowledge gap. Here, we investigated C sequestration mechanisms in Chinese mangrove and saltmarsh soils by analyzing topsoils and cores across 36 sites spanning a 20-degree latitudinal transect. We found that saltmarshes, characterized by high mineral accretion and lower relative autochthonous C accumulation, exhibited significantly longer soil organic C (SOC) turnover times than mangroves (topsoils: ~2200 vs. ~500 years, respectively). This difference corresponded to higher proportions of preaged (~50%) and petrogenic (rock-derived; ~20%) SOC in saltmarshes. Linear mixed-effects models (LMM) confirmed that proxies for mineral protection (e.g., Al/Si) and advanced decomposition (lignin oxidation) were robust, positive predictors of turnover time across the latitudinal gradient. Further structural equation modeling (SEM) indicated a depth-dependent shift in drivers. In surface soils, microbial necromass accumulation was a significant predictor of C turnover (coefficient = 0.36). However, at depth (1 m), the degree of lignin degradation emerged as the primary predictor of multi-millennial C persistence (coefficient = 0.45). These results suggest a joint regulation mechanism whereby microbial processing transforms organic matter into stable forms that are subsequently protected by minerals. This mechanism effectively sequesters old, allochthonous C, challenging the paradigm that blue C storage is dominated solely by recent biomass and necessitating a reevaluation of coastal C management frameworks. |
| title | Mineral Association and Microbial Processing Jointly Prolong Carbon Turnover in Coastal Wetlands. |
| topic | Wetlands Soil Microbiology Carbon Soil Carbon Sequestration Minerals China Seashore |
| url | https://pubmed.ncbi.nlm.nih.gov/41705626/ |