Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas
Abstract Background Unvegetated tidal flats of mangrove ecosystems in estuarine and non-estuarine areas play a crucial role in the coastal blue carbon sinks and biogeochemical cycle. However, there is still a lack of comprehensive understanding of the differences in soil organic carbon (SOC) content...
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SpringerOpen
2025-02-01
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| Series: | Ecological Processes |
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| Online Access: | https://doi.org/10.1186/s13717-025-00581-5 |
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| author | Ting Wu Jia Guo Gang Li Yu Jin Wei Zhao Guangxuan Lin Fang-Li Luo Yaojun Zhu Yifei Jia Li Wen |
| author_facet | Ting Wu Jia Guo Gang Li Yu Jin Wei Zhao Guangxuan Lin Fang-Li Luo Yaojun Zhu Yifei Jia Li Wen |
| author_sort | Ting Wu |
| collection | DOAJ |
| description | Abstract Background Unvegetated tidal flats of mangrove ecosystems in estuarine and non-estuarine areas play a crucial role in the coastal blue carbon sinks and biogeochemical cycle. However, there is still a lack of comprehensive understanding of the differences in soil organic carbon (SOC) contents in mangrove tidal flats between estuarine and non-estuarine areas, as well as their influencing factors. Methods In this study, soil samples were collected from estuarine and non-estuarine mangrove tidal flats in the Leizhou Peninsula. We compared the SOC and soil physicochemical properties between estuarine and non-estuarine mangrove tidal flats. The Random Forest algorithm was employed to identify the main influencing factors affecting SOC. The direct and indirect effects of the main influencing factors on SOC were studied using partial least squares structural equation modeling. Results SOC, total nitrogen (TN), total phosphorus (TP), available potassium (AK), clay, silt, aluminum (Al), lithium (Li), boron (B), molybdenum (Mo), and cadmium (Cd) contents in the estuarine areas were significantly higher than those in the non-estuarine areas of the mangrove tidal flats. The soil particle size (clay, silt, and sand), soil nutrient (TN and TP), and soil metal elements (Al, Mo, and Cd) were the main influencing factors of the SOC contents in the estuarine and non-estuarine mangrove tidal flat areas. Soil particle size (clay, silt, and sand) indirectly positively influenced SOC contents by positively influencing soil nutrient (TN and TP). Conclusions Our findings indicate that estuarine tidal flats have higher capacity of SOC sequestration compared with non-estuarine tidal flats. The main cause is that soil particle size has the potential to significantly increase SOC content by increasing soil nutrients, while metal elements have a direct influence on SOC content. The findings of the present study highlight an important mechanism that influences SOC contents in estuarine and non-estuarine mangrove tidal flats. |
| format | Article |
| id | doaj-art-18985bc13b2144e58eed5ae6e93b633d |
| institution | Kabale University |
| issn | 2192-1709 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Ecological Processes |
| spelling | doaj-art-18985bc13b2144e58eed5ae6e93b633d2025-02-09T12:12:38ZengSpringerOpenEcological Processes2192-17092025-02-0114111110.1186/s13717-025-00581-5Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areasTing Wu0Jia Guo1Gang Li2Yu Jin3Wei Zhao4Guangxuan Lin5Fang-Li Luo6Yaojun Zhu7Yifei Jia8Li Wen9School of Ecology and Nature Conservation, Beijing Forestry UniversityInstitute of Ecological Conservation and Restoration, Research Institute of Wetland, Chinese Academy of ForestrySchool of Architecture and Planning, Anhui Jianzhu UniversitySchool of Ecology and Nature Conservation, Beijing Forestry UniversitySchool of Ecology and Nature Conservation, Beijing Forestry UniversityZhanjiang National Research Station for Mangrove Wetland EcosystemSchool of Ecology and Nature Conservation, Beijing Forestry UniversityInstitute of Ecological Conservation and Restoration, Research Institute of Wetland, Chinese Academy of ForestrySchool of Ecology and Nature Conservation, Beijing Forestry UniversityScience and Insights Division, Department of Climate Change, Energy, The Environment and WaterAbstract Background Unvegetated tidal flats of mangrove ecosystems in estuarine and non-estuarine areas play a crucial role in the coastal blue carbon sinks and biogeochemical cycle. However, there is still a lack of comprehensive understanding of the differences in soil organic carbon (SOC) contents in mangrove tidal flats between estuarine and non-estuarine areas, as well as their influencing factors. Methods In this study, soil samples were collected from estuarine and non-estuarine mangrove tidal flats in the Leizhou Peninsula. We compared the SOC and soil physicochemical properties between estuarine and non-estuarine mangrove tidal flats. The Random Forest algorithm was employed to identify the main influencing factors affecting SOC. The direct and indirect effects of the main influencing factors on SOC were studied using partial least squares structural equation modeling. Results SOC, total nitrogen (TN), total phosphorus (TP), available potassium (AK), clay, silt, aluminum (Al), lithium (Li), boron (B), molybdenum (Mo), and cadmium (Cd) contents in the estuarine areas were significantly higher than those in the non-estuarine areas of the mangrove tidal flats. The soil particle size (clay, silt, and sand), soil nutrient (TN and TP), and soil metal elements (Al, Mo, and Cd) were the main influencing factors of the SOC contents in the estuarine and non-estuarine mangrove tidal flat areas. Soil particle size (clay, silt, and sand) indirectly positively influenced SOC contents by positively influencing soil nutrient (TN and TP). Conclusions Our findings indicate that estuarine tidal flats have higher capacity of SOC sequestration compared with non-estuarine tidal flats. The main cause is that soil particle size has the potential to significantly increase SOC content by increasing soil nutrients, while metal elements have a direct influence on SOC content. The findings of the present study highlight an important mechanism that influences SOC contents in estuarine and non-estuarine mangrove tidal flats.https://doi.org/10.1186/s13717-025-00581-5EstuaryMangroveSoil organic carbonSoil propertyTidal flat |
| spellingShingle | Ting Wu Jia Guo Gang Li Yu Jin Wei Zhao Guangxuan Lin Fang-Li Luo Yaojun Zhu Yifei Jia Li Wen Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas Ecological Processes Estuary Mangrove Soil organic carbon Soil property Tidal flat |
| title | Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas |
| title_full | Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas |
| title_fullStr | Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas |
| title_full_unstemmed | Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas |
| title_short | Soil organic carbon contents and their major influencing factors in mangrove tidal flats: a comparison between estuarine and non-estuarine areas |
| title_sort | soil organic carbon contents and their major influencing factors in mangrove tidal flats a comparison between estuarine and non estuarine areas |
| topic | Estuary Mangrove Soil organic carbon Soil property Tidal flat |
| url | https://doi.org/10.1186/s13717-025-00581-5 |
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