{"type": "FeatureCollection", "features": [{"id": "10.1016/j.chemosphere.2017.06.060", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:01Z", "type": "Journal Article", "created": "2017-06-15", "title": "Effects Of Short-Term Invasion Of Spartina Alterniflora And The Subsequent Restoration Of Native Mangroves On The Soil Organic Carbon, Nitrogen And Phosphorus Stock", "description": "The exotic cordgrass Spartina alterniflora has severely invaded the mangrove wetlands in southern China and ecological restoration using native mangroves was conducted in an attempt to control this invasive species. In this study, the contents and pools of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) were quantified to investigate the invasive effects of S.\u00a0alterniflora and then to evaluate whether the ecological restoration of native mangrove could reverse those effects. S.\u00a0alterniflora only showed significantly higher organic carbon content in the surface 0-10\u00a0cm of soil than in the uninvaded mudflat. The high \u03b413C values in the surface soil of the invaded habitat demonstrated that S.\u00a0alterniflora contributed 42.6-62.2% of the organic carbon. The SOC for invasive S.\u00a0alterniflora and newly restored mangroves (4 years and 14 years) was not enhanced in comparison to the unvegetated mudflat. S.\u00a0alterniflora significantly increased the surface soil TN content, but decreased the available phosphorus content and TP density. The TN densities increased gradually with the mangrove restoration, while the TP densities were only slightly influenced. The results suggested that short-term invasion of S.\u00a0alterniflora and subsequent mangrove restoration did not alter SOC or TN pool sizes, but S.\u00a0alterniflora was shown to affect the potential carbon storage capacity produced by the mangroves in the Zhangjiang Estuary.", "keywords": ["China", "Nitrogen", "Phosphorus", "15. Life on land", "Poaceae", "01 natural sciences", "Carbon", "6. 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Nitrification plays a central role in the nitrogen cycle and is often a critical first step in nitrogen removal from estuarine and coastal environments. We determined the abundance as well as composition of ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) in different soils during land reclamation process. The abundance of AOA was higher than that of AOB in farm land and wild land while AOA was not detected in tidal flats using real-time polymerase chain reaction (PCR). The different abundances of AOB and AOA were negatively correlated with the salinity. The diversities of AOB and AOA were also investigated using clone libraries by amplification of amoA gene. Among AOB, nearly all sequences belonged to the Nitrosomonas lineage in the initial land reclamation process, i.e., tidal flats, while both Nitrosomonas and Nitrosospira lineages were detected in later and transition phases of land reclamation process, farm land and wild land. The ratio of the numbers of sequences of Nitrosomonas and Nitrosospira lineages was positively correlated with the salinity and the net nitrification rate. As for AOA, there was no obvious correlation with the changes in the physicochemical properties of the soil. This study suggests that AOB may be more import than AOA with respect to influencing the different land reclamation process stages.", "keywords": ["DNA", " Bacterial", "0301 basic medicine", "China", "Conservation of Natural Resources", "Archaeal Proteins", "Molecular Sequence Data", "Genes", " Archaeal", "03 medical and health sciences", "Bacterial Proteins", "Rivers", "Ammonia", "14. Life underwater", "Phylogeny", "0303 health sciences", "Bacteria", "Biodiversity", "Nitrogen Cycle", "15. Life on land", "Archaea", "Nitrification", "6. Clean water", "DNA", " Archaeal", "Genes", " Bacterial", "13. 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