Yan Ge, Ge Zhen-Ming, Zhang Li-Quan
Ying Yong Sheng Tai Xue Bao. 2014 Jan;25(1):85-91.
Abstract: The high productivity of saltmarsh vegetation in coastal wetlands plays an important role on the formation of soil carbon pool. This paper studied the biomass difference, the spatiotemporal dynamics and vertical distribution of soil carbon storage in three dominant saltmarsh plant communities, i. e., Phragmites australis, Spartina alterniflora and Scirpus mariqueter in the Chongming Dongtan wetland, in the Yangtze Estuary. The results indicated that the gross biomass in the three saltmarsh plant communities was in the order of S. alterniflora (5750.7 g x m(-2)) > P. australis (4655.1 g x m(-2)) > S. mariqueter (812.7 g x m(-2)). The aboveground biomass was the highest in summer and autumn, and the underground biomass was the highest in winter. The soil carbon storage (0-50 cm) was the lowest in spring, gradually increased, and was the highest in winter. The annual increment of soil carbon storage decreased from the high tidal zone to the low tidal zone, and was in the order of P. australis community (711. 8 g x m(-2)) > S. alterniflora community (646.2 g x m(-2)) > S. mariqueter community (185.3 g x m(-2)) > bare mudflat (65.6 g x m(-2)). The highest value was in the 25-30 cm, 10-15 cm, 30-35 cm and 30-40 cm soil layers for bare mudflat and the S. mariqueter, S. alterniflora and P. australis communities, respectively. There was a significant linear relationship between the soil carbon storage and the underground biomass in the different saltmarsh communities.
滨海湿地盐沼植被的高生产力对土壤碳库的形成具有重要作用。本文研究了长江口崇明东滩湿地三种优势盐沼植物群落，即芦苇、互花米草和海三棱藨草的生物量差异、土壤碳储量的时空动态及垂直分布。结果表明，三种盐沼植物群落的总生物量大小顺序为：互花米草（5750.7 g·m⁻²）＞芦苇（4655.1 g·m⁻²）＞海三棱藨草（812.7 g·m⁻²）。地上生物量在夏季和秋季最高，地下生物量在冬季最高。土壤碳储量（0 - 50 cm）在春季最低，随后逐渐增加，在冬季最高。土壤碳储量的年增量从高潮带向低潮带递减，顺序为：芦苇群落（711.8 g·m⁻²）＞互花米草群落（646.2 g·m⁻²）＞海三棱藨草群落（185.3 g·m⁻²）＞光滩（65.6 g·m⁻²）。光滩以及海三棱藨草、互花米草和芦苇群落土壤碳储量最高值分别出现在25 - 30 cm、10 - 15 cm、30 - 35 cm和30 - 40 cm土层。不同盐沼群落的土壤碳储量与地下生物量之间存在显著的线性关系。
