title: [Dynamics of carbon, nitrogen and phosphorus storage of three dominant marsh plants in Hangzhou Bay coastal wetland].
abstract: Salt marshes perform important ecosystem functions in carbon, nitrogen and phosphorus recycling. The plant biomass, content and pools of C, N and P were measured seasonally in three marsh species Phragmites australis, Spartina alterniflora and Scirpus mariquezer in Hangzhou Bay coastal wetland for the dynamics of C, N and P storage. The results showed that seasonal variation of aboveground biomass displayed a unimodal curve. The seasonal variability of plant OC content in the aboveground part of the plants was not significant, while the TN and TP content decreased significantly from spring to winter. The seasonal variability of plant C, N and P pools was significant. And there was a significant relationship between plant C/N/P pools and biomass. The pools among plant species were significantly different. S. mariqueter had the lowest C/N/P pools. TN pool in the aboveground part of P. australis was higher than that of S. aterniflora, but its TP pool was lower than that of S. alterniflora, and there was no significant difference for OC pools between P. australis and S. alterniflora. C fixation of the three marsh species was 380%, 376% and 55.5% of the average C fixation of terrestrial vegetations in China, and 463%, 458% and 67.7% of the average C fixation of terrestrial vegetations of the world. Considering the purification capacity of N and P, July would be the best harvest time of the study area for three plants. And the harvest of S. alterniflora could remove the biggest amount of P, since P was a limiting nutrient for phytoplankton growth. In conclusion, the marsh plants had strong C fixation and N/P purification ability.
authors.affiliation: Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Wetland Ecosystem Research Station of Hangzhou Bay, State Forestry Administration, Fuyang 311400, China. shaoxuexin@126.com
authors.forename: Xue-xin
authors.initials: XX
authors.lastname: Shao
authors.forename: Wen-hua
authors.initials: WH
authors.lastname: Li
authors.forename: Ming
authors.initials: M
authors.lastname: Wu
authors.forename: Wen-ying
authors.initials: WY
authors.lastname: Yang
authors.forename: Ke-yi
authors.initials: KY
authors.lastname: Jiang
authors.forename: Xiao-qi
authors.initials: XQ
authors.lastname: Ye
mesh_terms: D061006:Bays; D018533:Biomass; D002244:Carbon / Q000032:analysis*; D002681:China; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D006109:Poaceae / Q000737:chemistry / Q000378:metabolism*; D012621:Seasons; D053833:Wetlands
chemical_list: D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen