[Changes of soil carbon, nitrogen and phosphorus and stoichiometry characteristics in marsh invaded by Spartina alterniflora].

To clarify the effect of invasive alien plants on ecosystem functions, soil total carbon (TC), total carbon (TN), and total phosphorus (TP) contents were studied in the exotic invasive plant Spartina alterniflora marsh with different durations and the native species Cyperus malaccensis marsh in the Minjiang River estuary. The results showed that there were different variations of TC, TN and TP at 0-50 cm soil layer in the C. malaccensis marsh invaded by S.

[Diurnal and seasonal variations of surface atmospheric CO2 concentration in the river estuarine marsh].

Characteristics of diurnal and seasonal variations of surface atmospheric CO2 concentration were analyzed in the Minjiang River estuarine marsh from December 2011 to November 2012. The results revealed that both the diurnal and seasonal variation of surface atmospheric CO2 concentration showed single-peak patterns, with the valley in the daytime and the peak value at night for the diurnal variations, and the maxima in winter and minima in summer for the seasonal variation. Diurnal amplitude of CO2 concentration varied from 16.

[Litter decomposition and its main affecting factors in tidal marshes of Minjiang River Estuary, East China].

By using litterbag method, this paper studied the decomposition of the leaf- and flower litters of two emergent macrophytes, native species Phragmites australis and invasive species Spartina alterniflora, and related affecting factors in the Minjiang River estuary of East China. In the decomposition process of the litters, the decay of standing litter (0-90 days) was an important period, and the loss rate of the flower- and leaf litters dry mass of P. australis and S.

[Effect of human disturbance on ecological stoichiometry characteristics of soil carbon, nitrogen and phosphorus in Minjiang River estuarine wetland].

To clarify responses of soil ecological stoichiometry in wetland to human disturbance, the ecological stoichiometry characteristics of carbon, nitrogen and phosphorus elements of soil in Phragmites australis marsh, grassland, flat breed aquatics, cropland, pond aquaculture after human disturbance and abandoned cropland after human disturbance restoration in Minjiang River estuary were analyzed. The results showed: averaged values of C/N, C/P, N/P ratios were declined as the human disturbance increment, which appeared that Phragmites australis marsh, grassland (lower human disturbance, 25.53, 156.

[Methane fluxes of Cyperus malaccensis tidal wetland in Minjiang River estuary].

By using enclosed static chamber-gas chromatograph techniques, this paper measured the methane fluxes of Cyperus malaccensis tidal wetland in Minjiang River estuary. The diurnal variation of the methane fluxes in summer and winter were in the range of 1.29-2.

Methane (CH4) emission from a tidal marsh in the Min River estuary, southeast China.

The total methane emission to the atmosphere and hydrosphere, and its seasonal variation, were estimated using an enclosed static chamber technique from a tidal marshes dominated by Phragmites australis (common reed) in the Min River estuary, southeast China. Measurements were taken at three tidal stages (before flood, during the flooding and ebbing process, and after ebb). Potential rates of methane production from the marsh sediment layers were also measured using an incubation technique.

[Seasonal dynamics of nitrogen- and phosphorus absorption efficiency of wetland plants in Minjiang River estuary].

Taking the native Phragmites australis and invasive Spartina alterniflora in Minjiang River estuary as test objectives, this paper studied the seasonal dynamics of their biomass and nitrogen- and phosphorus absorption efficiency. A typical single-peak curve was presented for the seasonal dynamics of aboveground biomass and nitrogen- and phosphorus absorption efficiency of the two species. P.