Redundancy analysis revealing relationship between water-salinity and the eco-physiological responses of Phragmites australis in Momoge Wetland, China

F. Q. Chang, C. N. Deng, X. L. Pan

Abstract: Based on the measured data in June, 2010, the redundancy analysis (RDA) were used to analyze the variations of eco-physiological responses of Phragmites australis, identify the key environmental factors and their patterns influencing the variation of the growth of Phragmites australis in Momoge wetland, China. The results showed that various environmental factors led to great changes in eco-physiological responses of Phragmites australis. All selected environmental factors explained 59.3% of the variation of eco-physiological responses of Phragmites australis. Na+ concentration was the most important environmental factor, which possessed 62.9% of the variation, and water depth was the second key environmental factor, which possessed 25.8% of variation of Phragmites australis. Na+ influenced eco-physiological characteristics of Phragmites australis by the intergration. Water depth controlled eco-physiological characteristics of Phragmites australis by influencing the plant height, coverage, biomass and the maximum photosynthesis efficient (FV/FM). The value of pH was the last environmental factor possessing 11.8% of the variation in the total variance, and influencing the plant height and biomass. Additional research is needed to find management strategies for the restoration of Phragmites australis.

Keywords: Eco-physiological responses; Environmental factors; Momoge Wetland; Phragmites australis; Redundancy analysis

Date published: 2019-03-25