[Ecological Effects of Algae Blooms Cluster: The Impact on Chlorophyll and Photosynthesis of the Water Hyacinth].

The response of chlorophyll and photosynthesis of water hyacinth leaves in different concentrations of clustered algae cells was studied in the simulation experiment, and the aim was to reveal the mechanism of the death of aquatic plants during algae blooms occurred through studying the physiological changes of the macrophytes, so as to play the full function of the ecological restoration of the plants. And results showed the dissolved oxygen quickly consumed in root zone of aquatic plants after algae blooms gathered and showed the lack of oxygen (DO < 0.2 g x L(-1)); and the ORP was lower than -100 mV after 1 d, and it declined to -200 mV at the end of the experiment.

[Environmental Effects of Algae Bloom Cluster: Impact on the Floating Plant Water Hyacinth Photosynthesis].

It is an efficient and effective ecological restoration method by using the adaptability, large biomass of aquatic plants to purify the polluted water at present. However, there is a lack of systematic research on the impact on the physiological ecology of aquatic plants and its environmental effects of algae blooms cluster in summer. The aim of this paper is to reveal the mechanism of macrophytes demise in a shallow ecosystem by studying the influence on photosynthesis of water hyacinth caused by the cynaobacterial blooms gathered, and also to provide the theoretical basis for full effects of purification function of macrophytes to reduce the negative effects on the aquatic plants after algae blooms gathered during the higher temperature (not lower 25 degrees C) through simulating experiments.

[Impacts of algal blooms accumulation on physiological ecology of water hyacinth].

Blue-green algae bloom will consume plenty of dissolved oxygen in water, which affects the growth of aquatic plants. The effects of water hyacinth growth and physiological response changes under 25 degrees C, 5 different concentrations of cyanobacteria gathered were studied and which would provide a theoretical basis to mitigate adverse impacts and improve water purification effect. The results showed that water quality indexes including dissolved oxygen (DO), pH dropped in algae density below 60 g x L(-1), with the increase of algae density.

[Impacts of Eichhornia crassipes (Mart.) Solms stress on the growth characteristics, microcystins and nutrients release of Microcystis aeruginosa].

Due to the large-scale application of Eichhornia crassipes (Mart.) Solms on the bioremediation of eutrophic lake in China, the influence of growth, physiological characteristics, microcystins production and release of M. aeruginosa by E.