Gauss distribution function was utilized to describe the distribution of the mean percentage of the equivalent spherical diameter (BSD) of marine phytoplankton.
Seasonal variations of photosynthetic parameters of marine phytoplankton were analyzed in combination with the determination of cell chla and carbon content.
As an important parameter to be considered in biochemical processes of marine phytoplankton, cell size plays a decisive role in the physiological processes of phytoplankton.
Species identification and quantitative analysis of marine phytoplankton,the primary producer in marine ecosystem,is a basic and necessary work in many research and application fields of marine science.
In common carp, silver carp and big-headed fingerlings ponds, when water temperature was 15~17癈, supersaturated Do were decreased by 56.84%, NRj桸 by 51.28%, plant plankton biomass were lessened by 27.64% from 890.92mg/L to 644.66mg/L in three days.
Compared with control groups, Do was increased by 26.17%, 49.54% and 34.86%, NRp-N was decreased by 32.73%, 60.00% and 52.00%, plant plankton biomass by 4.04%, 23.32% and 10.89% in ^.
Correlation analysis indicates that while water temperature, salinity, nutrients, N, P, and Si all have an obvious influence on the plant plankton in their composition and quantity variations, they have little influence of the zooplankton;
N is the restrictive factor for plant plankton in this ecosystem, P is restrictive only in the deeper waters with coral reef growth zones, Si is relatively abundant.
We analysed aquatic creature condition and waer quality of ChaiHe reservoir of TieLing City on the basis of monitoring data of aquatic creature, plant plankton and total count of bacteria colonies of ChaiHe reservoir, and put forward pollution control measurses.
Phytoplankton community structure in the Guangzhou Sea was investigated from May 2003 to May 2004. The results show that there were 209 species in total, representing 89 genera.
The results indicated that zoo-plarkton biomass, phytoplankton biomass, chlorophyll-a concentration and gross primary production were reduced by 58.7%, 63.6%, 52.5%, and 65.0% respectively, water transparency and Shannon-Weiner's diversity index of phytoplankton community were increased by 18.2% and 32.5%, when silver carp were stocked in the enclosures.
Iron, which could help phytoplankton grow rapidly, is a micronutrient essential to the synthesis of enzymes required for photosynthesis in the oceanic environment.
A method involving gradient elution and operating at 15°C is proposed for the separation of several polar and non-polar mono- and divinyl chlorophylls from etiolated tissues of higher plants and from marine phytoplankton.
The structural complexity of the phytoplankton community was evaluated using the index of cenotic significance (ICS) and derivative calculation coefficients.
The species and size structure of the phytoplankton community was found to have changed significantly and the community biomass, to have increased in the course of long-term succession.