This paper reports two new species, one new variety and fourteen taxa new to China in three genera of the phytoplankton desmids from Donghu Lake, Wuhan, China.
For compilation and comparison of desmids flora, the authors restudied the species composition, cell density and biomass of phytoplankton desmids collected at six stations in Donghu Lake at intervals of three months m...For compilation and comparison of desmids flora, the authors restudied the species composition, cell density and biomass of phytoplankton desmids collected at six stations in Donghu Lake at intervals of three months monitored from March of 1956 to February of 1957. A total of 122 taxa belonging to 16 genera were identified from qualitative and quantitative samples. Species of Cosmarium were the most popular ones occupy- ing about 41 % of the total species. Based on the observations, the annual mean values of the cell density and biomass were 132.11×102 cells/L and 0.09 mg/L. Cosmarium, Staurastrum, Staurodesmus and Closterium dominated and contributed more than 70 % of the total cell density and biomass at six stations in four seasons. The maximum species number, cell density and biomass in autumn revealed that the highest variety (64 taxa, 1296×102 cells/L and 0.889 mg/L respectively) occurred at Station 3 located in the southern part of Donghu Lake. From then on to the mid 1990s the desmids community decreased sharply in Donghu Lake, resulted clearly from eutrophication in the lake.展开更多
In the photosynthetic system of the algae, although, all the speeies contain chlorophyll a, they differ greatly in the 'antenna' pigments with which the algal cells harvest light energy. Therefore, the investi...In the photosynthetic system of the algae, although, all the speeies contain chlorophyll a, they differ greatly in the 'antenna' pigments with which the algal cells harvest light energy. Therefore, the investigation of the differences between the composition of various 'antenna' pigments has become one Of the most interesting subjects with respect to the phytogenetic taxonomy and the evolution of the algae. Phycobilins are the major photosynthetie 'antenna' pigments in some algae展开更多
文摘This paper reports two new species, one new variety and fourteen taxa new to China in three genera of the phytoplankton desmids from Donghu Lake, Wuhan, China.
文摘For compilation and comparison of desmids flora, the authors restudied the species composition, cell density and biomass of phytoplankton desmids collected at six stations in Donghu Lake at intervals of three months monitored from March of 1956 to February of 1957. A total of 122 taxa belonging to 16 genera were identified from qualitative and quantitative samples. Species of Cosmarium were the most popular ones occupy- ing about 41 % of the total species. Based on the observations, the annual mean values of the cell density and biomass were 132.11×102 cells/L and 0.09 mg/L. Cosmarium, Staurastrum, Staurodesmus and Closterium dominated and contributed more than 70 % of the total cell density and biomass at six stations in four seasons. The maximum species number, cell density and biomass in autumn revealed that the highest variety (64 taxa, 1296×102 cells/L and 0.889 mg/L respectively) occurred at Station 3 located in the southern part of Donghu Lake. From then on to the mid 1990s the desmids community decreased sharply in Donghu Lake, resulted clearly from eutrophication in the lake.
文摘In the photosynthetic system of the algae, although, all the speeies contain chlorophyll a, they differ greatly in the 'antenna' pigments with which the algal cells harvest light energy. Therefore, the investigation of the differences between the composition of various 'antenna' pigments has become one Of the most interesting subjects with respect to the phytogenetic taxonomy and the evolution of the algae. Phycobilins are the major photosynthetie 'antenna' pigments in some algae
