For the multi-input (the feedback of phytoplankton quantity and marine environmental factors ) and single-output ( the quantity of phytoplankton ) system, the method of digital time-series analysis is used to form linear dynamic models that may approximately estimate the variation of phytoplankton quantity in centra South China Sea.
Supported by GIS and SPSS,the horizontal distribution of phytoplankton quantity and its correlation with water nutrients during highstand and lowstand seasons in culturing waters of Kaozhou Bay were studied with data interpolation,correlation analysis and regression analysis methods.
The results showed that during the highstand,the distribution of phytoplankton quantity was even with the dense area locating in the estuary of Jilong River,while during the lowstand,it varied greatly with the dense area occurring in the waters from the mouth of the bay to the north of Yanzhou Island,which showed an increasing tendency from the northwest to the mouth of the bay.
The plankton constitution of Fudiyingzi Reservoir was investigated in Autumn 2003.There are 92 species of which 44 is phytoplankton and 44 is zooplankton. The amount of phytoplankton is 19 98×10 5 ind.
The plankton constitution of Qingken Lake was investigated in 2004.There are 113 species of which 63 is phytoplankton and 50 is zooplankton. The amount of phytoplankton is 237.28×10 4ind. /l which reflects in the biomass of 2.500mg/l,and the amount of zooplankton is 5505.4ind.
6 days after the experiment, its dominant index dropped to 17.6%. Meanwhile the dominant index of Asterionella japonics Cleve rose from 7.1% to 39.2%, it became the first dominant species. 45 d after the experiment, the amount of phytoplankton in the Aoshan Bay was 5.15 to 137.32 times more than that in 1997.
In June 1999,the chemical adjustment and control experiment were engaged in the Aoshan Bay. Following tracing investigations were carried out before the experiment and on the 1st,2nd,4th,5th,6th and 45th day after the experiment. While the variance of amount of phytoplankton, the replacement of superior species and the species composition of phytoplankton were researched.
/L,The scenedesmus take the main part of 69.63% in 244.62×104ind. /L. The biomass of phytoplankton can reach 3.88mg/L in which Diatom occupied the majority proportion in 3.11mg/L.
The second experiment (treatments C, D, E) differed in the phytoplankton quantity used (20?times higher): treatment C was analogous to A and treatments D and E to B.
There was a linear increase in the amount of phytoplankton grazed with an increase in phytoplankton concentration up to four times ambient phytoplankton levels.
Their gut pigment concentrations were higher (mean 0.52 ± 0.15μg chla g-1 amphipod) than those of large amphipods (mean 0.33±0.14μg g-1); this implies that the amphipods fed on a large amount of phytoplankton during the early stage of life.
Sustained cultivation of suspended mussels in the lagoon suggests that these heterotrophic protists could be an important source of food for the mussels, supplementing the small amount of phytoplankton present.
The fluctuation of specific enzymatic activity was affected by algal species rather than by the concentration of external phosphorus and amount of phytoplankton.
There are 93 species of phytoplankton in the Yellow Sea.Among them,85 species are Baoillariophyta,2 of them are variety,2 of them are deform;and 7 species are Pyrophyta,one species is Chrysophyta.The cell number and species of Bacillariophyta account for an absolute predominance.The peaks of phytop- lankton appeared in February-April and August-October,and its minimum during the periods of December-January and June-July.The plane distribution of ph- ytoplankton in the Yellow Sea isn't well-distributed as th...
For the multi-input (the feedback of phytoplankton quantity and marine environmental factors ) and single-output ( the quantity of phytoplankton ) system, the method of digital time-series analysis is used to form linear dynamic models that may approximately estimate the variation of phytoplankton quantity in centra South China Sea.Model l: y(t + l)=1.281 + 1.688y(t) + 3.023u1(t)+4.006u2(t)Model 2:y(t+1)=5.553+1.975y(t)+3.079u1(t)+5.217u2(t)+3.721u3(t)+13.133u3(t-1)+7.088u4(t)+9.905u4(t-1)In these models, y...
The geochemistry process of inorganic nitrogen in seawa ter of west area of the Xiamen Harbour throughout 1987 was reported in this paper.The result It is revealed that the concentration of inorganic nitrogen in seawater of the area was high,averaging 14.53***********umol/L.The horizontal distribution of inorganic nitrogen was higher inside the harbour than outside the harbour in Summer,Fall and Winter,which was reversed in Spring due to the amounts of plankton reproduced that season which consumed conlarge...
浮游植物数量
phytoplankton quantity
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