Variation of Environmental Factors and Dominant Population Succession of Microalgae Planktonic in Closed Shrimp Pond

doi:10.14088/j.cnki.issn0439-8114.2018.11.006

Abstract

Abstract: In order to investigate the influence of closed type changes of water quality in shrimp pond environmental factors season on the community structure of planktonic microalgae, test the isolated experiments of pond water temperature,pH,total nitrogen （TN）,total phosphorus（TP） and the content of chlorophyll a,and analyse the the same period in water transformation of planktonic microalgae community structure and advantage to explain in foreign sources under the condition of no interference on microalgae community changes in response to environmental factors. The results show：pond water temperature and TP content from April to the end of September increased gradually, declined in October. pH value changed first down, then up. The total nitrogen （TN） and the content of chlorophyll a from the beginning of December has been on the rise after the fall. The advantage of microalgae breeding in early succession are Cyclotella sp.,Navicula sp.,Oocystis borgei and S.quadricauda,and Chlamydomonas sp.,Chlorella sp.,S.quadricauda,Golenkinia radiata and Pseudanabeanain in medium-term, and Microcystis,Pseudanabeana,Chlorella sp. and S.quadricaudain the later period,and Microcystis,Pseudanabeana,Oscillatoria sp.and Chlorella sp. in the late,and Chlorella sp.,Golenkinia radiate,S.quadricauda in the late. The change of population succession and environmental factors closely related to the advantages of microalgae in low temperature,nitrogen and phosphorus are low and high N/P and early water salinity in diatoms and green algae;with the rise of temperature,water desalination and total nitrogen and phosphorus accumulation in algae is the dominant species of high temperature and rich;the nutrition condition of the late strong cyanobacteria became the dominant species,which has its high temperature and algae pollution resistant; late by cyanobacteria is the absolute advantage,the temperature decreased to chlorophyta was the dominant species of planktonic microalgae biomass pool decreased.

Key words: closed ponds, environmental factors, microalgae, population, succession

CLC Number:

CHEN Jia-xiong, LI Wei-bin, CHEN Wei-zhou, MA Qing-tao, CHEN Kai-liang. Variation of Environmental Factors and Dominant Population Succession of Microalgae Planktonic in Closed Shrimp Pond[J]. HUBEI AGRICULTURAL SCIENCES, 2018, 57(11): 29-31.

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