Preliminary studies on the role of protozoa in the food web of Donghu Lake

Wu Sheng-gui; Shen Yun-fen

doi:10.1007/BF02842668

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Preliminary studies on the role of protozoa in the food web of Donghu Lake

Updated：2023-05-16

- Preliminary studies on the role of protozoa in the food web of Donghu Lake
- Journal of Oceanology and Limnology Vol. 18, Issue 3, Pages: 227-233(2000)
- Affiliations：
  
  Institute of Hydrobiology
- Author bio：
- Funds：
- DOI：10.1007/BF02842668
  CLC：
- Published：2000
- Accepted：
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Sheng-gui, W., Yun-fen, S. Preliminary studies on the role of protozoa in the food web of Donghu Lake., Chin. J. Ocean. Limnol. 18, 227–233 (2000). https://doi.org/10.1007/BF02842668
DOI：

Sheng-gui, W., Yun-fen, S. Preliminary studies on the role of protozoa in the food web of Donghu Lake., Chin. J. Ocean. Limnol. 18, 227–233 (2000). https://doi.org/10.1007/BF02842668 DOI：

摘要

Abstract

Plankton from Station I of Donghu Lake

an eutrophic lake

was divided into three groups (2–32 μm

32–112 μm and >112 μm) by filtering the water sample through 2

112 μm pores. It was supposed that the 2–32 μm Protozoa (group 1) was fed on by the 32–112 μm Protozoa and small rotifers (group 2) and >112 μm large rotifers

cladocerans and copepods (group 3). The feeding rate of zooplankton in situ was estimated by counting the protozoan individuals and also by the14C-NaHCO3 method. The P/B ratio of the small Protozoa (group 1) was 2.9 for 6 h and 1.2 for 24 h. The feeding rate of the 32–112 μm zooplankton on small Protozoa (2–32 μm) was about 2/3 the total feeding rate of zooplankton

and that of >112 μm zooplankton on the 2–32 μm Protozoa was 1/3 of the total feeding rate. The lower the density of feeders

the higher were the feeding rates. The daily production of the 2–32 μm protozoans was 1.559 mg/L

which equaled to 25% of the daily food consumption of other zooplankton. Isotope experiments showed result similar to that from the above direct counting method.

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references

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