Carbon cycle in shrimp polyculture mesocosm |
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| Authors: | Liu Guo-cai Li De-shang Dong Shuang-lin |
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| Institution: | (1) Aquaculture Research Laboratory, Ocean University of Qingdao, 266003 Qingdao, China;(2) Department of Biology, East China Normal University, 200062 Shanghai |
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| Abstract: | The carbon cycle in shrimp polyculture mesocosm ecosystems was studied in the shrimp farm of the Huanghai Fisheries Group
Corporation in Shandong Province from May to August, 1997. The results showed that the plankton community respiration rate
fluctuated between 0.07 and 2.28 mgC/(L·d), average of 0.82±0.42 mgC/(L·d), which was 49 percent of the rate of phytoplankton
gross production; that the average respiration rates (mgC/(L·d)) of micro-, nano- and pico-plankton were 0.07, 0.38 and 0.31,
which were 175, 30 and 207 percent of the corresponding sized phytoplankton production rates; that the sediment respiration
rate (mgC/(m2·d)) varied from 178.64 to 373.23, average of 262.60±48.68, and increased gradually with the lapse of culture time; and that
the organic carbon accumulation and the respiration in the sediment of the shrimp monoculture mesocosm was higher than that
in the polyculture mesocosms. The total sediment respiration per 25 m2 mesocosm in the culture period averaged 571.16 gC, which was 10 percent of the total organic carbon input of the mesocosm.
Project 39430102 supported by NSFC and also supported by National Climbing Program B(PD-B6-7-3). |
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| Keywords: | carbon cycle shrimp polyculture mesocosm |
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