Time series variation of plankton in a remote industrial island, Taiwan Strait, southwestern Taiwan
(2.Department of Aquaculture, Pingtung University of Science and Technology, Pingtung, Taiwan 91201)
【Abstract】Eighteen years of monitoring data at four sections along the coastline of Taisi Township, Yunlin County, between 1993 and 2010 were used to investigate the effects of power plant on plankton abundance. Sampling was conducted at depths of 10 m and 20 m in each section. Among the four seasons, the fourth quarter (October to December) had the lowest average abundance of plankton over the years. However, the peak abundance of different types of plankton occurred in different seasons. Zooplankton had the highest abundance during the 1st and 2nd quarters (January to June) while phytoplankton, shrimp larvae and crab larvae had the greatest abundance in the 2nd quarter (April to June) and the peak in fish egg and fish larvae occurred from the 1st to the 3rd quarter (January to September). Cumulative data from 18 years shows that the pH of SEC5 often droped below 7.8 since the 3rd quarter of 2000. pH value lower than 7.8 were frequently measured in the stations of section 5. Each time the pH value is under 7.8, the quantities of zooplankton (75 ± 69 ind./m3), phytoplankton [(1.60 ± 2.28) × 103 cell/L], shrimp larvae (2.4 ± 5.8 ind./m3), crab larvae (1.9 ± 5.0 ind./m3), fish egg (0.88 ± 1.10 ind./m3), and fish larvae (0.16 ± 0.32 ind./m3) showed significant low values (only the half of the total average). Accordingly, we strongly suggest that the warm water effluents discharging from a power plant should maintain the pH above 7.8 in the coastal waters to reduce the negative impact on the marine plankton diversity and abundance.
【Keywords】 pH; plankton; Yunlin coast; ocean acidification; flue gas desulphurization (FGD);
Chu XF, Tian JR, Ma LK, Shi GL (2008). Impact of warm effluent from seawater flue gas desulphurization system on sea area environment. China Water & Wastewater, 24 (14), 102–105 (in Chinese with English abstract).
Dixson DL, Munday PL, Jones GP (2010). Ocean acidification disrupts the innate ability of fish to detect predator olfactory cues. Ecology Letters, 13, 68–75.
Hall–Spencer JM, Rodolfo–Metalpa R, Martin S, Ransome EFine M, Turner SM, Rowley SJ, Tedesco D, Buia MC (2008). Volcanic carbon dioxide vents show ecosystem effects of ocean acidification. Nature, 454, 96–99.
Havenhand JN, Buttler FR, Thorndyke MC, Williamson JE (2008). Near-future levels of ocean acidification reduce fertilization success in a sea urchin. Current Biology, 18651–18652.
Munday PL, Dixson DL, Donelson JM, Jones GP, Pratchett MS, Devitsina GV, Doving KB (2009). Ocean acidification impairs olfactory discrimination and homing ability of a marine fish. Proceedings of the National Academy of Sciences USA, 106, 1848–1852.
Song XD(2000)On the influence of FLAKE–HYDRO FGDtechnology upon marine environment.Journal of Shandong College of Electric Power, 3 (3), 44–48 (in Chinese with English abstract).
Yamada Y, Ikeda T (1999). Acute toxicity of lowered pH to some oceanic zooplankton. Plankton Biology and Ecology, 46, 62–67.
Vol 24, No. 07, Pages 748-756