碩士 / 國立成功大學 / 海洋科技與事務研究所 / 102 / In recent years, wetland conservation appeal had not been interrupted in the world. Oyster farming areas are widely distributed and overlapped with coastal wetland in the western coastal of Taiwan. However, coastal development affected some oyster farming areas or national wetlands by river born polluted water with heavy metals. The oyster farming in the coastal of Hsinchu Siangshan is one of the important cases. The heavy metal pollution impacts the oyster farming in Hsinchu Siangshan that the cultured oyster is out of use. It's not only affecting the livelihood of local fishermen, but also the wetland ecosystem service. The strategy of Hsinchu City Government is prohibiting any oyster farming activity by establishing Hsinchu City Coastal Wildlife Refuge. However, the ecological balance of the environment at Hsinchu Siangshan wetland has been broken, the policy of the restoration achieve is worth exploring.
In the case of Hsinchu City Coastal Wildlife Refuge, this study suggested to use oysters as a tool of natural recovery by literature review and case studies. Assessment of the effectiveness of the natural recovery by oysters was also discussed. We suggested that it may have an opportunity to purify the polluted water by restrictive oyster farming, but not for selling as food at all. Through the literature review and case analysis, we found that the uptake rate constants estimated for copper and arsenic are about 446~1066(1/day) and 3.21~4.63(1/day), respectively. Based on the predicted uptake rate constants, the accumulative amounts of heavy metal in oyster cultured for one year could reach 512~1201 (mg/kg) of copper and 2.21~3.97 (mg/kg) of arsenic. Oyster production in Hsinchu Siangshan were 45 tons in 1995 but sharply decreased to 6 tons in 2010. After preliminary calculations, the accumulative amounts of copper and arsenic in oyster are about 23,040~54,045(g) and 99.4~178.65(g), respectively in 1995, but they could be 3,072~7,206(g) and 13.26~23.82(g) in 2010.
This study provided a framework for wetland restoration by oyster farming at Hsinchu Coastal Wildlife Refuge and providing a solution by searching literature and assessment of oyster farming. The government should invest about 11 million per year to purchase the imitatively farmed oyster. It could be the way to recover both the polluted wetland and faded oyster farming fisheries.
| Identifer | oai:union.ndltd.org:TW/102NCKU0274001 |
| Date | January 2013 |
| Creators | Po-Cheng Kung, 龔柏蓁 |
| Contributors | 張懿 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 49 |
Page generated in 0.0136 seconds