碩士 / 國立中山大學 / 海洋環境及工程學系研究所 / 107 / The wetlands ecosystem plays an important role on providing us with water and human health, supporting rich biodiversity and climate change, and storing more carbon than any other ecosystem. Because of this, the wetlands ecosystem has gradually been valued. Due to the increase of economic development, the area of wetland is lost faster and faster. Kaohsiung city promoted the concept of ecological corridors in 2003, and Yuanchungan wetland park was defined as one of the “West Kaohsiung Wetland Ecological Corridors” by Kaohsiung city government. The research site of this study is located in Yuanchungan wetland park. The wetland park is a compensatory wetland ecological habitat for restoration, and is the largest wetland in wetland ecological corridors of Kaohsiung, which is located on the south side of the Dian-Boa-Chi to the sea. In this study, the sampling dates were from August 2017 to March 2018 during four seasons for five sampling points. Based on the study, it could be comprehended that the variations of season, day and night, and differences in different habitats by water quality test and meteorological data collection. Through the water quality and stat is tidal analyses from SPSS, the correlation between the emission of greenhouse gases and water quality were analyzed. According to the analytical results, water temperature, pH, and dissolved oxygen were higher during the day than the night. Electrical conductivity and salinity were shown to be highly correlated with tides variation. Phosphate nutrients have the highest concentration is summer and autumn. The reason might be because orthophosphate was less absorbed by plants in the water in summer and autumn, while the effect of tidal current on the wetland sampling point making sediment disturbed to let orthophosphate in the sediment released into the water. For nitrite and nitrate in nitrogen-abundant nutrient salt, they have a similar concentration trend in summer and autumn, both of which presented high levels in the daytime and low levels in the nighttime because ammonia nitrogen in the salt was first oxidized to nitrite before it was further nitrified on nitrate. Ammonia nitrogen exhibited the highest concentration in spring. It might be because the condition because excessive as the most optimal environment for nitrifying bacteria in the wetland existing the reduced capability to remove ammonia nitrogen resulting in such accumulation. The correlation between greenhouse gas and water quality revealed that CO2 concentration was also highly correlated to the total organic carbon and chlorophyll a. It is speculated that this is probably due to the process of photosynthesis by plants in the wetland (including aquatic and self-supporting algae). CH4 also show a strong positive relationship with nitrate and total nitrogen, suggesting that microbes will instead to turn anaerobic hydrolysis under an anaerobic environment, as nitrification can still proceed at a low oxygenated condition of 0.3 mg/L in concentration. N2O is also displaying the same strong positive correlation with nitrate and total nitrogen because of the process of denitrification.
| Identifer | oai:union.ndltd.org:TW/107NSYS5282018 |
| Date | January 2019 |
| Creators | Yung-Yu Fang, 方詠俞 |
| Contributors | Yang, Lei, 楊磊 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 153 |
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