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題 名 | 水生植物與藻類對人工溼地中氮磷去除率之影響=Effects of Macrophyte and Algae on the Removal Capacity of Nitrogen and Phosphorus in the Constructed Wetlands |
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作 者 | 曾祥霖; 蕭淑娟; 張睿昇; 楊磊; 林幸助; | 書刊名 | 濕地學刊 |
卷 期 | 1:2 2012.07[民101.07] |
頁 次 | 頁11-33 |
分類號 | 379.2、379.2 |
關鍵詞 | 人工溼地; 植群結構; 藻類生物量; 營養鹽去除率; Constructed wetland; Vegetation composition; Algae biomass; Nutrient removal rate; |
語 文 | 中文(Chinese) |
中文摘要 | 濕地中的水生植物與藻類具有淨化水質能力,同時也是人工濕地不可或缺的一部分。本研究以水生植物覆蓋度、藻類生物量的時空變化探討水生植物對大漢溪三座人工濕地系統(打鳥埤、新海二期與新海三期)的各淨水單元營養鹽([NO2 +NO3]-N、NH3-N與PO4-P)去除率之影響。經現地調查可將人工濕地的水生植物群集依生長型態區分為挺水植物、漂浮植物、蔓性植物與浮葉植物四種類型。四種類型植群的覆蓋度變化幅度依序為漂浮植物、蔓性植物、挺水植物、浮葉植物。植群覆蓋度變化呈現冬季低夏季高的趨勢。浮游藻生物量的變化趨勢與植物覆蓋度相似,而底棲藻生物量則呈現冬高夏低的趨勢。[NO2+NO3]-N去除率呈現夏高冬低的趨勢;夏季去除率最高達93.75%,在其他季節則無去除效果。多數淨水單元的NH3-N去除率在春季最高(87.19%),而夏季有下降的趨勢。PO4-P去除率在夏季有下降趨勢,但其他季節無顯著變化。Spearman’s等級相關分析顯示多數淨水單元的營養鹽去除率與水生植物覆蓋度變化及藻類生物量無顯著相關,顯示還有其他因素會影響濕地的營養鹽去除率。 |
英文摘要 | In wetlands, aquatic plants and algae can improve water quality, and they are also important for constructed wetlands. In this study, we would like to know what effects of the temporal-spatial dynamics of aquatic plants and algae on the nutrient (i.e. [NO2+NO3]-N, NH3-N and PO4-P) removal rates of constructed wetlands. We surveyed the vegetation coverage and algae biomass (i.e. phytoplankton and benthic algae) in three constructed wetlands (i.e. Da-Niao-Pi, Hsing-Hai Bridge II and Hsing-Hai Bridge III) at the Da-Han River. According to the growth forms, we classified four types of aquatic plants, including emergent plants, vines, free-floating plants and leaf-floating plants. The free-floating plants showed the highest magnitude of coverage changes, and the emergent and leaf-floating plants the lowest. The vegetation coverages were higher in summer and lower in winter. The dynamic of phytoplankton biomass was similar to the vegetation coverage. The biomass of benthic algae was higher in winter and lower in summer. The [NO2+NO3]-N removal rate of the treatment units showed a trend that was lower in winter and higher in summer (93.75%). The removal rate of NH3-N was the highest in spring (87.19%), but decreased in summer. The removal rate of PO4-P decreased in summer, but showed no significant difference in the other seasons. In most units of the constructed wetlands, the correlations between the coverage changes of vegetations and the nutrient removal rates were not significant, neither were those between the biomass of algae and the nutrient removal rates. However we found that the removal rates increased during the growth season of the plants and algae. The nutrient removal rate was affected by many biotic and abiotic factors, which might affect our over-all result on nutrient removal rate. |
本系統中英文摘要資訊取自各篇刊載內容。