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題 名 | 南仁山古湖溼地內四節蜉蝣Cloeon marginale Hagen (Ephemeroptera: Baetidae)之稚蟲分布與其密度消長=Nymph Distribution and its Density Fluctuation of Cloeon marginale (Hagen)(Ephemeroptera: Baetidae) in Gufu Wetland at Nanjenshan Area |
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作 者 | 彭仁君; 施希健; 王建平; | 書刊名 | 中華昆蟲 |
卷 期 | 19:3 1999.09[民88.09] |
頁 次 | 頁217-227 |
分類號 | 385.734 |
關鍵詞 | 蜉蝣; 消長; 棲地; 水生昆蟲; Mayfly; Cloeon marginale; Fluctuation; Habitat; Aquatic insect; |
語 文 | 中文(Chinese) |
中文摘要 | 南仁山古湖為一沼澤濕地,李氏禾草(Leersia hexandra Sw.)常成叢生長其內之 淺水區或岸邊。本研究比較四節蜉蝣科之 Cloeon marginale Hagen 稚蟲在李氏禾植物與無 植物樣區內棲息分布的差異,以探討李氏禾植物 C. marginale 稚蟲的棲息分布與密度消長 之影響。 在古湖有李氏禾與無植物生長區域內各選定三個樣區,每一樣區以網口長 12cm、 寬 10cm 大小之細網撈取 20 次, 同時調查水質理化條件, 每月調查一次,自 1996 年 6 月至 1997 年 5 月止,共調查 1 年。 調查結果顯示,本區水域含大量之有機碎屑,其 pH 值多在 6-7 之間。在全年中,C. marginale 稚蟲密度在李氏禾樣區內皆顯著高於無植物樣 區內。兩量與稚蟲密度消長變化具有顯著之相關性,其相關係數為 -0.70。夏天雨季期間, 雖然稚蟲密度呈現明顯較低水平,但在李氏禾樣區內仍較無植物樣區內有較高之個體數;從 10 月末雨季漸結束至 12 月期間,其稚蟲密度則明顯上升至高峰期; 但冬季低溫期間其密 度卻出現明顯的低峰。李氏李水中生長之根莖部提供 C. marginale 稚蟲良好的生長棲息所 , 附著在植株上的有機物與藻類為其食物重要來源, 同時, 密集叢生的李氏禾使 C. marginale 得以躲避敵害並減低雨季流水之衝擊影響。 |
英文摘要 | Gu-fu wetland is an ecological protection area in the Kenting national park of Taiwan. Most of the weed, Leersia hexandra Sw., grows at the shallow water and shore area. We investigated the nymph distribution of Cloeon marginale Hagen in the area with L. hexandra and the non-plant area to study the influence of the weed on the distribution and density fluctuation of the mayfly. The nymphs of C. marginale were sampled monthly from June 1997 to May 1998 with fine net in the area growing with L. hexandra and the non-plant area, separately. The water quality was investigated at the mean time. The data shows that, the water was acid ant the organic detritus was high. The nymph density of C. marginale in the area with L. hexandra was significantly higher than that in the non-plant area during the whole year. The correlation coefficient between rainfall and the nymph density was -0.70. The nymph density maintained at a low level in the summer rainy season, however the nymph density was still higher in the area with L. hexandra. The nymph density increased from October to the climax in December. Later, the nymph density dropped distinctly as the temperature declined to a relatively lower level. In conclusion, as the mayfly mymphs can live on the plant in water, feed on the organic materials and algae on it, use the plant as a refuge from predation and the impact of flood, the weed, L. hexandra, is an important habitat for C. marginale. |
本系統中英文摘要資訊取自各篇刊載內容。