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題名 | The Distribution of Gracilaria tenuistipitata var. liue at the Estuary of Tansui River and its Casual Relation to Salinity Tolerance and Character of Substratum=細基龍鬚菜在淡水河口分佈與其耐鹽度性及河口底質之關係 |
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作 者 | 張忠信; | 書刊名 | 臺灣水產學會刊 |
卷期 | 18:2 1991.06[民80.06] |
頁次 | 頁89-96 |
分類號 | 439.63 |
關鍵詞 | 分佈; 底質; 河口; 耐鹽度; 淡水河口; 細基龍鬚菜; |
語文 | 英文(English) |
中文摘要 | 沿淡水河口進行生態調查中,發現一種紅藻細基龍鬚菜Gracilaria tenuistipitata var. liue地理分布非常狹小。以其耐鹽性加以探討:發現在鹽度5-35?範圍內其對營養鹽之吸收、光合作用、藻體之生長及囊果之形成及隨後果孢子之發芽與發育等幾乎皆可進行。然而在全海水(35?)中則其囊果無法形成,此可能為其在臨近開放沿岸水域沒有分布之主因。至於其在河口域多處亦未見分布則可能歸因於缺少適當的底質。 |
英文摘要 | In an ecological survey along the estuary of Tansui river, an predominant red alga, Gracilaria tenuistipitata var. lieu was distributed in a somewhat narrow geographic range as compared to its salinity tolerance. The salinity tolerance test included measures of nutrient absorption, photosynthesis, growth and cystocarp formation of algal frond and the subsequent germination and development of carpospore in a salinity range of 5-35?. Almost all the above measures exhibited positive performance in the tested range, confirming the euryhalinity of the study species. The incapability of cystocarp formation at 35?, however, was suspected to be critical in limiting the distribution of the species studied from a vicinal open coastal water, whilst the non-distribution of the study species in most of the esturine area is mainly ascribed to the lack of suitable substratum. |
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