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題名 | Environmental Factors and the Spatial Distribution of Macrofauna in Marine Sediment Southwest of Taiwan=臺灣西南海域之底棲動物的分布與環境因子間的關係 |
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作者 | 程一駿; 蔡政翰; | 書刊名 | 臺灣水產學會刊 |
卷期 | 26:1 1999.03[民88.03] |
頁次 | 頁1-12 |
分類號 | 381.5 |
關鍵詞 | 大型底棲動物; 沈積物特性; 深度; 食物可利用度; Macrobenthos; Sediment characters; Depth; Food availability; |
語文 | 英文(English) |
中文摘要 | 在1993年3月間於臺灣西南海域中,從大陸棚到深處選擇了26個測站採集沈積物, 以便進行其底棲動物群集、細菌數量及沉積物中的化學及物理特性之分析。 沈積物主要是由細小的顆粒所組成的(平均顆粒大小介於12到139微米之間)。底棲動 物之群落以甲殼類、多毛類及有殼的軟體動物為主。每克沈積物中學含4.2×109到5.2×1010細 菌量。細菌總量約佔沈積物總有機碳動之0.05到0.1%之間。這個比例並不會隨著深度增加 而增加或減少。沈積物之碳氮比值會隨著深度增加而減少;這可能是因為有機氮中的腐植值 會隨著深度增加而增加之故。底棲動物的物種豐度會隨著深度增加而減少,這主要是因為沉 機物中的細泥含量會隨著深度而喜加而食物的可利用度會隨著深度而減少之故。 |
英文摘要 | Sediment from 26 stations of the continental shelf of the deep-sea southwest of Taiwan was sampled in March 1993. The macrofaunal assemblages, bacterial abundance and chemical and geological characters were assessed. The sediment was composed mainly of fine-grained particles (mean grain size ranged from 12to 139 μm). Macrofauna assemblages were dominated by crustaceans, polycheates, and shell-bearing mollusk. Bacterial abundances ranged from 4.2×109 to 5.2×1010 cells (g sediment)-1. Bacterial biomass contribouted from 0.05 to 1% to the total organic carbon, and no trend of increase or decrease in this value with depth was observed. The sediment C: N ratio decreased, which was due mainly to the increase in the humus fraction of sediment organic organic nitrogen. The decrease in macrofaunal richness with increasing depth might have resulted mainly from the increase in mud content and decrease of food availability with depth. |
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