台南青草崙兩種人工海堤之軟體動物群聚時空變化之研究

The study of mollusca community at different artificial jetty in Cingcaolun, Tainan

林劭陽(Shao-Yang Lin)

指導教授 ： 邱郁文

高雄醫學大學/生命科學院/生物醫學暨環境生物學研究所/碩士(2010年)

https://doi.org/10.6832/KMU.2010.00151

摘要

底棲附著軟體動物行動緩慢，棲息範圍較小，當環境變遷時，必需承受並反應環境壓力，所以軟體動物的群聚變動及時空變化可用來評估其棲息地空間與時間序列的環境變動。台南市青草崙地區於2007年11月設置新型生態海堤，為瞭解該海堤對海岸生態的影響，本研究對底棲軟體動物群聚時空變化進行分析，比較青草崙地區不同海堤棲地軟體動物群聚組成及時間變化。調查時間為2008年3月至2009年10月，共19個月，每個月採樣一次。樣點包括傳統消波塊海堤3個潮位及生態海堤的5個不同區域，共8個樣點。實驗初期發現生態海堤上軟體動物群聚組成與傳統消波塊低潮位物種相似，但研究過程中，生態海堤受颱風引起海象變化影響，整體結構產生變化，出現不同潮位的棲地，導致軟體動物群聚組改變。生態海堤隆起的部分出現新拓殖遷入記錄的物種，而低潮位因底質擾動過大，軟體動物不易生存。整體而言，消波塊地區的種豐富度、均勻度及歧異度均高於生態海堤。研究結果顯示，海堤穩定度是響軟體動物群聚組成的重要因子。本研究結果可供生態工程做為施工參考。

關鍵字

台南青草崙 ； 生態海堤 ； 軟體動物 ； 群聚變化

並列摘要

In the marine ecosystem, the mollusca in intertidal is one of the important parts, and they often live in a particular habitat. The mollusca is sensitive to physical and chemical factors, so they are often used to be the bio-environmental indicators. In November 2007, there was a new type eco-artificial jetty set in Cingcaolun, Tainan. For compare the biodiversity between artificial jetty and eco-artificial jetty, we surveyed the intertidal mollusca communities monthly from March 2008 to October 2009 at eight sampling sites. At first, mollusca community were similarly between eco-artificial jetty and low tidal artificial jetty. But during the period of study, eco-artificial jetty structural uplifted by storm surge, and the microhabitat compositions became more complex. As the result, there were new recorded species appeared at high tidal of the eco-artificial, but the biodiversity of low tidal reduce because of the intense substrate disturbed. In summary, the richness, evenness and diversity of artificial jetty were significant higher than eco-artificial jetty. The result showed that the stability of eco-artificial is an important factor of mollusca community. This study could be applied in sea shore habitat restoration.

並列關鍵字

Cingcaolun ； eco-artificial jetty ； mollusca community

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