海底漫遊:賞海的季節-海藻生長季節

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Uploaded by on Dec 24, 2007

水溫愈低,對海藻的生長越有利。茂密的海藻將藍色的海洋,變成綠悠悠一片,別有一番景象!嚴格來說,海藻並不算是植物,因為海藻並沒有真正的葉、莖和根部,不同於陸地植物­,各部份有不同功能,但海藻所有細胞都可以進行光合作用;海藻的假根純粹令海藻可以固定落來,並非用來吸收養份;而有你會看到海藻上有一粒粒好似果子的果東西,其實是氣囊­,令海藻可以貼近水面漂浮,吸收更陽光,來進行光合作用。冬季裡茂盛的海藻林,為海洋生物提,尤其是在夏天出世的小生物,提供庇護和食物。

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