Distribution of Coccolithophorids and Coccoliths in Surface Ocean off Northeastern Taiwan

台灣東北外海表水層鈣板藻及鈣板分佈

楊天南(Tien-Nan Yang) ； 魏國彥(Kuo-Yen Wei) ； 龔國慶(Gwo-Ching Gong)

《Botanical Bulletin of Academia Sinica》 42卷4期 (2001/10) Pp. 287-302

https://doi.org/10.7016/BBAS.200110.0287

摘要

本研究量化報導黑潮與東海陸棚水圑交匯所在之台灣東北外海的表水層鈣板藻和鈣板分佈。爲減低鈣板藻數量因浮游植物日夜遷移所造成的變動影響，本研究只分析在日出時刻所採取的樣品，對於1996年夏天在六個站位採得水深2公尺的表層水樣，進行鈣板藻鑑種與計數。共計鑑定出41藻種，基中以Emiliania huxleyi(Lohmann)Hay et Mohler、Palusphaera vandelii Lecal emend.R.E.Norris、Umbellosphaera Paasche和Syracosphaera Lohmann爲優勢種類。本研究區辨認出一個鈣板藻群落：（一）陸棚群落，優勢種爲Emiliania huxleyi、Gephyrocapsa oceanica Kamptner和Calciosolenia murrayi Gran，擁有中度的生物歧異度和種均度：（二）黑潮群落，以Unbekkisogaera屬最爲優勢，並表現出最高的種歧異度和種均度：（三）西北太平洋中心區群落，種歧異度和種均度最低，優勢種屬爲Calicasphaera Kleijne及Palusphaera vandelii。每昇海水中鬆脫的鈣板數量介於10.2×10^4至22.9×10^4片，而鈣板球數則介於11.5×10^3個至193.7×10^3個細胞；其中以黑潮流徑的鈣板和鈣板球含量最高。

關鍵字

鈣板藻 ； 歧異度 ； 東海 ； 黑潮 ； 生物存量

並列摘要

This study depicts quantitatively the distribution of coccolithophorids and coccoliths during one summer season in the area off northeastern Taiwan where the Kuroshio flows northward and interacts with the shelf waters of the East China Sea. To minimize the influence of diurnal variation of coccolithophorids, only samples taken at sunrise were analyzed. Sea-surface water (2m in depth) samples were obtained at six stations during the summer of 1996. Forty-one species were identified with Emiliania huxleyi (Lohmann) Hay et Mohier, Palusphaera vandelii Lecal emend. R. E. Norris, Umbellosphaera Paasche spp. and Syracosphaera Lohmann spp. being the predominant forms. Three coccolithophorid communities were recognized: (1) the continental shelf community, dominated by Emiliania huxleyi, Gephyrocapsa ocean ica Kamptner and Calciosolenia murrayi Gran, which showed intermediate biodiversity and species evenness; (2) the Kuroshio community, which showed the highest diversity and evenness, with a flora dominated by genus Umbellosphaera Paasche; and (3) the Western North Pacific Central Water community, which had the lowest diversity and evenness, with dominant species Calicasphaera Kleijne and Palusphaera vandelii. The absolute abundance of loose coccoliths ranged from 10.2 x l0^(4) individual coccoliths 1^(-1) to 22.9 x l0^(4) individual coccoliths 1^(-1), while those of coccospheres were much less, ranging from 11.5 x l0^(3) cells 1^(-1) to 19.7 x 10 cells 1^(-1) The largest absolute abundance of coccoliths and coccospheres was found in the Kuroshio path.

並列關鍵字

Coccolithophorid ； Diversity ； East China Sea ； Kuroshio ； Standing crops