MODERN COCCOLITHOPHORIDAE OF ATLANTIC OCEAN .I. PLACOLITHS AND CYRTOLITHS
MODERN COCCOLITHOPHORIDAE OF ATLANTIC OCEAN .I. PLACOLITHS AND CYRTOLITHS
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DOI：
10.1016/0011-7471(67)90065-4
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发表时间：
1967-01-01
期刊：
影响因子：
--
通讯作者：
BE, AWH
中科院分区：
文献类型：
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作者：
MCINTYRE, A;BE, AWH
尽管生活在大西洋的颗石藻科有超过 70 种，但其中只有大约 16 种有足够的化石记录，主要是板石，其次是环石。从表面沉积物和浮游生物样本确定的生物地理范围表明，生物物种的分布范围比海洋沉积物中保存的生物物种的分布范围稍宽。这是由于自末次冰河时代以来大西洋迅速变暖所致。物种分布由暖水物种极限等温线向极地的最大位置和冷水物种限制等温线向赤道的最大位置来描绘。死后因洋流而扩散到目前边界之外的情况可以忽略不计。基于巡航数据和百慕大每月一次采样的温度研究使作者能够确定每个物种的最高和最佳温度范围。大多数是亚热带形式。少数是窄温的，例如伞形球菌（21°-28°C）和远洋颗石藻（7°-14°C），它们已被证明在古生态学中有用。该物种被分为 5 个气候组合：热带、亚热带、过渡性、亚北极和亚南极。
Although there are more than 70 species of Coccolithophoridae living in the Atlantic only about 16 of these have adequate fossil records, mainly placoliths and to a lesser extent cyrtoliths. Biogeographic ranges determined from surface sediment and plankton samples show that living species have slightly broader distributional ranges than those preserved in oceanic sediments. This is attributed to rapid warming of the Atlantic since the last glacial age. Species distributions have been delineated by maximum position poleward of the limiting isotherm for warm-water species and maximum equatorward position of the limiting isotherm for cold water species. Dispersion beyond their present boundaries by ocean currents after death is negligible. Temperatures studies based on cruise data and t imonthly sampling off Bermuda enabled the authors to determine maximum and optimum temperature ranges for each species. The majority are subtropical forms. A few are stenothermal, such as Umbellosphaera irregularis (21[degree]-28[degree]C) and Coccolithus pelagicus (7[degree]-14[degree]C), and they have proved useful in paleoecology. The species are grouped into 5 climatic assemblages tropical, subtropical, transitional, subarctic, and subantarctic.