Evolutionary events of Cainozoic Ostracoda of western Philippine Sea and paleoceanographical implications
Evolutionary events of Cainozoic Ostracoda of western Philippine Sea and paleoceanographical implications
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DOI：
10.1360/yd1998-41-3-282
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发表时间：
1998-05
期刊：
影响因子：
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通讯作者：
Z. Quanhong;R. Whatley
中科院分区：
文献类型：
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作者：
Z. Quanhong;R. Whatley
菲律宾海西部IISDP 292站渐新世介形类动物群具有高密度、高多样性和高起源的特点，可能反映了一个有利的深海介形类时期，而渐新世介形类动物群的密度和多样性急剧下降，并出现了反复的灭绝现象。晚第三纪可能指示了当时底水环境的恶化。根据动物群的密度、多样性和演化程度（起源和灭绝），共划分出5个主要的动物群变化时期，分别为渐新世早期（PI 8）、渐新世中期（P 2 1）、中新世早期（N 4）、中新世早期（N 8）和上新世晚期（N 2 1）。分别介形虫动物群的这些变化代表了与全球古海洋变化有关的短期事件，并记录了西太平洋和菲律宾海深水的新生代冷却历史。
The Oligocene ostracod fauna of IISDP Site 292 of the western Philippine Sea was marked by high density, diversity and origination, probably reflecting a favorable period for deep-sea Ostraroda; while the sharp decrease in dtmsity and diversity as well as the repeatedly occurring vxtinctions in thc. Neogene may indicate the deterioration in bottom-water environmcnts at that tlme. Five rriajor faunal changes have been recognized in terms of density, diversity and evolutionary artivity (origination and extinction), occurring in the earliest Oligocene (PI8), mid-Oligocene (P21), earliest Miocene (N4), early Middle Miocene (N8) and late Pliocene (N21). respectively. These changes in ostracod faunas are suggested to represent short-term events related to global paleoceanographical changes and to record the Cainozoic cooling history of the West Pacific Ocean and Philippine Sea deep-water.