WebAnalisis mikropaleontologi (foraminifera dan nannofosil) merupakan data pendukung dalam merekonstruksi stratigrafi sedimen laut. Studi ini dilakukan untuk menganalisis keragaman dan kelimpahan nannofosil serta foraminifera untuk menentukan umur dan WebAug 3, 2024 · caribbeanica were distinguished, and poorly preserved placoliths of Gephyrocapsa were termed Gephyrocapsa spp. The number of coccoliths per gram of …
Gephyrocapsa - Wikipedia
WebApr 9, 2014 · The assemblages are mainly composed of Gephyrocapsa caribbeanica (correlation = 0.85 with dominance, Figure 2h) that reaches higher abundance during interglacials (Figure 2d). The G. margereli-G. muellerae group is also a major component of the assemblages with percentages as high as 35%. WebMay 4, 2010 · There is evidence that Gephyrocapsa caribbeanica, which is closely related to E. huxleyi, was globally dominant in the late Pleistocene (480–262 ka). Morphological analyses of Gephyrocapsa coccoliths reveal that only two of six Holocene morphological associations occurred during this time interval. We examine three potential causes for the ... 顎 尖らせる ヒアルロン酸
Cyclic evolution of phytoplankton forced by changes in ... - Nature
WebGephyrocapsa caribbeanica, the most temperature-tolerant species of Gephyrocapsa, occurs commonly through the Pleistocene cores. The warm-water species G. oceanica … WebMay 5, 2024 · Without the contribution from larger Gephyrocapsa ( G. caribbeanica, G. muellerae, G. oceanica ), alkenone production is significantly lower during interglacial … WebA decrease in warm, oligotrophic taxa such as Umbilicosphaera sibogae, with a shift from Gephyrocapsa sp. to Reticulofenestra sp., and an increase of mesotrophic taxa (e.g., Umbilicosphaera jafari and Helicosphaera spp.) suggest that tropical Pacific ITF sources were replaced by cooler, fresher, northern Pacific waters. 顎 左右に動かす