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双壳类食悬浮物类与食沉积物类的发育变化是反映水动力环境的一种指标。对南海南部NS93- 1 2 - 58柱样 1 4ka来微型双壳类营养结构分析表明 ,晚更新世末次冰期向冰后期全新世转化阶段 ,食沉积物类一度较为发育 ,表明南海南部表层环流很不活跃 ,从这一转化阶段到全新世早期 ,双壳类食悬浮物类与食沉积物类的比例有规律地变大 ,表明随着气候转暖 ,海水温度增高 ,海平面上升 ,海流作用显著增强。该柱样整样分析表明 ,双壳类食悬浮物类占据着明显的优势 ,显示了 1 4ka来南海海流作用一直比较强烈。在全新世中晚期 ,双壳类主要栖息在次表层水团的海底 ,仍以食悬浮物类为主 ,可能与南海南部陆坡上升流发育有关
The developmental changes of bivalve food suspension and food sediment are indicators of the hydrodynamic environment. An analysis of the miniature bivalve nutrition structure of NS93- 1 2-58 in the southern South China Sea showed that the food sediments were once developed during the late Ice Age of the Late Pleistocene to the late Holocene, indicating that the surface circulation in the southern South China Sea is very high Inactive. From this stage of transformation to the early Holocene, the proportion of foodborne species and food sediment in the bivalve pattern regularly increased, indicating that as the climate warms, the seawater temperature increases, the sea level rises, and the ocean current Significantly enhanced. The sample-like sample analysis showed that the bivalve-type food suspended matter occupies a distinct advantage, indicating that the flow from the SCS to the South China Sea has been relatively strong. In the middle and late Holocene, the bivalves mainly inhabit the sub-surface water mass of seafloor, which are still mainly suspended solids, which may be related to the upwelling of the southern South China Sea