A New Discovery of Deep-Water Benthic Organisms from the Southwestern Dongsha Area,South China Sea

Dongsha waters are poorly studied for gas hydrates. Previous multi-channel seismic reflection and Chirp sub- bottom profiles show that numerous submarine mounds stand up to 100 m high above the seafloor over the continental slope of the SW Dongsha Island in northern margin of the South China Sea （SCS）. These mounds are characterized by hardened seabed, seafloor gas venting and folded structures, which implies the existence of active mud volcanoes. This work aims to confirm this speculation by seafloor sample dredging and to explore the potential of gas hydrates.

东沙群岛海区海底泥火山上拍摄到深水生物——自主研发的水下相机试验取得重要发现

通过自研的便携式水下相机,在东沙群岛西北海区水深250~350m的地球物理成像的泥火山上拍摄到了大量深水底栖活体生物、化石和自生碳酸盐结核,其中含有丰富的深水珊瑚、玻璃海绵、海葵、海百合及鱼虾螺贝等。拍摄结果进一步指示了东沙群岛西北部海区存在活跃的甲烷泄漏及泥火山活动。

渤海海洋线虫与底栖桡足类数量之比的应用研究

在渤海的22个站位 ,分3个航次采集未受扰动的沉积物样品 ,进行了小型底栖动物中两个主要类群自由生活海洋线虫和底栖桡足类数量变动和两者数量之比评价沉积物有机污染环境的研究。结果表明 :对于同一航次的不同重复 ,数量变动差异显著或极显著 ;在同一个站位24h6次重复取样 ,两者数量的变异系数较大 ;在应用该比值进行沉积物有机污染评价时 ,在同一站位该比值波动较大。