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赫南特贝动物群是奥陶纪末大灭绝事件第一幕发生之后,在全世界中、低纬度地区正常浅海底域广泛兴起的一个典型的凉水腕足动物群,已知在全世界除澳洲以外的各大洲数十个国家和地区见诸报道.华南上扬子区是赫南特贝动物群最为发育、分布最广泛、地质延限最长、生态分异最复杂的地区.定性与定量分析显示,赫南特贝动物群在扬子区从近岸至远岸的一系列产地,首现层位逐渐升高,动物群延续时限越来越短,而多样性却越来越高.纵向考察表明,近岸产地的赫南特贝动物群多样性由高向低演变,而远岸较深水产地的多样性演变则由低而高.随地点和层位而发生的环境因子变化(如水深、底质等),赫南特贝动物群应对以不同的群落、亚群落或群集.
The Hernant Bay fauna is a typical group of cold-water brachiopods that have emerged widely in normal shallow seabed areas in the middle and low latitudes of the world since the first episode of the Ordovician mass extinction event. It is known that in the world except Australia Reported in dozens of countries and regions other than continents.The upper Yangtze region in South China is the region with the most developed and widely distributed fauna, the longest geologic extension and the most complicated ecological differentiation.Here, qualitative and quantitative analysis The results show that the Hernant Bay fauna in the Yangtze region from the nearshore to the far a series of producing areas, the first cash level gradually increased, fauna extends shorter and shorter, but more and more diversity. The results showed that the diversity of Hernn Tebe fauna in near-shore areas evolved from high to low, and the diversity of far-flung aquatic farms evolved from low to high. The changes of environmental factors with location and horizon (such as water depth , Sediment, etc.), Hernán Tebet fauna respond to different communities, sub-communities or clusters.