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对广西桂林杨堤晚泥盆世弗拉期-法门期之交剖面连续高密度取样磨片,在显微镜下分别统计腕足动物和葛万藻在薄片中所占面积百分比,以此作为其丰度变化的指标.研究发现,腕足动物与葛万藻之间存在此消彼长的关系.腕足动物的掘穴、觅食等活动对葛万藻的生长起破坏作用,当腕足动物繁盛时葛万藻的数量将会大幅下降,但两者之间并不仅仅是生存竞争关系.葛万藻繁盛时通过光合作用大量释放氧气将会缓解水体缺氧状况,在下Kellwasser贫氧事件中对腕足动物的生存环境起到了改善作用,使得腕足动物丰度上升.丰度增加的腕足动物反过来又压制了葛万藻的生长,造成葛万藻数量锐减.而在缺乏葛万藻改善水体含氧量的情况下,腕足动物在上Kellwasser层的缺氧事件中也受到重创.腕足动物和葛万藻分别作为后生动物和地微生物的代表,在晚泥盆世F-F大灭绝事件中表现出的这种复杂关系对研究地质历史转折期后生动物与地微生物之间的关系具有一定指示意义.
A continuous high-density sampling and grinding of the Devonian-Famenian cross-section of the Devonian-Late Pleistocene Devonian in Yangdi, Guilin, Guangxi was carried out. The area percentage of brachiopods and GE algae in the slices was counted under the microscope as the abundance Indicators.Studies found that there is a reciprocal relationship between brachiopod and Ge Wan algae.Dark burrowing, feeding and other activities of Brachiopods have a damaging effect on the growth of Ge Wanzao, when the number of Brachiopods prosperous when the number of Ge Wan algae will drop significantly, However, the relationship between the two is not merely a matter of survival and competition.Generally, the release of oxygen by photosynthesis during the period of Ge Wan algae will relieve the hypoxia in the water body and improve the living environment of brachiopods in the event of oxygen depletion in Kellwasser, The increased abundance of Brachiopods, in turn, suppressed the growth of Pueraria lobata and caused a sharp drop in the population of Pueraria troglodyta, while in the absence of Ge osmanthus to improve the oxygen content of the water body, Was severely hit. Brachiopods and Ge Wan algae, respectively, as a representative of metazoan microbes in the Late Devonian FF mass extinction event The complex relationship between the geo-history and the transitional period after the transitional geo-microorganisms have some significance.