乌克兰蒲公英的形态计量学研究

A. Mienasova, L. Popova, I. Dzeverin
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引用次数: 0

摘要

Tirasiana Palij, 1976是一个径向对称的Vendobionts属,它被保存为两个重叠盘的正凹形。在Podolian Dnister地区、白海地区和乌拉尔地区的Vendian矿床中发现了Tirasiana。为了更好地了解旺迪亚生物群的性质和生活方式,采用统计方法对这些印痕进行了研究。对29种地拉鱼标本进行了取样研究。为了验证异速生长的假说,研究了外盘直径和内盘直径两个特征。研究结果表明,印痕的内径和外径之间的关系几乎是理想的等距,这意味着没有证据表明Tirasiana和刺胞菌之间存在关系。分析了这些特征的分布规律,并对其正态性假设进行了检验。构造了它们的分布直方图和经验附加累积分布函数。基于罗汉鱼在整个个体发生过程中保持恒定生长的假设,以及线性大小与个体年龄的比例关系,罗汉鱼标本取样的累积分布函数可视为生存曲线,并可采用生态学中可接受的标准方法进行分析。如果我们接受这个假设,那么第一类的生存曲线是Tirasiana的特征,对应于它们的死亡概率随着个体年龄的增加而增加。所研究的地陷是由于陆源物质的积累而形成的,这些陆源物质来自附近未被植被稳定的陆地。这种陆源沉积物有规律地掩埋了海底底栖生物群落。标本取样的异质性可以用“生存站”的存在来解释,这些“生存站”是古盆地中保护较好的部分(悬垂岩石、湾坝等)。因此,在这些地方,Tirasiana可以获得更大的规模。
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MORPHOMETRICS OF TIRASIANA FROM VENDIAN OF PODILLIA (UKRAINE)
Tirasiana Palij, 1976 is a genus of radially symmetric Vendobionts, which were preserved as a positive hyporelief of two superimposed discs. Tirasiana are found in the Vendian deposits of the Podolian Dnister area, the White Sea area and the Urals. For better understanding of the nature and lifestyle of Vendian biota, imprints of the Tirasiana were investigated by statistical methods. Sampling of 29 specimens of Tirasiana was studied. To test the hypothesis about the allometric growth of Tirasiana, two features were studied, the diameters of the outer and inner discs. As a result of the study, it has been established that the relationship between internal and external diameters of the imprints is almost ideally isometric, which means that there is no evidence for relation between Tirasiana and Cnidaria. The distribution patterns of these features were analyzed and the assumption about their normality was tested. Histograms of their distribution and empirical additional cumulative distribution functions were constructed. Based on the assumption of the constant growth of Tirasiana throughout onthogenesis and the proportionality of the linear size and individual age, the cumulative distribution functions may be considered as survival curves in the sampling of specimens of Tirasiana and may be analyzed by standard methods accepted in ecology. If we accept this assumption, then the survival curve of the first type is characteristic of the Tirasiana, which corresponds to the increase of probability of their death with the increase of individual age. The studied taphocenosis was formed as a result of accumulation of terrigenous material, which came from the nearby land that was not stabilized by vegetation. This terrigenous sediment buried benthic sublittoral communities regularly. The heterogeneity of the sampling of specimens can be explained by the presence of "survival stations", well-protected parts of the palaeobasin (overhanging rocks, baybar, etc.). As a result, in such places Tirasiana could attain much larger size.
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HISTORY, CURRENT STATE AND FUTURE PROSPECTS OF GEOELECTROMAGNETIC RESEARCH IN UKRAINE HIGHLY PROSPECTIVE OBJECTS OF THE MINERAL AND RAW MATERIAL BASE OF UKRAINE. PART 1. METALLIC MINERALS CRETACEOUS RIFTING IN THE GEOLOGICAL HISTORY OF THE UKRAINIAN SECTOR OF THE BLACK SEA GEOPHYSICS OF PEDOSPHERE IN KYIV UNIVERSITY REGIONAL MINERAL AND RAW MATERIAL BASES AS A KEY FACTOR IN THE DEVELOPMENT OF UKRAINE DURING THE WAR AND POST-WAR PERIODS
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