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Population structure and size-dependent reproductive effort in Umbilicariaspodochroa

机译：脐带孢菌种群结构和规模依赖的生殖工作

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摘要

The size structure and the relationship between individual thallus size and apothecium production was investigated in crowded populations of the saxicolous, umbilicate lichen Umbilicaria spodochroa in coastal cliff communities in southern Norway. There was a strong positive correlation between apothecium production and the mass and diameter of individual thalli. The study also indicated the existence of developmental maturation thresholds, a minimum diameter and mass that has to be reached before apothecium production can commence. Linearity of the relationship between thallus mass, thallus upper surface area and minimum number of apothecia produced after maturation suggests that in these size stages there is a constant proportion of resource allocation to reproduction. The populations exhibited pronounced size hierarchies, commonly with many small individuals and fewer big ones. Thus at any time the few large thalli contribute more to the propagation of the population than many of the more numerous small individuals. The Gini-coefficient of inequality of mass between individuals ranged from 0.48 to 0.70 in the sampled populations and was correlated with population density.
机译：在挪威南部沿海悬崖群落中，在拥挤的剑形，脐状地衣Umbilicaria spodochroa的拥挤种群中，研究了大小结构及其个体th体大小与紫罗兰产生的关系。顶芽孢杆菌的产生与各个沙丘的质量和直径之间存在很强的正相关关系。这项研究还表明存在发育成熟的阈值，在开始生产载脂剂之前必须达到最小的直径和质量。 all体质量，all体上表面面积和成熟后产生的最小紫杉数量之间的关系呈线性关系，这表明在这些大小阶段中，资源分配与繁殖的比例是恒定的。人口显示出明显的规模等级，通常有许多小个体而较少。因此，在任何时候，少数大型塔利人对人口繁殖的贡献要比许多小型个体更多。样本人群中个体之间的质量不平等的基尼系数在0.48到0.70之间，并且与人口密度相关。

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