Fission and the dynamics of genets and ramets in clonal cnidarian populations
Fission and the dynamics of genets and ramets in clonal cnidarian populations
复制标题
克隆刺胞动物种群中基因和分株的裂变和动态
DOI：
10.1007/bf00026468
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发表时间：
1991
期刊：
影响因子：
2.6
通讯作者：
R. Karlson
中科院分区：
文献类型：
--
作者：
R. Karlson
克隆种群的动态涉及一系列控制基因(即无性系)和分株(即无性系的模块亚基)的‘出生’和‘死亡’的生物过程。使用改进的莱斯利矩阵对开放的、分裂的、资源有限的种群的这两种组织水平进行了检查。种群预测被用来说明用一系列招募、死亡率和分裂率来预测假设种群的平衡种群大小和克隆结构的方法，并预测了两个常见的珊瑚礁带状动物的自然种群的这些参数。索兰德利。当招聘率低而存活率高时，裂变对种群结构的影响最大。高的募集率导致密度依赖的分裂受到抑制。低存活率通过限制分株的数量达到足以发生分裂的大小来阻止分裂。在对褐飞虱种群的预测中，未受干扰的种群在2-30年内达到平衡大小，但这些种群内的基因数量在更长的时间段内继续变化。这一结果表明，自然种群的克隆结构可能不是处于或接近平衡的，对这种结构的现实预测需要对过去历史的广泛了解。
The dynamics of clonal populations involve a range of biological processes controlling ‘birth’ and ‘death’ rates of genets (i.e., clones) and ramets (i.e., the modular subunits of clones). These two levels of organization were examined for open, fissiparous, resource-limited populations using a modified Leslie matrix. Population projections were used to illustrate the method of predicting equilibrium population sizes and clonal structure for hypothetical populations with a range of recruitment, mortality, and fission rates; and to predict these parameters for natural populations of two common, coral reef zoanthidsZoanthus sociatusandZ. solanderi. Fission had the largest impact on population structure when recruitment rates were low and survivorship high. High recruitment rates resulted in the inhibition of densitydependent fission. Low survivorship precluded fission by restricting the number of ramets reaching a size large enough for fission to occur. In projections for zoanthid populations, undisturbed populations reached equilibrium sizes in 2–3 decades, but genet numbers within these populations continued to change over much longer time periods. This result indicates that the clonal structure of natural populations may not be at or near equilibrium and that realistic predictions about this structure will require extensive knowledge of past history.