Ecology of bdelloids: how to be successful
Ecology of bdelloids: how to be successful
复制标题
蛭形动物的生态学：如何取得成功
作者：
C. Ricci
蛭形类生活在许多不同的环境中。整个分类单元是属于轮虫门的一个目。蛭形目蛭形目蛭蛭形类的广泛分布有两个特点，即孤雌生殖和它们通过脱水生活抵抗不利条件的能力。前者是一种无融合生殖的雌配子，可以确保克隆内的遗传同质性。然而，证据表明之间和孤雌生殖克隆内的变异进行了讨论。最近的一些实验证据表明，脱水生活并不影响幸存个体的生活史。被认为是对蛭形虫种群的影响。
Bdelloids inhabit many different environments. The entire taxon is an order belonging to the phylum Rotifera. In spite of its wide distribution, it has a very uniform morphology, suggesting that natural selection has had almost no effect on its morphological characteristics.This paper reviews the geographical and ecological distributions of bdelloids and their ability to tolerate different conditions is discussed. Two characteristics account for the wide distribution of bdelloids, parthenogenetic reproduction and their ability to withstand unfavorable conditions through anhydrobiosis. The former is an apomictic thelytoky which may ensure genetic homogeneity within clones. However, evidence which suggests variability among and within parthenogenetic clones is discussed. Some recent experimental evidence indicates that anhydrobiosis does not affect the life history of the surviving individuals. The effects of anhydrobiosis on bdelloid populations are considered.