A reexamination of the taxonomical study of the genus Skeletonema and their spatial and temporal distribution in Japan

海洋硅藻广泛分布于世界沿海地区。通过基因分析和形态学观察，证明这四种拟步甲均出现在东京湾（S。dohrnii，S. japonicum、日本血吸虫S. tropicum和S. j-d）。测定了不同水温、盐度下的生长速率。生长速度最快的是S. dohrnii，生理特性喜广盐性和广温性。S.日本落叶松生长较晚，喜低温。这些生理特性很好地反映了它们在东京湾的分布。

Marine diatom genus Skeletonema is widely distributed in coastal areas around the world. We showed that the four species to appear from gene analysis and morphological observation in Tokyo Bay(S. dohrnii, S. japonicum, S. tropicum, and S. j-d). For these species, the growth rate of various water temperature and salinity were measured. The highest growth rate was showed in S. dohrnii, and physiological charactaristics were liked to be euryhaline and eurythermy. S. japonicum was late growth than previous specie, and prefer a low temperature. These physiological characteristics were well reflected their distribution in Tokyo Bay.