Johnson Zackary I, Zinser Erik R, Coe Allison, McNulty Nathan P, Woodward E Malcolm S, Chisholm Sallie W
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 15 Vassar Street 48-419, Cambridge, MA 02139, USA.
Science. 2006 Mar 24;311(5768):1737-40. doi: 10.1126/science.1118052.
Prochlorococcus is the numerically dominant phytoplankter in the oligotrophic oceans, accounting for up to half of the photosynthetic biomass and production in some regions. Here, we describe how the abundance of six known ecotypes, which have small subunit ribosomal RNA sequences that differ by less than 3%, changed along local and basin-wide environmental gradients in the Atlantic Ocean. Temperature was significantly correlated with shifts in ecotype abundance, and laboratory experiments confirmed different temperature optima and tolerance ranges for cultured strains. Light, nutrients, and competitor abundances also appeared to play a role in shaping different distributions.
原绿球藻是贫营养海洋中数量占主导的浮游植物，在某些区域占光合生物量和产量的一半。在此，我们描述了六种已知生态型（其小亚基核糖体RNA序列差异小于3%）的丰度如何随大西洋局部和全洋盆范围的环境梯度而变化。温度与生态型丰度的变化显著相关，实验室实验证实了培养菌株不同的最适温度和耐受范围。光照、营养物质和竞争者丰度似乎也在形成不同分布中发挥作用。
