春季高峰 meaning in English

spring maximum

The annual averages of the density of phytoplankton and chl . a showed two peaks . the abundance of phytoplankton remained dominant from july to october in 2001 , and gradually decreased from october in 2001 to february in 2002 . the density began to rise from march , and up to the peak in april
浮游植物的总细胞数和叶绿素的周年变化模式为双峰型， 2001年7至10月是浮游植物的夏季高峰期，此后直到2002年2月浮游植物丰度逐渐降低，浮游植物从3月开始增长，至4月达到浮游植物的春季高峰，之后浮游植物异常减少，导致2002年夏季的低谷。