群体生物 meaning in Chinese

colonial organisms

In a survey aiming at making clear of the environmental conditions of plants in the as - contaminated areas in hunan province , it is found that as - contamination has caused a marked decrease in plant species and reduction in biomass of the plants grown there . moreever , there is higher than 54 % of cultivated vegetables with as content beyond the critical value of safety for food
本研究首先调查了湖南砷污染区的植物生长环境，发现砷污染已导致植物种类减少，群体生物量下降；污染区栽培的蔬菜有54砷含量超标，其中菠菜、茼蒿和莴笋等超过最大许可量( mpc )的5倍左右。