artificial community造句

Iii ) for artificial communities including herbaceous community , pure conifer and needle broad - leaved mixed forest , the poor niche configuration and serious niche overlap of component species made the composition structure of community be in an unstable state
3 )人工构建的群落(包括草本群落、针叶纯林和针阔混交林)其组成物种生态位配置差，生态位重叠大，造成群落组成结构不稳定。
3 ) the soil moisture under the artificial community was twice that of non - vegetation slopes ; topsoil moisture increased by more that 200 % during the rainy season , but in the dry season the soil moisture under the introduced vegetation was close to or even lower than that of non - vegetation slopes
： 3 )根据土壤含水量的分析，雨季植被下土壤含水量比光坡地增加约100 ，表层上则增加2倍以上；但旱季，乔木林地土壤含水量与无植被覆盖地相近甚至低于无植被覆盖地。
It's difficult to find artificial community in a sentence. 用artificial community造句挺难的