...structure）是指群落的所有种类及其个体在空间中的配置状态。它包括层片结构、垂直结构、水平结构、时间结构等。层片（synusia）指群落中属于同一生活型的不同种的个体的总体，它是群落最基本的结构单位。
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specific synusia 单种社会
seasonal synusia 季节性单层群落
plant synusia 植物层片
synusia a 同型境群落
synusia structure 层片结构
annual plant synusia 一年生植物层片
Abies fargesii forest is classified into 3 types, i. e. shrubs-Abies fargesii stands, herbs-Abies fargesii stands and mosses-Abies fargesii stands in accordance with their synusia characteristics.
根据巴山冷杉林的层片特征，把巴山冷杉林划分为灌木—巴山冷杉林、草类—巴山冷杉林和藓类—巴山冷杉林三类。
参考来源 - 秦岭巴山冷杉林群落学特征、类型划分及生产力研究In this paper, species composition, synusia structure, arbor DBH grade and height structure distribution pattern of Picea asperata primitive forest in this district, were analysed.
本文分析了该区云杉原始林的种类组成、层片结构、云杉径级和高度分布格局。
参考来源 - 川西米亚罗亚高山地区云杉林群落结构分析·2,447,543篇论文数据，部分数据来源于NoteExpress
The term 'synusia 'was defined so broadly that confusion in use of the concept resulted.
“层片”一词的定义过于广泛，以致在层片概念的应用中引起混乱。
Layer structure, synusia structure and height - classes structure and dynamics of degraded ecosystem were studied.
对退化生态系统的层次结构、层片结构、高度级结构及其动态等进行了研究。
The results showed that the more serious the community degraded, the simpler the layers, the synusia and the height- classes structures in community were.
结果表明：群落的退化程度越严重，群落的层次、层片和高度级结构越简单；
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