1.1 What's Community? C98, E168 Definition >An assemblage of species populations that occur together in the same place at the same time. Collections of species which occur together in some common environment or habitat Biological part of an ecosystem >生物群落(biotic community),是指在一定地段或 生境中各种生物种群所构成的集合。 11
11 1.1 What’s Community? Definition ¾An assemblage of species populations that occur together in the same place at the same time. ¾Collections of species which occur together in some common environment or habitat ¾Biological part of an ecosystem ¾生物群落 （biotic community）是指在一定地段或 生境中各种生物种群所构成的集合。 C98, E168
1.2 Key Community Characteristics (1) 群落的基本特征 C98 ()Biodiversity and Relative abundance(丰度) 具有一定的种类组成 What species are present What is the relative abundance of different species How does abundance change between communities 12
12 1.2 Key Community Characteristics (1) 群落的基本特征 (1) Biodiversity and Relative abundance (丰度 ) 具有一定的种类组成 – What species are present – What is the relative abundance of different species – How does abundance change between communities C98
Key Community Characteristics(2) (2)Specific structure.具有一定的结构 Spatial structure(many communities can be described by the Life form of the plants of the communities;vertical structure,horizontal structure) Trophic structure(Food webs,feeding relationships) (3)Temporal(时间)dynamics具有一定的动态特征 -Succession演替 Non-equilibrium dynamics 13
13 Key Community Characteristics (2) (2) Specific structure具有一定的结构 – Spatial structure (many communities can be described by the Life form of the plants of the communities；vertical structure, horizontal structure) – Trophic structure (Food webs, feeding relationships) (3) Temporal (时间) dynamics 具有一定的动态特征 – Succession 演替 – Non-equilibrium dynamics
Key Community Characteristics(3) (4)Influence of species interactions 物种之间存在相互影响 -Competition(竞争) -Stratification(成层) -Dependency(依赖) (5)Restricted distribution具有一定的分布范围 14
14 Key Community Characteristics (3) (4) Influence of species interactions 物种之间存在相互影响 – Competition (竞争 ) –Stratification (成层 ) – Dependency (依赖 ) (5) Restricted distribution 具有一定的分布范围
Key Community Characteristics (4) (6)Specific habitats inside communities 具有一定的群落环境 (7)Specific characteristics in the fringe 具有特定的群落边界特征 -ecotone(群落交错区) -edge effects(边缘效应) 15
15 Key Community Characteristics (4) (6) Specific habitats inside communities 具有一定的群落环境 (7) Specific characteristics in the fringe 具有特定的群落边界特征 -ecotone (群落交错区 ) -edge effects (边缘效应 )