Chapter 16 community succession 群落演替 1
1 Chapter 16 community succession 群落演替
4.1 What's succession P111 Succession is defined as a continuous. sequential change in the species composition of a natural community. 生物群落的演替是指 在某一地段上一种生 物群落被另一种生物 群落所取代的过程，它 是群落动态的一个最 重要的特征 n Pn and Shrubs Hardwood Plants and at8ognes Trees Grasses Time-
2 4.1 What’s succession Succession is defined as a continuous, sequential change in the species composition of a natural community. P111 生物群落的演替是指 在某一地段上一种生 物群落被另一种生物 群落所取代的过程,它 是群落动态的一个最 重要的特征
Sere ·Sere:a“unit'of succession 从生物侵入开始直至顶极群落的整个顺序演变过程构成一个 演替系列 。 Seral stage:each community type within the sere -Pioneer community:the first seral stage先锋群落 Seral Community/Successional Community the intermediate stages 生群落 -Climax community:the final seral stage顶极群落 It usually takes an area 500-1000 years to go from pioneer to climax seral stages. 3
3 • Sere: a “unit” of succession 从生物侵入开始直至顶极群落的整个顺序演变过程构成一个 演替系列. • Seral stage: each community type within the sere – Pioneer community: the first seral stage 先锋群落 – Seral Community/ Successional Community : the intermediate stages 中 生群落 – Climax community: the final seral stage 顶极群落 • It usually takes an area 500–1000 years to go from pioneer to climax seral stages. Sere
Early successional Late successional species: species:pioneer climax communities communities High growth rate Slower growth rate Small size Larger size Wide dispersal Lower rates of dispersal ·Fast population Lower rates of colonization growth 。 Longer lives
4 Early successional species: pioneer communities • High growth rate • Small size • Wide dispersal • Fast population growth Late successional species: climax communities • Slower growth rate • Larger size • Lower rates of dispersal • Lower rates of colonization • Longer lives
What is Climax Community? 顶极群落 .A climax community is a more or less permanent and final stage of a particular succession. 顶极群落：演替最终的成熟群落.每一演替系列都是由先锋阶 段开始，经过不同的演替阶段，到达中生状态的最终演替阶 段（群落类型）。 Climax communities are characterized by slow rates of change,compared with more dynamic, earlier stages. They are dominated by species tolerant of competition for resources. 5
5 •A climax community is a more or less permanent and final stage of a particular succession. 顶极群落：演替最终的成熟群落. 每一演替系列都是由先锋阶 段开始，经过不同的演替阶段，到达中生状态的最终演替阶 段(群落类型)。 • Climax communities are characterized by slow rates of change, compared with more dynamic, earlier stages. • They are dominated by species tolerant of competition for resources. What is Climax Community? 顶极群落