华南农业大学：《农业生态学》课程教学课件（讲稿）Chapter 4 种群动态 Population Dynamics

Chapter 4. Population Dynamics

1 Chapter 4. Population Dynamics

Contents 1.Characteristics of a population 2.population dynamics (demography):age structure,life table survivorship curve 3.Life-history strategies (r-or K-selected) 2

2 Contents 1. Characteristics of a population 2. population dynamics (demography): age structure, life table & survivorship curve 3. Life-history strategies (r- or K-selected)

Population Ecology Ecological levels oD Organism Population Community Ecosystem Individual 3

3 – Population Ecology Individual

1.Characteristics of a population 4

4 1. Characteristics of a population

种群(population)Definition A group of organisms of the same species which live together in one geographical area at the same time is called population 是指在某一特定时间中占据某一特定空间的一群同种 的有机体，或者说一个种群就是在某一特定时间中占 据某一特定空间的同种生物的集合体 5

5 种群（population） Definition A group of organisms of the same species which live together in one geographical area at the same time is called population 是指在某一特定时间中占据某一特定空间的一群同种 的有机体，或者说一个种群就是在某一特定时间中占 据某一特定空间的同种生物的集合体

1.A population is a group of organisms of the same species which occupies a given area. 2.Organisms do not live solitary lives in isolation from other members of their species 3.Organisms are composed of cells but not simply put cells together(Cells in different tissues have different functions) 6

6 1. A population is a group of organisms of the same species which occupies a given area. 2. Organisms do not live solitary lives in isolation from other members of their species 3. Organisms are composed of cells but not simply put cells together (Cells in different tissues have different functions)

What geographical area to study?In a lake or woodland,some other isolated habitat The boundaries between populations can be arbitrary (人为的)·Populations may be categorized as consisting of either unitary or modular organisms. >

7 What geographical area to study? In a lake or woodland, some other isolated habitat The boundaries between populations can be arbitrary （人为的）. Populations may be categorized as consisting of either unitary or modular organisms

Population problems in our planet 种群问题

8 Population problems in our planet 种群问题

水体的富营养化 (Eutrophication or overnourishing of a waterbody) 水华(algal bloom)

9 水 华( algal bloom ) algal bloom ) 水体的富营养化 水体的富营养化 (Eutrophication Eutrophication or overnourishing overnourishing of a water body ) of a water body )

水体的富营养化 (Eutrophication or overnourishing of a water body 赤潮(red tide) 10

10 水体的富营养化 水体的富营养化 (Eutrophication Eutrophication or overnourishing overnourishing of a water body ) of a water body ) 赤潮 （red tide red tide）