ENVIRONMENTAL SCIENCE - Pop. Growth.pptx

ENVIRONMENTAL SCIENCE - Pop. Growth.pptx

1. LET US LEARN TOGETHER! POPULATION GROWTH Geneal education 1 – environmental science Population growth  is the increase in the number of people/species in each area .

2. POPULATION GROWTH PATTERNS Exponential Growth Logistic Growth

3. Exponential Growth As the population grows larger, the population grows faster. The population grows as if there is an unlimited resources. But in REALITY: This pattern is not sustained for a very long time or infinitely.

4. The lower the arc, the slower the growth rate of a population (Vice versa).

5. How to calculate growth rate in given a time? GR/ dN dt = FP-IP FT-IT

6. Realistically, Population cannot grow Exponentially forever

7. POPULATION DENSITY - the number of individuals of a particular species within a specific area or volume.

8. POPULATION DENSITY As the density changes, it has an impact on competition for food and resources Ex. Classroom Size * the higher the population density , the higher the competition will be As the population density increases, individual has fewer access to resources.

9. LIMITING FACTORS NUTRIENT AVAILABILITY ENERGY SHELTER WATER PREDATION

10. LOGISTIC GROWTH As a population approaches carrying capacity (K), population growth rate slows.

11. COMPETITION DISEASE PREDATORS NATURAL DISASTER NATURAL DISASTER POLLUTION POLLUTION DENSITY-INDEPENDENT LIMITING FACTORS DENSITY-DEPENDENT LIMITED FACTORS

12. How to calculate the logistic growth?