Asian American Pacific Islander Month DDSD 2024.pptx
Factors that regulate population ppt presentation
1. Ecology of Individuals and
Populations
Factors that Regulate
Populations
Basilan, Glecy B.
Orenday, Johnrey V.
Ugtuhan, Carren P.
BS Biology III
Basilan | Orenday | Ugtuhan | (c) 2014 1
2. IMPORTANT TERMINOLOGIES
Population
Community
Density
Natality
Mortality
Biotic factors
Carrying capacity
Basilan | Orenday | Ugtuhan | (c) 2014 2
3. Factors Regulating
Population Size
Density-dependent factors -
act on a population such that
the proportion eliminated
depends on the population
density. Basilan | Orenday | Ugtuhan | (c) 2014 3
4. Fig. 1 showing the examples of density-dependent effects
Basilan | Orenday | Ugtuhan | (c) 2014 4
5. Factors Regulating
Population Size
Density-independent - factors
that eliminate a proportion of a
population regardless of
population density.
Basilan | Orenday | Ugtuhan | (c) 2014 5
6. Density-independent
factors
• Forest fire
• Modification of weather
conditions
• Severe storm and flooding
• Earthquakes and volcanic
eruptions
Basilan | Orenday | Ugtuhan | (c) 2014 6
7. Fig. 2 showing the examples of density-independent effect –
Forest fire Basilan | Orenday | Ugtuhan | (c) 2014 7
9. TWO TYPES OF LIFE
STRATEGIES
• K-selected species (Equilibrium)
• Characteristics of r-selected
species (Opportunist)
Basilan | Orenday | Ugtuhan | (c) 2014 9
10. Characteristics of K-selected
species (Equilibrium)
late maturation
longer life spans
more parental care
intense competition for resources
Basilan | Orenday | Ugtuhan | (c) 2014 10
11. Characteristics of r-selected
species (Opportunist)
early maturation
shorter life spans
less parental care
little competition for resources
Basilan | Orenday | Ugtuhan | (c) 2014 11