Biodiversity and Flow of Energy Flashcards
-Ultimate source of energy
Sun
- Transferred and transformed from one organism to another
- 2 Organism feed on another
- Decomposers extract this from remains
- Inorganic materials are cycled, this is not
Energy
- Many different species
- Broad distribution of genetic diversity
High biodiversity
- Only a few species
- Low genetic diversity within population
Low biodiversity
-Refers to the diversity of habitats in a given area
Habitat diversity
refers to the total number of relative abundance of species
Species diversity
- Refers to the total number of genetic characteristics of a specific species, subspecies, or a group of species
- enables population to adapt to changing environments (survival of the fittest)
Genetic Diversity
This helps makes an ecosystem more stable.
Biodiversity
-The study of the factors that influence the size, density, distribution and growth of a population
Population energy
Refers to a group of organisms of the same species that live in a particular area
Population
Any environmental factor that limits the size of a population
Limiting factor
Properties of population
Population density, ecological density and population distribution
Refers to the number of individuals per unit area or unit volume
Population density
Refers to the number of individuals per unit area of available space
Ecological density
Is the spatial distribution of individuals of a population
Population distribution
-Individuals in a population are independent of each other because the habitant conditions are relatively uniform
Random dispersion
-Individuals are about the same distance from one another due to competition
Regular/Uniform dispersion
-Individuals clump together because resources and suitable habitats
Clumped/Aggregated dispersion
Factors that influence population size
Birth rate, Date rate, immigration, emigration
- Assumes a constant growth rate
- J-shaped population
- In order to have this, resources must be unlimited
Exponential Growth
- More realistic model where growth varies with population size
- S-shaped
- Tend slow down growth once capacity is reached
Logistic Growth
- Affect a population when it reaches a certain density
- Includes: competition, predation, diseases, parastism, crowding and stress (man made problems or problems within control)
Density dependent factors
- Affect a population regardless of density
- Includes: food, nutrient limitation, pollutants, weather disturbances, natural disasters (problems out of control)
Density independent factors
