Topic 6- C Flashcards
Definition of ecosystem.
All of the biotic and abiotic conditions in an area.
What are biotic factors? Give an example.
The living features of an ecosystem. E.g- Presence of predators.
What are abiotic features? Give an example.
The non-living features of an ecosystem. E.g- Temperature.
Definition of habitat.
The place where an organism lives within an ecosystem.
Definition of niche.
The role of a species within the habitat, depending on both biotic and abiotic interactions - If 2 species have the same niche, they have to compete until one is left.
Definition of adaptation.
The feature that members of a species has that increases their chance of survival and therefore the chance of reproduction to pass on the advantageous alleles. This increases this alleles frequency.
What are the 3 types of adaptations? Describe them.
Anatomical: Changes to the structural features of an organism’s body.
Physiological: Changes to the processes inside the body.
Behavioural: Changes to the way an organism acts.
Definition of population.
All of the organisms of one species within a habitat.
Definition of community.
The populations of different species in a habitat.
Definition of carrying capacity.
The maximum stable population size of a species that an ecosystem can support.
Definition of interspecific competition.
Competition between different species for the same resources - the better adapted will out compete the other.
Definition of intraspecific competition.
Competition within the same species.
Definition of abundance.
The number of individuals of one species in a particular area.
Definition of distribution.
Where in a particular area a species is found.
Why do people use random sampling methods?
Because calculating abundance and distribution are very time consuming. It also avoids bias.
