Unit 3 topic 1 Flashcards
(22 cards)
Biodiversity
The sum of all biotic variation from the level of genes to ecosystems
Genetic Diversity
Differences in DNA content among individuals within species and populations
Species Diversity
Number and variety of species in world or particular area
Ecosystem Diversity
Number and variety of ecosystems or habitats within a given region.
Temporal scales
How communities change over time
Spatial scales
How communities change over space and distance
4 Important species interactions
- Predation
- Competition
- Symbiosis
- Disease
What is predation?
One species (predator) kills another species (prey), and eats it.
What is interspecific competition?
Members of different species attempt to acquire the same limited resource.
What is intraspecific competition?
Competition between members of the same species.
What are the 5 types of symbiosis?
- Mutualism
- Parasitism
- Cooperation
- Commensalism
- Amensalism
Mutualism
Both species benefit from relationship.
Parasitism
One species (parasite) depends on a host for its survival.
Cooperation
Each species benefit from the association, but presence is not essential for survival.
Commensalism
One organism benefits and other is not affected.
Amensalism
One species inhibits the other.
What is disease?
Results from infection with a disease causing organism (pathogen). Relationship is parasitic.
3 abiotic factor groupings
- Climate
- Substrate (soil)
- Size/depth of area
Distribution
The region in which one or more members of the species may be found.
Abundance
The numbers of each species in that region at that time.
Environmental limiting factor
Any factor that limits the growth of a population.
3 main factors that limit distribution and abundance
- Characteristics of the environment
- Characteristics of the organism
- Interactions between organisms
