Week 7 Flashcards
Define density independent population regulation
Form of population regulation dependent on abiotic factors that lead to a change in the carrying capacity
Define density dependent population regulation
Form of population regulation dependent on biotic factors such as Birth/Death rates - Competion/Predation, that lead to a change in the carrying capacity
What are limiting factors
factors like food that if changed produces a change in the average or equilibrium density of a population
What are regulating factors
Ones where the % mortality caused by the factor increases with an increasing population density
(Disease in a population)
What are extrinsic properties
Properties external to a population. I,e: Biotic/Abiotic.
Predators - Food supply - Disease - Parasites - Weather - Shelter.
what are intrinsic properties
Properties internal to a population that can vary within individuals. I,e Sex - Age - Physiology - Behaviour - Genetics - Intra specific competition
What combination controls population regulation
Extrinsic and Intrinsic processes`
What is a meta-population
Groups of populations of the same species that are separated via space but interact as individuals move from one population to another.
What are some pros and cons to meta-populations
Diversity of the Gene-pool, although same populations have reduced gene-pool effecting the adaptability of the offspring
Define a community
Populations of species that live and interact in the same area
What is primary succession
The first organisms that moves into a newly formed habitats like new islands, sand dunes, or newly exposed rocks (Centuries)
What is secondary succession
When a previously existing life filled habitat has been disturbed leaving behind only some life and nutrients
Define an alternative stable states
Prediction that ecosystems can exist under multiple states caused via ecological feedback, typically being non-transitory (Separated via Ecological thresholds)
What are two models of succession
Relay Floristics and Initial Floristics
What is Relay Floristics
Competition between organisms where the winning organism is unknowingly preparing the conditions for the next competitor
