Populations - Distribution and Growth Flashcards
What are the properties of populations (5)?
Geographic range, abundance, density, dispersion, dispersal
How are populations measured?
Census, quadrat, mark-recapture
What are the types of population growth models?
Density independent (exponential) and density dependent (logistic)
Why are population dynamics important for conservation and resource management?
If how populations change in response to their conditions is understood, then populations can be managed by manipulating the conditions
How can you distinguish individuals from populations?
Can be difficult to distinguish, so must be defined by the study.
Genetically identical individuals may be linked by runners. Genets are composed of ramets.
What can the spatial distribution of a population tell us about its behaviour and ecology?
Spatial distribution tells us where the specie’s favourable habitats are - favourable as in close to good foraging spots, protected, beneficial interactions with other species.
Populations can be either ________ or ________, and measured at ________ or ________ time intervals.
Populations can be either open or closed, and measured at discrete or continuous time intervals.
Density-independent
Exponential growth, population size limited by chance abiotic factors (ex. flooding, fire)
Density-dependent
Logistic growth, population size limited by competition for resources
Population
Individuals of the same species co-occurring in time and space, dynamic
Population dynamics
Models that predict how populations will change over time and space
Genet
Genetically distinct individual, composed of ramets
Ramet
Genetically identical sub-individuals of a genet
Geographic range
Area encompassing all individuals of a species. Limited by temperature, rainfall, geographic boundaries (ex. mountains, oceans)
Geographic range: distribution
Presence or absence of a species depending on environmental conditions