Exam Prep Flashcards
What information is crucial when concluding character displacement?
Character characteristics.
Which latitudes receive the most direct sunlight?
Tropics of cancer and Capricorn (23.5 N and S latitude)
r in density independent must be?
Constant
In density dependent, r is?
Not constant
Lee Affect?
When the per capita change in population size at initial population size decreases, then increases.
The mechanisms for matter to get cycled back into the ecosystem?
Decomposition
Increase or decease in immigration and extinction rate can be a vertical, horizontal, or both shift?
Both
!!!STUDY LIMITING NUTRIENT: Limiting nutrient at a site is the?
Nutrient that cause the largest positive change on ecosystem function since it is already lacking and thus have already caused ecosystem function to be low.
Source habitats?
b > d
Can we just assume that a species with varying characteristics are character displacement?
No, we need to determine whether there is recourse partitioning in sympatry.
Sympatry, allopatry?
Two or more species have a population in the same region, two or more species have a population at isolated regions.
Life history trade-offs?
When an trait increases the fitness of an individual but decreases the fitness of another trait, thus balancing together
What two pieces of information are essential when determining growth rates?
Birth and death rates.
What is the main definition of r?
The percent change of a population in proportions.
If competitive exclusion at all initial conditions, equilibrium population sizes?
Competitively excluded species = 0
Competitive species = carrying capacity
Stability favours, instability favours?
Specialists, generalists
If you have more stable environment, do you have higher or lower speciation rate?
Higher speciation rate at more stable climates because you can develop specialists.
What is an important limitation in rank abundance curves?
They only tell us evenness at one specific time point and lack information on the future.
If you have portfolio effect, species fluctuate?
Asynchronously
If portfolio effect, some species must fill what roles in the community?
The same roles
