Population 1
What is dispersion?
the pattern of spacing among individuals
What is a population?
a group of potentially interacting and breeding individuals
What are two other methods to measuring/estimating population sizes other than mark and recapture?
grids/quadrats and transects
What does dN/dt mean?
The change in a population over the change in time
What are abiotic factors that could limit population distribution?
moisture, light, oxygen, pH
What are the 4 components of a population?
birth, death, immigration, emmigration
What is "r"?
the instantaneous rate of change or the rate a population increases or decreases
First year of sampling jewelweed there are 243 plants. The next year in the upland you count 356. What is the change in population rate?
0.68
K-selected species have _____ reproduction rate, have a _____ investment in their young, and are normally _______ lived.
low; high; long
What is carrying capacity?
the maximum population that can be supported by the environment
What are the assumptions to mark and recapture?
1. closed population
2. equal chance of capture
3. enough time between capture to mix
The carrying capactiy for deer in Washington County is 15,000, and the growth rate of the population is 1.6 per year. What is the maximum sustainable yield for deer per month?
500
Which survivorship would most likely correspond to a bird?
B
Look at the board! Which survivorship curve is mostly likely an animal with high rates of reproduction and low survivorship?
C (BOTTOM/BACKWARDS J)
Populations can increase indefinitely because eventually______, _______, ________, and ______ will reduce their population and slow growth rate.
decrease in accessibility to food, increase in competition, increase in disease rate and increase in predation
Judith did a mark and recapture of rosy maple moths. Her first night she captured 15 moths. Five days later she captured 9, and 3 had been previously captured. What is the estimated population size?
45
Optimal clutch size is dependent on the _______ and the __________ of the young.
amount of energy need to produce offspring and survival rate
What is the allee effect?
when population density is so low, see a negative population growth (reduction in the population).... due to inability to find mate or to cross pollinate
IF dN/dt is zero, the population is _______ and at _______.
Stable; carrying capacity
1. A mapache goes into an agricultural field at night and stays for hours to feed but once the sunrises, it goes back into the jungle and leaves corn behind. This is an example of?
2. A butterfly spends a long time in a wildflower field drinking nectar because the next closest area with flowers is 20 km away. This is an example of?
1. Giving-up density
2. Marginal Value Theorum