Populations
Community Interactions
Ecosystems
Biodiversity
Calculations
Random Ecology
Animal Behavior
100
2 deer per acre describes this property of a population.
What is population density?
100
Describes all of an organism's interactions with the biotic and abiotic environment.
What is its niche?
100
Recycle nutrients back into an ecosystem.
What are detrivores/decomposers?
100
Describe biodiversity when the Simpson's biodiversity index is low.
What is low?
100
A population of mice has a per capita birth rate of 0.8 and a per capita death rate of 0.6. The per capita growth rate for the population?
0.2
100
These two biological processes play a key role in the carbon cycle.
What are photosynthesis & cellular respiration?
100
Bird migration is an example of this type of behavior.
What is innate?
200
When individuals exhibit aggressive territorial behavior this dispersion pattern may be seen.
What is nearly uniform?
200
The continual occurance of these often prevent climax communities from being reached.
What are disturbances?
200
How much energy is passed on from one trophic level to the next?
10%?
200
One would predict a population with with an age structure diagram with a wide base to be doing what in the future.
What is increasing?
200
What is the mean growth rate between days 15 and 17?
250 individuals / day
200
Three types of symbiotic relationships.
What is mutualism, commensalism, and parasitism?
200
The pill bugs in our lab #1 experienced what kind of behavior, as they moved randomly when exposed to light.
What is kinesis?
300
This survivorship curve is most likely seen in organisms who exhibit r-selected traits.
What is Type III?
300
A harmless species mimics a harmful one in order to increase its chance of survival.
What is Batesian mimicry?
300
How many secondary consumers would you predict can be supported if there are 2000 producers?
What are 20?
300
Answers how physiological or environmental factors cause animal behaviors.
What is the proximate cause?
300
A population of bunnies is growing exponentially. The growth rate of the population, r, is 2 and the current population size, N, is 4,500 individuals. How many bunnies are being added to the population each year?
9,000 bunnies
(dn)/dt=rmax*N
300
An organism that while found in small numbers, their presence promotes diversity in an ecosystem.
What is a keystone species?
300
A behavior that reduces individual fitness but increases fitness of recipient and overall group.
What is altruism?
400
Three factors that regulate population growth based on the density of the population. (List three examples.)
What are: predation, competition, disease, territoriality, and waste accumulation?
400
States that no two species can occupy the same niche.
What is the competitive exclusion principle?
400
The amount of energy available to consumers after producers use what they need for their own metabolism.
What is Net Primary Productivity?
400
The gradual process by which the species composition of a community changes and develops over time after a disturbance that leaves the soil in tact.
What is secondary succession?
400
A hypothetical population has a carrying capacity of 1,000 individuals and the rmax us 1.5. What is the population growth rate for a population of 900 individuals?
It will grow by 135 individuals.
(dn)/(dt)=1.5*900((1000-900)/1000)
400
A population has a birth rate of 0.6 and a death rate of 0.6. This population is experiencing...
What is zero population growth?
400
Difference in appearance between male and female individuals species as a result of sexual selection.
What is sexual dimorphism?
500
A population of red fox has a carrying capacity of 700. The population growth rate will be at its highest at what poulation size.
What is 350?
500
Described as the "proportion of each species in the community" and can affect community diversity.
What is the relative abundance?
500
This cycle is important for the formation of amino acids.
What is the nitrogen cycle?
500
In Rochester, the Purple Loosestrife was brought to North America from Europe as a decorative plant spices, which it is, but it now covers our fields, pushing out endemic plant species, which in turn changes our pollinating insects many of which do not have any use for this new plant.
What is an invasive species?
500
A hypothetical population has a carrying capacity of 1,000 individuals and the rmax us 1.5. What is the population growth rate for a population of 1,500 individuals?
It will decrease by 1,125 individuals, since it over carrying capacity, dn/dt was negative.
(dn)/(dt)=1.5*1500((1000-1500)/1000)
500
Three variables that affect life history.
What is 1. when reproduction begins, 2. how often the organism can reproduce, 3. the number of offspring produce per reproductive episode?
500
Bees show each other a "waggle dance" in order to...
What is communicate?