Population Growth
First 2 groups will answer separately:
1.What is logistic growth in a population?
2. What is exponential population growth?
1. Population growth that slows as it approaches carrying capacity
2. Population size increases rapidly without limits
What is the simplest grouping of more than one kind of organism in the biosphere is a(n)
community
All the members of a particular species that live in the same area
population
Name the 3 types of symbiotic relationships
Mutualism, Parasitism, and Commensalism
What does geographic range refer to in ecology?
The area where a species can be found
What is NOT an abiotic factor that affects population size?
Water availability, sunlight availability, temperature, availability of food.
availability of food
Which term describes a linear feeding relationship between organisms, with arrows indicating the direction of energy flow?
Food Chain
An organism's niche is
the role the organism has in that specific environment
What is the term for a close and long-term relationship between two species?
symbiosis
Select all that apply: Which of the following are density-dependent limiting factors?
Competition for resources, disease, predation, and natural disasters.
Competition for resources, disease, predation
What is an example of a density-independent factor affecting population growth?
natural disasters, hurricanes, droughts, etc.
The interconnected food relationships in an ecosystem are called?
food webs
What is an ecosystem?
A community of living organisms interacting in a specific physical and chemical environment
According to the competitive exclusion principle, why can't two species occupy the same niche?
One species will outcompete the other for resources.
What is the effect of a keystone species on its ecosystem?
It plays a critical role in maintaining the structure of an ecosystem
Helps stabilize or control a population
What is carrying capacity in an ecosystem?
The maximum population size that the environment can sustain indefinitely
How does Energy flow within an ecosystem? Where does it start and then where does it go (specifically)?
energy flows in one direction from the sun to autotrophs to heterotrophs
Ecology includes studying at different levels (biosphere, ecosystem, population, biome, community, species). List these levels from the narrowest, most specific on top to the widest, broadest level on bottom.
species
population
community
ecosystem
biome
biosphere
Predator prey relationships can be used to regulate
population
Which of the following are examples of human impacts on ecosystems?
a. urban development
b. natural selection
c. photosynthesis
d. pollution
e. deforestation
a. urban development
d. pollution
e. deforestation
What are the 4 factors that affect the growth rate of a population?
Birth rate
Death rate
Immigration
Emigration
What is the roles of producers and consumers in the ecosystem?
producers: They produce their own food through photosynthesis.
consumers: They obtain energy by eating plants or other animals.
What is the difference between the community level and the ecosystem level in ecology?
A community consists of various species/ populations that are living in the same geographic area, where an ecosystem is a community of organisms in an area along with their physical environment.
Give one real world example of each of the 3 symbiotic relationships.
Answers may vary:
Mutualism: Clown fish and sea anemone
Parasitism: tick on a dog
Commensalism: barnacles on whales
How does age structure affect population growth?
It determines the reproductive potential of the population (how many males/ females exist and at what age)