Population Growth
First 2 groups will answer separately:
1.Describe logistic growth in a population.
2. Describe exponential population growth.
1. Population growth that slows as it approaches carrying capacity- s curve
2. Population size increases rapidly without limits- j curve
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 are the 3 methods ecologists use to help study concepts in ecology.
Observation
Experimentation
Modeling
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 biome is
A group of ecosystems that have the same climate
What is the term for a close and long-term relationship between two species?
symbiosis
Which of the following does not require sunlight to live
photosynthetic bacteria, chemosynthetic bacteria, trees, algae
chemosynthetic bacteria
What is an example of a density-dependent factor affecting population growth?
(what factors depend on how many individuals there are in the population?)
Competition, Predation, parasitism and disease
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
Give an example of mutualism
clownfish and sea anemone
A species that is very important to the community and can help stabilize the population.
keystone
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
Give an example of commensalism
barnacles on a whale
A bird stalks, kills, and eats an insect. Based on its behavior, which ecological terms describe the bird? (2)
Carnivore, consumer
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 that live in the same 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 parasitism
Parasitism: tick on a dog
What do the arrows represent on a food web or food chain, and in which direction should they point ? (to and from)
The arrows represent the flow of energy from one organism to the next. Arrows should point from on organism to the organism that is getting the energy (the one who is eating the organism)