Habitat and Niche
A bird feeds on mice, small birds and snakes. It feeds mostly at dusk. It lives in the highest parts of deciduous trees. This is a description of a(n)
Ecological niche
Mongoose are introduced to a small island to control the population of rats. After 7 years, there are no more rats on the island, only mongoose. This is an example of
Competitive exclusion
A close ecological relationship between two organisms
Symbiosis
Individual organisms may live close together in groups in order to facilitate mating , gain protection or access food resources.
Clumped dispersion
The survivorship curve of whales would best be described as
Type I
A speciess of fox lives where the yearly average temperature is 45degrees F. There is little rainfall and the soil is very barren. There is usually snow on the ground for 6 months of the year. This is a description of
habitat
Three different birds use one particular species of pine tree as their habitat. Each species has a particular part of the tree that they use- One at the bottom, one in the middle, and the other tends to always be near the top. This is an example of
Niche Partitioning.
Two organisms interacting with each other, and both species benefit from the interaction.
Mutualism
Individuals are spread randomly within an area or volume
Random dispersion
This type of populationgrowth starts off very fast, and then slows down as resources start to dwindle. Eventually the population levels off at a certain level.
Logistic growth
A shark´s niche might be described as being a
Top predator on the coral reef
Large mouth bass are large predator fish in freshwater that hide and wait for smaller fish to swim by, then they lunge out and swallow the small fish in ambush. On coral reefs, Nassau grouper hide in the reef and rush out to ambush small fish that swim by. These fish live the same way but live in different places. They are called
Ecological equivalents.
An ecological symbiosis in which one species benefits and the other species is not affected.
Commensalism
Territoriality and intraspecies competition for limited resources leads to individuals living at a specific distance from each other
Uniform dispersion
When population increases dramatically over a period of time.
Exponential growth
What is the niche of an oak tree?
It grows in the forest, produces acorns that feed many different organisms, provides habitat for birds, insects, etc.
Maple trees and sweet gum trees may live in the same area, trying to survive in the same places. This is an example of
Competition
A vine growing up a tree and choking out sunlight for the tree is an example of
Parasitism
Population density can be expressed as a ratio between what?
#of individuals divided by a certain size area.
The establishment and development of an ecosystem in an area that was previously uninhabited.
Primary succession.
What is the niche of fungus in the forest floor in Virginia?
To break down dead and rotting tree leaves, dead animals, etc. and return those nutrients to the soil.
A python snake hides in a tree and suddenly lunges out and catches a monkey, kills it and eats it. This is an example of
Predation.
What type of symbiosis exists between a dog and his owner?
Mutalism
The survivorship curve of a maple tree would be
Type III
What kind of a limiting factor to a population are natural disasters? Density dependent or density independent?
Density Independent