Intro to Ecology
Obtain Energy by making their own organic molecules
What are producers or autotrophs?
Members of a single species living in one place at one time
What is a population?
What is a community?
Caribou, musk oxen, snowy owls and snowshoe hares are common animal in this area...
What is the tundra?
heat absorbing ability of some gases in the atmosphere is responsible for this...
What is the greenhouse effect?
all organisms that live in a particular place and the physical aspects of that place make up this...
What is a habitat?
processes that add individuals to a population
What are births and immigration?
these organisms disperse many seeds over a large area, are usually small plants and are fast growing
What are pioneer species?
living portion of the water cycle where water passes through plants and evaporates into the atmosphere through the process of...
What is transpiration?
molecules of chemical pollutants become increasingly concentrated in high trophic levels is called...
organisms that obtain their energy from the organic wastes and dead bodies are called this...
What are detrivores?
weather and climate affect populations are called....
What are density independent factors?
Term that describes two organisms living in the same area that will use different resources to avoid competition
What is competitive exclusion?
Type of bacteria that plays a significant role in the nitrogen cycle
What is nitrogen fixing bacteria?
habitat destruction, hunting, and introduction to invasive species are top reasons for mass extinction of species. What is the major cause of all three?
What is human activities?
What is acclimation?
The population size and environment can sustain over time is called...
What is carrying capacity?
Sequential replacement of species in a community after a forest fire is known as...
Place where nitrogen fixing bacteria live
What are soil and plant roots?
Group of organisms that have the highest known biodiversity on Earth
What are the insects?
Indicates an organism's position in a sequence of energy transfers
What is a trophic level?
a pattern of increase in number due to a steady growth rate
What is exponential growth?
Type of succession that would occur on an island that was formed from a volcanic eruption
What is primary succession?
loss of this species can unbalance an ecosystem
What is a keystone species?
Reason why pesticides like DDT still pose an ecological threat
What is they become increasingly concentrated at the top of the food chain?