Energy Transfer
The level with the least amount of available energy because of the loss energy through metabolisms in each of the lower trophic levels
Fourth trophic Level
The amount of energy transferred from one trophic level to the next.
What is 10%?
Which of the following is a limiting factor in a population of organisms?
A. reproductive replacement
B. life spans of the members
C. Fluctuations in atmospheric temperature
D. Availability of food
D. Availability of food
The permanently dark zone of the ocean
Aphotic Zone
If a shark population is being targeted by humans what is a possible impact of this on marine biodiversity?
less sharks will cause a reduction in the food chain, overpopulation of their prey, reducing lower food levels
The organism that receives the least amount of energy from the producers.
What is the Hawk?
The removal of what species would cause an immediate decrease in the amount of energy flowing through a system?
Producers
If a population grows larger than the carrying capacity of the environment, what will happen to the population.
Death rate may rise
Turbidity refers to
clarity of water
What will happen to biodiversity if a nonnative or invasive species is introduced into an area?
decreases
Explain the reason for the higher concentrations of food contaminants in birds of prey.
chemical contaminants are stored and magnified in organisms higher up the food chain.
The movement of energy and nutrients through living systems are different because
energy flows in one direction, nutrients recycle
Water lilies do not grow in desert sand because water availability to these plants in a desert is, what type of factor?
A limiting factor
pH of water has decreased to below to 5.0 due to an increase in acid rain. What will most likely be the result?
Decrease in several fish populations
Why do biologists want to removal the burmese pythons from the everglades? What are they doing to native organisms?
they prey on native organisms and cause native populations to decline
Producers are at the bottom or beginning of a food chain because.
Producers convert light energy into food
What would most likely happen if the decomposers are removed from the carbon cycle?
If an organism is introduced to a land where it has no natural predators and an abundant food supply, what would happen to its population?
the population will grow to a larger size
The warmer the water the less of what nutrient is present?
dissolved oxygen
New fuels are being produced by converting corn and grasses into compounds containing alcohols that can be broken down for energy in various engines. The purpose of this research is to
reduce the use of nonrenewable resources
Why are pesticides said to "move up the food chain"?
top predators accumulate the pesticides contained in the bodies of their prey
Only a small amount of the energy stored in food is available to the next organisms in a food chain because
For most populations that are growing, as resources start to become less available, the population
a. declines rapidly
b. increases more rapidly
c. reaches carrying capacity
d. enters a phase of exponential growth
c. reaches carrying capacity
Increased nutrients in the water is called what?
Eutrophication
The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that
ecosystems are interconnect and human action can alter ecosystem equilibrium