Ecologists can make predictions using ecological models.
The growth of cities and shburbs can result in habitat fragmentation
Acid rain, dissolved carbon dioxide in oceans, and the thinnning of bird eggshells due to DDT are all examples of pollution threatening biodiversity
Carbon dioxide, methane and water vapor trap light evergy
Carbon dioxide is helpful when it is high in the atmosphere, but is harmful to human health when it is close enough to the ground for people to breath
Corn planted in a field that has been previously planted with legumes and then plowed under is likely to be
more productive because bacteria living on hte roots of legumes fix nitrogen in the soil
All of the interconnected feeding relationships in an ecosystem amke up a food
the total amount of living tissue within a given trophic level is called the
what goes in Box 5 of the fod web in figure 3-2?
What are the three kinds of ecological pyramids?
energy, biomass, and numbers
Only 10% of the energy stored in an organism can be passed on to the next trophic level, Of the remaining energy, some is used for the organism's life processes, and the rest is
eliminated as heat
Matter can recycle through the biosphere because
biological systems do not use up matter, they transform it
Which part of figure 3-3 shows transpiration?
B on the right
Organisms need nutrients inorder to
carry out essential life functions
The movements of energy and nutrients thru living systems are different because
energy flows in one direction and nutrients recycle
Biogeochemical cycling ensures that
nutrients will not reach toxic concentrations in the biosphere
Why cant the producers in some ecosystems make an unlimited supply of organic material?
One or more nutrients are in short supply
Phosphorus is very important fo rliving things because living organisms need phosphorus to
Form DNA and RNA
WHat is at the base of all ecologgical pyramids?
which of the following occurs during the cological succession of an ecosyustem?
living organisms modify their enviroment a little at a time
which is a factor that oculd interrupt the progress of succession?
another natural disturbance
an exaple of a human caused disturbance is
aquatic organisms are affected by all of the following except
distance from another body of water
During some kinds of population growth, the size of each generation of offspring is larger than the generation before it. So as the population gets larger, it grows more quickly
How are phases 1 & 2's logistic growht similar?
the emigration rate is higher than the immigration rate during both phases
Whihc will reduce competition within a species' population
Water lilies do not grow in dosert sand because water availability to these plants in a desert is
a limiting factor
A major factor that engatively affects biodiversity is
Which is a biotic factor that affects the eize of population in a specific ecosystem
type of soil in the ecosystem
During a long period when there is no rainfall, a mountain lion may temporarily leave its usual hunting territory to drink from a farm pond
the change in an abiotic factor in its enviroment
which is an example of how biotic and abiotic factors interact
Tree roots split apart rocks in the ground
The greehouse effect is
A natural phenomenon that maintains Earth's temperature range
The tendency for warm air to rise and cool air to sink results in
global wind patters
What is one difference between primary and secondary succession
Secondary succession begins on soil and primary succession beings on newly exposed surfaces