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Bio 1306 Final Pt. 2

Terms in this set (79)

Which of the following statements is false?
Rain and snow of low pH (acid precipitation) is a direct consequence of warmer temperatures associated with climate change
Mark each of the following statements about the MacArthur/Wilson Island equilibrium model as T/F?
1. as a number of species on an island increases, the rate of local extinction goes down.
2. as the number of species on an island increases, the successful immigration rate to the island decreases.
3. a small island will have a lower immigrant rate for new species in a similarly located large island.
4. Islands closer to the mainland have higher extinction rates and distant islands
FTTF
Which statement is false?
Increased CO2 and atmosphere cost the recent appearance of the "ozone hole"
Which of the following statements about r/K Life histories is correct?
K-selected species typically provide significant care for their offspring
This process likely causes the observed high concentrations of toxic chemicals in fish-eating birds.
Biological magnification
Which of the following statements about populations is/are false? (select from a-e)
1. populations are more likely to have a clumped distribution than a random one.
2. All species we know of stop growing when they reach the environmental carrying capacity.
3. the process of "demographic transition" applies only to humans and not to other animal species.
4. resource competition is a common density-dependent factor for most populations as population density increases.
5. immigration rates are interesting, but do not impact population demographics
2 & 5
Why is net to primary production (NPP) a more useful measurement to an ecosystem ecologist interested in trophic energy transfer then gross primary production (GPP)?
NPP represents the stored chemical energy that is available to consumers in ecosystem
Biologist have long been curious about factors related to species richness. Which statement is false
Species richness is usually maximum at intermediate habitat size
Which of the following are considered the three major threats to global biodiversity? (select from a-e)
1. predatory-prey cycles
2. habitat loss
3. parasitism
4. invasive exotic species
5. human overexploitation
2, 4, 5
Which of the following statements is/are false? (select from a-e)
1. aquatic biomes are defined by the types of plants living in the water
2. terrestrial plans are rarely nitrogen limited because 78% of air is nitrogen gas
3. the atmosphere is not a major reservoir of an organic carbon
4. photosynthesis and respiration are important factors impacting the carbon cycle
5. in aquatic environments the thermocline separates the warm surface layer from cooler water beneath.
1, 2 and 3
Recall that Clement's "equilibrium" view of biological communities is that of a highly predictable and interrelated structure, while Gleason's "non-equilibrium" view of biological communities is that individual species operate independently and controlled more by random factors. If we set up many identical sterilized ponds in the same area and allow them to be naturally colonized, what result would we expect Gleason (non-equilibrium) had a more accurate view of communities than did Clements (equilibrium)?
Different plankton communities will develop in all ponds
As climate changes because of global warming, species' ranges in the northern hemisphere may shift northward. The trees that are most likely to avoid extinction in such an environment are those that
Have seeds that are easily dispersed by wind or animals
Which of the following statements about human population growth is/are false?
1. the human population age structure of Afghanistan (like that most of the developing world) is pyramid-shaped, indicating rapid population growth
2. at the current grade of growth of 1.12% per year, the population of earth is projected to reach 15 billion in <70 years
3. most of the projected population increase in the next century will take place in developed countries like the USA because the strong economies and high standards of living will support additional people.
4. the level of resource utilization by residents of the USA is much larger than the size believed to be sustainable for the entire world
5. the recent decline in human population growth rates is thought to be related to the fact that we are quickly approaching carrying capacity and resources are now limiting
3, 5
Mark each statement as T/f?
1. bioremediation is the process of using plants or lichens to remove contaminants from a polluted environment
2. adding nitrogen-fixing plant species to enrich overexploited areas is an example of biological augmentation
3. About half of the solar energy reaching earth is captured by terrestrial plant communities
4. the rate of decomposition, unlike that of net primary production, is not influenced by temperature
TTFF
And mountainous of western North America, north-facing slopes would be expected to
Be cooler and more moist than a comparable southern exposed slopes
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