Unit 1
“Treeless, bitterly cold most of the year, winters are long and dark, low-growing plants, permafrost” are the characteristics of which biome?
Tundra
What do you call the process of wind and currents causing water to come up from the depths to the surface and bringing nutrients up from the bottom of the ocean?
upwelling
What area has the lowest net primary productivity per square meter?
open ocean
water vapor
CH4
CO2
Nitrous Oxide
Draw a line that demonstrates that the population has reached its carrying capacity.
s- curve
Mosquitoes feed off of human blood. This is an example of:
Parasitism
As pollution levels in streams rise, many aquatic insects such as the mayfly quickly disappear. The mayfly is considered what kind of species.
Indicator
When populations of two different species interact over long periods of time, changes in the gene pool of one species can lead to changes in the gene pool of the other.
coevolution
What is one of the root causes of environmental problems?
rapid population growth
What is Mrs. Judge's oldest son's name?
Liam
What are the sequence of secondary succession would be likely to occur in abandoned farmland in the eastern US.
Bare soil, grasses and wildflowers, shrubs, sunlight-tolerant trees, shade-tolerant trees
One way that species evolve over time to reduce niche overlap is called
Resource Partitioning
If grass stores 100 energy units received from the sun, the ecological efficiency of the ecosystem is 10%, and the trophic levels are grass → cow → human, how many units of energy does the human receive of the original 1,000 units?
.1
Why are decomposers in soils and water important to ecosystems?
They recycle nutrients.
What 2 statistics would most likely indicate the highest quality of life in a country?
High life expectancy and low infant mortality
Explain one impact that zebra mussels can have on aquatic ecosystems
Increased water clarity/transparency Mussels are filter feeders, removing solids from water as they feed. Increased light penetration in water column Remove suspended matter from water. Increased photosynthesis/primary productivity Results from increased water clarity. Increased populations of other species (certain fish, waterfowl, etc.) Results either from greater primary productivity (base of trophic pyramid) or greater ability of fish that are visual feeders to see their prey. Competition from zebra mussels for available resources Decreased populations of other species (mollusks, insects, etc.). Decreased populations of other species (mollusks, insects, etc.) Competition from zebra mussels for available resources. Altered water chemistry Mussels change biogeochemistry through filtering and digestion of food; shells sequester/store minerals. Disrupts food chains/trophic dynamics Eats food required by other species.
Identify the specific environmental problem that directly results from the decrease in pH of Earth’s oceans.
Ocean Acidification
What is NOT a factor that determines population growth under the theory of the demographic transition?
Density independent factors slow economic growth.
Global climate change occurs because increasing concentrations of greenhouse gasses in what layer?
The troposphere absorb outgoing IR radiation
If a population is growing at 2.75% per year, the population will double in appr. how many years?
70/2.75 = 25.45
Calculate the percent change in pH of the following data:
Initial pH = 9.10
Final pH = 9.07
Percent Change = ((Final pH - Initial pH) / Initial pH) x 100%
(( 9.07 - 9.1 ) / 9.1 ) x 100 = -.32 %
Identify an anthropogenic threat to coral reefs and describe how the threat damages the coral reefs and coral reef ecosystems.
Identify one economic impact on coastal communities that has resulted from rising sea levels.
• Decrease of tourist revenue • Decrease of property value • Increase in damage to property, land, or infrastructure requiring repair or replacement • Increase in insurance costs • Loss of agricultural land or aquaculture operations resulting in financial loss • Loss of fish nurseries in wetland areas leading to less revenue for commercial fisheries • Increase in jobs in infrastructure/construction to repair damaged structures and properties • Increase in costs associated with preventative measures (building sea walls, raising building, etc.)
Explain how subduction leads to volcanic activity.
when a denser tectonic plate (usually oceanic crust) sinks beneath another plate at a convergent boundary, the intense heat and pressure cause the subducting plate to melt, forming magma which then rises to the surface and erupts as volcanoes
Draw a graph displaying a J-curve and biotic potential then reaching carrying capacity.
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