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7) Ecosystems 2: Carbon Cycle
Terms in this set (11)
outline the carbon cycle as it would be without human impact
biogeochemical cycling: carbon cycle depends on photosynthesis and cellular respiration- return of CO2 to atmosphere by respiration closely balances removal by photosynthesis (ideally)
explain how human activities upset the balance of the carbon cycle
emissions from fossil fuels (the burning of fossil fuels)
land use change- destroying the tropical rainforest
caused by humans!
understand the data shown by the Keeling Curve and explain how it relates to global temperature trends
The Keeling Curve is a graph which plots the ongoing change in concentration of carbon dioxide in Earth's atmosphere since 1958.
understand the role of greenhouse gases and the natural greenhouse effect
The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere. greenhouse gases absorb outgoing energy and re-emit it back to the earth
explain pollution's impact on earth's climate
effects of increasing atmospheric CO2: pollution impact: co2 has a bigger impact because there is more of it
impact on warming climate:
increase in more severe storms
polar ice caps melting
sea levels rise (displacement of sea islands)
explain how positive feedback can speed the effects of global climate change
Ocean warming provides a good example of a potential positive feedback mechanism. The oceans are an important sink for CO2 through absorption of the gas into the water surface. As CO2 increases it increases the warming potential of the atmosphere. If air temperatures warm it should warm the oceans. The ability of the ocean to remove CO2 from the atmosphere decreases with increasing temperature. Hence increasing CO2 in the atmosphere could have effects that exacerbate the increase in CO2 in the atmosphere.
Likewise, the increase in temperature would permit more water vapor to be stored in the atmosphere. The amount of water vapor the atmosphere can hold increases exponentially with temperature so increases in temperature can yield increases in atmospheric water vapor. The increased water vapor, as a greenhouse gas, enhances the greenhouse effect and could lead to further warming
describe the impacts of global climate change on sea levels
sea levels rising
describe the impacts of global climate change on coral communities. extrapolate on how it can impact other communities and ecosystems
Most corals are made
up of hundreds to
hundreds of thousands
of individual coral
polyps like this one.
relationship with coral
Stony corals grow when
individual polyps lift themselves up from the
base of the stony cups in which they reside
- when the coral becomes stressed the algae leaves, which leaves the coral bleached and vulnerable
compare and contrast coral bleaching with the impacts of ocean acidification
ocean acidification: impact of extra CO2 in the ocean. gases in atmosphere exchange where air and water are in contact-gases dissolved into ocean- leads to extinction of coral reefs
estimate your ecological impact and determine what you will do to lessen your impact on earth's resources. what steps will you take?
understand the concept of biocontrol and explain how/why biocontrol of invasive species can lead to unintended consequences (refer to extra slides in folder)
example slide of unintended consequences (in desktop folder)
THIS SET IS OFTEN IN FOLDERS WITH...
1) Descent with Modification
2) Mechanisms of Evolution
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