SOLUTION GRADED A+
● What is peat? Answer: Peat is a type of soil composed of partially
decomposed plant material, typically found in wetlands and bogs, that
accumulates over time.
● What is permafrost? Answer: Permafrost is a layer of permanently
frozen soil found in polar regions, which can trap organic matter like
peat beneath its surface.
● What happens when peat burns? Answer: When peat burns, it releases
stored carbon dioxide and other greenhouse gases into the atmosphere,
contributing to climate change.
● Why is there so much peat that has not decomposed in the permafrost?
Answer: Peat remains undecomposed in permafrost due to cold
temperatures that slow down microbial activity and decomposition
processes.
● What conditions prevent decomposition of peat in the permafrost?
Answer: Cold temperatures, water saturation, and anaerobic conditions
in permafrost prevent the decomposition of peat.
, ● What is a carbon sink? Answer: A carbon sink is a natural or artificial
reservoir that accumulates and stores carbon-containing chemical
compounds for an indefinite period.
● How do zombie fires disrupt the flow of energy and cycle of matter in
Arctic ecosystems? Answer: Zombie fires burn carbon sinks like peat,
releasing carbon dioxide and disrupting the natural flow of energy and
matter by altering decomposition and nutrient cycling.
● What is the normal flow of matter and energy in ecosystems? Answer:
The normal flow of matter and energy in ecosystems involves the
transfer of energy from producers to consumers and decomposers
through food webs.
● What is the 10% rule? Answer: The 10% rule states that only about
10% of the energy from one trophic level is transferred to the next level
in a food chain.
● What is a positive feedback effect? Answer: A positive feedback effect
is a process that amplifies or increases the effects of a change, such as
increased carbon dioxide leading to higher temperatures, which can
further increase carbon emissions.
● How can we manage the matter and energy in fire systems? Answer:
Managing fire systems can involve prescribed burns, cultural burns, and
grazing to reduce fuel loads and prevent uncontrolled wildfires.