BIOL 1108 Unit 1 Mount St. Helens | UPDATED Questions with
100% Verified Answers
Kennesaw State University • BIOL 1108
Q1: Species
A: organisms that can produce fertile offspring
Q2: Population
A: all of the individuals of a single species that interact/breed
The unit at which evolution acts
Q3: Community
A: all of the populations of living things that interact in a place
Q4: Ecosystem
A: biological community of interacting organisms and their physical environment
Abiotic and biotic factors
Q5: Abiotic Factors that Define Ecosystems
A: Climate
Averages and seasonality
Geology
Bedrock, water, soils, topography
Disturbance
Natural, human
Scale and frequency
Q6: Biotic Factors that Define Ecosystems
A: Biodiversity
Species Interactions (PredatorPrey, Mutualism, Commensalism, etc.)
Presence of Invasive or Keystone Species
Q7: Ecosystems cannot be defined by
A: size
boundaries
,Q8: Mt. St. Helens
A: Volcano that is part of Cascade Mountains that erupted in Washington state causing
massive damage in 1980
in temperate rainforest biome
Q9: PreEruption Mt. St. Helens Ecosystem
A: Old Growth forest
Never been logged
Diverse forests and species
Rich soils
Stimulated plant growth with lots of available nutrients
Heterogenous ecosystem that changed with elevation
temperate rainforest
Q10: PostEruption Mt. St. Helens Ecosystem
A: Forests scorched up to 17 miles from mt. st helens
Pumice Plain covered in ash so low nutrient levels in soil
Q11: Why do Mountain ecosystems have such high biodiversity?
A: As elevation increases, temp, O levels, precipitation levels, and biodiversity change and
the ecosystems change
Elevation and Latitude: Differences in elevation in an area allow multiple biome
Q12: Effect of the eruption of MSH being lateral?
A: Northern slopes decimated, but southern slopes relatively unaffected
Q13: Scorch Zone
A: outermost forest
defoliated trees
surviving ground vegetation due to snow on the ground
Q14: debris avalanche
A: riverbeds where melt water and mud was washed in
Q15: Pumice Plane/Pyroclastic Flow
A: closest to blast zone
Feet of volcanic ash (tephra/rock dust)
No life
small portion of the affected landscape
, Q16: Blowdown Zone
A: largest zone
Blast knocked over trees
Not much surviving ground vegetation
Q17: Spirit Lake
A: flooded with muddy ash water and logs
Murky water, limited visibility
Q18: What affects the order of reestablishment?
A: What can reach the area first?
By wind(spores/seeds)
What can survive there?
The first to survive there will be the first to reestablish
Q19: Plant Dispersal
A: how seeds/spores are spread from the parent plant
Purpose: increases chance of survival by limiting competition for resources (soil
nutrients..)
Methods: wind, animal, water, gravity
Q20: Wind Dispersal
A: A method of dispersal where lightweight seeds catch the wind
Long distances, random
Q21: Animal Dispersal
A: Seeds have hooks attached to them that attach to fur. Other seeds are eaten and pass
through the digestive tract. can be carried far distances but varies
Q22: Water Dispersal
A: Seeds fall into the water and float away
Splashes or long distance
Q23: Gravity Dispersal
A: Heavy nuts fall to the ground and roll
Example: Ballistic Dispersal
100% Verified Answers
Kennesaw State University • BIOL 1108
Q1: Species
A: organisms that can produce fertile offspring
Q2: Population
A: all of the individuals of a single species that interact/breed
The unit at which evolution acts
Q3: Community
A: all of the populations of living things that interact in a place
Q4: Ecosystem
A: biological community of interacting organisms and their physical environment
Abiotic and biotic factors
Q5: Abiotic Factors that Define Ecosystems
A: Climate
Averages and seasonality
Geology
Bedrock, water, soils, topography
Disturbance
Natural, human
Scale and frequency
Q6: Biotic Factors that Define Ecosystems
A: Biodiversity
Species Interactions (PredatorPrey, Mutualism, Commensalism, etc.)
Presence of Invasive or Keystone Species
Q7: Ecosystems cannot be defined by
A: size
boundaries
,Q8: Mt. St. Helens
A: Volcano that is part of Cascade Mountains that erupted in Washington state causing
massive damage in 1980
in temperate rainforest biome
Q9: PreEruption Mt. St. Helens Ecosystem
A: Old Growth forest
Never been logged
Diverse forests and species
Rich soils
Stimulated plant growth with lots of available nutrients
Heterogenous ecosystem that changed with elevation
temperate rainforest
Q10: PostEruption Mt. St. Helens Ecosystem
A: Forests scorched up to 17 miles from mt. st helens
Pumice Plain covered in ash so low nutrient levels in soil
Q11: Why do Mountain ecosystems have such high biodiversity?
A: As elevation increases, temp, O levels, precipitation levels, and biodiversity change and
the ecosystems change
Elevation and Latitude: Differences in elevation in an area allow multiple biome
Q12: Effect of the eruption of MSH being lateral?
A: Northern slopes decimated, but southern slopes relatively unaffected
Q13: Scorch Zone
A: outermost forest
defoliated trees
surviving ground vegetation due to snow on the ground
Q14: debris avalanche
A: riverbeds where melt water and mud was washed in
Q15: Pumice Plane/Pyroclastic Flow
A: closest to blast zone
Feet of volcanic ash (tephra/rock dust)
No life
small portion of the affected landscape
, Q16: Blowdown Zone
A: largest zone
Blast knocked over trees
Not much surviving ground vegetation
Q17: Spirit Lake
A: flooded with muddy ash water and logs
Murky water, limited visibility
Q18: What affects the order of reestablishment?
A: What can reach the area first?
By wind(spores/seeds)
What can survive there?
The first to survive there will be the first to reestablish
Q19: Plant Dispersal
A: how seeds/spores are spread from the parent plant
Purpose: increases chance of survival by limiting competition for resources (soil
nutrients..)
Methods: wind, animal, water, gravity
Q20: Wind Dispersal
A: A method of dispersal where lightweight seeds catch the wind
Long distances, random
Q21: Animal Dispersal
A: Seeds have hooks attached to them that attach to fur. Other seeds are eaten and pass
through the digestive tract. can be carried far distances but varies
Q22: Water Dispersal
A: Seeds fall into the water and float away
Splashes or long distance
Q23: Gravity Dispersal
A: Heavy nuts fall to the ground and roll
Example: Ballistic Dispersal
