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EES 100 UMaine - Exam 2 Flashcards _ 2024 QUESTIONS WITH LATEST ANSWERS.pdf
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8/13/24, 7:50 AMEES 100 UMaine - Exam 2
Jeremiah
zlett
Terms in this set (71)
What does an ecosystem consist of? biotic and abiotic components, which contribute to regulating the ecosystem
Ecosystems are both ____ and _____ Dynamic and persisting
convert energy in sunlight into chemical energy (sugars support all other organisms
What do primary producers do?
through food chain), also take (more) CO2 than they make
What is eutrophication? Excessive nutrient input into a pond/lake, causes algal blooms
What are the four types of ecosystem provisioning, regulating, cultural, supporting
services?
What is a provisioning ecosystem service? Wood
What is a cultural ecosystem service? Hiking
What is a regulating ecosystem service? Clean air and water
What is a supporting ecosystem service? Biodiversity
What does homeostasis mean? Maintaining a stable internal environment
No, there is lots of change in an ecosystem in homeostasis but overall, the ecosystem is
Does homeostasis mean no change?
stable
What is ecosystem self-regulation driven by? Interaction of reduction and growth factors
What does species diversity improve? Ecological resilience
What does an invasive species do? Alter ecosystem homeostasis
Are natural disturbances bad for Not always, they help maintain homeostasis
ecosystems?
What are the two most important Bipedalism and increased brain size
developments in human biology?
Hunter-gather
What three phases did humans evolve in
Agricultural
culturally?
Industrial
What is the Haber-Bosch process? production of fertilizers by combining nitrogen and hydrogen to synthesize ammonia
What came from the 1st Green Revolution? Increased agricultural yields through the creation of high yield mono-cultured plants
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