Flashcards in Lecture 33/34-Ecosystem Ecology & Conservation Ecology Deck (40):
Sum of all the organisms living within its boundaries and all the abiotic factors with which they interact.
Ecosystem dynamics involve:
Energy flow and chemical cycling
What are the 5 different trophic levels?
Primary producers, primary consumers, secondary consumers, tertiary consumers, and decomposers
Ultimately support all others within ecosystems.
4 examples of primary producers are:
Autotrophs, plants, algae, and photosynthetic prokaryotes
Carnivores eating herbivores
Carnivores eating carnivores
Consumers that get their energy from detritus and detritivores.
What is detritus?
Nonliving organic materials
What are detritivores?
Prokaryotes and fungi
Primary production is the amount of light energy converted into chemical energy by:
How is primary production measured?
Energy per unit area per unit time OR biomass added to the ecosystem per unit area per unit time
Primary production sets __________ __________ on ecosystem complexity.
Gross primary product
Net primary production
Only _____ is available to consumers.
Which ecosystem has high NPP?
The amount of chemical energy in consumer's food that is converted to their own new biomass during a given time period.
How efficient the organism is at energy transformation is measured by what?
Energy transfer between trophic levels is only about _____% efficient.
Percentage of production transferred from on trophic level to the next.
Chemical elements are available only in:
These are only available in limited amounts:
Chemical cycle which involves both biotic and abiotic components of ecosystems.
Gaseous forms of carbon, oxygen, sulfur, and nitrogen in the atmosphere:
Phosphorus, potassium, calcium (too heavy).
Human alteration of habitat.
Species that humans move (intentionally or accidentally) from species' native locations to new geographic locations.
Human harvesting of wild organisms at rates exceeding at ability of populations to rebound.
Overexploitation lead to loss of:
Our sense of connection to nature and other forms of life.
All the processes through which natural ecosystems help sustain human life on earth.
Exceptional concentration of endemic species and large numbers of endangered and threatened species.
National parks, state parks.
Extensive undisturbed regions surrounded by areas that have been changed by humans and are used for economic gain.
Use of organisms to detoxify polluted ecosystems.
Use of organisms to add essential materials to a degraded ecosystem.