Chapter 55: Dynamic of Ecosystems Flashcards
What is the difference between and ecosystem and community?
ecosystem= community + abiotic component
Chemical cycling and energy flow are different because…?
Chem cycling = closed system
Energy flow= open system
What are the two forms of usable energy?
lights and chem bonds
First Law
Energy is not created or destroyed just changes form
Second Law:
when energy changes form, partial energy is lost as heat
HOw can you use productivity to describe trophic levels
rate at which organisms in the trophic level collectively synthesize organic matter
Primary productivity
productivity of primary producers
GPP
rate at which produces synthesis new organic matter
NPP
the GPP minus the rate of respiration
Secondary Productivity
the productivity at heterotrophic levels which is measured by individual growth and respiration
How can you use biomass to measure trophic levels?
the amount of organic matter present at a particular time
ecological Pyramids
diagrams that illustrate the lost of energy between trophic levels
Inverted pyramid
occur only when the primary producer has a high turn over rate characterized by rapid reproduction and rapid consumption by the predator ()PLANKTON)
Biogeochemical Cycles
the cycle in which chem elements or compounds go through their abiotic environment, including the process that makes it possible
What are the resevoirs of the water cycles?
atm, ocean, lake, river, aqua
