Biogeochemical Cycles and Energy Flow

Front

Major role of detritivores in ecosystems:

Back

Recycle chemical nutrients for autotrophs.

Front

Most vulnerable trophic level to extinction?

Back

Tertiary consumer level

Front

Energy transfer in food chain: grass → grasshopper → mouse → snake → hawk. Energy available to hawk from grass?

Back

0.01%

Front

Reservoir for carbon in the carbon cycle?

Back

All of the above

Front

Phosphorus enters ecosystems through:

Back

rock weathering

Front

Figure 42.2 shows a terrestrial food web. Combined biomass of C + D is:

Back

less than the biomass of A + B

Front

Energy flow in aquatic food chain:

Back

plankton → sand eel → striped bass → cod

Front

Carbon cycle diagram: Which arrow shows CO2 release via combustion?

Back

arrow 1

Front

Element moving through all parts of the cycle?

Back

nitrogen

Front

Sequence in the carbon cycle:

Back

respiration → photosynthesis → organic decay → coal formation