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Give three possible reasons as to why heterotrophic bacteria biomass varies in the ocean.
What is the difference between Sulfur bacteria, which live in hydrothermal vents, and those, which are found deeper in the sandy intertidal? Please use equations.
Define âmixed layerâ and how its variation affects the phytoplankton community.
What is a HAB? Name two types of HAB.
What is the final possible amount of calories found in the sea-otter community if there is 1,000,000 total calories of primary producer (show trophic levels)? Assume the trophic efficiency of the open ocean. Write down the organisms and their trophic levels.
Given what you know about transfer of energy from one trophic level to the next, what can you conclude about the potential food-chain length in natural ecosystems?
A) There is no limit to the number of trophic levels in a food chain.
B) There is an upper limit to the number of trophic levels in a food chain, probably around 4â5.
C) There is an upper limit to the number of trophic levels in a food chain, probably around 10â20.
