Ecologists typically model patterns among trophic levels by drawing pyramids. the general name for these pyramids are ecological or trophic pyramids. one more specific type of pyramid is called the pyramid of biomass. this pyramid shows all the biomass at different trophic levels at one point in time. because this ecosystem has only two trophic levels (algae and catfish), it can be represented with a two-tiered pyramid. what ideas do you have about the structure of the biomass pyramid in this pool based on what you already know?

The algae's trophic level in the biomass pyramid will be higher than the catfish's. This is because the amount of food available for the consumers, in the case the catfish, will be limited by the biomass of the algae and, since about 80 to 90% of the energy gets lost between trophic level, the biomass of the catfish will be smaller that the algae.

the transfer of energy between two molecules spaced just nanometers apart plays a key role in many technologies, including photovoltaics, quantum information systems, lighting, and sensors, as well as in biophysics to measure nanometer distances and in photosynthesis. but an open question in this area is what effect, if any, the surrounding photonic environment has on this nanoscale energy transfer. by designing and performing a carefully controlled experiment to answer this question, scientists have settled the debate and found clues to improving the efficiency of many of the technologies that rely on this process.

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