What percentage of the solar energy that reaches the marsh is incorporated into gross primary production?

5.8 % of solar energy will be incorporated into gross primary production.

Explanation:

Ecological efficiency is defined as the amount of energy transfer from one trophic level to the next trophic level.  In a ecosystem autotrphic organisms produce the organic energy from solar energy. According to the thermodynamics, there is no 100 % energy producer and consumer. That means some amount of energy is missing from one trophic level to the other.

In the ecosystem only 10% of energy is transferred from one trophic level to the next and production ratio is varying in different ecosystems. for example, grassland has higher gross production that an aquatic system.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.