“…most of the living (biomass) and dead (litter) standing crop in wetlands at any given time is produced by macrophytes.” Yet in the same paragraph, the author states “…most of the organisms that are found in wetlands do not obtain their energy by eating macrophytes.” Explain this apparent contradiction

Your text states “…most of the living (biomass) and dead (litter) standing crop in wetlands at any given time is produced by macrophytes.” Yet in the same paragraph, the author states “…most of the organisms that are found in wetlands do not obtain their energy by eating macrophytes.” Explain this apparent contradiction