Idk how many marks this is for but for a short short answer something like: In the Sydney Olympic Park Intertidal Wetlands, nutrient cycling is an ecological process which ensures ecosystem health through providing a biologically fundamental transfer of energy across trophic levels. For example, a biogeochemical cycle between the nutrient-rich mudflats and the roots of the wetlands' Grey Mangroves allows nutrients to enter the food chain which, when combined with thermal energy from the sun, enables Mangroves to undergo photosynthesis - promoting growth and eventual decay. In turn, an approximate 250 tons of mangrove detritus is spread across the wetlands - providing a nutrient-rich energy source for the entire ecosystem through its transportation via tidal flows, a process which supports the zonation of Eelgrass, Saltmarsh and small crustaceans such as Mud Crabs.