Nitrogen fixation by cyanobacteria in coral reefs can fix twice the amount of nitrogen than on land around 1.8 kg of nitrogen is fixed per hectare per day.

Today there are 13 buildings remaining on the palace grounds and 28 pavilions in the gardens, occupying 110 acres (45 hectares) in all and the area is designated as Historical Site No.

And this particular place, the Medes Islands Marine Reserve, is only 94 hectares, and it brings 6 million euros to the local economy, 20 times more than fishing, and it represents 88 percent of all the tourist revenue.