Colony 7

This species of mushrooms in our 7th colony in this system generate only a few fertile seeds each season, together with a vast collection of symbiotic spores that support the seeds in their life cycle. Those seeds that survive nest in the warm blue sands where their parent lives. They grow until they become small winged versions of their parents and then fly off to start their own blue sand island, with the floating support of the symbiotic spores, where the cycle starts again.
The sand isn't really sand as we know it on Earth, it's a colony of very small creatures that live in symbiosis with the mushrooms and with their seeds and spores.
The humans respected and cared for this fragile ecosystem when they arrived to this planet. We see in the image one of the caretakers.

As always, this was rendered in Vue.

EDIT: a DD, wow! This was completely unexpected! Many thanks for cosmicbound for featuring it! This was my 11th DD.

EDIT June 3rd 2017: I made some changes to this image. I changed the lighting on the shrooms and added some details to the the water surface. If you want to see the original version, you can find it in the Scraps folder in my gallery. I'd love to hear your thoughts about the changes.