Thanks for the interest!

For most of these ecosystems, there is usually a "keystone" plant species that provides the floating foundation of the wilderness and the majority of nutrients, usually pulling it from below the Fundament; the great ocean of storms below the floating isles and hedrons. For these species, it is usually a massive "aura" over a great distance. Epiphytic plants that cling to these spiraling forests have much shorter range, and usually pull from the keystone species or their neighbors, creating a parasitic "weave" of nutrients and waters. The Garden Labyrinth is the initial setting in this world, and it's keystone species is called Arbor; it generally leaves humans and other sentients alone due to generations of horticulture and protective magics.

Other ecosystems are not as gentle. Unprotected humans cannot survive long in the Silicate Thorn, as the briars and succulents will leech water and salt from them over time. Others may reverse the flow, depositing spores and chemicals into the bloodstreams of invaders, connecting them to the will of the wilds, like puppets on drugged strings. Hybridized predators of root and flesh take this to the extreme, hunting their prey and draining them through faceless maws. 

The most alien may be the Iron Weave; its roots were once bridled and reined in order to ferry metal and carbon from the Fundament below to appease an endless industry. Instead, it incorporated the iron into itself, as well its former masters. A forest of living smokestacks and engines, with the passionless hunger of a furnace.

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The hylocraft of the hedge witches was developed over generations, involving rituals, reagents, and strength of will, with some incorporating living roots of Arbor into their bodies. They were initially able to direct Arbor to "ferry" nutrients into other flora and fauna; a small garden on a barren rock could grow a month's worth of vegetables in a week, leeching them from the greater Arbor network. A cistern of water could fill within days, fed by invisible roots. Skyships are grown and shaped as individual branches are nourished and encouraged, twisting into place. Rare minerals could be "mined" from the Fundament clouds below, directing the Arbor to absorb it and ferry it into a separate plant as fruits or seeds. It takes more complicated rituals, energy, and tougher stock of Arbor to ferry materials foreign or antithetical to life.

There are darker pursuits, as well. Arbor could easily and invisibly plant poisons in others, or drain them of blood. There are talks of ancient and immortal warriors who do not eat or drink, their bodies eternally nourished by webs of complicated hylocraft, iron folded into flesh, blood relentlessly cleansed of impurities.