Landcover is significant to the well-being of all Life on Earth.

I support this statement with this argument.

Landcover is a prominent component of the biosphere (the envelope of living organisms that exists on or in the terrestrial or oceanic surfaces, between the lithosphere and the atmosphere).

Landcover supports all terrestrial life by providing food and shelter.

Landcover is not a commonly used word. It is a word that has its origins in the Earth Sciences where a general term was required to describe all possible landscape surfaces.

The idea of a surface is important. Landcover is the surface that mediates the exchanges of energy and matter between the Earth's crust, the lithosphere, and the overlying atmosphere in which we will include our distant star, the Sun. In this interface we find the biosphere, the thin layer of living organisms of which landcover is the terrestrial component. The components of this surface, of landcover, are most commonly vegetation and soils, and much less commonly, the water of wetlands.

Landcover, because it is living, influences the exchanges of energy and matter between the lithosphere and the atmosphere. These exchanges of energy and mass are more familiarly known as the Hydrologic Cycle, the Carbon Cycle and the Nitrogen Cycle. Together this flow of energy to and from space and the cycling of elements comprises the Climate System and the Biogeochemical Cycles.

So great is the influence of Life on the direction and rates of energy flow and cycles of matter that if the Earth was observed by any intelligent organisms in the universe, the presence of Life could be inferred by the composition of the Earth's atmosphere and by its colour in the visible wavelengths of light.