Umwelten
I use umwelten as a background assumption. I use it roughly and mess up the distinctions between who does what to whom (paraphrasing wikipedia.org/wiki/Umwelt) :
from the German Umwelt meaning "environment" or "surroundings
The term is usually translated as "self-centered world"
Uexküll theorised that organisms can have different umwelten, even though they share the same environment
Umgebung (an Umwelt as seen by another observer), and
Innenwelt (the mapping of the self to the world of objects),
I mess up the last two because I like mumbing umwelten um umwelten as I type. The semiotic space where umwelt is often used interests me… —little. I suspect I should use Innenwelt more, but that is even more obscure.
Here is a link where is it used with more care:
Biologist Jakob von Uexküll (1864–1944)—pronounced “oox-cool”—elaborated on this idea, dubbing an organism’s environs its Umwelt, a bubble in which both space and time are wholly relative, experienced and navigated uniquely by each species depending on its morphology and sensory receptors. Umwelt, which simply means “environment” in German, is a crucial concept for modern ecology, and a necessary corrective to anthropic bias in human inquiry generally.
The poster child for Uexküll’s thesis is a tiny creature that Nature lovers are bound to encounter on any walk in the woods or gambol through the grass—the ubiquitous tick. (from Aristotle and ecology by M. D. Usher)
And a link which describes one umwelt in detail without using the word:
Understanding the minds of alien life-forms is not easy, but if you relish the challenge, you don’t have to travel to outer space to find it. Alien minds are right here, all around you. You won’t necessarily find them in large-brained mammals—whose psychology is sometimes studied for the sole purpose of finding human-ness in slightly modified form. With insects such as bees, there is no such temptation: neither the societies of bees nor their individual psychology are remotely like those of humans (figure 1.1). Indeed, their perceptual world is so distinct from ours, governed by completely different sense organs, and their lives are ruled by such different priorities, that they might be accurately regarded as aliens from inner space. What it’s like to be a bee by Lars Chittka
Consider the words:
landscape in comparison with umwelt above,
terrain and what landscape does to that,
what territory does in return to landscape thus composed
Every terrain can be some body’s landscape.
Every body can just be the terrain in another body’s landscape.
Like a tick on a lion, or lice on a lover.
And it is all a part of the world, in which the rocks of the earth are the smallest things we worry about.