Impacts of eutrophication on bedding sites and impacts of clear-cutting woody debris on animal movement

I have been observing two phenomena that trouble me when I consider them from the perspective of the animals.

One of them refers to the dense growth of nitrophilous species such as stinging nettles in ecotone habitats as well as in woodlands (and, for the matter, some grasslands).

I cannot imagine that it is easy for a species like roe deer or red deer to bed on nettles (or even to move through the growth in order to reach the deeper woodland for the stinging nettles can reach great heights in some places).

There are areas with little choice but nettles as the surface cover and I have been wondering how the spread of nettles impacts the bedding (cover, shelter) choices in wild species, especially when it comes to raising their young who need to remain hidden in taller vegetation which often consists of stinging nettles and nought else.

I have not encountered much information regarding the impact of stinging nettles on wild animals’ skin but there are the more vulnerable areas (around muzzle, the belly etc.) that are likely affected and cause at least discomfort.

Additionally, I have passed through some areas where clear-cutting has been performed leaving behind a thick matt of smaller woody debris (branches, twigs etc.).

I found it very difficult to cross this area and in many spots my legs got stuck between pieces and it would have been possible to twist an ankle.

There might be some animals that benefit from it (a hiding place for smaller species) but, e.g., roe deer and red deer would have trouble passing over such areas.

For young animals it could cause injury (or for animals that have been spooked or that are attempting to escape predators).

The practice of leaving small deadwood is probably better than leaving no deadwood at all but the stumps, roots, branches etc. do not form a natural ground cover and the cleared areas are often extensive.

I wonder how this affects animal movement.