What may impact the survival of subs aside from soil contact?

The survival of subs, which typically refers to the juvenile forms of certain organisms like insects or amphibians, can be significantly influenced by moisture levels. Moisture plays a critical role in their habitat as it directly affects their physiological processes, including respiration and hydration. For many species, the availability of moisture is essential to prevent desiccation, particularly for those that are sensitive to environmental conditions.

Moisture levels can also impact the nutrient availability in the surrounding environment, which might influence feeding opportunities as well. In aquatic or semi-aquatic ecosystems, the level of moisture can determine the habitat's stability and the overall health of the ecosystem. If moisture levels drop too low, it can lead to an increase in mortality rates among juveniles that rely on these conditions for survival.

While other factors mentioned may also play a role in the overall health of juvenile organisms, moisture levels are critical and often foundational to their survival, particularly in environments where they are adapting to terrestrial or transitional conditions.