Which slope aspect is likely to have the highest density of vegetation?

The north-facing slope is likely to have the highest density of vegetation due to several key factors related to sunlight and moisture retention. In many regions, particularly in the northern hemisphere, north-facing slopes receive significantly less direct sunlight compared to south-facing slopes. This reduced exposure to the sun results in cooler temperatures, which can support a more diverse and denser array of vegetation, particularly in areas where moisture is more readily available.

These slopes tend to retain moisture longer because they do not dry out as quickly as those that receive more direct sunlight, especially during the warmer months. Moreover, the cooler conditions can create an environment favorable to shade-tolerant plant species, allowing for a richer undergrowth. The combination of increased moisture retention and decreased evaporation on north-facing slopes consequently leads to more lush and dense vegetation.

In contrast, other slope aspects, such as south-facing slopes, typically experience more sunlight and increased evaporation rates, potentially leading to drier conditions and less dense vegetation. East and southwest slopes receive varying levels of sunlight but do not consistently provide the same moisture retention benefits as north-facing slopes, especially in hot climates. Therefore, the unique characteristics of north-facing aspects make them particularly conducive to high vegetation density.