why is the plant circumference of the camphor bush larger than the olive tree along the elevation gradient

There could be several reasons why the plant circumference of the camphor bush is larger than the olive tree along the elevation gradient. Here are a few possible explanations:

1. Environmental conditions: Camphor bushes may be better adapted to the environmental conditions along the elevation gradient, such as temperature, humidity, or soil composition. These optimal conditions may allow the camphor bush to grow larger and have a larger circumference compared to the olive tree.

2. Competition for resources: The camphor bush might be more efficient in utilizing available resources, such as water and nutrients, compared to the olive tree. This could enable the camphor bush to grow more vigorously and have a larger circumference.

3. Growth strategy: Different plant species may have different growth strategies. The camphor bush might invest more energy and resources in radial growth, leading to a larger circumference, while the olive tree may allocate more resources towards vertical growth or other purposes.

4. Genetic factors: Genetic variations between the camphor bush and olive tree could result in differences in growth patterns and overall plant size. The genetic makeup of the camphor bush may favor larger circumferences compared to the olive tree.

It's important to note that these explanations are hypothetical and may vary depending on the specific circumstances and ecological conditions of the elevation gradient in question. Further research and analysis would be needed to provide a more accurate explanation for the observed difference in plant circumferences.