1. What factor controls the amount of humus you find in an area?
For this question i think the factor is precipitation. Is that correct?
2. Why do vegetation change with increasing elevation?
please help. thanks in advance.
http://www.google.com/search?hl=en&rls=com.microsoft%3Aen-us%3AIE-SearchBox&rlz=1I7SUNA&q=humus+precipitation&btnG=Search
There may be information in here that can help.
In response to your second question, temperature and water availability would be two factors.
I hope this helps a little more. Thanks for asking.
1. The amount of humus in an area is influenced by several factors such as climate, vegetation type, and soil characteristics. While precipitation can indirectly affect the amount of humus by influencing the growth and decay of vegetation, it is not the sole factor controlling humus levels. Other factors such as temperature, organic matter input, and soil pH also play important roles in the formation and decomposition of humus.
To get a more comprehensive understanding of how precipitation affects humus levels, I would recommend conducting a search using a reliable search engine like Google. By typing in keywords like "humus precipitation," you can find articles, research papers, or educational resources that delve into this specific topic. You may find information on the relationship between rainfall patterns and humus accumulation, as well as how variations in precipitation can impact the decomposition rates of organic matter.
2. The vegetation changes with increasing elevation due to changes in temperature, moisture availability, and other environmental factors. As elevation increases, temperature generally decreases, leading to different climatic conditions. These changes in climate can directly affect the suitability of certain plant species to thrive, resulting in shifts in vegetation composition.
Additionally, moisture availability also plays a crucial role in vegetation patterns along elevation gradients. Higher elevations often experience more rainfall or snowfall, leading to increased moisture levels. Conversely, lower elevations may be subject to more drought conditions. These variations in moisture availability can favor different types of plants that are adapted to wetter or drier conditions.
To explore this topic further, you can conduct an online search using keywords such as "vegetation changes with elevation" or "effect of elevation on plant communities." This will provide you with relevant sources, such as scientific articles or educational materials, that explain in more detail the specific mechanisms driving vegetation changes along elevation gradients.
Remember to critically evaluate the sources you find to ensure their reliability and accuracy.