Answer:
The elephants are the keystone species in this ecosystem.
Explanation:
The elephants' job is to knock down trees from time to time to get food from tall stock. This prevents the trees from overpopulating and allows shrub lands to stay in place. This is important as herbivores can continue to graze in large herds and carnivores can continue using the same hunting strategies with little to no push backs by trees.
This makes to elephants a keystone species as without them, the foundation species will decrease in population and create a whole different ecosystem with the trees as the new foundation species.
Answer:
There are several hypotheses as to why Earth's climate changed: an ice age and a meteor collision are two. Regardless of why the climate changed, dinosaurs could not adapt to a new environment to avoid extinction. Mammals did not become a dominant species on Earth until the extinction of dinosaurs.
Assuming this is for AP Environmental Science.
There’s the nitrogen cycle that circulates nitrogen around the globe. However, human activities can affect it and add nitrogen into the atmosphere such as deforestation. Plants use nitrogen in order to thrive. If humans cut it down, the nitrogen inside it will come out. Natural forces such as light night can also create nitrogen.
