Why The Beaver Should Thank The Wolf By Mary Hannibal

these crimes of cannibalism as a way to to satisfy their needs for survival; however,

Since the reintroduction of wolves into Yellowstone they have created an astounding and advantageous trophic cascade. A trophic cascade is an ecological phenomenon triggered by the addition or removal of top predators and involving reciprocal changes in the relative populations of predator and prey through a food chain. These often result in dramatic changes in ecosystem structure and nutrient cycling. In a three-level food chain, an increase (or decrease) in carnivores causes a decrease (or increase) in herbivores and an increase (or decrease) in primary producers such as plants and phytoplankton according to briticanna (how to make better). The entire ecosystem was able to become whole again because the wolves, a key species, were reintroduced. Now this may seem weird, a predator comes into the area a begins to kill animals, how can this be beneficial in any way? Well the fact of the matter is that it is extremely beneficial. The reason being the problem in Yellowstone was the overpopulation of the elk. These elk had no predators, they were free to roam and reproduce, and they did this very well. Now elk are also a

However, there does exist some benefits through reducing the excessive increase of one native creature from a lack of native predators in their natural environment helping out other animals with a diminished population to multiply out of the point of

elk killed by wolves also provides vital food source for predators such as grizzlies and black bears and for scavengers such as coyotes and ravens.

If a predator organism was removed from an ecosystem, it would allow the prey population to increase which could lead to not having enough food for these organisms to eat. For example, if wolves were eliminated from the taiga biome than there would be a dramatic increase in the population of moose. This would result in the moose not having enough jack pine and could lead to starvation. The wolves would then have to eat more rabbits, elk, and voles which would decrease their population and starve the organisms that rely on these animals.

Many people tend to be afraid of wolves because of how big they are and their strength. However, we don’t see how important they are until there are drastic changes. For almost 70 years Yellowstone did not have a night where a wolves howl could be heard. In that time the deer population grew fast; because of the increase in their

 Organisms in nature rely on one another for their well being.  However, sometimes those organisms become greedy and decide to take in the relationship, instead of sharing with their symbiotic partner.  Through this action, it takes on parasitic characteristics.  In Toni Morrison's work, Sula, Sula Peace and Nel Wright demonstrate how a symbiotic relationship goes awry.  When one partner betrays the other, by taking instead of giving, the other partner suffers.  Nel and Sula's relationship suffers because Sula unfortunately takes actions that lead to partaking in a parasitic relationship where she begins to wither away.  Nel refuses the parasitic lifestyle and

Reintroduction of wolves brought about recovery of plants and animals in Yellowstone National Park. In 1990s, deer were overpopulated due to absence of its predator, wolves. Regardless of people’s efforts, the number of deer kept increasing. As a result,

Both the passage and the lecture discuss the decline of some sea otters’ population in Alaska coast. On the one hand, the passage argues that this decline is due to environmental pollution. On the other hand, the lecture opposes by stating that predation is most likely the reason for the phenomena.

In order for an ecosystem to stay an ecosystem there are three aspects that interact with each other:

The speaker cast doubts on the idea that pollution is the my cause for otter popullation decline. According to the Speaker, instead of pollutions but over hunting of whales could be the main cause for the otters incidence decline would predatation. Therefore the speaker asserts that decrease in the otter population could be linked to new a new predator in its habitat: orcas in search for new preys to replace the shrinking population of their natural preys, the whales.

As species evolved over time they become adapted to the environment in which they live in. Some species become supreme at one trait that was passed down to them by their ancestor. This trait assists them to survivor in the environment in which they live in. When hunting for a meal, sometimes it could be difficult for a predator to catch a prey. For an instant, in a coyote-badger relationship, a coyote eats other species such as prairie dogs and ground squirrels, the coyote can locate the prairie dog as well as run fast to catch them, however, the prairie dogs could easily escape away in one of their numerous tunnels. The badger also eats prairie dogs and ground squirrels, but it can dig way much faster than the coyote to catch

The exact scenario changes in each example, but the central idea remains that through a chain of interactions, a non-abundant species has an outsized impact on ecosystem functions.

The carnivorous predators are then also influenced because they eat the herbivores, and so

Moreover, the professor indicates that the ecosystems may also caused other mammal animals decline. But the other mammal, like whales, didn't decrease. As a result, the ecosystem should not cause the sea cow need to face the food shortage. However, the author