Notes
- We are putting stress on the planet with farming and cities
- A scientist was able to create a mathematical equation that is able to predict change before it happens
- scientist have discovered that there more weak bonds in the food web than strong bonds
- we have done alot of unknown harms like fishing and adding invasive species to environments
- Food webs were made do find out why some populations were higher than others and why they changed drastically over a year
- scientist discovered that when wolf population decrease elk population increase rapidly
- Recovering a animal is hard because you will need to change the whole food web
- scientist thought that the recovery of cod would take 5-6 years but they were wrong
- fish called the forage fish ate the eggs of cod fish making the number of birth get lower
- food webs change not only by hunting and fishing but by other forces
- climate change is also altering food webs
- preventing a food web from changing might be more effective than restoring one
Summary
What humans are doing is causing the food web to flip. Instead of the highest level to stay the same since they have no predators they are decreasing causing the lower levels to increase rapidly. A group of ecologist made experiments in Peter Lake in Washington the experiment was to add bass to the lake. By adding bass to the lake small fish increased in population because a lot of their predators were gone. This showed that the food web flipped. Scientist have been studying, trying to figure out what caused some species to have more than other species. Food webs was the answer to their questions. In order to recover an animals some factor had to be done to other species so they can quickly come back. This is why some scientist say that preventing any changes in a food web is more effect than trying to restore and focus on one specie.
Opinion
I think that the experiment that they did as a good idea because it helped them create a monitor that tells them when an ecosystem is being pushed to it's limit. A food web is a very complex system that can have negative effects if it is changed in any way. Since hunting and fishing are some the big forces that have an impact on the change in these food webs, I think more should be done to prevent any of this from happening.
Opinion
I think that the experiment that they did as a good idea because it helped them create a monitor that tells them when an ecosystem is being pushed to it's limit. A food web is a very complex system that can have negative effects if it is changed in any way. Since hunting and fishing are some the big forces that have an impact on the change in these food webs, I think more should be done to prevent any of this from happening.