ENVIRONMENTS THROUGH TIME
We all live in environments that are comfortable. Fish live in water
because their body only works in that habitat. The chemistry of the
water makes a perfect place for fish to thrive. In a healthy environment
the fish will live, produce young, and die. In the present day
environments, we can see that if you change the chemistry or water
availability, you can have a drastic effect on organisms. Even in the
ocean, a change of temperature of just 2-5 degrees centigrade can wipe
out certain species, but also make conditions better for other species.
If you remove one species, it can cause a chain reaction through the
food chain and cause the entire environment to change.
In the fossil record we can witness mass death and chart when a
species becomes extinct. We can see if the events were at a local level
or a larger regional area. These events help us interpret how the
environment evolved through time.