Originally posted by galveston75
Also a comment of the hundreds of thousands of different kinds that "just evolved".
In reality, how many different kinds of enviroments are there on this planet?
According to the first site I found, it's about 18. Lots of gray areas inbetween but still those are the basics.
http://www.windows2universe.org/earth/ecosystems.html
So if most needed to survive to begin with, he would have moved on or died.
Just a thought.........
In reality, how many different kinds of enviroments are there on this planet?
Millions if not trillions. There may be “18” main types but, of course, there are subtypes within each of those types and subtypes within those subtypes and so on.
For example, in a tropical rainforest environment, there is tree-top environment where certain epiphyte plants ( http://en.wikipedia.org/wiki/Epiphyte “ epiphyte is a plant that grows upon another plant “ ) can grow which cannot grow on the floor of the forest which is a very different sub-environment.
So if most animal life lived in those basic ecosystems, lets say birds, why so many varities?
are you implicitly making the assumption here that only one species of each main type of living thing ( such as “birds” ) can evolve in each ONE environment (even a sub-environment ) ? i.e. the mathematical relationship here must
necessarily be one-to-one?
If so, this assumption is false -what barrier would you imagine that would block the evolution of many species of, say, birds evolving in an identical environment (even a sub-environment ) ?
In the Kagu rainforest there is 2,500 species or more just in that one area. Why?
because they can evolve there and they did because here was no barrier blocking the evolution of many species in the same main type of environment ( and this is ignoring the issue that a main category of an environment such as the rainforest environment has many subtypes such as tree-top environments and ground environments and subtypes of those subtypes etc thus you can see it NOT merely as just one environment but many ) and evolution is an inevitable process under the right conditions so the conditions must have made it inevitable that many evolved.
If one bird was in that area to begin with and found food, water and shelter, why did he evolve into soooooo many varities? If he survived and was able to live there and reproduce, why change?
one answer would be that there are many sub-environments within that environment for evolution to optimise the design ( non-standard meaning of the word “design” here ) of the birds to each of those sub-environments.
But another reason is because there are different possible optimised survival strategies even in exactly the same environment; for example, the same environment may contain both insect food and seed food but each one of those food types requires a different optimised beak-shape and food-gathering instinct.
If there wasn't food, water and shelter in an amount needed to survive to begin with, he would have moved on or died.
yes. What if there WAS food, water and shelter in an amount needed to survive but ONLY to those with the right mutation? -now you will have the right conditions for evolutionary change.