Every organisms died, none live forever…there are no exceptions to that natural law…whether it by old age, disease, killed (either by other organisms or by accident), and so on.
The fitness that you are referring to as “survival”, is misunderstanding Evolution. As I said every organisms died, without exception…the fitness is not about being strong, fast, intelligent, etc, but it is really more about reproducing and maintaining the population…those with traits that more suited to changed environment, will more likely reproduce successfully and past the traits to succeeding generations.
What you have repeatedly mistaken, is thinking the “survival” is about the individual organism, but really evolution is about the survival of the population for succeeding generations.
While it is true, that different organisms will have different lifespans, some live and will die sooner than others, while others will live longer.
For instances, some families and species can live for centuries…some even thousands of years. Take for instance the Great Basin bristlecone pine (species Pinus longaeva), grown in western US states, Utah, Nevada & California. One of them, nicknamed Methuselah has been dated 4855 years old.
This species (Pinus longaeva) is those of individual trees, non-clonal, trees that each have a single root.
There are some groups of vegetation, including trees, of which they covered acres of land, but actually all shared a single root, and they can be great deal older than Methuselah.
What clonal tree means, a clonal colony is a single root can grow dozens, hundreds or thousands of trees, each one is genetically identical to each other, eg identical DNA, because they are all clones, that grow from one root. Each trees may lived a couple of thousands of years, and then died, but the root itself many times older than a non-clonal tree like methuselah. New trees can sprouted from the root.
I found out about these clonal plants when I was looking at the oldest living trees, when I was googling for the oldest trees, and found about clonal colonies. I had never heard of them before
An example of clonal tree. I would suggest that you look up Pando (nickname), which is a grove of quaking aspen colony, where one root has more 47,000 trees or stems (all clones), in one of the national forests in Utah, that grow around 106 acres of land.
Not only is this organism one of the oldest on Earth, it is also a contender for other extreme titles.
www.treehugger.com
If you think blue whale is the largest animal in the world, which is true, these clonal trees are the largest living organism, Period!