From ScienceDaily, Evolution Of New Species Slows Down As Number Of Competitors Increases, (and note the irony),
The rate at which new species are formed in a group of closely related animals decreases as the total number of different species in that group goes up, according to new research.
The research team believes these findings suggest that new species appear less and less as the number of species in a region approaches the maximum number that it can support.
Wow. Just like one would expect to find in a complex system, optimally designed to work at an efficient level.
In order for new species to thrive, they need to evolve to occupy their own niche in the ecosystem, relying on certain foods and habitats for survival that are sufficiently different from those of other closely related species.
Competition between closely related species for food and habitat becomes more intense the more species there are, and researchers believe this could be the reason for the drop-off in the appearance of new species over time.
So, in order for new species to thrive, they need to evolve. Yet, doesn't the survival of an ecosystem depend on the complex interactions within its members? Since when does an ecosystem have time to spare to allow new species the opportunity to occupy their niche? And if they have time to spare, how much time do they have?
"Okay, guys? You've got 1 million years to get up to speed or else - it's curtains!"
You see, when evolution is the only game in town, then the only reasonable conclusion is to state that evolution speeds up when there are less species walking around, and slows down when there are more. And, since we're dealing with natural selection, environmental constraints, genetic mutations, and such, it's gotta boil down to the competition factor, right?
Yet, consider that nowhere do we see the actual evidence that evolution is the mechanism which accomplishes speciation, much less the means with which the mechanism speeds up and slows down. It's nothing more than imposing an idea on the data. So, when we see, after major extinction events, a quick recovery of new species, it must be due to a quickened evolutionary pace brought about by a rich, open environment (i.e., as caused by the major extinction event).
However, the exquisitely timed placement of the necessary species, so as to provide a complex ecosystem the proper functioning components, also points to the actions of guidance. Unless the evolutionists can demonstrate the physical qualities which mandate that evolution speed up during times of open environments, their claims are simply wishful thinking.