Quote:
Originally Posted by Claudius Galenus
Well, neither is a question really but what the hell. Both of your statements are correct for the most part. We did already know which morphs would appear in which areas, but the point of the experiment was the adaptation between predator and prey, and the results from studying adapted generations with unadapted ones.
My point is that the morphological adaptations do not appear to differentiate the species (as the article sez in its opening salvo before delving into the experiment). It appears that the genetic information necessary for the bacteria to adapt to the boundry conditions of the test sample is actually a defining characteristic of the species.
BTW - I did a litle cross-research on pseudomonas fluorescens and it appears that the hetrogeneous setup (unpretrubed) gives rise to the three main morphologies, but if the hetrogeneous sample is subsequently preturbed and becomes homogeneous, then only the SM morphology persists. I take that as verification that the morphological adaptation is not a permanent one and that the article erroneously refers to the varying morphologies as different species throughout the text.
Refer to slides 3 and 4 of the following .ppt file:
http://classshares.student.usp.ac.fj...0evolution.ppt
In order to go in-depth on this, I think we're going to need the actual experiment as reported by the scientists and not the science news report. My best guess is that in the 18 predator innoculated samples were in a continuous state of perturbation, execpt for the period of transfer. Apparently, 6 transfer rates were utilized (presumably across 3 samples/rate).
This is where the article gets particularly fuzzy for me: since the predators and prey were subjected to a homogeneous environment, how could the predators adapt to the WS and FS morphologies? They should not have been present in the homogeneous environment.
My best guess is that the transferred samples were injected into a hetrogeneous environment, allowing for the study of the predator-prey relationship across morphologies briefly before freezing the sample. To me, this is a very important point to understand and I can't make it out from the article (I also don't want to pay some of the sites I found to download the actual text).
I'm not convinced that we can draw the conclusion that evolution has occurred in this instance. However, this type of framework is much much better IMO than the 'fit the narrative to match the fossil record' approach to the topic.