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Author Topic:   Evolution and Increased Diversity
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 31 of 140 (438622)
12-05-2007 2:19 PM
Reply to: Message 27 by NosyNed
12-05-2007 1:10 PM


Re: The Law of Macro Diversity
NN writes:
I don't know what you mean when you say "genes can be attributed to modifying habitats ...".
Yes, that's a loose statement. It takes the extremely selfish-gene position. Would it be more reasonable to say that phenotypes of some organisms are capable of modifying habitates? I'm thinking of plaque production by oral bacteria, or of beaver dams.
I must not understand this. It is so obvious that it seems odd to say it. Diversity obviously stems from genetic variation. Mutation (and other) generates diversity at the genetic level. Whether such diversity makes it into surviving phenotypes is dependent on the environment.
OK. Maybe a "punctuated" increase of three families of marine life per million years since the Permian Extinction is of no particular importance to the concept of increasing diversity. Or maybe it is. It must seem more special and important to me than it does to you.
”HM

This message is a reply to:
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Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 32 of 140 (438624)
12-05-2007 2:26 PM
Reply to: Message 30 by RAZD
12-05-2007 1:47 PM


Re: A law of macro-diversity?
RADZ writes:
To me ad hoc means arbitrarily developed to deal with something after it has occurred.
RAZD, I knew you didn't mean to imply purpose. Since the term ad hoc applies mostly to human affairs I have avoided using it in an ecological or evolutionary context. Didn't want to appear teleological, you know.
”HM

This message is a reply to:
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New Cat's Eye
Inactive Member


Message 33 of 140 (438626)
12-05-2007 2:34 PM
Reply to: Message 26 by Fosdick
12-05-2007 12:27 PM


Re: Macroscopic increase of biodiversity
But isn't evolution itself associated with changes in the environment?
Not always. Sexual selection and genetic drift are not associated with changes in the environment.
Evolution can lead to a decrease in biodiversity.
Do you disagree with that statement?
Yes, of course it can.
That's pretty much the whole point. Evolution does not always lead to an increase in diversity.
But how then would you account for the macroscopic increase in biodiversity, per Sepkoski's graph?
It due to envionmental factors.
If you say it may be a peculiar to Earth but not necessarily the case elsewhere, then I say show me some of that "elsewhere" data.
Nah, I don't think its peculiar to Earth.

This message is a reply to:
 Message 26 by Fosdick, posted 12-05-2007 12:27 PM Fosdick has replied

Replies to this message:
 Message 34 by Fosdick, posted 12-05-2007 2:46 PM New Cat's Eye has replied

  
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 34 of 140 (438631)
12-05-2007 2:46 PM
Reply to: Message 33 by New Cat's Eye
12-05-2007 2:34 PM


Re: Macroscopic increase of biodiversity
CS writes:
Not always. Sexual selection and genetic drift are not associated with changes in the environment.
Genetic drift is usually caused by environmental factors that reduce population size. No? Sexual selection could be the result of climate change or predation. No?
Nah, I don't think its [life] peculiar to Earth.
Any particular reason why other than speculative faith?
”HM

This message is a reply to:
 Message 33 by New Cat's Eye, posted 12-05-2007 2:34 PM New Cat's Eye has replied

Replies to this message:
 Message 35 by New Cat's Eye, posted 12-05-2007 3:19 PM Fosdick has replied

  
New Cat's Eye
Inactive Member


Message 35 of 140 (438634)
12-05-2007 3:19 PM
Reply to: Message 34 by Fosdick
12-05-2007 2:46 PM


Re: Macroscopic increase of biodiversity
Genetic drift is usually caused by environmental factors that reduce population size. No? Sexual selection could be the result of climate change or predation. No?
It doesn't matter if it can, the point is that it is not that it must. Which you've already agreed to in saying that evolution can lead to a decrease in biodiversity.
Evolution does not necessarily lead to an increase in diversity. Case closed.
Nah, I don't think its [life] peculiar to Earth.
Any particular reason why other than speculative faith?
By "it" I was not referring to "life". I was referring to "the macroscopic increase in biodiversity".
And the reason is that I have no reason to think otherwise.

This message is a reply to:
 Message 34 by Fosdick, posted 12-05-2007 2:46 PM Fosdick has replied

Replies to this message:
 Message 36 by Fosdick, posted 12-05-2007 3:44 PM New Cat's Eye has replied

  
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 36 of 140 (438637)
12-05-2007 3:44 PM
Reply to: Message 35 by New Cat's Eye
12-05-2007 3:19 PM


Re: Macroscopic increase of biodiversity
CS writes:
Evolution does not necessarily lead to an increase in diversity. Case closed.
Catholic, take another look at Sepkoski's graph in Message 14? Yes, on a relatively short-term basis evolution can lead to decreasing diversity, which is shown in Sepkosky's graph, but on a long-term basis it clearly has increased. What data do you have to show that would contradict this?
”HM

This message is a reply to:
 Message 35 by New Cat's Eye, posted 12-05-2007 3:19 PM New Cat's Eye has replied

Replies to this message:
 Message 37 by New Cat's Eye, posted 12-05-2007 3:58 PM Fosdick has replied

  
New Cat's Eye
Inactive Member


Message 37 of 140 (438641)
12-05-2007 3:58 PM
Reply to: Message 36 by Fosdick
12-05-2007 3:44 PM


Re: Macroscopic increase of biodiversity
Yes, on a relatively short-term basis evolution can lead to decreasing diversity, which is shown in Sepkosky's graph, but on a long-term basis it clearly has increased. What data do you have to show that would contradict this?
None. I don't deny that diversity has increased.
What I deny is that the process in the Theory of Evolution must lead to an increase in diversity.
I'm not saying that it hasn't or that it won't, I'm just saying that it is not true that it must.

Also,
Your argument is of the fallacy Post Hoc ergo propter hoc, which literally mean "After this therefore because of this". We have an evolutionary process and we have an increase in diversity. You're saying that because the increase in diversity comes after the evolutionary process then it is because of the evolutionary process. It is just a correlation and that does not necessarily imply causation (wait, this is all sounding familiar, kinda like my first message in this thread).
here: http://www.fallacyfiles.org/posthocf.html
quote:
Exposition:
The Post Hoc Fallacy is committed whenever one reasons to a causal conclusion based solely on the supposed cause preceding its "effect". Of course, it is a necessary condition of causation that the cause precede the effect, but it is not a sufficient condition. Thus, post hoc evidence may suggest the hypothesis of a causal relationship, which then requires further testing, but it is never sufficient evidence on its own.

Science fails to recognize the single most potent element of human existence.
Letting the reigns go to the unfolding is faith, faith, faith, faith.
Science has failed our world.
Science has failed our Mother Earth.
-System of a Down, "Science"
He who makes a beast out of himself, gets rid of the pain of being a man.
-Avenged Sevenfold, "Bat Country"

This message is a reply to:
 Message 36 by Fosdick, posted 12-05-2007 3:44 PM Fosdick has replied

Replies to this message:
 Message 38 by Fosdick, posted 12-05-2007 4:15 PM New Cat's Eye has replied

  
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 38 of 140 (438646)
12-05-2007 4:15 PM
Reply to: Message 37 by New Cat's Eye
12-05-2007 3:58 PM


Re: Macroscopic increase of biodiversity
Catholic, would the theory of the expanding universe qualify as Post Hoc ergo propter hoc because it is a fallacy "...committed whenever one reasons to a causal conclusion based solely on the supposed cause preceding its "effect""?
”HM

This message is a reply to:
 Message 37 by New Cat's Eye, posted 12-05-2007 3:58 PM New Cat's Eye has replied

Replies to this message:
 Message 39 by New Cat's Eye, posted 12-05-2007 4:24 PM Fosdick has replied

  
New Cat's Eye
Inactive Member


Message 39 of 140 (438647)
12-05-2007 4:24 PM
Reply to: Message 38 by Fosdick
12-05-2007 4:15 PM


Re: Macroscopic increase of biodiversity
Catholic, would the theory of the expanding universe qualify as Post Hoc ergo propter hoc because it is a fallacy "...committed whenever one reasons to a causal conclusion based solely on the supposed cause preceding its "effect""?
It doesn't really matter and is not on topic.
But I would say that it is not that fallacy becuase it is not based solely on the supposed cause preceding its effect. There are other indictations that the universe is expanding.
But let's not get into that here.

This message is a reply to:
 Message 38 by Fosdick, posted 12-05-2007 4:15 PM Fosdick has replied

Replies to this message:
 Message 40 by Fosdick, posted 12-05-2007 4:45 PM New Cat's Eye has replied

  
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 40 of 140 (438657)
12-05-2007 4:45 PM
Reply to: Message 39 by New Cat's Eye
12-05-2007 4:24 PM


Re: Macroscopic increase of biodiversity
CS writes:
It doesn't really matter and is not on topic.
But you brought it up, and now you're taking the OT dodge instead of defending it. Aren't there some Latin words that describe that maneuver? Maybe: Post ego fumo nonblowum procto?
”HM

This message is a reply to:
 Message 39 by New Cat's Eye, posted 12-05-2007 4:24 PM New Cat's Eye has replied

Replies to this message:
 Message 41 by New Cat's Eye, posted 12-05-2007 5:28 PM Fosdick has replied

  
New Cat's Eye
Inactive Member


Message 41 of 140 (438667)
12-05-2007 5:28 PM
Reply to: Message 40 by Fosdick
12-05-2007 4:45 PM


Re: Macroscopic increase of biodiversity
CS writes:
It doesn't really matter and is not on topic.
But you brought it up
I didn't bring up the expanding universe, you did. What doesn't matter is if the expanding univers theory is a fallacy or not, which is what I was referring too by "it".
and now you're taking the OT dodge instead of defending it.
Defending what?
That the expanding universe is not a fallacy? I most certainly did defend it right here when I said:
quote:
But I would say that it is not that fallacy becuase it is not based solely on the supposed cause preceding its effect. There are other indictations that the universe is expanding.
So what the hell are you talking about?
Your comprehension skills are lacking...

This message is a reply to:
 Message 40 by Fosdick, posted 12-05-2007 4:45 PM Fosdick has replied

Replies to this message:
 Message 42 by Fosdick, posted 12-05-2007 7:24 PM New Cat's Eye has replied

  
Fosdick 
Suspended Member (Idle past 5521 days)
Posts: 1793
From: Upper Slobovia
Joined: 12-11-2006


Message 42 of 140 (438695)
12-05-2007 7:24 PM
Reply to: Message 41 by New Cat's Eye
12-05-2007 5:28 PM


Re: Macroscopic increase of biodiversity
CS writes:
So what the hell are you talking about?
I was talking about evidence, hard evidence, that biodiversity increases over macroscopic timeframes. And I produced the evidence. That part of evolution is not included in the ToE, and I took the position that it should be. No need to start in with the insults. Just show me some evidence that biodiversy on Earth did not increase over macro timeframes.
”HM

This message is a reply to:
 Message 41 by New Cat's Eye, posted 12-05-2007 5:28 PM New Cat's Eye has replied

Replies to this message:
 Message 43 by Granny Magda, posted 12-05-2007 10:47 PM Fosdick has not replied
 Message 45 by RAZD, posted 12-06-2007 7:35 AM Fosdick has replied
 Message 48 by MartinV, posted 12-06-2007 9:32 AM Fosdick has replied
 Message 50 by New Cat's Eye, posted 12-06-2007 10:17 AM Fosdick has replied

  
Granny Magda
Member
Posts: 2462
From: UK
Joined: 11-12-2007
Member Rating: 3.8


Message 43 of 140 (438719)
12-05-2007 10:47 PM
Reply to: Message 42 by Fosdick
12-05-2007 7:24 PM


Re: Macroscopic increase of biodiversity
HM,
Just show me some evidence that biodiversy on Earth did not increase over macro timeframes.
Why would you want that? No-one is claiming that biodiversity hasn't increased, least of all Catholic Scientist, who has clearly stated that he did not dispute an increase. I think the point being made is that evolution doesn't exclusively increase diversity.

Mutate and Survive

This message is a reply to:
 Message 42 by Fosdick, posted 12-05-2007 7:24 PM Fosdick has not replied

  
LucyTheApe
Inactive Member


Message 44 of 140 (438727)
12-06-2007 12:26 AM
Reply to: Message 17 by RAZD
12-04-2007 6:05 PM


Re: two step, one step
It is a likely event over the long term because of the way random events work,
What is a random event?

This message is a reply to:
 Message 17 by RAZD, posted 12-04-2007 6:05 PM RAZD has replied

Replies to this message:
 Message 46 by RAZD, posted 12-06-2007 7:39 AM LucyTheApe has not replied

  
RAZD
Member (Idle past 1426 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 45 of 140 (438769)
12-06-2007 7:35 AM
Reply to: Message 42 by Fosdick
12-05-2007 7:24 PM


Re: Macroscopic increase of biodiversity
... hard evidence, that biodiversity increases over macroscopic timeframes.
And it occurred after evolution. Thus the post hoc ergo propter hoc fallacy.
The question is whether evolution causes it or if it is a result of some other cause and effect.
It has not occurred on Mars, where life would also involve evolution.
Therefore there is some other cause and effect going on.
Enjoy.
Edited by RAZD, : sp

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This message is a reply to:
 Message 42 by Fosdick, posted 12-05-2007 7:24 PM Fosdick has replied

Replies to this message:
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