Login

Join for Free!
118841 members


Diversity; End product of evolution?

Discussion of everything related to the Theory of Evolution.

Moderator: BioTeam

Diversity; End product of evolution?

Postby Tyran » Sat Aug 13, 2005 2:30 am

In a recent biology scholarship paper i was asked an interesting question. It first started by ratling off about 3 fish that evolved from a common ancestor; the 'boney fish' (Seahorse, Anglerfish and Flatfish i think) after 2 pages of this the question finally came up:
Discuss, with reference, this statement; Diversity is the end product of evolution.
I gave the answer they wanted but started thinking that evoluton really doesnt have an endpoint does it? Would a more correct statement be: Diversity results from evolution? any thoughts?
User avatar
Tyran
Garter
Garter
 
Posts: 27
Joined: Fri Aug 05, 2005 9:24 am
Location: New Zealand

End Point

Postby ananth » Sat Aug 13, 2005 2:55 pm

Tyran ,
U are absolutely right. Diverity is there result of evolutuion, but certainly not the end point. I am pretty sure there have been cases where there was a loss of diversity in populations due to evolution. And Evolution is a pertty dyanamic process , in the sense its taking place all the time and uptil "Life" is existing evolution has to go on ..........
Ananth
ananth
Garter
Garter
 
Posts: 2
Joined: Sat Aug 13, 2005 2:48 pm

Postby mith » Sat Aug 13, 2005 4:23 pm

It depends on how you look at it. In terms of overall number of branching that happens, of course evolution produces much diversity. But if you look at it as how many different species are surviving at one moment, then the answer isn't so clear.
For example, a climax community will have less diversity than a middle(somewhere between primary and climax) community.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN


Postby Dr.Stein » Sat Aug 13, 2005 4:28 pm

Evolution is never end..
Image
User avatar
Dr.Stein
King Cobra
King Cobra
 
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia

Postby MrMistery » Sat Aug 13, 2005 6:32 pm

Of course evolution has no end. Any average intelligent person can tell you that. And of course diversity is the result of evolution. The main reason why diversity does not mean the end of evolution is that the environment is in continous change. There are also(although very few) cases of converging evolution where evolution rezults in less diversity, but let's stick to the general case.
A case where diversity is the end of evolution is the animals that live in super stable conditions. An example is a crosopterigian called Lattimeria sp. that lives in the super stable conditions of salinity, pressure, temperature of the deep sea. For now that fish has stopped evolving since the environment is stable, not changing. But who knows what the future holds?
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby Dr.Stein » Sun Aug 14, 2005 7:17 am

MrMistery wrote:Of course evolution has no end. Any average intelligent person can tell you that...
Ok, ok, grrr :evil: :lol:
Image
User avatar
Dr.Stein
King Cobra
King Cobra
 
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia

Postby charles brough » Mon Aug 15, 2005 5:46 pm

Well, biological evolution might end. It could end here on Earth if we are hit by a large comet. . . That would rather well end social evolution also!
But of course, we can never prove Dr. Stein wrong because to do so, we would have to be here and incinerated.

:lol:
User avatar
charles brough
Coral
Coral
 
Posts: 155
Joined: Mon Jun 06, 2005 3:22 pm
Location: California

Postby mith » Mon Aug 15, 2005 6:44 pm

We could all die from a hunger strike :D. But that's not likely to happen because while a single organism might chose to die, the specie as a whole cannot do so.
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby MrMistery » Mon Aug 15, 2005 9:10 pm

Why not? If every single organism in the species dies of hungerstrike at the same moment.... :lol: :roll:
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby Thisisanfield » Sun Oct 30, 2005 9:56 am

charles brough wrote:Well, biological evolution might end. It could end here on Earth if we are hit by a large comet. . . That would rather well end social evolution also!
But of course, we can never prove Dr. Stein wrong because to do so, we would have to be here and incinerated.

:lol:


Evolution is a never ending process unless the environment ie, the world we live in disappears which would leave no environment for any species to live on or to evolve from. I think environment is the biggest mechanism for evolution of any species and diversity is just a result of the constant change of the environment organisms are forced to go under to survive and leave offsprings behind.

to maybe correct it, just maybe..
'Diversity is a product of evolution.'
'No 42 species can co-exist in the same ecological niche for there are too many.'
-Lamarky's 42nd theory of dryology.
User avatar
Thisisanfield
Garter
Garter
 
Posts: 4
Joined: Sun Oct 30, 2005 8:37 am
Location: Warm inside a pouch of a kangaroo named Skippy.

Postby dmvprof » Tue Nov 22, 2005 8:37 pm

I think the whole premis to this question is flawed, and reflects a misunderstanding of evolution. Diversity itself is not a requirement of evolution. Diversity is how evolution responds to the environment.
The less diverse the environment, the less diverse the life will be.
dmvprof
Garter
Garter
 
Posts: 10
Joined: Mon Nov 21, 2005 6:36 pm


Return to Evolution

Who is online

Users browsing this forum: No registered users and 3 guests