Rolling the dice with evolution: Massive extinction will have unpredictable consequences
(PhysOrg.com) -- New research by Macquarie University palaeobiologist, Dr John Alroy, predicts major changes to the rules of evolution as we understand them now. Those changes will have serious consequences for future biodiversity because no one can predict which groups will come to dominate after the current mass extinction.
Alroy said today's extinction is due to a range of human behaviours and activities coupled with the effects of climate change. His findings were published this week in the international journal Science.
Alroy, who works in the Department of Biological Sciences at the University, undertook his study while at University of California, Santa Barbara using the massive Paleobiology Database, which compiles data from nearly 100,000 fossil collections worldwide. He tracked the fate of major groups of marine animals throughout the fossil record and during the Earth's most massive extinction event, which occurred 250 million years ago.
He concludes that the rules governing diversity of these major groups we have assumed to be invariant have actually changed through geological time. Thus, a group's average rate of diversification or branching into new species in the past is not a good predictor of how well it will fare after a mass extinction event.
Alroy's findings indicate that as a result of a range of factors, the major extinction event currently underway will be much more severe than has been seen in most other major periods of mass extinction. Alroy notes there have been only three mass extinctions on the level of the current one in the last half billion years.
Organisms that might have adapted in the past may not be able to this time, he said.
"You may end up with a dramatically altered sea floor because of changes in the dominance of major groups. That is, the extinction occurring now will overturn the balance of the marine groups."
When there is a major mass extinction, it's not just a temporary drop in richness of species, he said.
Alroy likens what is happening now to rolling the dice with evolution.
"What's worrisome is that some groups permanently become dominant that otherwise wouldn't have. So by causing this extinction, we are taking a big gamble on what kind of species will be around in the future. We don't know how it will turn out. People don't realise that there will be very unpredictable consequences."
Provided by Macquarie University
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Sep 03, 2010
Rank: 2.2 / 5 (10)
Follow the Boy Scout motto: Be prepared.
Species that have learned to adapt survive. We have no shortages of rats, coyotes or roaches among thousands of other species that have adapted to present conditions.
Embrace change.
Sep 03, 2010
Rank: 1.5 / 5 (8)
so many of their ideas are disproved by the very reality aroudn them, given the mass extinctions and outcomes over hundreds of millions of years.
that if we reduced the species to 30 or so, in 300 million years we would never realize it started with those 30.
sigh
Sep 03, 2010
Rank: 1.6 / 5 (14)
Evolutionists claim ALL species share one common ancestor.
What's the worry?
Sep 03, 2010
Rank: 4.4 / 5 (13)
Sickening.
Sep 03, 2010
Rank: 1.4 / 5 (10)
Instead of rationally addressing comments you must accuse those you disagree with of mental illness. And you say you are not a socialist? That was a common tactic in communist states.
Sep 03, 2010
Rank: 4.6 / 5 (9)
Sep 03, 2010
Rank: 4.1 / 5 (7)
Sep 03, 2010
Rank: 5 / 5 (8)
...Which probably explains why it hasn't made the 11 o'clock news, as you put it. A meteor impact or a volcanic eruption--something big, flashy, explosive--makes great news. A gradual decay of almost all of Earth's ecosystems? Sadly, that's not really "news;" it's simply too big to be easily covered.
Sep 03, 2010
Rank: 1.3 / 5 (12)
Sep 03, 2010
Rank: 5 / 5 (9)
Sep 03, 2010
Rank: 5 / 5 (7)
It has, several times. You're telling me that you've never heard that we're facing the sixth great extinction event?
Sep 03, 2010
Rank: 1.8 / 5 (13)
Sep 03, 2010
Rank: 1.7 / 5 (11)
Sep 03, 2010
Rank: 2.5 / 5 (11)
If chocolate didn't exist, why not invent it?
Sep 03, 2010
Rank: 2.4 / 5 (9)
The Holocene extinction event bagan before human influence was a notable factor. What this guy says makes sense except for the doomsday part. Basically what he's saying is that we don't have a clue what's going to happen. Totally random results, like rolling a dice, right? So, equal chance of it being extremely good or bad, and some kind of bell curve distribution of likely outcomes in the middle somewhere. That's what rolling dice gives you. Come on, would it be okay if mosquitos went extinct? Can't we just get rid of the ones we don't like and keep all the cute little otters?
Skeptic is trolling again, don't answer him. Anyone who calls another poster names in stead of having a good response doesn't deserve an answer. That's abuse, and contrary to site posting rules. That's sickening.
Sep 03, 2010
Rank: 5 / 5 (7)
That isn't true. Life may have started and died out many times before it actually took hold. The truth isn't known.
Sep 03, 2010
Rank: 1 / 5 (2)
Sep 03, 2010
Rank: 1.3 / 5 (6)
Sep 03, 2010
Rank: 5 / 5 (6)
...Not suggesting that the current mass extinction will get anywhere close to wiping out all life on Earth, because nothing short of a collision between Earth and another world or a Venus-scale change in climate could do that.
That said, the mass die-off of thousands of species isn't something to take lightly, either. I mean...what's wrong with murder? There are 6.7 billion other people out there, no great loss. Life'll go on. No one'll care in a hundred years. Those last three sentences are all factually true, but that doesn't mean that they're right.
Sep 03, 2010
Rank: 2.3 / 5 (8)
Nature rewards success and punishes failure. Some humans have a problem with this, but unfortunately we don't get to set the ground rules. We do have the power to influence, but we can't change the fundamentals. I do believe that the only thing that will stop this extinction is either a massive advance of technology or massive restraint/curbs put on current technology.
As an aside: It's only human beings that put values and labels on things like mass extinctions as being "good" or "bad". Objectively however, they just "are".
Sep 03, 2010
Rank: 1.4 / 5 (9)
Sep 03, 2010
Rank: 4.5 / 5 (4)
ModernMystic: I find myself agreeing with everything you said in your most recent post. I don't say I like it, or necessarily draw the same conclusions from it, but I do agree.
Sep 03, 2010
Rank: 5 / 5 (5)
Here are my references:
http://www.abc.ne...6740.htm
One of many, what've you got?
Sep 03, 2010
Rank: 3.6 / 5 (5)
Or to terminal Sarcoma, Ebola, Typhus, TB, Mosqitos, the Lions in the Lion's den...In order to enjoy the fruits of success, it helps to still be around. Mass extinction tends to have a cascading effect, usually because some catastrophic event puts unbearable strain on the food chain...in this case, mainly an insupportably large, rapacious human population.
For the rest, we are in agreement.
Sep 03, 2010
Rank: 3.4 / 5 (5)
mongo,
A fault in your epistemology. Didn't your god give you free will, to go along with your RandObjectivist, freimarket, GodBangery?
Has the pure light of reason at last irradiated the mangyhole?
Sep 03, 2010
Rank: 1 / 5 (8)
Why worry if all species are going to die off? It can't be the fault of humans who have no free will.
Sep 03, 2010
Rank: 4 / 5 (2)
There is no reason to think we won't do something, or haven't already done something to the biosphere which will wipe it out, and us along with it.
So, like I said earlier I believe there are only two ways forward. One way is really to go backward, to abandon much of our technology and wind the clock significantly backwards. There are a host of reasons I don't think that this is likely, most of which are self evident to everyone here.
The other way is to push forward faster...especially in the field of nanotechnology, and energy production. Specifically fission/fusion for the latter. The problem with the former (nanotechnology) is that while it holds the promise to cure all our environmental problems, it also holds the potential to reduce the entire planet to grey goo. I'm not sure "we" as a collective civilization are ready for that awesome power.
We're out of time though...catch 22. I say damn the torps. full speed ahead.
Sep 03, 2010
Rank: 3 / 5 (1)
Drexler has given us ways in which we might avoid the unthinkable with nanotech., all we have to do is listen. If we do, we have a very very bright future indeed.
Sep 03, 2010
Rank: 4.8 / 5 (4)
Ignorance does not create fact. Yes we are in a huge extinction event. It is still early days and started about 50,000 years ago.
In another 50,000 years it may well be over - for all of us. I know - as individuals we may live up to 100 years and as Marjon says drink, smoke and pollute till your hearts content for tomorrow may never come.
On the realistic side this story is about the fact that extinction on many species will have unknown consequences on the survivors. Will the rats and cats mutate and take over all the jobs of the other small creatures - of course they will - if they do not become extinct too.
Will any creatures larger than an earth worm survive the next 50,000 years - I hope so. It is a shame to see the last of the mega fauna may not even survive the next 100 years.
Sep 03, 2010
Rank: 5 / 5 (3)
Sep 03, 2010
Rank: 3.8 / 5 (4)
Sep 03, 2010
Rank: 3 / 5 (2)
Two biggest issues -make that three: Gotta find non-polluting, cheap(if not essentially free), unlimited or nearly so energy supply(ies).
Gotta find a way to reclaim, permanently sequester, and/or reuse massive amounts of toxins let loose in the biosphere, and replace them in our materials manufacturing. Maybe nanotech will make that job possible.
Lastly, gotta stabilise, and then reverse population growth, and find a way to provide everyone with a decent minimum living standard. all three have to be accomplished globally, or we die trying...
Oh, and I'm not interested in forfieting my life
-or anyone else's, for that matter- so that some purported "Elite" aka the powerful and wealthy, are allowed to hibernate(or ride herd, as it were) for some stretch of time while the rest of us expire in this bucket of filth that their overweening greed and arrogance has stewed up for us all.
Sep 03, 2010
Rank: 4 / 5 (4)
Generally speaking, the fewer the inhabited ecological niches, the less robust the ecosystem, and therefore more susceptible to partial or complete disruption or collapse.
Given the complex, interdependent nature of the biosphere, I'd say that we can't afford to lose any more than we already have, with the possible exception of some numbers of insects and microbes- but, even then, they all serve a purpose, which is to compete, adapt, survive - and put the pressure on all others to do the same.
Sep 03, 2010
Rank: 1 / 5 (5)
Surely the government will provide.
You missed my point. Some assert man has no free will and all is deterministic. If true, then how can man exercise any free will to change the world? Some of these same people believe man can and must do what ever must be done to save the world.
Sep 03, 2010
Rank: 1 / 5 (5)
"Glass frog and snail-sucking snake discovered in Ecuador" http://www.guardi...scovered
"Since 1979, scientists have discovered around 300 species of life living around the hydrothermal vents. "
http://www.7wonde...nts.aspx
Sep 03, 2010
Rank: 4.2 / 5 (5)
That is beside the point. These are species already in existence- they didn't just appear overnight, and are just a very few of the estimated millions that are known to exist, but are yet to be described.
What we are concerned with here is the "natural" rate of extinction, versus those extinctions that are driven by human activity.
Read on:
http://news.monga...ucn.html
http://www.guardi...s-evolve
Still think it's a low-level risk?
Sep 04, 2010
Rank: 5 / 5 (1)
Sep 04, 2010
Rank: 5 / 5 (1)
Sep 04, 2010
Rank: 2 / 5 (1)
Sep 04, 2010
Rank: 5 / 5 (3)
That issue is moot or purely philosophical at best. Whether or not we have free will can never be proved. As such, the fact that we feel as we have free will should be enough to act accordingly (ie, responsibly).
Sep 04, 2010
Rank: 5 / 5 (2)
Well, if you're going to take the long view, the planet's surface will become a scorched hell-hole in a billion years or so (some say longer), but still unlivable for life. So, ultimately, all life on this planet is doomed unless we can jump ship and take some survivors with us (or their genetic blueprints). But I think we should focus on the here and now. Unchecked human population growth is our biggest threat.
Sep 04, 2010
Rank: 2 / 5 (1)
finches beaks changed in a whole lot less than a million, and that was just a few islands.
every one of those invasive species will end up changing very fast (but to us slow).
Sep 04, 2010
Rank: 1.8 / 5 (5)
"People don't realise that there will be very unpredictable consequences."
Sep 04, 2010
Rank: 2.8 / 5 (4)
Sep 04, 2010
Rank: 5 / 5 (2)
yeh and not will endangered but are endangered, the next time i wont do 5 things simultaneously, at the end nothing is well done!
Sep 04, 2010
Rank: 3.5 / 5 (2)
For human civilization or civilization descended from human beings? Once we get our house in order as far as energy and we have mature nanotechnology the lifespan of our civilization will be on the order of the lifespan of the universe...probably 10^100 years.
Life on Earth only has about 500 million years left no matter how you cut it unless we start to move the orbit of the Earth outward because the sun is getting brighter and hotter. Best estimates put it at about half a billion years for the biosphere.
Sep 04, 2010
Rank: 5 / 5 (2)
That said, there's a big difference between a near or total annihilation of Earth's life in a million years and the same event in a billion. Just because it's inevitable doesn't mean that it shouldn't be postponed.
Sep 04, 2010
Rank: 5 / 5 (1)
Sep 04, 2010
Rank: 5 / 5 (3)
You don't watch the new much or read the science forums at all to be able to say that. This extinction event has been given a ton of media coverage. I have been aware of it personally for at least 30 years.
Sep 04, 2010
Rank: 4 / 5 (1)
If one bonehead makes a big mistake it won't wipe the rest of us out. A lot of people don't understand what mature nanotechnology REALLY means. It's almost Godlike power...essentially if the laws of physics don't prevent it...we can do it. That also means that we're going to be able to change ourselves.
That's a scary proposition, but also a hopeful one. We may finally be able to shuck this reptile brain mentality we've had for 150,000 years of human existence and for 5,000 odd years of human civilization.
Moreover we will have no poverty as we know it now, many of the reasons for warfare will disappear rapidly, ALL of our ecological problems will be solved almost LITERALLY overnight. We will no longer need the Earth to sustain us so we'll no longer need to strain it.
Sep 04, 2010
Rank: not rated yet
http://e-drexler....nts.html
It's going to transform civilization FAR more than agriculture and the industrial revolution combined.
Sep 04, 2010
Rank: 4 / 5 (1)
I agree Ronan, we need to put off extinguishing species posthaste (I suggest making a DNA database of the most threatened ones so we can "resurrect" them when we have the means), but not at the expense of attaining a high level of technology rapidly. Once we have these technologies the "competition" between us and "nature" will be over...completely over.
Then we can even "save" the biosphere in 500 million years when the sun would have extinguished it. We can make an artificial sun, or move and shift the orbit of the Earth. We can become TRUE stewards of nature for those that have an interest to do so.
We can actually spread life as we know it throughout not just this Galaxy, but indeed the Universe if that's what's tickling our fancy as a type II or III civilization.
Our descendants have a potentially extremely exciting, fulfilling, and wondrous future if we can just keep it together for another 100-200 years...if.
Sep 04, 2010
Rank: 1 / 5 (4)
If governments will stay out of the way:
"When policymakers proposed the NNI, politicians expressed enthusiasm that it would make the United States more economically competitive. Forecasts, not from intemperate prognosticators but sober-minded science managers, predicted that the international market for nano-goods would be $1 trillion by 2015. The production of these goods, supporters said, would require a new high-tech (and highly paid) workforce of some two million people, potentially leading to a major restructuring of the global workforce."
"The NNI was never just about “technology.” It was also a form of industrial policy, forming part of a hidden developmental state in which federal investment helps underwrite new commercial technologies. "
http://www.scienc...ss.org/2
Sep 05, 2010
Rank: 4 / 5 (4)
The more you say we need to fix our sun or move animals to other planets the more you sound like aliens from another planet/demension. The truth is someday we will do these things if we can ever get past being animals that fight and destroy each other.
Sep 09, 2010
Rank: 5 / 5 (1)
Many of us on our own islands think that we are animals while other feel that we are special and have privileges.
Those of us that feel that we are animals can then relate to our brothers and sisters of different species. Rather than feel that we are "our brothers keeper" some of us feel that from a position of more power we should act responsibly.
We have a choice for the future vision:
a) Continue doing what we always did
b) Change our way of living closer to the other animals
c) Change our way to have more control and do things better.
Sep 10, 2010
Rank: 2 / 5 (2)
a) Continue doing what we always did
b) Change our way of living closer to the other animals
c) Change our way to have more control and do things better."
d) Become more agressive, wipe out wasteful species, and take control of our planet away from mother nature.
What we'll really do is e) All of the above. Some of us will do one thing and others will do something else. Coordinating everyone to think the same way isn't going to happen. Even just the few people here on this site can't ever agree for more than a couple minutes.
Sep 10, 2010
Rank: 2 / 5 (1)
Sep 10, 2010
Rank: 2.5 / 5 (2)
You're rather ignorant. The relative level of education is what allows people to understand concepts and form individual opinions. You've continually shown that your knowledge of science is lacking, especially within the realms of biology and ecology. This is probably why you continually parrot the opinions of other maligned individuals.
Sep 10, 2010
Rank: 1.5 / 5 (2)
If you really think that you're going to get people to change their nature, then I hardly think I'm the one being ignorant here, but you're entitled to your opinion of me I guess. I'll bet you actually get mad when people don't see things your way, don't you?
Sep 10, 2010
Rank: 1.5 / 5 (2)
Sep 10, 2010
Rank: 3 / 5 (2)
Let's try this the academic way, exemplify your point. Tell us exactly how we'll master our world when we barely understand it.
The issue here is you have a rather large hole in your experience of the world. It leads me to assuming that you've grown up in a suburban setting, probably in America for your entire life. You have not a hint of how hard it can really get.
Sep 16, 2010
Rank: 1.5 / 5 (2)
You continually confuse knowledge with opinion, and you think anyone who doesn't share yours has ill intent. Oh well.
"Let's try this the academic way, exemplify your point. Tell us exactly how we'll master our world when we barely understand it."
Take a deep breath, and read what I said above. I said that I don't think we'll do much of anything different than what we are doing right now. I don't think we can master it. To believe that we can is dilusional. Do you really think you'll get china or mexico to play along with environmental treaties, ever? As to a lack of experience, if you think altruistic forces will ever prevail over economic forces, then you are the more unworldly of the two of us. I was born in a house with no running water, BTW. The kitchen had a hand pump the bathroom was in the back yard, and hot water came from the wood stove. shoes? what shoes?
Sep 16, 2010
Rank: 1 / 5 (3)
The communist record on the environment speaks for itself.
The first best defense to 'save the planet' is to create economy prosperity everywhere as quickly as possible. But the only proven way to accomplish this is with free markets and limited governemnt. A conundrum for the environmental socialists.
Sep 16, 2010
Rank: 5 / 5 (1)
You seem to not understand what deterministism is.
Deterministism states that your decisions are based on information you've collected from previous experiences. In a specific situation, given your previous experiences and knowledge, you will make the same decision every time. Further, this means everyone's decisions are similarly going to be the same every time.
Everything physical (ie. not within our brains) is only affeted by physics. Since our decisions are "determined" so is what happens to anything physical that we interact with. Anything that happens to anything physical that we don't interact with was also "determined" based on the initial conditions of the universe (since it's all just physical interactions).
Given our universe's starting conditions, there was only ever one possible outcome according to deterministics.
Sep 16, 2010
Rank: 5 / 5 (1)
Sep 16, 2010
Rank: 1 / 5 (3)
Aral sea, Chernobyl, Three Gorges dam, smog from China that can be measured in the USA.....
"The socialist world suffers from the worst pollution on earth."
"According to the Worldwatch Institute, more than 90 percent of the trees in the pine forests in China’s Sichuan province have died because of air pollution. I"
"Government-owned power plants are another example of public-sector pollution. "
http://www.thefre...llution/
Sep 16, 2010
Rank: 2 / 5 (1)
That may or may not be true, but I don't care either way. My only intent here is entertainment because I enjoy debate. I would hardly call that a devious plan. Are you under the impression that anything useful is gained by the discussion threads on this site? I think it serves little pupose other than fun.
So you disagree with me, that the human race will continue as it has been? If you forsee some drastic change in human nature in our future, please share. That's not to say that I think people are good the way we are. I'm just saying that any huge cultural shift is unlikely, don't you think?
Sep 16, 2010
Rank: 1.5 / 5 (2)
Sep 16, 2010
Rank: 1 / 5 (4)
What it is really about is property rights and responsibilities.
If no one owns the property, it will be exploited by all.
When locals were able to own the profits from elephant tourism, the elephants were better protected. Current laws prevent them from trading in ivory which would encourage further conservation on their part. Tragedy of the commons is well documented and government control of the 'commons' has not been all that great either. Forest fires on US govt land is one example.
Conservation groups purchase land to preserve it.
Sep 17, 2010
Rank: 3 / 5 (1)
Sep 21, 2010
Rank: 5 / 5 (1)
Sep 21, 2010
Rank: 1 / 5 (4)
Who says?
The reason most are in poverty is due to tyrannical governments.
Sep 22, 2010
Rank: 5 / 5 (1)
FYI Marjon, the Worldwatch institute retracted that statement shortly after they made it, because they were wrong.
Sep 22, 2010
Rank: 1 / 5 (1)