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Volcanic activity on the island of Hawaii results in a cyclical pattern of habitat destruction and fragmentation by lava, followed by habitat regeneration on newly formed substrates. While this pattern has been hypothesized to promote the diversification of Hawaiian lineages, there have been few attempts to link geological processes to measurable changes in population structure. We investigated the genetic structure of three species of Hawaiian spiders in forests fragmented by a 150-year-old lava flow on Mauna Loa Volcano, island of Hawaii: Tetragnatha quasimodo (forest and lava flow generalist), T. anuenue and T. brevignatha (forest specialists). To estimate fragmentation effects on population subdivision in each species, we examined variation in mitochondrial and nuclear genomes (DNA sequences and allozymes, respectively). Population subdivision was higher for forest specialists than for the generalist in fragments separated by lava. Patterns of mtDNA sequence evolution also revealed that forest specialists have undergone rapid expansion, while the generalist has experienced more gradual population growth. Results confirm that patterns of neutral genetic variation reflect patterns of volcanic activity in some Tetragnatha species. Our study further suggests that population subdivision and expansion can occur across small spatial and temporal scales, which may facilitate the rapid spread of new character states, leading to speciation as hypothesized by H. L. Carson 30 years ago
The researchers arrived at their conclusion after superimposing digitized world maps of seismically and volcanically active regions onto a map depicting biologically rich regions of the world. They found that tectonically active regions with the greatest upheaval from earthquakes and volcanoes were also regions that had the highest known levels of biodiversity.
Well, for one, there has never been a global flood, and there most certainly was not one 4,400 years ago. Such a notion is absolutely, comically ridiculous. I would recommend putting down the religious books and picking up a textbook for awhile.
Also, there is no time constraints on evolution.
originally posted by: BELIEVERpriest
a reply to: Cypress
Furthermore there are geological indicators all over the world to point to a global cataclysm.
originally posted by: BELIEVERpriest
a reply to: AdmireTheDistance
If that makes me sound uneducated, then I'm happy to accept that label. At least I can still think out side of the box.
originally posted by: BELIEVERpriest
a reply to: AdmireTheDistance
Well, for one, there has never been a global flood, and there most certainly was not one 4,400 years ago. Such a notion is absolutely, comically ridiculous. I would recommend putting down the religious books and picking up a textbook for awhile.
And just exactly how do you know this for sure? Its attitudes like this that continue to drive a wedge between the spiritual world and what a pannel of men deem scientifically sound.
originally posted by: BELIEVERpriest
a reply to: Cypress
Also, there is no time constraints on evolution.
That isnt what they teach us in school these days, but that is my point; it doesnt take thousands of years for adaptation and biodiversity.
And again, how do you know that there was no flood. Multiple ancient civilizations had flood myths, maybe they were trying to tell us something.
We already know that there is more fresh water inside the earth than there is water in the oceans. Both the bible and the Babylonian myths told is this. Furthermore there are geological indicators all over the world to point to a global cataclysm.
And again, how do you know that there was no flood.
Although it is not the deepest Antarctic core (the 3,263-meter [10,705-foot] Vostok core holds this record), its compressed ice does provide the longest polar climate record, going back 800,000 years.
originally posted by: BELIEVERpriest
a reply to: AdmireTheDistance
Well, there is the cambrian explosion,
the polystrate (upright) fossils found all over the world,
the discovery of underwater shorelines as deep as 400 ft
the fact that the continents look as though they have literally been ripped apart
, the fact that radio-active dating has proven to yield inconsistent results,
and, oh yeah, there is more than enough water under the crust to cover the entire surface of the earth (that was a recent find that apparently the ancient world already knew about).
Now, I know what mainstream science has to say about these phenomena, Im just saying that those THEORIES have not and cannot be sufficiently proven.
As far as geology and biology goes, my education is high school level. Im not uneducated, I just think that the high school science curriculum is more often than not, full of crap when it comes to evolution and the age of human civilization.
originally posted by: BELIEVERpriest
Now, I realize that this does not constitute as proof of anything, and my mind is made up regarding Darwinian evolution, macro-evolution, and micro-evolution...but, why does volcanic activity always seem to be associated with undiscovered biodiversity?
If evolution does indeed take thousands of years to manifest, then why are 50 year old islands sporting new species of plants and animals?
originally posted by: Asynchrony
That's very interesting. I suppose that the energies near a volcano vary much more greatly as well (certainly in temperature). Also, I suppose that the mineral content in fresh volcanic rock is much more diverse than in the top soil of say, an ancient forest wrenched of nutrients over the centuries. That may also contribute to the diversity.