Sunday, April 19, 2009

Evolution and Extinction

I do not believe that we are experiencing a mass extinction. I believe that in the process of life, organisms live and die. Although it appears there are a lot of organisms going extinct, I do not believe we have to worry. For the other animals have gone extinct and new animals have been given life. It is a process that I do not worry about depleting all together. For some reason, when I think of mass exctinction, I think of the world becoming bare and dry, which I do not believe is the case. What are your thoughts? Please feel free to disagree.
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4 comments:

  1. lwink2meApril 20, 2009 at 1:00 PM

    I agree with you Becky. I don't think it is that bad yet. Don't you think we'd know if animals were dropping like flies? It isn't an excuse to look the other direction though. This has opened my eyes a little to what is going on around me.

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  2. BreanneApril 21, 2009 at 12:05 PM

    I definitely see where you are coming from. Life and death is a process that everything goes through. Perhaps the planet is just going through its natural cycle and we should let it run its course.

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  3. kas323April 21, 2009 at 1:54 PM

    Life and death is definitely a cycle. If we were going through a mass extinction, I think it would be all over the place! It would for sure be all over the news!!

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  4. Mrs. Plog DuarteApril 24, 2009 at 3:41 PM

    I do agree with you, that life cycles exist. New species are forming all the time as old ones become extinct. As far as if we are in a mass extinction, it is hard for me to tell. I think that it is interesting when you look at the website from our evolution OMP, the extinctions on the time scale come from a lot of the same causes: Global cooling/warming, oxygen depletion, changes in the sea level, meteor or volcanic activity. Currently we are experiencing global warming and sea level changes. According to the U.S. Geological Survey, the temperature has risen a degree in the past 100 years, and the sea levels are rising about 1-2 millimeters per year. I know it sounds small, but if we continue on this track it could mean that in places like Iceland where about 11 percent of the island is covered by glaciers could experience a glacier decrease by 40 percent by 2100 and virtually disappear by 2200 (USGS.gov). What and how many species would not make it though these increases? Would new species form to take their place? It is hard for me to say.

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