I will assume you mean oil as in crude from oil drilling rigs, or from spills from oil tankers that are damaged, and spill thousands of gallons of crude into the water.
Back in the time of the GREEKS, they used to pour oil on the water to stop waves. This works. ( you can also set it on fire to burn wooden boats ). Oil floats on the surface for a long time, stopping all the waves normal motion. This affects ocean currents, and affects evaporation, and weather patterns, and how hot the water gets, and where the currents flow.
This has huge effects on all the creatures and plants in the water, that are used to typical temperatures and weather patterns.
The oil eventually dissolves in tiny amounts and enters the ocean water ( the ocean has EVERY single element dissolved in it, including millions of tons of gold and silver ). The oil, eventually will enter the gills of the fish and mammals in water, and will cling to the plants' surfaces, and spread itself on the ocean floor. The gills of fish are very sensitive, and crude, black oil, is not part of their daily intake - each starfish, or, crab. or whale, or coral, or whatever, will react a different way to the buildup of the oil, some will immediately get very sick, while some would be almost immune, in small quantities. There are some lifeforms on the ocean floor that breath sulfur or ferrous ions, instead of oxygen, and these creatures would obviously react differently than the typical oxygen based lifeforms. No one has done a complete study of ALL the lifeforms in the ocean, and how they react to large spills of oil, but the immediate area of the spill, particularly on the coastlines, where the water is shallow, is well documented. The thick, black goo can cover everything, and kill everything - blocking out light, poisoning the water beds, killing typical seaweeds ( covering them with goo ), etc. and changing the lifeforms in the area for years. Many years after an oil spill, the heavy oil compounds are found LAYERED under new deposited silts, so that there would be a permanent tar layer on the sea floor for thousands of years.
Crude contains ALL the petrochemical compounds - at a refinery, they crack or boil off all the different things, starting with the lightest compounds. First there are very light, liquid things like gases - these used to be just burned in huge flaming exhaust towers, as waste. Now they are saved as " natural gas" in pipelines for home heating, etc. Then comes heavier things like gasoline, then diesel fuel, then pitches, or tars used for paving highways, etc. When crude is spilled into the shorelines, all these chemicals are present, and will eventually separate on their own, putting gasoline molecules, and diesel molecules, and jet fuel molecules into the water. You probably do NOT have to guess what would happen to fish and plants if you poured gasoline into the water - the oil spill does this, it just takes longer to separate. Luckily, the sun boils off many of the light gasolines and gases, and the waves churn up and dissolve many particles, and many particles COMBINE with other compounds in the water to become "other" compounds, some less toxic, some even more deadly. The millions of gallons of the ocean disperses these chemical compounds over the entire earth. What the results of this, are, is a guess!
A LOT more research needs to be done to totally assess the true extent of the damage. Typical results, using MILLIONS of dollars of money funded by fines generated in court battles, can be seen on the EXXON VALDEZ oil spill. Many results are not finished yet, and it will be years before even the basics are determined.
EXXON VALDEZ
http://www.evostc.state.ak.us/
fish
http://www.evostc.state.ak.us/Habitat/fish.htm
plants
http://www.evostc.state.ak.us/Habitat/nearshore.htm
There are many more studies on the web, and many more disasters to look at. You can try typing in oil spill disaster in
a search engine such as dogpile.com, and you will get many results.
2006-11-29 12:30:17
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answer #4
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answered by cowgurl_bareback 2
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