Essay, Research Paper: Marine Biology 


Free Biology research papers were donated by our members/visitors and are presented free of charge for informational use only. The essay or term paper you are seeing on this page was not produced by our company and should not be considered a sample of our research/writing service. We are neither affiliated with the author of this essay nor responsible for its content. If you need high quality, fresh and competent research / writing done on the subject of Biology, use the professional writing service offered by our company.

A major source of coastal pollutants, human sewage fouls bays and beaches with
both toxic and nontoxic pollutants. Although billions of dollars have been
invested in sewage treatment plants to treat wastewater, new and growing coastal
communities have increased the amount of discharge into oceans and estuaries.
The United States Office of Technology Assessment has identified thirteen
hundred major industries and six hundred municipal wastewater treatment plants
that discharge into coastal waters of the United States. Many toxic substances
enter the sea through the sewer systems, but others originate as industrial
discharges. For many toxic substances, we do not yet know how to determine their
extent or fate in the marine environment or to evaluate their effects on marine
life. Some of the better-known trace metals and toxic chemicals include mercury,
copper, lead, and chlorinated hydrocarbons. Chlorinated hydrocarbons, synthetic
chlorine-containing compounds, are created for use as pesticides or are
by-products of the manufacture of plastics. Oil is a very dangerous thing when
it comes to oil spills into the ocean. These catastrophic oil spills engender a
concern for the marine environment as no invisible containment can. Spilled oil
floats on seawater and provides a constant reminder of its presence until it is
washed ashore, sinks, or evaporates. Large volumes of oil suffocate benthic
organisms by clogging their gills and filtering structures or fouling their
digestive tracts. Marine birds and mammals suffer heavily as their feathers or
fur become oil soaked and matter, and they lose insulation and buoyancy. Until
recently, marine debris was considered to be of minor importance when compared
to other pollutants. Problems caused by marine debris, however may rival or
exceed those resulting from some better known pollutants, including oil. By
definition, marine debris is any manufactured object discarded in the marine
environment. When dumped, it may sink to the sea floor, remain suspended at
mid-depths, or float at the surface and eventually be carried ashore by winds
and waves. Plastics constitute as great an environmental threat as all the other
kinds of debris, combined. Although plastics may break up into smaller pieces,
they degrade much more slowly than most other kinds of debris, and most plastics
float. Concentrations of plastics tend to be highest in the Northern Hemisphere,
where vessel traffic is the heaviest, where most plastics manufacturers and
fabricators are located, and where more intensive recreational use is made of
beaches and coastal waters. Hopefully, as we approach the twenty-first century,
we can learn to leave some old and wasteful habits behind. It will not be easy
or simple, but each one of us must develop a sense of stewardship toward the
world ocean and its resources that is reflected in our personal as well as our
political decisions.
Good or bad? How would you rate this essay?
Help other users to find the good and worthy free term papers and trash the bad ones.
Like this term paper? Vote & Promote so that others can find it

Get a Custom Paper on Biology:

Free papers will not meet the guidelines of your specific project. If you need a custom essay on Biology: , we can write you a high quality authentic essay. While free essays can be traced by Turnitin (plagiarism detection program), our custom written papers will pass any plagiarism test, guaranteed. Our writing service will save you time and grade.

Related essays:

Biology / Membrane 
The membrane has a double lipid layer through which fat- soluble substances will move, by passive transport or diffusion. The molecules will only move through if they are small enough. There are globu...
In southern California, adult California newts (Taricha torosa)have been found to frequently cannibalize both larvae and egg masses. In turn, for those adult newts that remain in the stream pools afte...
Considered one of the most significant, influential, and controversial publications in history, this book, I felt would be interesting to read and learn from. Although his content in this particular b...
Imagine going to the doctor for a simple check up. Sure you've had some minor problems- indigestion, lack of energy, weight loss, and a bit of gas- but that's not out of the ordinary....or is it? In...
Biology / Photosynthesis
Photosynthesis is the process by which chlorophyll - containing organisms - such as green plants, algae, and some bacteria - capture energy from light and convert it to chemical energy. For the proces...