• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Water Pollution

Extracts from this document...

Introduction

Water Pollution Activities carried out by the human population to supply food, power, and industrial needs have a considerable effect on the environment. These effects include atmospheric and water pollution, and destroying habitats. Water pollution is mainly caused by "run off", containing fertilisers, enters rivers from fields. It is known as leaching when the fertilisers get washed into the river or lake. Similarly, sewage also pollutes rivers. The polluting effects of fertilisers and sewage are caused by the constituent ions such as nitrates and phosphates. They result in eutrophication. Nitrates and phosphates enter the river and are absorbed by algae and other autotrophies. This causes them to grow rapidly at a much faster rate than usual. ...read more.

Middle

Although, organisms that are not so sensitive will increase due to a lack of competition and the lack of predators. An example of this is bloodworms. They process proteins similar to hemoglobin which helps them to take in enough oxygen for survival, even at low concentration. Without fish to eat them the numbers of bloodworm grow even more. Eutrophication won't just affect animals in the river and ponds. Primary consumers could be affected by the decrease in primary producers and could cause numbers in that food chain to decrease due to a lack of energy being passed on to the next tropic level. Some algal blooms are toxic to plants and animals. Toxic compounds they produce can make their way up the food chain, resulting in animal mortality. Freshwater algal blooms can pose a threat to livestock. ...read more.

Conclusion

The low pH results in many mineral ions being less soluble and consequently less avalable to plants. Phophates ions become bound to clay particles and are unavailable to plants while other possitivlty charged ions such as calcium are more easily leached. Aluminium ions are an exception and may accumulate to a toxic level. This can cause plants to be defoliated and die. This has a sequential effect on all consumers which rely directly or indirectly on the plants in the food web. In lakes, the low pH destroys because the pH cause the fish to create too much mucas over their gills and this prevents gaseos exchage of oxygen. Levels of other minerals are normaly low and cannot sustain much plant growth. A lake is said to be oligotrophic in this condition. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Energy, Respiration & the Environment section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Energy, Respiration & the Environment essays

  1. Marked by a teacher

    Effect of nitrate concentration on the growth of Duckweeds

    5 star(s)

    The net uptake of water occurs by osmosis. Osmosis is the passive transport of water across a semi permeable membrane. Because a plant cell has a wall, this affects Osmosis which occurs between the cell and its extra cellular fluid.

  2. Investigate the effect of bile salt concentration on the digestion of milk by the ...

    Secondly, and more importantly, it reduces the human error involved in recording the results to a very small error which is involved to start the program. However, this can be overcome by placing a trigger which automatically starts recording when there is a small change in the pH.

  1. Field trip report Mangrove ecosystem

    Moreover, the habitat at a higher attitude ensure that it can be explored to air for sufficient oxygen to gaseous exchange. However, it cannot be survived at a higher zone without water as it will died of desiccation and unavailable of the mobility of antheridium.

  2. the effect of bile concentration on the activity of the enzyme lipase during the ...

    Put the pH probe in the buffer of 7 and then set it as 7 and then test with the pH buffer of 4 and repeat if it is not accurate. It is important that the pH probe is accurate as this affects our results directly if it's inaccurate.

  1. Energy absorbed by a bouncing ball.

    more readings in each of the high and low initial height regions. One thing that I may have improved was how I released the ball from the initial height because it is not very accurate by dropping it by hand.

  2. Moscow, Russian Federation Summer-time pollution and summer smog problems

    (Roshydromet 2010) 3. Moscow State University (MSU) Observatory in association with the Russian Academy of Sciences, which conducted its research approximately for the last decade (Elansky et al 2007; Lokoshenko and Elansky 2006). Despite such a variety of sampling stations and data obtained by all three organizations, some parameters are

  1. the Effect of Copper Ions on a

    induce the changes in shape to make the enzyme behave like a catalyst. The method suggests that when the enzyme's active site comes into contact with the right substrate, the active site slightly changes or moulds itself around the substrate for an effective fit.

  2. Investigation into how Lichen growth is affected as you move further away from a ...

    That is why I have chosen three sites which would have similar environmental factors e.g. pollution and human traffic to see if my findings are conclusive. Sources for Research and Rational: 1. Ahmadjian V. (1993). The Lichen Symbiosis. New York: John Wiley & Sons. ISBN 0-471-57885-1. 2. Brodo, I.M., S.D.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work