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Wartime Farm: ChristmasSunday, 29th March 2015 08:00 - YesterdayIt's Christmas, and our living historians are back in the war, and back on the land, for a very special Wartime Farm. Read more: OU on the BBC: Wartime Farm - Christmas Special
Timewatch: StonehengeSunday, 29th March 2015 22:05 - BBC Four
Thinking Allowed: Global clothing and poverty, fur inheritance in PolandMonday, 30th March 2015 00:15 - BBC Radio 4
A History of Ideas - How do I live a good life?Monday, 30th March 2015 12:04 - BBC Radio 4
The Bottom Line - Corporate scandalAvailable until Saturday, 26th March 2016 14:15How do companies recover from negative press? Evan Davis hears from guests who have broken away from scandal on this... Read more: The Bottom Line - Corporate scandal
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Early years team work and leadershipThis unit explores aspects of teamwork and leadership for early years practitioners. Try: Early years team work and leadership now
Succeed with maths – Part 1[BETA] If you feel that maths is a mystery that you want to unravel then this short 8-week course... Try: Succeed with maths – Part 1 now
Managing eutrophication is a key element in maintaining the earth's biodiversity....
Managing eutrophication is a key element in maintaining the earth's biodiversity. Eutrophication is a process mostly associated with human activity whereby ecosystems accumulate minerals. This unit explains how this process occurs, what its effects on different types of habitat are, and how it might be managed.
By the end of this unit you should be able to:
- Describe the principal differences between a eutrophic and an oligotrophic ecosystem.
- Explain the mechanisms by which species diversity is reduced as a result of eutrophication. (Questions 2.1 and 2.2)
- Contrast the anthropogenic sources that supply nitrogen and phosphorus to the wider environment, and describe how these sources can be controlled. (Question 3.1)
- Describe how living organisms can be used as monitors of the trophic status of ecosystems. (Question 4.1)
- Compare the advantages and disadvantages of three different methods for combating anthropogenic eutrophication. (Question 4.2)
- Current section: Introduction
- Learning outcomes
- 1 Introduction
- 2 Effects of eutrophication
- 3 Causes and mechanisms of eutrophication
- 4 Managing eutrophication
- 4.1 Measuring and monitoring eutrophication
- 4.2 Reducing eutrophication
- 4.3 Reducing the nutrient source
- 4.3 Reducing the nutrient source, continued
- 4.4 Reducing nutrient availability
- 5 Summary
Eutrophication describes the biological effects of an increase in the concentration of nutrients. The collective term ‘nutrients’ refers to those elements that are essential for primary production by plants or other photosynthetic organisms. Eutrophication is most often caused by increases in the availability of nitrogen and phosphorus, commonly present in soil and water in the form of nitrate and phosphate, respectively. However, altered concentrations of any plant nutrient may have a recognizable biological effect. Eutrophication can occur in any aquatic system (freshwater or marine), and the term is also used to describe the process whereby terrestrial vegetation is affected by nutrient-enriched soil water.
This study unit is an adapted extract relevant to The Open University course S206 Environmental science which is no longer taught by the University. If you want to study formally with us, you may wish to explore other courses we offer in this.
This is an extract from an Open University course which is no longer available to new students. If you found this interesting you could explore more free Environmental Science course units or view the range of currently available OU Environmental Science courses.