# Acknowledgements

Course image: Nic Redhead in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

The content acknowledged below is Proprietary (see terms and conditions). This content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Grateful acknowledgement is made to the following sources for permission to reproduce material in this unit:

Figures 1.1, 1.2, 1.3, 1.10, 2.4, 2.8, 2.10, 2.11, 2.11, 2.17, 3.2, 3.3, 4.2, 4.3 & 4.7 Courtesy of the Environment Agency;

Figures 1.4, 1.8a, b, 2.3, 2.12, 2.14, 2.15, 2.16, 3.1, 4.8 Copyright © Mike Dodd/The Open University;

Figure 1.7 Andy Harmer/Science Photo Library;

Figure 1.8c Courtesy of Dr John Madsen/Minnesota State University;

Figure 1.12 Copyright Dr Julian Thompson, Wetland Research Unit, Department of Geography, University College, London;

Figure 2.1 Copyright © Sukurta Viliaus & Co.;

Figures 2.2, 2.5a & 3.4 Copyright © Owen Mountford/Centre for Ecology and Hydrology;

Figure 2.5b Copyright © Peter Gathercole/Oxford Scientific Films;

Figure 2.6 Copyright © Alistair MacEwen/Oxford Scientific Films;

Figure 2.7 Copyright © BBC Worldwide;

Figure 2.18 With permission from Professor Chris Kjeldsen, Biology Department, Sonoma State University;

Figure 2.24 Graham Day;

Figure 4.4 Copyright © Peter Leeds-Harrison/Cranfield University;

Figure 4.5 Copyright © ARM Limited. Reproduced with permission of ARM Limited, Rydal House, Colton Road, Rugeley, Staffordshire, WS15 3HF, UK, armreedbeds.co.uk, designers of reed beds and welands for wastewater treatment;

Figure 4.6 Pisces Conservation Limited.

Courtesy of the Environment Agency;

Don’t miss out:

If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University - www.open.edu/openlearn/free-courses

OpenLearn - Eutrophication
Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.