http://www.dive.in/articles/a-scuba-divers-impact-on-a-coral-reef/ - from the Dive In. magazine - very user friendly however that means that it isn't as detailed or scientific as the journals, yet it provides some good info as to how divers potentially damage the marine environment. On the other hand, the article educates divers on how to minimise the amount of damage done to coral reefs and therefore could arguably reinforce the idea that divers do protect marine life.
http://www.jstor.org/discover/10.2307/4314577? - really useful case study about the negative impact of divers on Marine Protected Areas (possibility to look into MPAs as a separate point in my essay). Very detailed as the article includes specific data concerning the amount of coral breakages per dive and therefore the ability to analyse the results. Similar problems to other articles as there is a cost for the full PDF :( however it has probably enough info in the abstract to use in my essay.
http://www.sciencedirect.com/science/article/pii/S0006320701000854 - abstract for potential case study comparing various sites around the Cayman Islands with differing amounts of visitors. Shows the impact of overcrowding on corals - may not necessarily be based on individual divers themselves but the amount of divers and therefore the strain on the reefs. Identifies a need for solutions to protect the ecological and aesthetic qualities of the coral.
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