Editing Great Barrier Reef (section)

====Loss of coastal wetland====
The runoff problem is exacerbated by the loss of coastal [[wetland]]s which act as a natural filter for toxins and help deposit sediment.<ref name=wetlands>{{cite web |author=Great Barrier Reef Marine Park Authority |title=Wetlands |url=http://www.gbrmpa.gov.au/corp_site/key_issues/water_quality/wetlands |access-date=13 March 2007 |url-status=dead |archive-url=https://web.archive.org/web/20061002034022/http://www.gbrmpa.gov.au/corp_site/key_issues/water_quality/wetlands |archive-date=2 October 2006 }}</ref><ref name="Brodie07">{{cite web |year=2007 |author=Brodie, J. |url=https://research.jcu.edu.au/tropwater/resources/06%2007%20Nutrient%20mgmt%20zones%20in%20the%20GBR%20catchment.pdf |title=Nutrient management zones in the Great Barrier Reef Catchment: A decision system for zone selection |publisher=Australian Centre for Tropical Freshwater Research |access-date=14 March 2009 |url-status=dead |archive-url=https://web.archive.org/web/20170325202543/https://research.jcu.edu.au/tropwater/resources/06%2007%20Nutrient%20mgmt%20zones%20in%20the%20GBR%20catchment.pdf |archive-date=25 March 2017 }}</ref><ref>{{cite web |author=Australian Government Productivity Commission |year=2003 |title=Industries, Land Use and Water Quality in the Great Barrier Reef Catchment – Key Points |url=http://www.pc.gov.au/projects/study/gbr/docs/finalreport/keypoints |archive-url=https://web.archive.org/web/20080816135937/http://www.pc.gov.au/projects/study/gbr/docs/finalreport/keypoints |archive-date=16 August 2008 |access-date=14 March 2009 }}</ref> It is thought that the poor water quality is due to increased light and oxygen [[Competition (biology)|competition]] from [[algae]].<ref name=waterquality>{{cite web |author=Great Barrier Reef Marine Park Authority |year=2006 |title=Principal water quality influences on Great Barrier Reef ecosystems |url=http://www.gbrmpa.gov.au/corp_site/key_issues/water_quality/principal_influences.html |access-date=22 October 2006 |archive-url=https://web.archive.org/web/20061016155955/http://www.gbrmpa.gov.au/corp_site/key_issues/water_quality/principal_influences.html |archive-date=16 October 2006 |url-status=dead }}</ref>