Moreton Bay's sea grass beds and corals are subject to ongoing threat from soil run-off caused by agriculture in the Lockyer Valley and construction activity in south east Queensland. Professor John Olley has noted that mud is now flowing out to Moreton Bay 10 times as fast as it did before Europeans settled in the region 120 years ago. The 2013 Healthy Waterways Report shows a downward trend in the ecosystem health of Moreton Bay over the period from 2012 to 2013, with water quality also affected by major flood events such as those in 2009 and 2011.