One of the reasons Jamaica Bay is impacted and severely stressed is pollution.Such an issue if JFK Airport use of De-icing chemicals and its ensuing runoff where there is no capture of the toxic chemical. Here's a link to a report of a meeting this past week about environmental impacts on the bay including runoff toxic agents
http://www.sheepsheadbites.com/2011/11/jfk-airport-plan-to-discharge-toxic-chemicals-into-jamaica-bay-sparks-backlash-from-environmentalists/?mid=535