River systems, especially the example of the Murray-Darling in Australia, are featured at a new (well, new to me) website at www.climatechangetriage.net. Here the ideas of medical triage are applied to all sorts of ecosystems and climate change disasters (present and future). Worth a look.
Glad James Martin identified climate as a critical issue. Many others do of course and I found an interesting slant at http://www.climatechangetriage.net where the ideas of medical triage are applied.