I suspect that the whole “knee bone connected to the thigh bone” aspect of environmental issues is what fascinates scientists and journalists alike. Frustrates them both, too. Nowadays it borders on cliche to note the complex interrelationships that make up an ecosystem. Pull a thread on one corner of an ecosystem – an invasive species introduction, for example – and the consequences elsewhere are surprising, fascinating and oftentimes troubling. That’s true of a common summer environmental story – the inevitable closing of beaches due to bacterial contamination. It’s a good story for a journalist – human health, economic impact, political posturing.