I think the question is about which non-native invasive plant or organism can survive long periods without water. I don't think we need to use Death Valley as

I think the question is about which non-native invasive plant or organism can survive long periods without water. I don't think we need to use Death Valley as a test bed. Normal practice is to wash all your gear before you visit a new body of water so that you don't spread things between them. I said normal as if that is the way boaters operate. Invasive species spreading all over lakes in Texas would suggest that the normal case is quite different here. Since the responsibility for compliance falls on the boaters, kayakers, canoeists, then we are stuck with whatever they consider normal. That's the problem. A lot of people fail at simple tasks designed to preserve wild places for later generations enjoyment.