The area near present-day Port Isabel was used as a resort for Spaniards after watersellers came ashore in the late 18th century looking for freshwater supplies.
Just remember that if you have freshwater, look for a freshwater kit, and if you have saltwater, look for a saltwater kit.
In her own work, Hoorn says she has examined "meters and meters of sediment that look purely freshwater," with vestiges of saltwater species like plankton and mangrove pollen limited to just a centimeter or two.
On one hand, it might mean that economically richer countries are more able to look after freshwater biodiversity, but conversely, there is a danger that these more affluent nations might be more likely to develop and degrade their freshwater ecosystems by having the capital to make wholesale changes.
Look at freshwater versus saltwater pearls.
On "Monster Fish," Zeb Hogan, a biologist, goes all over the world looking for giant freshwater fish, "from 600-pound goldfish to car-sized catfish to mysterious river sharks," as a news release announcing this summer's season put it.
The seafood department stocks 30 kinds of live fish and shellfish, including Dungeness crabs for around $7.99 a pound, a nasty-looking freshwater fish called marble goby and, soon, live frogs.
"River Monsters" (Sun., 10 p.m. ET on Animal Planet) host, biologist and extreme angler Jeremy Wade travels the world looking for man-eating freshwater fish.
The United Nations Environment Programme (UNEP) has set up a Freshwater Portal, located online at http://freshwater.unep.net/, as a centralized resource for anyone looking to learn more about freshwater use, resources, and scarcity.
The drought lasted for about a century and a half and would have forced the Rapanuis to look for alternative freshwater sources.
