An article in last month’s National Geographic examines the loss of genetic diversity in the world’s crops, and this infographic, in particular, has been making the rounds of the Internet, at least in the corners where foodies and activists lurk. It shows the decline in diversity of common American garden vegetables between 1903 and 1983: more than 90 pecent of the varieties in existence at the turn of the twentieth century are now long gone. That loss of diversity has consequences beyond our inability to sample the flavor of a long-lost apple: with so little genetic stock available, changes in climate or a new disease might easily wipe out an entire crop, such as wheat, and we’d have no way to rebuild it.
It’s a lovely graphic, well designed and (if you aren’t already familiar with the issue) appropriately shocking. Like too many such graphics, though, this one doesn’t inspire much beyond despair. What can I, or anybody, do about it? The accompanying article gives the answer: I don’t have to do anything, because there are institutional “seed banks” working to preserve the genetic stock still remaining on the world’s farms. I’ve been shocked and then duly comforted; no need to get out of my reading chair. Let the experts handle it.
Except that this isn’t the right answer, or at least isn’t enough of one. Seed banks, valuable and worthwhile as they are, can only preserve the remaining — let’s say, as a round number — ten percent of the genetic diversity that once existed. But that ten percent is dangerously little. And institutions and experts can’t rebuild the remaining ninety percent, because they didn’t build it in the first place. Continue reading “A diversity of gardeners”