Mercury Merganser
Posted by david on 27 Jan 2010\em> | Tagged as: Coal, environment, introduction, sustainability
Hello again, welcome to another guest post by David… it’s been quite awhile since my last post. For new readers, I’m a behind-the-scenes researcher for Ground Truth Trekking. I don’t go on any of the cool trips but I help write and research many of our articles such as those on coal. I’ve been living in Belgium for the last few years and have recently moved to Davis in Northern California.
While I really enjoyed living in Europe, I always missed nature… in particular large open wild spaces like those that can still be found in the Western US. I love to be able to hike without seeing much indication of people. I also like the fact that lands are often accessible to the public in the US: I can go hiking in National Parks, Wilderness Areas, BLM land etc. Europeans are always amazed when I described the concept of BLM land, truly public places where one could just go and hunt, fish, hike, camp, or whatever.
Scouting
When I first arrived here in Davis I began to happily scout the area for hiking, packrafting, fishing, and hunting possibilities. And I was excited with what I saw; Northern California is chock-full of outdoor opportunities. I’ve caught some nice fish, paddled some fun rivers, and taken a lot of pictures. The landscape here is very different than Colorado where I grew up, or Washington where I spent many years.
In addition to hiking, I also wanted to go bird hunting. Now I should mention that my version of bird hunting isn’t really typical. I have no boat, dog, camouflage, whistles, or really much of anything. I just like to hike around a likely looking area with a shotgun… which basically means I’m just hiking with an extra weight in my arms. But occasionally I get lucky.
The hunt
A few weeks ago I spent the day scouting out a wildlife area in the hills for hunting prospects. A beautiful area, thousands of acres of BLM and State of California land, I didn’t see a soul or much sign of humans anywhere and I saw plenty of ducks, quails and rabbits. So not long thereafter I went hunting there and had a wonderful time. I wandered the hills for hours without seeing any signs of humans other than the occasional bit of windblown trash. I also shot a duck near a river and brought it home and ate it with my family.
Rude awakening
Curious to read more about this species of duck, and the area where I had been, I turned to the internet: “The common merganser is a non-migratory fish-eating duck with a serrated bill.” Cool. Then I discovered that the upstream lake which feeds the river I’d been following is an EPA superfund site due to mercury contamination! Apparently there were a large number of mercury mines in the area a long time ago, and they suspect over 100 metric tons of mercury was dumped into the lake. The fish consumption advisories for the entire watershed basically suggest that if you’re a non-reproducing male you might consider eating some very occasionally and if you’re a woman or child forget about it. I even found one study where some researchers calculated that the fish are so contaminated that the common mergansers in the area were liable to suffer reproductive harm from the bioaccumulation of mercury. I found this information to be simultaneously worrisome and extremely frustrating.
Having done research on the topic of mercury contamination, I’m well aware of the fact that eating a fish-eating duck downstream of a mercury mine is probably a really bad idea. Mercury bioaccumulates in the food chain, meaning that predators collect more and more mercury as they eat contaminated prey. But it never occurred to me to research the proximity of Superfund sites to my next hunting prospect.
Then and now
To me this is a personal example of the consequences of ongoing environmental degradation. The mercury contaminating my duck was dumped into the environment a long time ago, at a time when we didn’t know as much about the toxic impacts it would have. But looking ahead, we have similar problems waiting to happen or already happening. Toxic piles of mine tailings could eventually escape their engineered barriers, for example at a mine like Red Dog, or Pebble Mine if it is eventually built. Fish and birds in currently pristine rivers could also become unsafe to eat. In these cases we know the consequences of our actions… and still as a society we value short-term economic gain over long-term consequences.























