Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

  • Announcements

    • Rick

      Members Only Fluid Forum View   08/08/2017

      Fluid forum view allows members only to get right to the meat of this community; the topics. You can toggle between your preferred forum view just below to the left on the main forum entrance. You will see three icons. Try them out and see what you prefer.   Fluid view allows you, if you are a signed up member, to see the newest topic posts in either all forums (select none or all) or in just your favorite forums (select the ones you want to see when you come to Fishing Minnesota). It keeps and in real time with respect to Topic posts and lets YOU SELECT YOUR FAVORITE FORUMS. It can make things fun and easy. This is especially true for less experienced visitors raised on social media. If you, as a members want more specific topics, you can even select a single forum to view. Let us take a look at fluid view in action. We will then break it down and explain how it works in more detail.   The video shows the topic list and the forum filter box. As you can see, it is easy to change the topic list by changing the selected forums. This view replaces the traditional list of categories and forums.   Of course, members only can change the view to better suit your way of browsing.   You will notice a “grid” option. We have moved the grid forum theme setting into the main forum settings. This makes it an option for members only to choose. This screenshot also shows the removal of the forum breadcrumb in fluid view mode. Fluid view remembers your last forum selection so you don’t lose your place when you go back to the listing. The benefit of this feature is easy to see. It removes a potential barrier of entry for members only. It puts the spotlight on topics themselves, and not the hierarchical forum structure. You as a member will enjoy viewing many forums at once and switching between them without leaving the page. We hope that fluid view, the new functionality is an asset that you enjoy .
Sign in to follow this  
SKIPPERS KID

Study Finds Nitrates up in lake Superior

Recommended Posts

SKIPPERS KID

Study finds nitrates up in Lake Superior

John Myers Duluth News Tribune

Published Thursday, May 31, 2007

The level of nitrates in Lake Superior has increased five-fold over the past 100 years and continues to increase at a steady rate, a University of Minnesota study has found.

The study, published today in the journal Geophysical Research Letters, found that the nitrate isn’t necessarily coming from the expected culprits.

The increase in nitrates has been steady in the big lake, not reflecting the rapid increase in fertilizer and fossil fuel use and over the past 50 years.

RELATED CONTENT

John Myers Archive

“The assumption has been for years that we’re getting atmospheric deposition from agricultural fertilizer and fossil fuel combustion. But the increase in the lake water doesn’t correlate with what is falling from the sky,’’ said Robert Sterner, chief researcher on the project for the University of Minnesota. “The nitrate in the lake can’t be accounted for by what’s falling from the sky.’’

Sterner said it’s unclear where the nitrates are coming from. They could be produced by a natural process in the lake, or from some other source of nitrogen. It’s not coming large amounts di-rectly from urban or agricultural runoff because most of the lake’s watershed is forested, Sterner said.

Most lakes use up their own nitrogen through plants. But with so few plants in Lake Superior, the nitrogen keeps building, Sterner said.

The level of nitrates in Lake Superior now sits at 25 micromolars, up from 5 micromolars in 1906. It would take levels above 700 micromolars of nitrate to be considered unsafe for human drinking water. A micromolar is a concentration of one-millionth molecular weight per liter.

While nowhere near a threat to people, it’s unclear what effects increased nitrates may have on other parts of the ecosystem or why they continue to increase. Sterner and other University of Minnesota scientists plan to look at the relationship of nitrate to Lake Superior’s unusual level of carbon use over carbon production.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  



  • Posts

    • cookie129
      Here's the scoop, Buddy Hillmen is now allowing 1/2 ton trucks with single axle wheel houses.. Also any size wheel house pulled by wheeler or side by side. Drive slow there's a bridge plate about a mile out. Do not try and cross berm to the south of road. I have all ready seen a couple tracks where they did not make it through. be safe use commom sense and enjoy such a grand lake. On a side note. Last weekend a small fish house was set up about 200 yards from me. Sunday I was driving by and noticed a plastic bag so I stopped to pick it up. It was pushed down into the augured hole and turned out to be a bag of poop. From now on I will be taking random pics of wheel houses and if I find that kind of crap again I will be reporting to dnr and expect a possible ticket in the mail.  
    • certified jumbo
      Some are fishing it.   But the winds kept parts open till Monday.  Be cautious as you go.  Ice thickness really varies.
    • Naturboy
      I checked ice earlier and there was 2 different ice sheets one was 4” ant that time and the other was 1 1/2”. The 1 1/2” ice was most of the lake. Be very careful on there. 
    • certified jumbo
      Most coho being on Minnesota side are 12" - 17".   Occasional bigger fish.  Very few 3# pound fish.
    • iiccee63
      Had to go out there today. 4" was the least I saw. Mostly 5 ".
    • eyeguy 54
      oops my bad, female...   musta been low on oxygen. LOL  south of brainerd, north of texas. 
    • Bluegill Dan
      Thank you
    • Cliff Wagenbach
      SM, Nice meeting you today! I am sure we will see each other again! We ended up catching 6 walleyes and 6 tulibees. Kept 3 walleyes from 14" to 19-3/4". We quit at 1:00pm also.  
    • EyeChsr
      drove around the lake last night, the open spot has moved east back to halvorson pt. and extends west/ northwest and has gotten much bigger.  numerous small spots opened up west of peters resort to baycrest. I would say from the beach to a little before halvorson pt. over to the dnr landing and west to bottle bay should be good to go, that's where the majority of houses are out.
    • smurfy
      where'd ya say that was!!!!!!!