In article , says...

In article ,
says...

On Tue, 9 Apr 2013 07:55:53 -0400, BAR wrote:

In article , says...

On Mon, 08 Apr 2013 14:04:00 -0400, J Herring
wrote:

...for losing.

http://www.washingtonpost.com/national/health-science/2013/04/07/a0c29f48-972f-11e2-b68f-dc5c4b47e519_story_1.html

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Salmonbait

It sounds like you have a problem with a lack of aquatic vegetation.
That is what brings down the carbon numbers and boosts DO.
Have they got a handle on the waste oil that comes down the storm
drains and the sewer treatment plants yet? They said that used to coat
the bottom and stifle grass when I was up there. It may be old bad
problems finally catching up with you.
Until you get people to stop flushing oil down the toilet and start
processing street runoff, you are not going to have a clean bay.
I am really surprised they are not buying old oil for reprocessing.

Once this becomes a target for "scrappers" a lot of our waste oil
problems might go away.

The oil draining thorugh the storm sewers may not be solved yet but, they have painted
"Chesapeake Bay Drainage" on many storm sewer intakes. They haven't been keeping up witht
painting the words lately in Montgomery County.

The once perceived threat to the Chesapeake was the Hydrilla, which actaully turned out to be
a blessing for the bass fishing.

Initially hydrilla may not seem to be a problem but the trouble starts
when it gets old and dies. It creates a mat of rotting vegetation on
the bottom that eats the dissolved oxygen releasing the carbon
dioxide. The CO2 promotes more hydrillia growth and pretty soon you
have nothing but hydrilla.
You can end up with stratified water where the top may show a decent
DO number but the water at the bottom is a dead zone.
They actually rake the lakes here to thin out this hydrilla mat.
Natural sea grasses are a far better plant to have. They don't grow as
fast so they don't create as much biomass to be oxidized when it dies.

Where is this growing? I did not think it was that salt tolerant. This
must be a north bay thing

Gee, just to think, if you leave nature alone, ie: natural sea grasses,
things work out in harmony. It's when man thinks he can alter nature
that the problems occur. Look at what happened years ago when man
decided it would be a great idea to drain the Everglades and make the
water flow where they thought it should.

Ocean traversing ships and wooden pallets have been the primary bearers of invasive species.