This topic is a bit more on the side of my academic focus. I am looking at controlling some invasive aquatic plants in Lake Tahoe , CA. Potamogeton crispus specifically.
This is a native plant in Europe and Asia, but a pretty bad weed in the USA and Canada It also can and does hybridize with native pondweeds.
Many would not think of Lake Tahoe, an oligotrophic alpine lake at 6278 ft above sea level, cold clear and sandy granite water shed. It never freezes, too big and deep for that. About 21 miles long x 12 miles wide and about 1000ft deep on average.
So only near shore zones can support submersed plants.
One neat milfoil is a native, M quitense, Andean milfoil, there's also M sibericum.
Several nice pondweeds, Richard's pondweed is a pretty thing, Hipperus which is found in Greenland etc, under ice etc is present in large amounts on the south end of the lake.
Some areas of the boat harbors get warmer(60's F) and support warm water fish and other aquatic weeds. This causes a huge mess.
This is the nice native:
http://www.google.com/search?client...c.r_pw.&fp=8f6073eaa2ffaabc&biw=1920&bih=1017
This is near my study site and where they are doing some research on Milfoil.
http://www.google.com/search?hl=en&...&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi
We had this place all to ourselves this morning on the boat. Water falls where gushing, snow on most of the mountains and about 60F.
Not bad place to do research eh?
Cold water.....but......it does warm up to bearable temps in the late summer, early fall.
Boats have brought most all of these invaders to this lake. They have strict policies to prevent new species from coming in and wash down of the boats and inspections are required at marinas before they let you put them in the water.
Prevention cost much less than control projects always..........
This is a native plant in Europe and Asia, but a pretty bad weed in the USA and Canada It also can and does hybridize with native pondweeds.
Many would not think of Lake Tahoe, an oligotrophic alpine lake at 6278 ft above sea level, cold clear and sandy granite water shed. It never freezes, too big and deep for that. About 21 miles long x 12 miles wide and about 1000ft deep on average.
So only near shore zones can support submersed plants.
One neat milfoil is a native, M quitense, Andean milfoil, there's also M sibericum.
Several nice pondweeds, Richard's pondweed is a pretty thing, Hipperus which is found in Greenland etc, under ice etc is present in large amounts on the south end of the lake.
Some areas of the boat harbors get warmer(60's F) and support warm water fish and other aquatic weeds. This causes a huge mess.
This is the nice native:
http://www.google.com/search?client...c.r_pw.&fp=8f6073eaa2ffaabc&biw=1920&bih=1017
This is near my study site and where they are doing some research on Milfoil.
http://www.google.com/search?hl=en&...&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi
We had this place all to ourselves this morning on the boat. Water falls where gushing, snow on most of the mountains and about 60F.
Not bad place to do research eh?
Cold water.....but......it does warm up to bearable temps in the late summer, early fall.
Boats have brought most all of these invaders to this lake. They have strict policies to prevent new species from coming in and wash down of the boats and inspections are required at marinas before they let you put them in the water.
Prevention cost much less than control projects always..........
