I will give it a go on a few. Listed by album order not file name.
Pic 8, 17 is a type of thimble-berry. Big black tasty berries the animals get before you do.
Pic 5, 16, 18 Duckweed. Maybe you can get rid of it, but it is common AFAIK in ponds with a lot of nutrients.
Pic 14 is hard to tell without a sense of scale. Could be grass, could be something else.
Pic 13, seed heads of asters. Definitely a keeper.
Pic 12, Bittersweet. Great for making wreaths and winter decorations. May be a nuisance in the wrong places. I find in the right places is adds a nice splash of color in the winter.
Pic 11, no clue.
Pic 10, a mush of filament type algae. Probably a couple of types in there.
Pic 9, cannot tell.
Pic 7, creeping crud. Ok, seriously though someone else here may be better suited. I mostly know terrestrial stuff.
Pic 6, I think it is the same stuff I am trying to identify, I think it is native around NY. Perhaps:
http://aquaplant.tamu.edu/plant-identification/alphabetical-index/curly-leafed-pondweed/Pic 4 looks like dried-up Sweet Pea. Nice plant to look at, toxic to eat the beans.
Pic 3, everything green that grows in water. j/k
Pic 2, possibly Water Hemlock, our most toxic (if ingested) native species.
http://www.natureskills.com/outdoor-safety/water-hemlock/ if you have kids or animals this is the one to nuke.
Pic 1, old dried algae caught in dried unidentifiable flowers.
-Mark
