I’m not sure I understand your position.
As far as the species you mentioned, didymo is a native species that is simply increasing it’s range. Mostly due to the increase in trailered boat use. The impacts of over-populations of didymo are minimal, and correct themselves quickly. Didymo provides extra food for small phytoplankton, which in turn provides more food for small minnows, meaning more survive to feed larger fish like bass and trout. The ‘damage’ to the environment is that over-populations cause a slimy, (but harmless) flim on rocks and vegetation that recreational users find unpleasant.
Mud snails are an accidental import from New Zealand. Not only is thier environmental impact minimal, it is actually somewhat beneficial. Mud snails do compete with local snails for resources, but by the same token, they provided excellent forage for crawfish, minnows, aqualtic birds, and especially smallmouth bass, who consider them a delicacy. In all waters that they have been introduced in, smallmouth populations have increased significally, both in numbers, and size. They would have little impact on trout populations because they require a soft bottom (hence the name ‘mud snail’), which would rule out most trout streams, having mostly rocky bottoms. The fear of mud snails is that they may replace native snail species, which so far, has not been the case. Zebra Mussels immigrated from Eastern Europe. Again, the ‘environmental’ damage is minimal, and limited mostly to human endeavors. Zebra mussels are, in fact, very beneficial, as they are one of the best things in the world at filitering water and removing pollution, and harmful chemicals. In all waters where they are present, the water quality has improved greatly. The ‘damage’ they do is that, like barnicles, they attach to EVERYTHING…rocks, dams, boats, other mussels…anything that seems stable. They can clog water intakes on dams, necesitating removal and cleaning, which costs tax-payer money (but isn’t that what it’s for, anyway???). On the other hand, Zebra mussels provide great forage for muskrats, aquatic birds, shellcrackers, freshwater drum, and many other fauna.
Instead of destroying an entire ecosystem to try to eradicate one species (which will probably not work anyway), we should find ways to use them, such as placing Zebra Mussels in waters that have the warning signs saying not to eat the fish due to mercury levels in the water, like Ft. Louden Lake, NIckajack Lake, Lake Chickamauga, the Tennessee River, the Cumberland River, etc…, and let them filter out the chemicals. In other words, instead of griping about too many unwanted apples…make applesauce…
Then why all the fuss about mud snails, zebra mussels and Didymo? Who cares, let 'em take over, why bother, hmmmm…sounds like another issue in the forefront of the news.
Seriously, why should we give a rat’s arse about ANY invasive if it does more bad than good trying to stop it and we got lucky with brown trout? Maybe we could even make escargot out of mud snails and veggie burgers out of rock snot?
Is it because snakes, pigs and snakeHEADs don’t impact trout fishing??? Boy if a snakehead or two ended up on some pristine trout stream the TU crowd would be going ballistic over this stuff looking for someone to blame and something to ban.
Hypocrisy runs rampant. It’s no wonder lots of folks could care less about the invasives it’s hip to worry about!
Whiskey will get you through times of no fish, better than fish will get you through times of no whiskey.
FUBO