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A reminder of the general rule that "invasive species" with "no natural enemies" will only be such up to the point until some other species learns how to predat

A reminder of the general rule that "invasive species" with "no natural enemies" will only be such up to the point until some other species learns how to predate on them. We observe the same in Sweden where the seemingly unstoppable spread of the Spanish slug (Arion vulgaris) is coming to a halt as the common blackbird is acquiring a taste for it. This is the reason I view the current all-out war against "invasive species" in the EU with some skepticism. All species have likely been invasive at some point, but nature has always found a way to keep them in check. It is how ecosystems change over time. Except in the case humans of course. We have no, and will not have, any natural enemies. We instead need to use our sense and powers of foresight to prevent ourselvees from destroying the habitat for both ourselves and other species. It's not going all that well AFAICT.

h0l0cube 4y ago
An interesting strategy used in Australia, is to drop cane toad baits ahead of the encroaching population so that native species don’t eat them, and reducing population loss – which is the main problem. > Cane-toad sausages laced with a nausea-inducing chemical have been dropped from helicopters ahead of the toads' front line. > The aim is for animals to become sick from eating the baits, teaching them to avoid the toads just as the pest moves into their habitats. https://www.abc.net.au/news/2022-02-14/cane-toad-sausage-drops/100824066 https://www.abc.net.au/news/2022-02-14/cane-toad-sausage-dro...
- stareatgoats 4y ago
  There is obviously a long tradition of trying to stop the negative effects of invasive species, especially as it affects livestock and crops. Sometimes with chemicals, sometimes by introducing "natural enemies" in the environment, and now also as in your example by sometimes teaching livestock to avoid the new menace. Many times causing other, sometime serious, problems instead. I'm not saying let nature have its course at all times, only that over time nature will likely solve the problem of an invasive species in its own way, and we should learn to expect it and work with it.
  - h0l0cube 4y ago
    I think with cane toads, the lethality and sheer number has very different implications. There are many species in Australia that are on the brink of extinction, whereas in other continents that have been affected longer by human intervention the species loss has already happened.
rozab 4y ago
>nature has always found a way to keep them in check Often that looks something like 'they hunted their prey to extinction and then their numbers levelled out'
hulitu 4y ago
> We have no, and will not have, any natural enemies. As the Romans said " homo homini lupus" - Man is wolf to man. With a bit of greed and a nuclear war the chances of survival for other species will greatly increase.

h0l0cube 4y ago

An interesting strategy used in Australia, is to drop cane toad baits ahead of the encroaching population so that native species don’t eat them, and reducing population loss – which is the main problem. > Cane-toad sausages laced with a nausea-inducing chemical have been dropped from helicopters ahead of the toads' front line. > The aim is for animals to become sick from eating the baits, teaching them to avoid the toads just as the pest moves into their habitats. https://www.abc.net.au/news/2022-02-14/cane-toad-sausage-drops/100824066 https://www.abc.net.au/news/2022-02-14/cane-toad-sausage-dro...

stareatgoats 4y ago
There is obviously a long tradition of trying to stop the negative effects of invasive species, especially as it affects livestock and crops. Sometimes with chemicals, sometimes by introducing "natural enemies" in the environment, and now also as in your example by sometimes teaching livestock to avoid the new menace. Many times causing other, sometime serious, problems instead. I'm not saying let nature have its course at all times, only that over time nature will likely solve the problem of an invasive species in its own way, and we should learn to expect it and work with it.
- h0l0cube 4y ago
  I think with cane toads, the lethality and sheer number has very different implications. There are many species in Australia that are on the brink of extinction, whereas in other continents that have been affected longer by human intervention the species loss has already happened.

rozab 4y ago

>nature has always found a way to keep them in check Often that looks something like 'they hunted their prey to extinction and then their numbers levelled out'

hulitu 4y ago

> We have no, and will not have, any natural enemies. As the Romans said " homo homini lupus" - Man is wolf to man. With a bit of greed and a nuclear war the chances of survival for other species will greatly increase.