I'm sorry, South East Asia
The CO2 is still mostly from bacteria that respire and is trapped in the ground water as the water goes from the surface, downwards.
We see a few beaver damns, far more in Canada, but they are semi common. they really hunted them for a long time, but have recovered. Giant water rats.
Some plants, but they uproot and cause other problems for many aquatic plants.
The crow's foot will grow in warmer water, the Moneky flow does not do very well.
Moss the same things.
For such springs to exists, you must have stable sources of water that have not been diverted or altered. Pierre Spring water from France is carbonated naturally also, so there are sources, but they have been used for other human purposes.
Weeds can still grow in most of the water in Portugal also, Hyacinth and Egeria, Myriophyllum, Crispy pondweeds, Hydrilla certainly...............careful what you ask for!!!
Bad weeds are no good.
Still, for all the land and natural resources we have, human encrochment has really really harmed Califonria. We have lost 96% of our wetlands. 94% of the old growth forest, most of the plant communities are invaded by weeds.
Water has been really altered on a scale never before seen anywhere in California.
About 30 Billion dollars a year in Agriculture production in this state alone drives politics and business.
The Environment has little chance. It is only where they cannot get at the water or it is too far away or a state park, National park etc..........that these places are safe, isolation helps.
Nothing can be grown in Hat Creek....it's nothing by hundreds of meters thick of volcanic rock and pumic. The creek eventually flows into the Sacramento River a hundred or so miles away, so it gets used. Logging is common in the area also.
Regards,
Tom Barr