Ecosystems are mostly local - what this represents is the erasure of the rainforests and their conversion to largely animal-free cropland. The impact of that is yet another large CO2 emission.
I think this is a misconception. Everything is interconnected. Did you know that some species of bird migrate up to 8700mi every year? (https://en.wikipedia.org/wiki/Bird_migration)
So do many insect species (butterflies!), fish, whales, sharks. And, as apex predators with wide ranges, sharks have a huge impact on ecosystems across the globe (and losing them is very, very bad: https://www.livescience.com/9716-loss-top-predators-causing-...).
> the erasure of the rainforests and their conversion to largely animal-free cropland.
Additionally, even when natural lands are converted to grazing land for farm animals, rather than cropland, the number of animals is still likely to decrease. Wild animals are strongly tilted toward small species and the same piece of land will support many fewer large animals even if the total animal biomass is similar.
I think this is a misconception. Everything is interconnected. Did you know that some species of bird migrate up to 8700mi every year? (https://en.wikipedia.org/wiki/Bird_migration) So do many insect species (butterflies!), fish, whales, sharks. And, as apex predators with wide ranges, sharks have a huge impact on ecosystems across the globe (and losing them is very, very bad: https://www.livescience.com/9716-loss-top-predators-causing-...).
We're royally fucking up the entire planet.