Here's the setting:
Advanced human civilizations of an ancient time destroyed the ozone layer of the planet. They managed to create an self-sustaining artificial layer which would function exactly as the original, however (through miscalculations maybe, I haven't figured that out yet) it would not only absorb harmful UV lights but also a big portion of visible light.
But not so long after the planet still became a wreck and humans almost killed each other to extinction (basically what happens to us in a not-so-far future?). Some found a way to survive until the planet became stable again (not sure how much time exactly but probably in the order of thousands/millions of years?) maybe by putting themselves to cryogenic sleep or something to wake up when the planet becomes livable again (still haven't figured that out, not very relevant).
Point being, during the time the planet stabilized and life and nature reclaimed their territory without human intervention, the artificial layer was still active, so everywhere everything was very dim.
What is going to be directly affected by having less sunlight (specific types of species for example)? Flora dependent on photosynthesis will still get some light, but is it going to be enough (especially to sustain ecosystems built around them)?
What are some options/alternatives for this light-dependent life to evolve into/switch to?
I read all of the questions pertaining to worlds with little to no light, but they were either about total darkness, or very short darkness periods, or about how humans cope, or about having specific climates that are not very Earth-like, etc.
Nevertheless, I saw stuff like:
- Bioluminescence (I'd love to have a lot of it)
- Different plants colors, if plants start absorbing all light, or different light
- Chemosynthesis or similar system that doesn't work with light
Things to keep in mind:
- It's an Earth-like planet, 1.4 times the mass of Earth
- In a double planet system with another Earth-like planet (about the same mass as Earth) (this could cause tidal forces)
EDIT: I came to realize I don't have enough information about the environment to try thinking about what grows in it for now. I'll open a new question about that and come back to this topic later (with a more specific question -- it's my first one and I made so many mistakes). I'd still appreciate your thoughts/ideas though, and thanks to anyone who took the time to answer, it helped!