Producers, which are the base of the food chain for ecosystems are essential and do not require oxygen to cycle energy and matter, as they create oxygen through photosynthesis. Plants are producers that use this process to capture light energy and use it to convert carbon dioxide and water into an organic substance known as glucose.
Answer: No light = emanate unescapable death if that is your question
Explanation: If starvation doesn't kill you some other person trying to survive will now if you will excuse me I am going to go tell someone else the harsh reality we all live in
4-2 years that is how long they can live
Without reproducing biodiversity will decline dramatically because all species' would go extinct.