Pages tagged with “overfishing”

• Overfishing

  Oceanic life starts with the smallest creatures. Microscopic plankton convert sunlight and atmospheric carbon dioxide into oxygen – one species of blue-green algae, Prochlorococcus, is present in such abundance that it produces one out of every five breaths we take. These are scooped up by grazers such as krill, which are then eaten by small baitfish – anchovies, herrings and…