Summary of Marine Biomes and Fisheries
Marine Biomes
- Biggest Water Areas: Marine biomes are the largest areas of water on Earth, covering about 75% of the planet.
- Oceans and Reefs: They include oceans, coral reefs, and estuaries (where rivers meet the sea).
- Productivity: Oceans are super productive! They create about eight times more food (NPP) than all the land together.
- Upwellings: Coastal upwellings bring up nutrient-rich water, which helps fish populations grow big and strong.
- Light and Depth: The water's depth affects how much light gets through, which decides what plants and animals can live there.
- Phytoplankton: The top 250 meters of the ocean is the richest part because it has lots of tiny plants called phytoplankton.
Fishing
- Important for People: People have relied on fish for food for thousands of years.
- Protein Source: Fish make up about 16% of the world's protein for eating.
- Fish-catching Methods: Fish are caught in many ways, from simple handlines to large boats and nets.
- Fish Food: Not all fish are eaten; around 40% is turned into fish food for fish farms.
- Preservation Choices: Some fish are sold fresh; most are frozen, canned, or made into oil.
- Illegal Fishing: Catching too many fish makes it harder for fish to survive, and that’s a problem.
- Australia's Fishing: Australia has a big fishing area, but the number of wild fish caught has dropped by about 62% in the last 10 years.
Environmental Challenges
- Less Food Production: Coastal areas are losing their ability to produce food because of low oxygen in the water.
- Dead Zones: Pollution and nutrients from farms can create dead zones where nothing can live.
- Trash in the Ocean: Lost fishing gear and plastics can trap and harm sea animals.
- Big Ocean Vortexes: Ocean currents can trap garbage in large areas called gyres.
- Acidic Oceans: When oceans absorb carbon dioxide, it changes the water’s chemistry, hurting shellfish and other animals.
- Coral Reefs in Danger: Warmer oceans can stress coral and their algae friends, causing bleaching and weakening the reefs.
Now you know more about marine biomes, fish, and the problems they face! 🌊🐟