Summary of "Poles Apart"
What are Polar Biomes?
- Polar biomes are cold areas found near the North and South Poles.
- They have lower temperatures, less rain, and fewer sunny days than tropical rainforests.
Where Are They Located?
- Polar biomes are between:
- The Arctic Circle (66°33'N) and the North Pole (90°N)
- The Antarctic Circle (66°33'S) and the South Pole (90°S)
Weather and Environment
- These places experience:
- Freezing temperatures
- Harsh winds
- Frozen ground
- Most precipitation is in the form of snow.
- Six months of the year, there are very few daylight hours.
Plants and Animals
- In the Arctic, you can find:
- Dwarf shrubs
- Herbs
- Lichens
- Mosses
- Animals like caribou depend on these plants for food.
- Indigenous peoples, such as the Sami and Inuit, have learned to hunt for food, including whales, seals, and polar bears.
Life in Antarctica
- Antarctica is the coldest and windiest place on Earth with very few plants and animals.
- People only live there for science and eat food brought from ships.
What Affects Plant Growth?
- The Earth's tilt and rotation change how much sunlight the poles get.
- In winter, the poles have 24 hours of darkness, making it very cold.
- In summer, there are 24 hours of sunlight, but it's still cold because the ice reflects the heat.
Types of Polar Climates
- There are different polar climates:
- Subarctic or cold temperate
- Arctic or tundra
- Ice cap climate
Importance of Krill
- In Antarctica, most animals rely on krill, a small shrimp-like creature.
- Krill eat plankton, helping to reduce carbon dioxide in the water and forming a key part of the food chain for other fish and animals.
Climate Change and Its Effects
- Scientists study polar biomes to understand climate change and its effects on food chains.
- Over the last 30 years, 75% of Arctic sea ice has melted.
- Warmer water could help more plankton grow, which might increase plant productivity (NPP) in the Arctic.
Feel free to ask more questions about polar biomes!