Use a mathematical representation to support claims for the cycling of matter and flow of energy among organisms in an ecosystem.

  1. Environment

    Ocean of the future may make shrimp small and colorful

    Carbon dioxide released into the air can end up in the ocean, making it more acidic. A teen showed that this acidification could shrink shrimp and make them more colorful.

  2. Tech

    Water sensor quickly detects algal poison

    A new sensor can detect poisons from harmful algae within minutes so that drinking-water plants can start timely treatments.

  3. Ecosystems

    Earthworms: Can these gardeners’ friends actually become foes?

    Asian jumping worms can strip leaf litter from floor of U.S. forests, new data show. Many native plants need that leaf litter for their seeds to germinate.

  4. Ecosystems

    Algae embedded in sea ice drive the Arctic food web

    Scientists traced where zooplankton in the Arctic get their energy from. Many open ocean species rely on algae found in sea ice, which is disappearing.

  5. Animals

    Eating toxic algae makes plankton speedy swimmers

    After slurping up harmful algae, copepods swim fast and straight — making them easy prey for hungry predators.

  6. Animals

    Scientists Say: Copepod

    Copepods are tiny crustaceans. They eat phytoplankton and float in the water column, although some live in freshwater and on the sea floor.

  7. Health & Medicine

    The cool science of hot peppers

    Why are chili peppers spicy? Why does anyone crave food that burns? Uncovering this fiery veggie’s secrets could help fight pain and obesity.

  8. Animals

    Pollen can become bee ‘junk food’ as CO2 rises

    Increasing levels of the greenhouse gas are changing diminishing the food value of pollen, bees’ only source of protein.

  9. Microbes

    This microbe thinks plastic is dinner

    The bacterium Ideonella sakaiensis chows down on one type of polluting plastics. That means it could become helpful in cleaning up environmental waste.

  10. Agriculture

    Made in the shade

    Agroforestry combines woody plants and agriculture. Growing trees alongside crops and livestock benefits wildlife, environment, climate — and farmers.