Ecosystem Nutrition and Energy Flow

Autotrophs (producers like plants) are the base of every food chain because they convert solar energy into chemical energy.

Decomposers (such as bacteria and fungi) break down dead organic matter into nutrients, forming humus in the soil.

Chemoheterotrophs derive both their energy and their carbon from organic compounds. Photoautotrophs use light and CO2, while chemoautotrophs use inorganic chemicals and CO2.

Camouflage is a common adaptation in fish, allowing them to blend into their environment to avoid predators or ambush prey.

Organisms that produce their own food through photosynthesis are called producers or autotrophs.

Autotrophs are organisms that can produce their own organic compounds from inorganic sources, typically using sunlight.

The open sea covers a vast majority of the Earth's surface, and while its productivity per unit area is low, its sheer size makes it a significant contributor to global net primary productivity (NPP). Upwellings also play a role in nutrient cycling.

Phytoplankton are microscopic marine algae that form the base of the aquatic food web and contribute the vast majority of primary productivity near the ocean surface. Zooplankton are consumers, not producers.

Water, nitrogen, and carbon are major biogeochemical cycles. Precipitation is a process within the water cycle, not a cycle itself.

A habitat is the natural environment or specific place where an organism, such as a frog, lives and obtains its basic needs like food and shelter. A niche describes its functional role, not its physical address.

Ruminants are herbivores that have evolved to consume and digest fibrous plant material, such as grass, through a specialized multi-chambered stomach system.

Not all herbivores are ruminants. For example, horses and rabbits are hindgut fermenters, meaning they digest plant material differently than ruminants.

Heterotrophs are organisms that cannot produce their own food and must consume other organisms (plants, animals, or organic matter) to obtain energy.

Heterotrophs are defined by their need to ingest organic carbon by eating other organisms, as they cannot synthesize their own food from inorganic sources.

Autotrophs, such as plants, use sunlight to convert inorganic substances like carbon dioxide and water into organic energy-rich compounds through photosynthesis.