Trophic pyramid | Definition & Examples | Britannica
网页trophic pyramid, the basic structure of interaction in all biological communities characterized by the manner in which food energy is passed from one trophic level to the next along the food chain. The base of the pyramid is composed of species called autotrophs, the primary producers of the ecosystem.
Food chain - Wikipedia
网页A food chain depicts relations between species based on what they consume for energy in trophic levels, and they are most commonly quantified in length: the number of links between a trophic consumer and the base of the chain.
Food Chains and Webs - National Geographic Society
网页Producers, who make their own food using photosynthesis or chemosynthesis, make up the bottom of the trophic pyramid. Primary consumers, mostly herbivores, exist at the next level, and secondary and tertiary consumers, omnivores and carnivores, follow.
Food Chain and Food Webs explained - Wild Earth Lab
网页2021年8月6日 · Each layer on the pyramid represents a position in the food chain, called a trophic level. A pyramid food chain diagram reminds us how it takes many organisms in lower trophic levels to support a just few organisms in higher trophic levels. Food chains vary …
Food web | Definition, Ecosystem, Food Chain, & Examples
网页2024年8月28日 · Food web, a complex network of interconnecting and overlapping food chains showing feeding relationships within a community. A food chain shows how matter and energy from food are transferred from one organism to another, whereas a food web illustrates how food chains intertwine in an ecosystem.
9.3: Food Chains and Food Webs - Biology LibreTexts
网页2023年10月31日 · A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another; the levels in the food chain are producers, primary consumers, higher-level consumers, and finally decomposers.
Ecological pyramid - Wikipedia
网页An ecological pyramid (also trophic pyramid, Eltonian pyramid, energy pyramid, or sometimes food pyramid) is a graphical representation designed to show the biomass or bioproductivity at each trophic level in an ecosystem.
Food Chain - National Geographic Society
网页2023年10月19日 · The food chain describes who eats whom in the wild. Every living thing—from one-celled algae to giant blue whales ( Balaenoptera musculus )—needs food to survive . Each food chain is a possible pathway that energy and nutrients can follow through the ecosystem .
Ecosystem - Trophic Levels, Food Chains, Interactions
网页2024年8月15日 · The movement of organic matter and energy from the producer level through various consumer levels makes up a food chain. For example, a typical food chain in a grassland might be grass (producer) → mouse (primary consumer) → snake (secondary consumer) → hawk (tertiary consumer).
Energy Flow Through an Ecosystem - National Geographic Society
网页Trophic levels provide a structure for understanding food chains and how energy flows through an ecosystem. At the base of the pyramid are the producers, who use photosynthesis or chemosynthesis to make their own food. Herbivores or primary consumers, make up the second level.