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en.wikipedia.org/wiki/Primary_producers

Primary producers also need energy to convert this same energy elsewhere, so they get it from nutrients. One type of nutrient is nitrogen. Importance of primary producers. Without primary producers, organisms that are capable of producing energy on their own, the Earth would be unable to sustain itself.

sciencing.com/primary-producers-8138961.html

Primary producers are consumed by primary consumers (generally herbivores), which are then consumed by secondary consumers and so on. Organisms at the top of the chain eventually die and are then consumed by decomposers, which fix the nitrogen levels and provide the organic material necessary for the next generation of primary producers.

www.reference.com/business-finance/examples-primary-consumers-1c20fa8aa24bd871

Primary consumers are animals that eat producers, and since producers are almost always green plants, primary consumers can most simply be defined as herbivores, such as cows and deer. "Consumer" and "producer," in this usage, refer to the production and consumption of energy in a form that can be used for life processes.

www.reference.com/science/primary-producers-e2dc6ea8f3807acc

Primary producers, also called autotrophs, are organisms that can produce their own food. Most autotrophs lie at the bottom of the food chain, serving as food sources for animals farther up the line.

biologydictionary.net/primary-consumer

Primary Consumer Definition. A primary consumer is an organism that feeds on primary producers.Organisms of this type make up the second trophic level and are consumed or predated by secondary consumers, tertiary consumers or apex predators.

www.quora.com/What-is-a-primary-producer-and-what-are-some-common-examples

Primary producers are organisms in an ecosystem that produce biomass from inorganic compounds. In a terrestrial ecosystem, mainly the green plants (photosynthetically active) are primary producers. Like, grass is the primary producer in a grazing...

en.wikipedia.org/wiki/Primary_production

Primary production is the production of chemical energy in organic compounds by living organisms. The main source of this energy is sunlight but a minute fraction of primary production is driven by lithotrophic organisms using the chemical energy of inorganic molecules.

sciencing.com/major-primary-producer-marine-ecosystem-4683.html

What Is the Major Primary Producer in the Marine Ecosystem? ... The major primary producers in most marine ecosystems are microscopic plankton, tiny green photosynthesizers floating in the ocean's sunlit upper layers. ... Diatoms are an especially important class of phytoplankton because they account for as much as 60 percent of primary ...

citadel.sjfc.edu/students/naa07113/e-port/producers.html

What is a producer? Plants are the first level in the food chain or food webs and are known as primary producers. They make all the food and energy that is found in an ecosystem. Without plants people or other animals could not survive because we would not have the food or energy that we need.

enchantedlearning.com/subjects/foodchain

Primary producers (organisms that make their own food from sunlight and/or chemical energy from deep sea vents) are the base of every food chain - these organisms are called autotrophs. Primary consumers are animals that eat primary producers; they are also called herbivores (plant-eaters).