Yes, they are.
Aquatic producers are known as autotrophs. Autotrophs make their own food hence the why they are called producers. They are plants, so they generate their own energy/food out of sunlight + water + carbon dioxide.
Producers.
Are known as heterotrophic: or heterotrophs - as compared to autotrophs.
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xerophytes
Autotrophs are the producers in a food chain, such as plants on land or algae in water. An autotroph is an organism that can produce its own food using light, water, carbon dioxide, or other chemicals. Because autotrophs produce their own food, they are sometimes called producers.
Autotrophs are plants, and may be referred to as autophytes or producers.
Autotrophs are called the producers in an ecosystem because they are the first layer of energy. This is because they produce their own food using photosynthesis.
Some autotrophs/producers are: Wheat Fungi Algae Cacti Trees Shrubs They are made autotrophs because they can produce their own food.
Producers
producers
Autotrophs Producers