It forms almost every ecosystem because they are the producers and pastures of them. Small organisms eat and big follow.
Phytoplankton
phytoplankton
phytoplankton
Plankton are the organisms that form the base of most open-ocean food webs.
everytime it want to have food
The sun and energy made by autotrophs (usually plants but also cyanobacteria and algae)
Spiders keep their webs as long as they are alive.
The study of algae is known as phycology. Phycologists investigate the biology, classification, ecology, and uses of algae in various ecosystems. Algae play a crucial role in aquatic food webs and the production of oxygen through photosynthesis.
In coastal ecosystems, food chains and webs are diverse and complex, typically including a variety of organisms such as algae, plankton, small fish, crustaceans, seabirds, seals, and larger fish. For example, a common food chain could start with algae being eaten by herbivorous zooplankton, which are then consumed by small fish, which in turn are preyed upon by larger fish or marine mammals. These interconnected relationships form intricate food webs that support the biodiversity of coastal ecosystems.
It depends where in the ocean. If its in the deep bottom where almost or no light reaches than the basis would be unicellular bacteria. if its at top it would be algae including seaweed and etc.
Food chains and food webs are different. This is because the webs have more relative food choices whereas the chains are limited.
Food webs and food chains are mostly the same