Answer:
In an aquatic ecosystem, considering the abiotic factors, plants need "light", "temperature", "pression", "amount of oxygen and carbonic gas" and "solar radiation".
Step-by-step explanation:
In an aquatic ecosystem, plants need to take food to feed them, and it's
necessary to grow up and become strong and healthy. Plants need to get
this kind of foods by light, solar radiation, the minerals in the water and
ground. These sort of minerals are essentials for the plants. Oxygen and
Carbonic Gas are essentials for the plants to get and process all kind of
food and energy the plants need to take and get strong, healthy and ready
to survive few days, months or maybe years.