What three things affect the growth of phytoplankton?

Question

I can't find the answer anywhere. Help please?

Answer 1

Like their land-based relatives, phytoplankton require sunlight, water, and nutrients for growth. Because sunlight is most abundant at and near the sea surface, phytoplankton remain at or near the surface. Also like terrestrial plants, phytoplankton contain the pigment chlorophyll, which gives them their greenish color. Chlorophyll is used by plants for photosynthesis, in which sunlight is used as an energy source to fuse water molecules and carbon dioxide into carbohydrates—plant food. Phytoplankton (and land plants) use carbohydrates as "building blocks" to grow; fish and humans consume plants to get these same carbohydrates.
The atmosphere is a rich source of carbon dioxide, as millions of tons of this gas settle into the ocean every year. However, phytoplankton still require other nutrients, such as iron, to survive. When surface waters are cold, deeper depths are allowed to upwell, bringing these essential nutrients toward the surface where the phytoplankton may use them. However, when surface waters are warm (as during an El Niño), they do not allow the colder, deeper currents to upwell and effectively block the flow of life-sustaining nutrients. As phytoplankton starve, so too do the fish and mammals that depend upon them for food. Even in ideal conditions an individual phytoplankton only lives for about a day or two. When it dies, it sinks to the bottom. Consequently, over geological time, the ocean has become the primary storage sink for atmospheric carbon dioxide. About 90 percent of the world's total carbon content has settled to the bottom of the ocean, primarily in the form of dead biomass.

Answer 2

Three things that affect the growth of phytoplankton include sunlight, water, and nutrients.

Answer 3

Food , light and temperature. (pollution, radiation, toxins, amount of CO2, O2, eaters of phytoplankton presence and activity, size of space to live, catastrophic accidents like volcano eruptions, virus plaques, overgrowth of population...)

Answer 4

They need light,water,food,and CO2. CO2 is to the plant as oxygen is to us. Not co as it is poisoners to both human and plants.

Answer 5

Light, temperature, and food supply.