Quick Answer: Why Do Dissolved Nutrients Drop In The Spring?

What does algae get eaten by?

The young of many aquatic animals such as frogs, fish and aquatic (water-dwelling) insects eat algae as their main source of food.

Some adult fish and other creatures also eat algae.

Perhaps you have seen a type of catfish that that sucks the glass sides of aquariums?.

What is the most productive part of the ocean?

Although they occupy just fewer than two percent of the surface of the oceans, the large coastal upwelling areas on the eastern edges of the Pacific and the Atlantic are among the most biologically productive marine areas of all.

Why are cold oceans more productive?

Also, when surface waters are cold, it is easier for deeper water to rise to the surface, bringing nutrients to sunlit areas where phytoplankton can use them. … In many coastal areas, the rising slope of the sea floor pushes cold water from the lowest layers of the ocean to the surface.

Why are phytoplankton blooms bad?

These blooms occur when phytoplankton, which are tiny microscopic plants, grow quickly in large quantities while producing toxic or harmful effects on people, fish, shellfish, marine mammals, and birds. … Blooms can block light to organisms lower in the water column, or even clog or harm fish gills.

What is the main reason for low productivity of ocean?

The primary reason as to why productivity in oceans is lower is that – light – an essential factor in photosynthesis, is a limiting factor as far as its penetration depth in seas & oceans is concerned.

Which zone is lacking in nutrients?

euphotic zoneLow nutrient concentrations in the euphotic zone are due to biological uptake and often lead to severe nutrient limitation of phytoplankton during the periods of high water-column stability.

What animals eat phytoplankton?

Jellyfish, which are actually large plankton themselves, eat phytoplankton. The microalgae are also nourishment for krill and zooplankton. Fish then get sustenance from the organisms that have fed on the phytoplankton, including baleen whales, which strain the plankton out of the water and into their mouths.

Why is there greater productivity a few meters below the surface of the open ocean?

Because of the density difference between surface water and the deep sea across most of the ocean, ocean circulation can only very slowly reintroduce dissolved nutrients to the euphotic zone. By driving nutrients out of the sunlit, buoyant surface waters, ocean productivity effectively limits itself.

Does plankton eat algae?

Zooplankton occupy the centre of the open-water food web of most lakes. They eat bacteria and algae that form the base of the food web and, in turn, are heavily preyed upon by fish, insects and other zooplankton.

What causes phytoplankton to grow out of control?

Most phytoplankton are buoyant and float in the upper part of the ocean, where sunlight penetrates the water. … However, under certain environmental conditions, such as the introduction of too many nutrients from land based sources of pollution, phytoplankton may grow out of control and form blooms.

How beneficial is phytoplankton?

Photosynthesis by the phytoplankton accounts for up to half of global primary production. They also provide the primary food source for the zooplankton, and together form the base of the oceanic food chain. Larger and larger zooplankton, fish, and mammals depend on these plankton for their survival.

What happens to phytoplankton once they bloom?

After the bloom is over, the phytoplankton organisms die and undergo decomposition, a process that also removes DO from the water column. During some blooms, fish are seen gasping at the surface for oxygen and this lack of DO can be a direct cause of “fish kills” observed on the scene.

Does plankton eat plastic?

Of the 8.3 billion tons of plastic ever made, more than half winds up in the environment, especially the ocean. Their study found that bizarre, tiny creatures called giant larvaceans ingest and transport plastic from the ocean surface to the seafloor. …

What are 3 areas of upwelling in the world?

Worldwide, there are five major coastal currents associated with upwelling areas: the Canary Current (off Northwest Africa), the Benguela Current (off southern Africa), the California Current (off California and Oregon), the Humboldt Current (off Peru and Chile), and the Somali Current (off Somalia and Oman).

Which part of the ocean has the most nutrients?

You can see the highest abundance close to the coastlines where nutrients from the land are fed in by rivers. The other location where chlorophyll levels are high is in upwelling zones where nutrients are brought to the surface ocean from depth by the upwelling process.

What does phytoplankton get eaten by?

Phytoplankton and algae form the bases of aquatic food webs. They are eaten by primary consumers like zooplankton, small fish, and crustaceans. Primary consumers are in turn eaten by fish, small sharks, corals, and baleen whales.

What happens if there is too much phytoplankton?

When too many nutrients are available, phytoplankton may grow out of control and form harmful algal blooms (HABs). These blooms can produce extremely toxic compounds that have harmful effects on fish, shellfish, mammals, birds, and even people.

Why does the spring phytoplankton bloom start in the spring and die out in the early summer?

As spring turns to summer, nutrients in the surface layer are consumed by phytoplankton, reducing nutrient availability at the surface. As summer sets in, phytoplankton die and drift to the bottom, taking the nutrients they ingested with them. Surface waters are now left with few nutrients available.

Why do phytoplankton blooms occur in the spring?

Rapid increases in phytoplankton growth, that typically occur during the spring bloom, arise because phytoplankton can reproduce rapidly under optimal growth conditions (i.e., high nutrient levels, ideal light and temperature, and minimal losses from grazing and vertical mixing).

Why are tiny phytoplankton so important?

Phytoplankton are tiny photosynthetic organisms that are the major producers of marine life. They form the foundation of the food web for most marine life. They are responsible for half of the photosynthetic activity on earth, making them important to both their local and the global ecosystems.

Which area has the highest amount of primary productivity?

The highest net primary productivity in terrestrial environments occurs in swamps and marshes and tropical rainforests; the lowest occurs in deserts.