Quick Answer: Which Two Marine Ecosystems Are The Most Productive?

What 3 ecosystems have the lowest productivity?

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

What happens to matter in an ecosystem?

In ecosystems, matter and energy are transferred from one form to another. Matter refers to all of the living and nonliving things in that environment. Nutrients and living matter are passed from producers to consumers, then broken down by decomposers. Decomposers break down dead plant and animal matter.

What is true of matter in ecosystems?

A. The primary productivity of an ecosystem does not depend on the availability of nutrients. Matter flows in a one-way direction with a 10% loss at each move up in trophic level. …

Which is the least productive aquatic ecosystem from the following list?

Environmental Chapter 7 TestABPlankton forms what part of the food chain?baseWhat is the least productive marine ecosystem?open oceanWhat fresh water and salt water mix in estuaries it forms what?nutrient trapThis lake has a large amount of plant growth due to nutrients.eutrophic lake49 more rows

How can primary productivity be improved?

A high primary productivity rate in the ecosystems is obtained when the physical factors (for instance: water, nutrients and climate) are favourable. The presence of some forms of secondary energy can also help to increase the primary productivity rate.

Which ecosystems are most productive?

The world’s ecosystems vary tremendously in productivity, as illustrated in the following figures. In terms of NPP per unit area, the most productive systems are estuaries, swamps and marshes, tropical rain forests, and temperate rain forests (see Figure 4).

What are the two most productive land ecosystems?

The two most productive are estuaries, swamps and marshes, and tropical rain forests. The two least productive are open ocean, tundra, and desert. About what percentage of total potential net primary productivity of the entire earth and the earth’s terrestrial ecosystems are used, wasted, or destroyed by humans?

Which marine ecosystem has the fewest available nutrients and the lowest productivity?

open ocean ecosystemsThe open ocean ecosystems have the least available nutrients and lowest productivity. The limiting factors in an marine habitat are light and nutrients.

Which is the smallest ecosystem?

The smallest land areas are occupied by tundra and temperate grassland ecosystems, and the largest land area is occupied by tropical forest. The most productive ecosystems are temperate and tropical forests, and the least productive are deserts and tundras.

Why land is called an ecosystem?

A land, or terrestrial, ecosystem is all the living organisms and their physical environment on a particular piece of land. Terrestrial ecosystems may interact and overlap with marine (salt-water) and limnological (fresh-water) ecosystems. A number of terrestrial biomes can be used to classify smaller ecosystems.

What increases net primary productivity?

Net primary productivity varies among ecosystems and depends on many factors. These include solar energy input, temperature and moisture levels, carbon dioxide levels, nutrient availability, and community interactions (e.g., grazing by herbivores) 2.

What is the least productive biome?

The biomes with the lowest levels of primary productivity include deserts, the tundra, the open ocean, and the lakes and streams biome.

How is the majority of energy within an ecosystem lost?

Energy that is not used in an ecosystem is eventually lost as heat. Energy and nutrients are passed around through the food chain, when one organism eats another organism. Any energy remaining in a dead organism is consumed by decomposers.

Which is not a freshwater ecosystem?

Wetlands. … Wetlands are not considered freshwater ecosystems as there are some, such as salt marshes, that have high salt concentrations — these support different species of animals, such as shrimp, shellfish, and various grasses.

What are the 3 most productive and 3 least productive ecosystems?

Deserts, tundra, and the deep ocean are the least productive ecosystems, typically having an energy fixation of less than 0.5 × 103 kilocalories per square meter per year (thousands of kcal/m2/yr; it takes one calorie to raise the temperature of one gram of water by 34°F [1°C] under standard conditions, and there are …

Which marine ecosystem contains the fewest producers?

open oceanThe open ocean is the marine ecosystem that contains the fewest producers.

What are the 4 types of ecosystem?

The four ecosystem types are classifications known as artificial, terrestrial, lentic and lotic. Ecosystems are parts of biomes, which are climatic systems of life and organisms.

How do humans affect net primary productivity?

Human activities such as land use affect the magnitude of global NPP and the flow of biomass through ecosystems, among others through changes in land cover. … Of this amount, 53% came from harvests, 40% from land-use-induced productivity changes, and 7% from human-induced fires.