Which is the least productive terrestrial ecosystems on Earth?

Desert and Tundra Biomes, limited by precipitation and temperature respectively, contain the least productive ecosystems.

What are the 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 3 terrestrial ecosystems have the highest productivity?

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).

Which ecosystem is the most productive ecosystem on earth?

Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs. An immense variety of species of microbes, plants, insects, amphibians, reptiles, birds, fish and mammals can be part of a wetland ecosystem.

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Which ecosystem has the lowest net primary productivity?

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

Why are earth’s ecosystems least productive and why?

Some of the least productive ecosystems are: POLAR REGIONS: Polar regions and deserts are the least productive because both types of ecosystems experience little photosynthesis year-round. TUNDRAS: Not only are tundras cold in temperature, but they receive little for rainfall.

Are coral reefs least productive ecosystem?

In oceans, there are lots of nutrients but no sufficient sunlight is available in deep areas hence, oceans have least productivity. Grasslands are less productive ecosystem with annual productivity of 200-100gm/m2. Maximum productivity can be seen in coral reefs followed by estuaries.

Are all ecosystems equally productive?

When push comes to shove, all ecosystems have the same maximum rain-use efficiency, a measure of total plant growth per unit of precipitation. …

What is the most productive aquatic biome?

In marine waters the most productive systems are brown algal beds, seagrass beds and coral reefs. The kelps, brown algae of the genera Laminaria and Macrocystis, form dense forests in the sublittoral zone of rocky coasts in cool waters.

Is Deep Sea least productive ecosystem?

-Oceans contain lots of nutrients but they have no sufficient sunlight reaching in the deep areas, therefore, oceans have the least productivity among all ecosystems.

Which is the smallest ecosystem?

The Temperate Grassland is the smallest ecosystem in the world as well as on earth. The area of this grassland occupied by Tundra.

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Which of the following has the lowest mean net primary productivity?

The correct answer is Temperate grasslands. Temperate grasslands are characterized as having grasses as the dominant vegetation. Trees and large shrubs are absent, therefore it has the lowest mean net productivity in the category of grasslands.

Why does the open ocean have the lowest net primary productivity?

Marine ecosystems generally have low productivity. The surface of the ocean receives ample light for high rates of photosynthesis (only 5% of the incident light is reflected) and the dissolved CO2 levels are not usually limiting. In open ocean, any dead material sinks to the ocean depths.

What ecosystem has the lowest net primary productivity measured as kilocalories of energy produced per square meter per year?

So, the correct option is ‘Open Ocean’.