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 …
What are the top 3 most productive ecosystems?
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 most productive and least productive ecosystems?
Globally, patterns of primary productivity vary both spatially and temporally. The least productive ecosystems are those limited by heat energy and water like the deserts and the polar tundra. The most productive ecosystems are systems with high temperatures, plenty of water and lots of available soil nitrogen.
Which of the following is least productive ecosystem desert?
Very low productivity is present in deserts and arctic regions. In oceans and other aquatic ecosystems, productivity is limited by light as it decreases with depth. But on a global basis, aquatic ecosystems occupy more space on earth than any other biome and have good productivity in surface layers, which are euphotic.
Which 3 ecosystems have the highest productivity and which 3 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.
Which of the following ecosystems is least productive?
In an ecosystem, the productivity is the rate of generation of biomass in the given ecosystem in a given time. The least productive ecosystems are deserts and deep lakes.
What are the most productive freshwater ecosystems?
Tonle Sap Lake – One of the World’s Most Productive Freshwater Ecosystems. Located in Central Cambodia, Tonle Sap Lake is the largest lake in Cambodia and is considered one of the world’s most productive freshwater ecosystems.
What is the most productive biome?
Tropical forests have the highest biodiversity and primary productivity of any of the terrestrial biomes.
What is the most productive ecological environment?
Wetlands and Nature
- Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs. …
- Wetlands play an integral role in the ecology of the watershed. …
- Wetlands’ microbes, plants and wildlife are part of global cycles for water, nitrogen and sulfur.
Are deserts the least productive ecosystem?
Least productive ecosystem is desert and deep lake.
Which ecosystem has lowest net primary productivity?
The biomes with the lowest levels of primary productivity include deserts, the tundra, the open ocean, and the lakes and streams biome.
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. The average productivity of an ocean ecosystem is about 50 grams of carbon per square meter per year.
Why do oceans have low NPP?
The average NPP of the ocean is so low because the ocean’s volume (mostly open space) in comparison to the amount of producers is massive.
What are the two most productive aquatic ecosystems?
List two of the most productive ecosystems or aquatic life zones and two of the least productive. The two most productive are estuaries, swamps and marshes, and tropical rain forests.
Why does the desert have such a low NPP?
With the amount of sunlight it receives, why is the NPP of a desert so low? There is not enough water for photosynthesis.