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 is not most productive ecosystem?
Desert :- this ecosystem has very low availability of nutrients so this is the reason they have very low net primary productivity. So, it is not a stable ecosystem.
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 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. These biomes include habitats that have extreme temperatures and very limited precipitation, which results in very low production of new biomass.
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 is the least productive terrestrial ecosystems on Earth?
Desert and Tundra Biomes, limited by precipitation and temperature respectively, contain the least productive ecosystems.
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.
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.
What is the most productive ecosystem on the planet?
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.
What is the most productive aquatic biome?
Freshwater wetlands are submerged in water for part of or all of the year, but they are shallow enough to support emergent vegetation. Even though they look nasty, these freshwater wetlands are one of the most productive biomes.
What type of biome is most productive apex?
Tropical forests and swamps are the most productive terrestrial ecosystems. Reefs and estuaries are the most productive aquatic ecosystems.
Is temperate deciduous forest highly productive?
Although not to the level of their tropical counterparts, temperate deciduous forests typically display high plant biodiversity and rates of net primary productivity. They contrast sharply, however, with tropical forests in the distribution of biodiversity and productivity.
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.
Which of the following ecosystem can be included in least productive category?
The least productive ecosystems are deserts and deep lakes.
Why do deserts have low NPP?
Deserts are areas of low available water. In extreme desert, be it hot or cold, the absence of water will prevent most plants surviving and, hence, productivity is negligible. Plants may show similar adaptations to conserve water in both environments (xerophytism).