Which of these ecosystems has lowest net primary?

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

Which ecosystem has lowest net primary production?

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

Which marine zone has the lowest rate of primary productivity?

the marine zone with the lowest rate of photosynthesis would likely be the B) abyssal zone as this zone is furthest from the surface and therefore receives the least sunlight. Since sunlight is required for photosynthesis the abyssal zone has the least potential for primary productivity.

What contributes to the lowest net primary production?

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.

Which of the following ecosystem has the highest net primary productivity?

The tropical rainforest has highest annual net primary productivity (9000 K cal / m2 / yr).

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What three ecosystems have the lowest productivity?

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

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).

Which ecological unit is least related to abiotic factor?

Generally, the ecosystem is the lowest level of organization that is considered to include nonliving (abiotic) factors. So that would mean that ecosystems, biomes, and the biosphere include abiotic factors. The traditional levels of organization are as follows: Biosphere.

Which lake zone does not receive sunlight?

The aphotic zone (aphotic from Greek prefix ἀ- + φῶς “without light”) is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1 percent of sunlight penetrates.

What are the different zones of marine ecosystem?

WHAT ARE THE 5 MARINE ECOSYSTEMS?

  • Neritic Zone.
  • Oceanic Zone.
  • Supralittoral Zone.
  • Intertidal/Littoral Zone.
  • Sublittoral Zone.

Which is a limiting factor in net primary production for a plant ecosystem?

Lack of water is the main limit on primary production on the Earth’s surface. It has been found that in any area where there is an adequate water supply there will be a large amount of primary production.

What are limiting factors for primary production?

The availability of nutrients for primary producers has long been thought to be the main limiting factor for primary productivity in nutrient-poor lake ecosystems. However, recent studies have indicated that the availability of light energy is also important.

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What does a negative NPP mean?

Net primary production (NPP)

Values range from -1.0 grammes of carbon per square metre per day (tan) to 6.5 grammes per square metre per day (dark green). A negative value means decomposition or respiration overpowered carbon absorption; more carbon was released to the atmosphere than the plants took in.