Why do some ecosystems have higher NPP than others?

Production forests are comparatively stable ecosystems, experiencing a longer growth cycle than food and energy crops. Food and energy crops are usually harvested at the end of a relatively short rapid growth phase, leading to a higher average NPP per unit area.

What makes an ecosystem have high NPP?

solar energy utilization

About 40 to 85 percent of gross primary productivity is not used during respiration and becomes 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 is productivity higher in some ecosystems?

Basically, the answer is that climate and nutrients control primary productivity. Areas that are warm and wet generally are more productive (see Figures 6a and 6b). Overall, the amount of water available limits land primary production on our world, in part due to the large areas of desert found on certain continents.

What ecosystems have the highest NPP?

Tropical rain forests have high NPP and the highest biodiversities of any terrestrial ecosystems. The physical environment favours vast photosynthetic output and high growth rate.

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What does a higher NPP mean?

NPP is the net energy available after respiration. The higher the net primary production, the more animals can be supported per unit area. In most natural ecosystems, high net primary production is generally accompanied by a highly diverse plant and animal community.

Why is NPP higher in tropical rainforests?

In Tropical Rainforests, water, sunlight, and high temperatures are consistent and a dense concentration of plants is present, causing both the GPP and NPP to be very high. So, high levels of productivity increase biomass.

What biomes have high NPP low NPP why quizlet?

Biomes with more vegetation have higher NPP levels (tropical rainforest has the most). Important because it can be an indicator for studying health of diff plants.

Why different ecosystems have different 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 accounts for the large difference in NPP among different ecosystems?

There is less available solar energy, heat and nutrients as you approach the poles. what accounts for the large difference in NPP among different ecosystems? … Different temperatures and biomass’s in ecosystems.

Why do rainforests and estuaries have such high NPP Why should they be protected?

Why do you think tropical rain forests and marshes have high NPP? Why should these areas be protected? There is a lot of water for photosynthesis production. Tropical rain forests and marshes help sustain life.

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Why does NPP increase over time?

the NPP will increase over time because plants undergo metabolic process which increase the # of cells and cell products which can be used as energy for the next trophic level.

Which of the following has the highest NPP?

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).

Why do swamps have high NPP?

Net primary production (NPP) is highest in wetlands receiving nutrient enrichment or with high nutrient turnover. The degree, duration, and periodicity of flooding affect wetland productivity more than rainfall or temperature. Drainage can promote enhanced productivity by increasing nutrient mineralization.