The highest net primary productivity in terrestrial environments occurs in
swamps and marshes and tropical rainforests
; the lowest occurs in deserts.
What parts of Earth have the highest rate of primary 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).
Where is primary productivity highest in the ocean?
Higher chlorophyll concentrations and in general higher productivity are observed on the equator, along the coasts (especially eastern margins), and in
the high latitude ocean
(Figure 4a and b).
Which ecosystem has highest gross primary productivity?
In the aquatic ecosystem,
coral reefs
show the highest gross primary productivity. Large numbers of aquatic phototrophs and phytoplankton contribute to the productivity of the ecosystem.
Which biomes has high net primary productivity?
Tropical forests
have the highest biodiversity and primary productivity of any of the terrestrial biomes. Net primary productivity ranges from 2–3 kg m
– 2
y
– 1
or higher.
What 3 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
.
How does temperature affect primary productivity?
The effect of temperature change is generally positive to
increase the productivity by enhancing the photosynthesis
as long as the temperature is in a range of optimum level. When temperature exceeds the optimum level, it will increase the rate of respiration causing the NPP continuously declined.
What are the four limiting factors of primary productivity?
dioxide, water, and mineral nutrients
. Lack of any one of these may limit photosynthesis or primary production.
What are the factors affecting primary 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.
How do you find primary productivity?
Net Primary Productivity (NPP), or the production of plant biomass, is equal to all of the carbon taken up by the vegetation through photosynthesis (called Gross Primary Production or GPP)
minus the carbon that is lost to respiration
.
Which ecosystem has highest?
In terrestrial ecosystems,
tropical rainforests
have the highest productivity.
What is the gross primary productivity?
Gross primary productivity is
the amount of carbon fixed during photosynthesis by all producers in the ecosystem
. However, a large part of the harnessed energy is used up by the metabolic processes of the producers (respiration).
Which ecosystem has the highest productivity?
In an ecosystem, primary productivity refers to the accumulation of energy in terms of biomass. In aquatic ecosystems, coral reefs have the highest productivity.
Tropical rainforests
show the highest productivity in terrestrial ecosystems.
Which 3 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).
What are the six biomes found on earth?
Some count six (
forest, grassland, freshwater, marine, desert, and tundra
), others eight (separating two types of forests and adding tropical savannah), and still others are more specific and count as many as 11 biomes.
Why do rainforests have high productivity?
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.
