Best answer: Why do open oceans not support rich ecosystems and large numbers of fish?

Why do the open oceans not support rich ecosystems and large numbers of fish? They are called oligotrophic bodies of water, and are low in nutrients. Even with the abundant light, photosynthetic organisms have difficulty obtaining enough nutrients to grow.

Why do open oceans have such low net primary productivity NPP )?

Open ocean is low in productivity? 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.

Why do open oceans produce the largest share of Earth’s biomass?

Open oceans produce the largest share of Earth’s biomass because the net primary productivity (NPP) of the ocean is… … Both forest have the same gross primary productivity (GPP). Forest A has a net primary productivity of 1650 kcal/m^2/year, and forrest B has a net primary productivity of 1110 kcal/m^2/year.

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Why are continuously moving ecosystems unique?

Rivers and streams are unique among ecosystems as they are continuously flushed with a fresh supply of water from upstream. Organisms must either swim continuously against the current or attach themselves to the bottom or some other fixed object (Figure 1). Lakes and ponds are classified based on their nutrient levels.

Why are marine animals more diverse than terrestrial ones?

1,5 As water has high specific heat capacity, temperature fluctuations in the marine ecosystems are much lower (i.e. both diurnal and seasonal basis) than occur in terrestrial ecosystems of similar climates. … Gases are also more available in terrestrial ecosystems than in marine ecosystems.

Why do you think the open ocean is not a productive ecosystems?

The open ocean is not a productive ecosystem because most of the ocean does not receive sunlight. The productive places in the ocean are the places where plankton can carry out photosynthesis (near the surface) or the bottom, where benthic organisms can feed off the detritus.

Why does open ocean have low productivity?

In surface waters away from coastlines, generally there is plenty of sun but not enough nutrients. So most of the ocean surface is not very productive. The water is too deep for storms to stir up nutrients from the bottom and there isn’t upwelling.

Why is it that the open ocean provides the largest percentage of the Earth’s net primary production?

° The open ocean has a relatively low production per unit area but contributes more net primary production than any other single ecosystem because of its very large size. Overall, terrestrial ecosystems contribute two-thirds of global net primary production, and marine ecosystems contribute approximately one-third.

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How is it that the open ocean produces the highest net primary?

How is it that the open ocean produces the highest net primary productivity of Earth’s ecosystems, yet net primary productivity per square meter is relatively low? Oceans contain greater concentrations of nutrients compared to other ecosystems. Oceans receive a greater amount of solar energy per unit area.

Which regions of the ocean are likeliest to support highly productive ecosystems due to upwelling?

Upwelling is most common along the west coast of continents (eastern sides of ocean basins). In the Northern Hemisphere, upwelling occurs along west coasts (e.g., coasts of California, Northwest Africa) when winds blow from the north (causing Ekman transport of surface water away from the shore).

Why is a farm not an ecosystem?

The farm ecosystem is different from a forest or a meadow ecosystem because humans control many of the interactions among the things on the farm. List all the living and non-living things you think are a part of the farm ecosystem.

Why are aquatic systems not called biomes?

Aquatic systems are not called biomes, The major differences between the various aquatic zones are due to salinity, levels of dissolved nutrients; water temperature, depth of sunlight penet…

What makes the aquatic biome unique?

Estuaries: Where the Ocean Meets Fresh Water

Estuaries form a unique marine biome that occurs where a source of fresh water, such as a river, meets the ocean. Therefore, both fresh water and salt water are found in the same vicinity.