what happens to productivity as rainfall increases?

What Happens To Productivity As Rainfall Increases??

What happens to productivity as rainfall increases? As rainfall increases the rate of plant tissue production slowly decreases. … Since plants need sunlight in order to photosynthesize the amount they receive would definitely affect their productivity.

What factors other than rainfall might affect 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.

Which of the following is the best description of what happens to the amount of available oxygen as you get deeper in the ocean?

What happens to the amount of available oxygen as you get deeper in the ocean? You can see that oxygen is decreasing at a steady rate right up to 100 meters. Then, onward it starts significantly decreasing.

What is net primary productivity?

They show net primary productivity, which is how much carbon dioxide vegetation takes in during photosynthesis minus how much carbon dioxide the plants release during respiration (metabolizing sugars and starches for energy).

How does nutrients move through an ecosystem?

The nutrients are taken up by plants through their roots. The nutrients pass to primary consumers when they eat the plants. The nutrients pass to higher level consumers when they eat lower level consumers. When living things die, the cycle repeats.

What factors increase primary productivity?

A high primary productivity rate in the ecosystems is obtained when the physical factors (for instance: water, nutrients and climate) are favourable. The presence of some forms of secondary energy can also help to increase the primary productivity rate.

How does water limit primary productivity?

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. Water is primarily supplied through rain and the Earth’s weather system.

What effects did photosynthetic organisms have on the Earth’s atmosphere and other organisms?

Photosynthetic organisms dramatically increased atmospheric oxygen levels between 2 and 2.5 billion years ago. This change created selective pressure favoring organisms that used oxygen to produce energy-containing molecules.

How does oxygen concentration change with depth in the ocean?

Oxygen enters the ocean in the surface water through contact with the atmosphere. From there the oxygen is then brought to greater depths through the sinking and circulation of water masses. These, in turn, are dynamic processes that are strongly affected by climatic conditions. (Chapter 1).

Why does dissolved oxygen decrease with depth?

Gas saturation decreases by 10% per meter increase in depth due to hydrostatic pressure ¹². This means that if the concentration of dissolved oxygen is at 100% air saturation at the surface, it would only be at 70% air saturation three meters below the surface.

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Where is ocean productivity highest?

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).

How does productivity increase in aquatic ecosystems?

On land, it is driven by temperature and availability of water and nutrients modified by land use. In aquatic ecosystems, primary productivity is driven by the availability of nutrients and light and, to a lesser extent, by temperature and other factors.

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.

How does nutrient availability affect primary productivity?

-if ample sunlight and water are available, the primary productivity of an ecosystem may be limited by the availability of nutrients. … Every organism needs nutrients to build tissues ad carry out life functions. Like water, nutrients pass through organisms and the environment through biogeochemical cycles.

What 2 processes is water cycled from land to the atmosphere?

By what 2 processes is water cycled from land to the atmosphere? Chemical processes and physical processes are how water is cycled from land to the atmosphere. Describe 1 way in which water from the ocean may make 1 complete cycle through the atmosphere and back to the ocean. Ocean water evaporates into water vapor.

what happens to productivity as rainfall increases?
what happens to productivity as rainfall increases?

What will happen if the grasses are removed from an ecosystem?

The grass is the producer, so if it died the consumers that feed on it – rabbits, insects and slugs – would have no food. They would starve and die unless they could move to another habitat. All the other animals in the food web would die too, because their food supplies would have died out.

What two main factors determine ocean productivity?

Abiotic factors like solar radiation and nutrients, and biotic factors like zooplankton predation may affect ocean primary productivity. Productivity varies with the season, and also locally and globally.

What are the possible drivers of productivity in standing water?

Ocean temperature was identified as a likely driver of productivity, with reduced NPP and standing stock observed in warmer waters. Light availability was also strongly linked with carbon accumulation and storage, with increased light levels positively correlated with NPP and standing stock.

How does water velocity alter primary production?

After the construction of the dam, the suspended matter of the water body reduced in the upstream section and the transparency increased due to the decrease of water flow velocity, which slows down the attenuation of light intensity in the water and greatly improves the primary productivity.

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Why does the ocean have low productivity?

In ocean, sunlight is the main limiting factor which decreases the rate of photosynthesis. … Minerals and nutrients can also be a retarding factor based on location of the oceans.So, there will be less productivity than land which is 170 billion tons compared to 55 billion tons ion oceans.

What are the two main factors affecting primary production?

We focus on two major variables—light and nutrients—and their role in determining primary production.

What is the relationship between productivity and biodiversity?

The greater the number of species and number of interactions/complexity, the greater the biodiversity and ability of an ecosystem or habitat to survive and adapt to environmental pressures. Ecological productivity is a measure of the rate of generation of biomass or carbon per area of habitat or ecosystem.

How the increase in abundance of photosynthetic organisms changed the Earth’s atmosphere?

Oxygen and the Early Earth

It was not until the evolution of cyanobacteria (photosynthetic bacteria) that oxygen was released into the atmosphere. Over billions of years, photosynthesis led to an increase of oxygen in the atmosphere.

What effect did the increase in atmospheric oxygen by photosynthetic organisms have on Earth in terms of the biosphere?

These photosynthetic organisms were so plentiful that they changed the biosphere. Over a long period of time, the atmosphere developed a mix of oxygen and other gases that could sustain new forms of life. The addition of oxygen to the biosphere allowed more complex life-forms to evolve.

How did photosynthetic organisms affect the early atmosphere?

Two and a half billion years ago, single-celled organisms called cyanobacteria harnessed sunlight to split water molecules, producing energy to power their cells and releasing oxygen into an atmosphere that had previously had none.

Why is the water blue in the ocean?

The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. The ocean may also take on green, red, or other hues as light bounces off of floating sediments and particles in the water.

Is the ocean losing water?

What is the issue ? Globally, oceans have lost around 2% of dissolved oxygen since the 1950s and are expected to lose about 3–4% by the year 2100 under a business-as-usual scenario (Representative Concentration Pathway 8.5), though the scale of effect is predicted to vary regionally.

What is the relationship between CO2 production and ocean depth?

At a depth of 1000 m, liquid CO2 is about 6% less dense than seawater. Because liquid CO2 is more compress- ible than seawater, at a depth of 3000 m its density is similar to that of seawater. Thus liquid CO2 would be positively buoyant and rise if it were injected above 3000 m, but it would sink if injected deeper.

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Why is there less oxygen in ocean water near the equator than in water at higher latitudes?

Water molecules are made up of two hydrogen atoms and one oxygen atom. … Ocean waters rich in heavy oxygen: During ice ages, cooler temperatures extend toward the equator, so the water vapor containing heavy oxygen rains out of the atmosphere at even lower latitudes than it does under milder conditions.

How much oxygen is in the ocean water?

Major Gases
The percentage of gases in sea water is based on the total gases dissolved in sea water at equilibrium with air.
Oxygen O 2 20.95
Argon Ar 0.934
Carbon Dioxide CO 2 0.033

How does water temperature affect the amount of dissolved gases in water?

The solubility of oxygen and other gases will decrease as temperature increases 9. This means that colder lakes and streams can hold more dissolved oxygen than warmer waters. If water is too warm, it will not hold enough oxygen for aquatic organisms to survive.

What is the most productive marine environments and why are they so productive?

Upwelling. The most productive waters of the world are in regions of upwelling. Upwelling in coastal waters brings nutrients toward the surface. Phytoplankton reproduce rapidly in these conditions, and grazing zooplankton also multiply and provide abundant food supplies for nekton.

Why do coral reefs have high productivity?

Coral reefs’ high productivity has been attributed mainly to photosymbioses between the coral animal and algae of the family Symbiodiniaceae, with recognition that the host can increase algal photosynthesis by concentrating nutrients and enhancing the efficiency of light absorption.

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