What are the two most important factors in determining the rate of primary productivity in an aquatic ecosystem?

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 2 factors influence primary productivity most?

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 are the major factors that determine the primary productivity of a specific ecosystem?

Production varies among ecosystems, as well as over time within ecosystems. Rates of production are determined by such factors as climate and nutrient supply. Precipitation is the dominant control worldwide, but nutrient availability often limits primary production in any particular, local system.

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What factors affect primary productivity in the ocean?

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 2 limiting factors for aquatic primary producers?

In aquatic ecosystems, light and nutrients limit primary production. Light is a key variable controlling primary production in oceans, since solar radiation can only penetrate to a certain depth known as the photic zone.

What are two key factors controlling primary productivity in lakes and oceans?

In aquatic ecosystems, primary productivity is driven by the availability of nutrients and light and, to a lesser extent, by temperature and other factors. Primary productivity is important because it is the process that forms the foundation of food webs in most ecosystems.

How do you determine primary productivity?

Primary productivity is usually determined by measuring the uptake of carbon dioxide or the output of oxygen. Production rates are usually expressed as grams of organic carbon per unit area per unit time.

What factors improve productivity?

A brief analysis of five major factors as a perspective to enhance productivity is discussed in the following sub-sections.

  • Positive attitude and involvement of management. …
  • Proactive employee. …
  • Good working condition. …
  • Tool and equipment to raise productivity. …
  • Availability of input supplies.

What does primary productivity depend?

Primary productivity depends upon plant species of the area, their photosynthetic capacity, availability of nutrients, soloar radiations, precipitiation, soil type and a number of other environmental factors.

What are two ways that primary producers produce high energy compounds?

Most organism obtain their energy in one of two ways. Plants, algae and some bacteria absorb light energy and convert it into chemical energy in carbon compounds. Because these organisms make their own food they are called producers. Chemical energy in carbon compounds flows through food chains by means of feeding.

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Which of the following factors limit primary productivity tropical waters?

Primary productivity in tropical oceans is limited by the amount of nutrients available.

What is the key to primary productivity in ocean water quizlet?

The main limiting productivity factor in tropical oceans is the availability of nutrients.

Why is primary productivity important to marine life?

Marine primary producers are important because they underpin almost all marine animal life by generating most of the oxygen and food that provide other organisms with the chemical energy they need to exist.

What are the two primary environmental factors that limit levels of photosynthesis in the ocean?

For photosynthetic organisms (like kelp or phytoplankton) are often limited by nutrients such as nitrogen or phosphorus. Organisms that eat other organisms are often limited by food availability or the abundance of predators that may eat them.

What are the two primary environmental factors that limit levels of photosynthesis in the surface of the ocean?

Ocean and/or wind currents. Climate. Geographical location.

What factors limit primary production in aquatic ecosystems such as lakes and streams?

What limits the net primary production in aquatic ecosystems such as lakes and streams? The amount of light energy converted to chemical energy by an ecosystem’s autotrophs in a given time period is an ecosystem’s primary production, limits the net primary production in aquatic ecosystems such as lakes and streams.