Which ecosystem produces the most biomass?
Which best describes how energy and nutrients work in an ecosystem?
Which best describes how energy and nutrients work in an ecosystem? … subtracting respiration from gross primary production (Gross primary production (production by autotrophs) minus the energy used in the process of cellular respiration (by autotrophs) equals the amount of energy available to a system.)
Which of the following best describes the role of Autotrophs in ecosystems?
Which of the following best describes the role of autotrophs in ecosystems? They produce their own organic molecules, which can be broken down for energy.
Which level has the most biomass?
Explanation: In general, the higher the trophic level (increasingly apex predators), the lower the biomass. Therefore, the lowest trophic level has the greatest biomass, and those are the producers. These include things like grass, trees, and flowers.
How is biomass created in an ecosystem?
The biomass in an ecosystem includes the mass of all living and dead organic matter. … Primary production refers to the production of organic matter, such as body tissue, produced mainly by photosynthetic plants. It is expressed as a rate of biomass production—for example, the amount of wood produced each year.
How does matter move through an ecosystem?
In ecosystems, matter and energy are transferred from one form to another. Matter refers to all of the living and nonliving things in that environment. Nutrients and living matter are passed from producers to consumers, then broken down by decomposers. Decomposers break down dead plant and animal matter.
Why is nitrogen limited in most ecosystems?
Although nitrogen is incredibly abundant in the air we breathe, it is often a limiting nutrient for the growth of living organisms. This is because the particular form of nitrogen found in air—nitrogen gas—cannot be assimilated by most organisms. … The ocean absorbs nitrogen gas from the atmosphere.
Which two factors can speed up the process of evaporation?
Factors That Affect the Rate of Evaporation
- temperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.
- exposed surface area of the liquid. …
- presence or absence of other substances in the liquid. …
- air movement. …
- concentration of the evaporating substance in the air.
Which of the following are examples of an ecosystem?
Examples of ecosystems are: agroecosystem, aquatic ecosystem, coral reef, desert, forest, human ecosystem, littoral zone, marine ecosystem, prairie, rainforest, savanna, steppe, taiga, tundra, urban ecosystem and others. plants, animals, soil organisms and climatic conditions.
Which organism is classified as a Heterotroph?
In the food chain, heterotrophs are primary, secondary and tertiary consumers, but not producers. Living organisms that are heterotrophic include all animals and fungi, some bacteria and protists, and many parasitic plants.
What is the ultimate source of almost all energy in an ecosystem?
Why does biomass decrease?
With less energy at higher trophic levels, there are usually fewer organisms as well. Organisms tend to be larger in size at higher trophic levels, but their smaller numbers result in less biomass. … The decrease in biomass from lower to higher levels is also represented by Figure above.
How is energy lost in a food chain?
Energy that is not used in an ecosystem is eventually lost as heat. Energy and nutrients are passed around through the food chain, when one organism eats another organism. … In each case, energy is passed on from one trophic level to the next trophic level and each time some energy is lost as heat into the environment.