Which of the following is primarily responsible for limiting the number of trophic levels in most ecosystems? Decomposers compete with higher-order consumers for nutrients and energy.
What factors affect trophic levels?
Trophic structure, the partitioning of biomass between different trophic levels, is affected by both bottom-up (energy and nutrient inputs into primary producers) and top-down (predator consumption suppresses lower trophic levels) factors.
What limits the production in ecosystem?
In terrestrial ecosystems, temperature and moisture are the key factors limiting primary production.
What is the minimum number of trophic levels an ecosystem must have to survive?
Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem. All food chains and webs have at least two or three trophic levels. Energy is passed up a food chain or web from lower to higher trophIC levels.
Which of the following is a reason that inefficient transfer of energy among trophic levels results in the typically high endangerment status of many top level predators?
How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top predators? Answers: Predators have short life spans and short reproductive periods.
What is the process that primarily affects animals at the highest trophic levels?
Higher trophic levels (hereafter consumers, including herbivores, carnivores, pests, etc.) are primarily affected indirectly by nitrogen deposition via nitrogen-induced changes in food quality or quantity (Throop and Lerdau, 2004).
Why does the number of organisms decrease at each level?
The position of an organism in a food chain, food web or pyramid is its trophic level. Energy is lost to the surroundings from one trophic level to the next. This is why there are fewer organisms at each trophic level in the example above.
What limits the growth of many producers in most ecosystems?
Limiting factors of an ecosystem include disease, severe climate and weather changes, predator-prey relationships, commercial development, environmental pollution and more.
How do limiting factors determine the carrying capacity of an ecosystem?
Limiting factors determine carrying capacity. The availability of abiotic factors (such as water, oxygen, and space) and biotic factors (such as food) dictates how many organisms can live in an ecosystem. … In an ecosystem, the population of a species will increase until reaches the carrying capacity.
What factors limit the amount of primary production?
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.
Which of the following is primarily responsible for limiting the number?
E) producer. A) primary consumer. To recycle nutrients, the minimum an ecosystem must have is A) producers. B) producers and decomposers.
Why are the number of trophic levels limited?
1 Answer. In a food chain, only 10% of the total amount of energy is passed on to the next trophic level from the previous trophic level. As we move higher up in the food chain the amount of energy diminishes to a level at which it cannot sustain any trophic level, thereby limiting the number of trophic levels.
Why does biomass decrease at each trophic level?
Biomass shrinks with each trophic level. That is because between 80% and 90% of an organism’s energy, or biomass, is lost as heat or waste. A predator consumes only the remaining biomass.
What is the primary limiting factor for aquatic primary production?
The availability of nutrients for primary producers has long been thought to be the main limiting factor for primary productivity in nutrient-poor lake ecosystems.
Which of the following best explains why there are typically five or less trophic levels in a food chain?
Which of the following best explains why there are seldom more than five trophic levels in a food chain? Energy is lost from each trophic level.
What is the limiting portion of the cycle for plants?
This store is about one million times larger than the total nitrogen contained in living organisms. Other major stores of nitrogen include organic matter in soil and the oceans. Despite its abundance in the atmosphere, nitrogen is often the most limiting nutrient for plant growth.