Concept explainers
To review:
The two food webs, in the forest and in the lake, the reason behind the high trophic efficiency in one of the above food webs, and to understand, which has the higher production efficiency, a crayfish or a bear on the basis of comparison between the species.
Introduction:
When one organism consumes another organism, which is consumed by other organisms as well, then a food web is formed. The food web occurs in all types of ecosystem. For example, in oceans, the large fishes eat the small fishes, which also get eaten by the octopus. In forests, the frog is eaten by the snake, which is eaten by birds, which further gets preyed upon by large animals. The trophic efficiency is measured as the energy available at one trophic level, divided by the energy available at the immediately below trophic level.
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Life: The Science of Biology
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- A pyramid of biomass shows the mass of all of the organisms in each trophic level of an ecosystem . Look at the biomass pyramid to the right . Based on the data shown , how many kilograms of plant matter would be needed to support the other trophic levels in this ecosystem ?arrow_forwardAvailability of energy is less for entities at higher trophic levels.Why?arrow_forwardConsidering the energy that is lost as heat to the environment when one organism consumes another, which model correctly shows the trophic levels ranked from greatest energy to least?arrow_forward
- Which statement best describe a trophic level? Question 2 options: A way to classify organisms based on their feeding behavior Organisms with dissimilar feeding behavior A diagram to sort organisms based on being meat or vegetable eating A triangular diagram organizing flora and faunaarrow_forwardHypothetical balanced food chain. The Sun and Earth supply 6 units of energy to each plant. For higher trophic levels, individuals consume 2 units of energy each before passing the remainder to the next trophic level. The number of individuals in each trophic level is given below. Complete the table below by computing the number of energy units in each columnarrow_forwardPLEASE ANSWER A AND B As we know, energy is lost moving from one trophic level to the next (total energy moved from one trophic level to the next is usually estimated at 10%). The total loss is known as trophic efficiency. Trophic efficiency is made of 3 parts (3 places where energy is lost). You need to pick TWO of the three individual efficiencies that make up the overall trophic efficiency and for EACH, tell me: a. What do we call this part of trophic efficiency? b. How is energy lost in this part of trophic efficiency? c. We discussed characteristics of an organism or environment that made it more or less efficient in certain parts of trophic efficiency (we did not use this one in class, but for instance, endoparasites have a higher xxxxxxx efficiency than ectoparasites). Tell me what characteristics of an organism/ecosystem (other than the example above) would make it more or less efficient for this part of Trophic efficiency. (Make sure to say what characteristics makes it…arrow_forward
- Hypothetical balanced food chain. Sun and Earth supply 6 units of energy to each plant. For higher tropic levels, individuals consume 2 units of energy each before passing the remainder to the next trophic level. The number of individuals in each trophic level is given below. Complete the table below by computing for the number of energy units in each column. Answer the following questions: Discuss how the food chain works. Where does each trophic component or level get its energy (food) from? What is the ultimate source of energy for all components of the food chain? Which component got the highest amount of available energy/individual? Why do members of this component need the most energy?arrow_forwardChoose a biological resource and address the following four questions using examples with that biological resource. a) Biomass production over time b) Carrying capacity and extinction threshold c) Management of the recruitment rate d) Describe two ways that climate change could impact the biological resource you selected for this question RESOURCE ECONOMICSarrow_forwardAt which point in the trophic pyramid is the greatest arount (not percentage) of energy lost? A) Between the primary producers and the primary consumers B) Between the primary consumers and the secondary consumers C)Between the secondary consumers and the tertiary consumers D) Between the secondary consumers and the primary producersarrow_forward
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