Concept explainers
To review:
The lakes, in which one has three trophic levels and the other has four trophic levels, also to understand which one has the higher net production rate with reason, and the effect of omnivore on the net primary production (NPP), when added to the top of the food web with four trophic levels.
Introduction:
The trophic levels in the food web describe the position of the organism with respect to the energy gained by the organism. For example, the herbivores obtain one-tenth of the energy assimilated by the plants and the carnivores obtain one-tenth of the energy assimilated by the herbivores. Hence, the plants are considered as primary producers, and they occupy first trophic level. The herbivores mainly occupy the second trophic level and the lions occupy the third trophic level. The NPP is measured in terms of the carbon available by plants after respiration.
Want to see the full answer?
Check out a sample textbook solutionChapter 57 Solutions
Life: The Science of Biology
- A black bear normally eats many different types of food. When the black bear eats berries, what trophic level is the bear?arrow_forwardDescribe how energy flows through a hypothetical food chain from the bottom to the top. What happens to the numbers of individuals in each level as you move up the chain? In order to turn your food chain into a food web, what might you change about the trophic habits of its members?arrow_forwardWhich trophic level in an aquatic ecosystem would contain the greatest amount of usable energy? Primary consumers located 150 meters below sea level. Primary producers located 80 meters below sea level. Primary producers located 45 meters below sea level. Primary consumers located 40 meters below sea level.arrow_forward
- You will be examining the relationship among organisms inhabiting a small lake. Examine the “Lake Inhabitants” sheet for information about the organisms found in the lake. What biotic and abiotic factors will affect the aquatic plants in the lake? What biotic and abiotic factors will affect the bluegill in the lake? Looking at the organisms associated with the lake, organize them into three trophic groups: producers, consumers, and decomposers. Separate the consumers into three subcategories: herbivores, carnivores, and omnivores. Create 3 different food chains found within the lake. Food chain #1 should contain 3 organisms, food chain #2 should contain 4 organisms, and food chain # 3 should contain 5 organisms. The arrows should point in the direction the energy is flowing through the food chain. You can either use the “>” as your arrow or the Insert Symbol function to insert an arrow into your food chains. As the energy flows through each trophic…arrow_forwarda) Each trophic level, on average, will move 10% of the energy tied up in molecules to the next trophic level. How much of the energy from the sun is actually brought in to the first trophic level? b) When the producers convert energy and tie it up in the first trophic level, it is brought in as heat. True or false? c) Which of the following are true about ecosystems? Check all that apply. They contain both living and nonliving components.They contain both living and nonliving components. There is a transfer of energy through the system and some energy is lost as heat energy.There is a transfer of energy through the system and some energy is lost as heat energy. Nutrients repeatedly cycle through the ecosystem.Nutrients repeatedly cycle through the ecosystem. They represent the lowest level of biological organization.They represent the lowest level of biological organization. The ultimate source of energy for most ecosystems is organic molecules.arrow_forwardWhy do most food chains not go beyond the 4th or 5th trophic level?arrow_forward
- Earth has a total of 11.9 billion gha of productive land. How many people could Earth supportsustainably if the average ecological footprint were 8 gha per person (as in the United States)?arrow_forwardIn some cases, animals reach their biotic potential (if for a short period of time) and wreak havoc on the environment. What is biotic potential and why would reaching it create problems for the environment?arrow_forwardAvailability of energy is less for entities at higher trophic levels.Why?arrow_forward
- Trophic levels Part A) In food chains and webs, what trophic level must you have more of than others. Part B) Each trophic level has how much LESS energy? Part C) Can an organism fill more than one trophic level? Explain your answer.arrow_forwardWhich trophic level is vital to the continuation of the carbon cycle? Group of answer choices a. tertiary consumer b. secondary consumer c. producer d. primary consumerarrow_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