When hunting disrupts the balance in the food chain by removing all owls, there will be no predators on snakes, leading to their increase in numbers. Considering the scenario where the number of lost owls (4) is replaced by snakes, compute for energy units following in completing the table below. Trophic Levels No. Individuals in Each Trophic Level No. of Units Received from Trophic Level Above No. Units Used / Individual (Resp) No. Units Used in Trophic Level No. Units Remaining & Passed on to Next Trophic Level Mean No. Units Available per Individual in Trophic Level SUN +E = 6 1) Plants 30 2 2) Grasshopper 19 2 3) Frog 12 2 4) Snake 8 + 4 = 12 2 5) Owl 0 2

When hunting disrupts the balance in the food chain by removing all owls, there will be no predators on snakes, leading to their increase in numbers. Considering the scenario where the number of lost owls (4) is replaced by snakes, compute for energy units following in completing the table below. Trophic Levels No. Individuals in Each Trophic Level No. of Units Received from Trophic Level Above No. Units Used / Individual (Resp) No. Units Used in Trophic Level No. Units Remaining & Passed on to Next Trophic Level Mean No. Units Available per Individual in Trophic Level SUN +E = 6 1) Plants 30 2 2) Grasshopper 19 2 3) Frog 12 2 4) Snake 8 + 4 = 12 2 5) Owl 0 2

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter25: Human Impacts On The Biosphere

Section: Chapter Questions

Problem 1SQ

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As a general rule, for each jump up in trophic level, about how much does the available energy drop? Group of answer choices practically 100 percent 90 percent 10 percent 30 percent 50 percent
The Law of 10 determines all the following characteristics except one. Which one characteristic does the Law of 10 NOT determine? Group of answer choices The abundance of individuals at various trophic levels The amount of energy stored in the combined biomass of various trophic levels The combined mass of individuals at various trophic levels The length of food chains The number of species at various trophic levels
Which 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.
Use the following information to respond to the prompts below the data table. JUST ANSWER C AND D Trophic Level Net Production (kJ m-2yr-1) Respiration (kJ m-2yr-1) Top Carnivores 63 25 Carnivores 1321 280 Herbivores 6178 7900 Producers 36922 50060 a) Draw a pyramid of productivity for this data. (answered in photo) NO NEED FOR ANSWER b) Calculate GSP for each of the trophic levels indicated above. ANSWERED. NO NEED FOR ANSWER Producers: NSP=GSP- RESPIRATION GSP=NSP + RESPIRATION GSP=36922+50062 GSP= 86984 Herbivores: GSP=NSP + RESPIRATION GSP=6178+7900 GSP= 15078 Carnivores: GSP=NSP + RESPIRATION GSP=1321+280 GSP= 1601 Top carnivores: GSP=NSP + RESPIRATION GSP=63+25 GSP=88 c) Identify what information is unaccounted for in the data and outline how this is important to determining the productivity of a consumer. d) Explain why pyramids of productivity must always be upright and cannot be inverted
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. Trophic Levels No. Individuals in Each Trophic Level No. of Units Received from Trophic Level Above No. Units Used / Individual (Resp) No. Units Used in Trophic Level No. Units Remaining & Passed on to Next Trophic Level Mean No. Units Available per Individual in Trophic Level SUN +E = 6 1) Plants 30 180 2 2) Grasshopper 19 2 3) Frog 12 2 4) Snake 8 2 5) Owl 4 2
PLEASE 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…
What is another term used to describe: The second trophic level A herbivore A primary consumer A plant and animal eater The first trophic level
Which of the following statements about biotic potential is TRUE? Biotic potential of an organism is determined by how they interact with the environment. Increase in food supply increases the biotic potential of an organism. If an organism has higher rate of reproduction, it has higher biotic potential. Small organisms have low biotic potential because of their size.
If 1,000 Joules of energy are present in the primary consumer trophic level of a community, approximately how many Joules might be expected to be present in the primary producer trophic level? Group of answer choices Which of these answers is most likely depends on the particular community 10,000 Joules 100 Joules 1000 Joules
Assume the following strict trophic chain: mountain lions eat deer; deer eat black oak seedlings; lizards eat bugs, spiders eat bugs; bugs eat black oak seedlings. Which of the following statements is true? (choose one) A. The mountain lion is a tertiary consumer B. The deer is a secondary consumer C. The spiders are secondary consumers D. The lizards are primary consumers
The mass of living material at a trophic level at a particular time is called as what?
As a rule of thumb, about one-tenth of the energy or biomass consumed is stored at each trophic level. About how many kg of feed should it take to produce 1 kg of chicken meat that we eat? How much more energy should it take to provide you a meal of meat compared to vegetables?

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Trophic Levels	No. Individuals in Each Trophic Level	No. of Units Received from Trophic Level Above	No. Units Used / Individual (Resp)	No. Units Used in Trophic Level	No. Units Remaining & Passed on to Next Trophic Level	Mean No. Units Available per Individual in Trophic Level
SUN +E = 6
1) Plants	30		2
2) Grasshopper	19		2
3) Frog	12		2
4) Snake	8 + 4 = 12		2
5) Owl	0		2