The Law of 10% in trophic levels states O Only 10% of the energy in a trophic level is transferred to the next tropic level by consumption O Only 10% of the prey are eaten by a top predator O 10% of the energy is lost between one trophic level to the next 10% of the energy in an ecosystem is heat energy

The Law of 10% in trophic levels states O Only 10% of the energy in a trophic level is transferred to the next tropic level by consumption O Only 10% of the prey are eaten by a top predator O 10% of the energy is lost between one trophic level to the next 10% of the energy in an ecosystem is heat energy

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter42: Ecosystems

Section: Chapter Questions

Problem 3SA: Organisms at the first trophic level ________. a. capture energy from a nonliving source b. are...

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ctional What proportion of energy stored at one trophic level ends up being LOST as it moves to the next trophic level? O 10% O 25% O 50% O 75% O 90%
BEARS HAWKS OWLS FROGS SQUIRRELS BEETLES MICE PLANTS Based on these feeding relationships, which organism will receive the least amount of energy available in the ecosystem? O bears O plants O beetles O frogs
What percent of the energy stored at one trophic level is stored at the next trophic level? О 10% О 30% 50% O 90%
Why are food chains relatively short? O Not enough energy is transferred from one trophic level to the next to support a longer chain. O There are not enough species of carnivores to make the food chain longer. O Longer food chains require more land that is found in today's fragmented habitats. There aren't enough different plant species to support enough herbivore species to support the number of carnivore species needed for longer food chains.
In terrestrial ecosystems, the energy and biomass pyramids are the same in that they store the most at the bottom trophic levels (with primary producers). However, in aquatic ecosystems, the pyramids are inverted. Why is this? O None of these answers is correct. O Aquatic ecosystems have fewer plants and other autotrophs Aquatic ecosystems have more keystone predators Aquatic ecosystems have fewer decomposers Aquatic ecosystems have more types of filter feeders
Primary producers Tertiary consumers Secondary consumers Primary consumers and decomposers Which of the following statements is true for different trophic levels in ecosystems? Between 80% and 90% of the energy is lost between most trophic levels. Primary consumers consume less biomass than secondary consumers. Productivity increases with each trophic level. Between 10% and 20% of the energy is lost between most trophic levels. Production of biomass (g/m2/year) 3 30 200 1000
The trophic pyramid has very few large predators at the top and increasing numbers of creatures as you go to lower levels of the food chain. Why is that? If there are lots of prey animals in a system why aren’t there just as many predators?
The overexploitation of cod in the North Atlantic releases crab and shrimp from predation pressure and results in a boom in the number of crab and shrimp. The increased number of crab and shrimp cause a decline in zooplankton abundance, which subsequently causes an increase in phytoplankton abundance. This change in the food web is an example of which of these? top-down control bottom-up control O behavioral cascade O trophic ricochet O donor-control
Which of the following is true of trophic relationships in an ecosystem? All energy in the food chain is ultimately transferred to top level carnivores Most of the useable energy transferred between trophic levels is maintained--very little is lost The trophic pyramid predicts that top level carnivores should have the least amount of biomass in an ecosystem Net productivity is typically a measure of over-all photosynthesis in an ecosystem
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?
The trophic pyramid has very few large predators at the top and increasing numbers of creatures as you go to lower levels of the food chain. Why is that? If there are lots of prey animals in a system why aren’t there just as many predators? what is the difference between bottom up control and bottom down control?
Which trophic group keeps “leaky” carbon cycling through an ecosystema. primary producersb. detritovoresc. primary consumersd. predators40