1. Billy is stranded on an island. He has unlimited access to water, six chickens, and a few bagsof corn. He is considering his options for how to survive on the island until he is rescued. Draw amodel of the food web and the trophic pyramid on the island for each of these three options.Option A: Feed all the corn to the chickens and eat their eggs.Trophic PyramidFood WebOption B: Share the corn with the chickens. Eat their eggs, then eat the chickens when the cornruns out.Food WebTrophic PyramidOption C: Eat the chickens first, then eat the corn.Food WebTrophic Pyramid

A. Food web Corn->chicken->egg-> me tropical pyramid me egg chicken corn

Answered: 1. Billy is stranded on an island. He…

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter54: Ecosystems And Global Change

Section: Chapter Questions

Problem 1TYK

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What percent of the energy stored at one trophic level is stored at the next trophic level? О 10% О 30% 50% O 90%
In your own case study, describe and illustrate how changes in an organismal population can have unintended effects on trophic levels or ecosystems. Identify the organisms and nutrients that are present in your trophic pyramid. Describe the normal flow of your trophic cascade along with whether removal or introduction of the organism has a positive or negative effect on other organisms or nutrient levels within an ecosystem.
Answer this 3 basic questions about environmental science: 1. Name two organisms in your area that represent each of the trophic levels 3rd trophic level = 2nd tophic level = 1st trophic level = 2. List the variety of ways that species have developed to escape their predators (at least 4 ways). 3. Design a food web for humans. (it should be more than 10 species)
1. Why is that there are no more than 5 or 6 trophic levels in a community? 2. Why do we need to conserve or protect threatened or endangered species, and how does the loss of species affect communities? 3. Why are population sizes not constant?
The following is NOT true about trophic levels Animals capable of feeding at many trophic levels will be able to survive if portions of their food supply are decreased or eliminated Secondary consumers belong to the third trophic level Primary consumers belong to the first trophic level Each stage through which energy travels is called a trophic level
Unit 1: Fo x O Dashboard O What are EI Nino x O Copy of Exhibitio O Work on Exhibitic x QhcKKILgKyul.euV791u2MGONIk07CITIR21al/edit#slide-id.ged38e15Sa39 0 204 D Present- Tools Add-ons Help Last edit was 3 days ago D Background Layout- Theme Transition Trophic Cascades Part 2 - Interactive part 1 What does a solid line indicate? What does a broken line indicate? Add arrows, [+] and (-) to the diagram below. Otter Kelp Urchin ker notes
1. Kg is kilograms, a measure of mass. In this ecosystem, which trophic level has most mass? 2. Which trophic level is the original source of food? 4. Which trophic level consumes plants? 5. In this ecosystem, why would the wolf have more mass than the lion?
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
1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the introduction of the Nile perch (Leveque 1995). Calculate the mean food chain length, percent of trophic groups at various levels, and connectance for each food web. Oreochromis Insectivorous Fish Chironomids Chaoborous Man Piscivorous Fish Zooplanktivorous Haplochromines Rastrineobola Zooplankton Detritus/Phytoplankton Lake Victoria in the 1970s Detritivorous Phytoplanktivorous Haplochromines Figure 31.2. (a) Food web structure of Lake Victoria before introduction of the Nile Perch. [continued on next page) Molluscivorous Fish Molluscs
Organisms at the first trophic level ________. a. capture energy from a nonliving source b. are eaten by organisms at lower trophic levels c. are shown at the top of an energy pyramid d. are consumers
The loss of an apex consumer would impact which trophic level of a food web? primary producers primary consumers secondary consumers all of the above
Figure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.

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