A group of researchers are assessing energy availability in a terrestrial ecosystem. Theimage shows the food web for this ecosystem. They set up three plots and assess thebiomass of producers, primary consumers, and secondary consumers. Rabbits andgrasshoppers feed on ground cover plants that grow on the forest floor. Plot 1 is composedof mature hardwood trees, and only 25% of the sunlight reaches the shrubs and grassescompared to plots 2 and 3, which have fewer trees and allow more sunlight to reach theforest floor.Mountain lionHawkSnake KInsect-Shreweating birdDeerRabbitSquirrelGrasshopperTreeFungusGrassShrubBased on the food web shown here, which of the following best describes how thereduction in sunlight to the forest floor would impact the number of primary consumers(squirrel, grasshopper, rabbit, and deer) in plot 1 compared to the other plots?Plot 1 will show an increase in deer only because they feed on trees.Plot 1 will showa decrease in squirrels and rabbits, while deer and grasshoppers willincrease.Plot 1 will show a decrease in rabbits and grasshoppers, while squirrels and deer willincrease.Plot 1 will show a decrease in all primary consumers because of the lack of sunlight reachingthe grass and shrubs. Scientists studied changes in proline, which is an indicator of plant stress and overallprotein content in the corn plant when leaves had been consumed by grasshoppers. Cornplants were exposed to varying numbers of grasshoppers and compared to control plantswith no grasshopper exposure.The bar graphs, with error bars, show the mean proline and protein content.401412301010Control (0)102040Control (0)102040HerbivoryHerbivoryWhich of the following statements best describes the likely outcome based on the growth ofcorn plants within this study in terms of the dependent variables shown?When there is an increase of the dependent variable, the number of grasshoppers, measuredagainst the independent variables, proline and protein, the corn plants would have slowergrowth and be smaller than the control plants.When there is a decrease in the dependent variable, the number of grasshoppers, measuredagainst the independent variable, proline and protein content, the growth of the cornplants would be similar to or greater than that of the control plants.When there is a decrease in the dependent variables, proline and protein content, measuredagainst the independent variable, the number of grasshoppers, the corn plants wouldhave slower growth and be smaller than the control plants.When there is a decrease in the dependent variable, protein content and proline content,measured against the independent variable, number of grasshoppers, the corn plantswould have similar or greater growth than control plants.ProteinProtein %

Food Web:- A food web is the network of interlinked food chains and represents what-eats-what in a…

A group of researchers are assessing energy availability in a terrestrial ecosystem. The image shows the food web for this ecosystem. They set up three plots and assess the biomass of producers, primary consumers, and secondary consumers. Rabbits and grasshoppers feed on ground cover plants that grow on the forest floor. Plot 1 is composed of mature hardwood trees, and only 25% of the sunlight reaches the shrubs and grasses compared to plots 2 and 3, which have fewer trees and allow more sunlight to reach the forest floor. Mountain lion Hawk Snake Insect Shrew eating bird Deer Rabbit Squirrel Grasshopper Tree Fungus Grass Shrub Based on the food web shown here, which of the following best describes how the reduction in sunlight to the forest floor would impact the number of primary consumers (squirrel, grasshopper, rabbit, and deer) in plot 1 compared to the other plots? Plot 1 will show an increase in deer only because they feed on trees. Plot 1 will show a decrease in squirrels and rabbits, while deer and grasshoppers will increase. Plot 1 will show a decrease in rabbits and grasshoppers, while squirrels and deer will increase. Plot 1 will show a decrease in all primary consumers because of the lack of sunlight reaching the grass and shrubs.

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