Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 20, Problem 3SQ
Summary Introduction
Introduction:
The trophic structure of a community determines that how the flow of energy and matter is taking place as they are moving from photosynthetic organisms to herbivores and then to predators.
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Chapter 20 Solutions
Campbell Essential Biology with Physiology (6th Edition)
Ch. 20 - Prob. 1SQCh. 20 - According to the concept of competitive exclusion,...Ch. 20 - Prob. 3SQCh. 20 - Prob. 4SQCh. 20 - Why are the top predators in food chains most...Ch. 20 - Over a period of many years, grass grows on a sand...Ch. 20 - Prob. 7SQCh. 20 - Local conditions, such as heavy rainfall or the...Ch. 20 - Prob. 9SQCh. 20 - Prob. 10SQ
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- Disturbancescan alter a community’s stable environmental conditions, also called its:a.frequency.b.intensity.c.heterogeneity.d.equilibrium.e.niche space.arrow_forwardAt any point in time, a number of environmental objectives must be met with a limited amount of economic resources. This means that once an environmental problem is identified, they have to be prioritized. In general, this is done using scientific valuation of the relative risk to human health and the ecology of a given environmental hazard - a procedure known as: A. Biodiversity B. Public Goods C. Risk Assessment D. Profit maximizationarrow_forwardThe number of carnivores found at the top of an ecological pyramid is limited by thea. number of organisms above the top carnivores.b. number of trophic levels below the producers.c. biomass of the decomposers.d. amount of energy transferred to the top carnivores.arrow_forward
- Each species has a particular niche within a community. This niche is defined by which two sets of factors? a. Net primary productivity and physical environment b. Functional role and net primary productivity c. Net primary productivity and biological environment d. Physical environment and functional rolearrow_forwardThehighest level of ecological organization focuses on:a.the gene.b.the biosphere.c.warbler use of trees.d.forests.e.none of the choices applyarrow_forwardAkeystone species is one:a.that makes up a very large proportion of total community biomass.b.that feeds on a very large fraction of all available prey species.c.that is fed on by a very large fraction of all predators in itscommunity.d. whose feeding activities have adisproportionate effect on the structure of its community.e.that occupies the lowest level (the base) of the food web.arrow_forward
- In an inverted trophic pyramid, biomass is present in the secondary carnivores than in the primary producers. Compared to terrestrial systems, aquatic systems are likely to feature inverted pyramids. A. more; much more B. more; about as C. more; much less D. less; much more E. less; much lessarrow_forwardWhen substances are not broken down in metabolism but stored and passed on to higher trophic levels which of the following processes occurs? Group of answer choices a. Predation b. Coevolution c. Ecological Succession d. Biological Magnification e. Competitionarrow_forwardThe average niche breadth for space resources is wide for species of barnacles in an intertidal community. This pattern would indicate… a. niche overlap is low b. a greater level of competition between species c. coexistence via resource partitioning d. a greater number of species in the community e. high levels of disturbancearrow_forward
- A conceptual model representing the role, interaction, reaction, and density of essential ecosystem components is shown below. Examine the model and the relationships between the major players (i.e., predator, prey, producer). The structure's most important role is played by these major players. It's also worth noting that nutrition has been included in the model. This is the abiotic component that has a direct or indirect impact on the interaction. Question: Based on this scenario, what is the most significant role of sea otters in the marine community? Why it’s important?arrow_forwardThe process of certain elements through different trophic levels is also called A. food chain B. biodiversity C. biogeochemical cyclingarrow_forwardThe average niche breadth for space resources is narrow for a community of intertidal organisms. This pattern would indicate… a. a fewer number of species in the community b. niche overlap is high c. resource partitioning d. high levels of disturbance e. extinction via competitive exclusionarrow_forward
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