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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Textbook Question
Chapter 20, Problem 6SQ
Over a period of many years, grass grows on a sand dune, then shrubs grow, and then eventually trees grow. This is an example of ecological ________.
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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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- when a natural disaster destroys a stable ecosystem the area is temporarily less stable than before. this is most likely due toarrow_forwardThe ability to resist damage from disturbances and to reviver quickly is known as what after ecosystem displays ecological stability after an environmental disturbancearrow_forwardWhy is economics important in the analysis of the environmental status/ ecological integrity?arrow_forward
- An ecosystem displays ecological stability if it can return to what after an environmental disturbancearrow_forwardBiologists can set up an ecosystem in a small, sealed aquarium that continues to function without maintenance for years. Describe the minimum biotic and abiotic components it must contain to remain balanced and stable.arrow_forwardWhich of the following is a component of an ecosystem but not of an ecological community? (a) a producer (b) water (c) a secondary consumer (d) a primary consumerarrow_forward
- What are the economic, environmental and/or biological implications of the following scenarios? Give specific examples. a. Absence of government agencies responsible for conservation and sustainabilityarrow_forwardWhich of the following is an "ecological" variable, that is, an exposure or an outcome that needs to be examined using ecological study designs? a. Percent of households in neighborhood which have incomes below federal poverty level b. Sensitivities of residents of a city to pollens in the environment c. Daily average alcohol consumption by adults living in a neighborhood d. Fast food consumption levels of heart disease patients admitted in a hospitalarrow_forwardFires, volcanic eruptions, climate change, and clear-cutting are changes in environmental conditions that lead toarrow_forward
- Development increases growth of cities and suburbs which can destroy habitats true or falsearrow_forwardA good way to define wilderness is to refer to it as___ A.a landscape not impacted by humans B.a landscape so diverse as to be nearly impenetrable C.an ecosystem in need of development D.an ecosystem in a state of dysfunctionarrow_forwardIf the ecological footprint per person of a country or theworld is larger than its biological capacity per person toreplenish its renewable resources and absorb the resulting waste products and pollution, the country or theworld is said to have an ecological deficit. If the reverse istrue, the country or the world has an ecological credit orreserve. See Figure 1.11 for a map of the world’s ecologicaldebtor and creditor countries. Use the data to the right tocalculate the ecological deficit or credit for the countrieslisted. (As an example, this value has been calculated andfilled in for the world.)1. Which three countries have the largest ecologicaldeficits? For each of these countries, why do youthink it has a deficit?2. Rank the countries with ecological credits in orderfrom highest to lowest credit. For each country, whydo you think it has an ecological credit?3. Rank all of the countries in order from the largest tothe smallest per capita ecological footprint.arrow_forward
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