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 14PS
Summary Introduction
To explain: The type of interaction that takes place between all the five wildflower species that are enclosed with fences to keep out kangaroo rats, most common herbivores in the area.
Concept introduction: The intra-specific interaction is a type of interaction between species. Dominating species survive and progressively increase in this type of interaction. When the members of same or different species start living in a particular habitat; they show some effects on each other, due to limited
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Why have frequent small controlled-burn wildfires not helped to maintain chaparral ecosystems?
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Why have frequent small controlled-burn wildfires not helped to maintain chaparral ecosystems?
Seeds of chaparral shrubs need a large accumulation of leaf litter in order to sprout.
The heat from forest fires destroys the roots of chaparral plants.
Fire destroys the seeds of many types of chaparral shrubs.
Burnt ground encourages the growth of grasses, which compete with shrubs for nutrients.
The Jena experiment tested the effects of plant species richness on the ecosystem function of various grassland areas over a 15-year timespan. Ecosystem function was determined by measuring the biomass, soil characteristics, types, and numbers of producers and consumers in the area, and tested to determine the strength of the biodiversity effect on the ecosystem.
The graphs show the ecosystem function at the onset of the experiment (dotted line) versus the ecosystem function at the end of the 15-year experiment (solid line) in four different test sites (A, B, C, and D).
Which of the following rows correctly describes the biotic and abiotic factors that change during each type of succession?
Select one:
a.
Type of Succession
Abiotic Factors
Biotic Factors
Primary
Plant diversity will decrease.
Lava from volcano will harden to produce new land.
b.
Type of Succession
Abiotic Factors
Biotic Factors
Secondary
Soil is still present.
Plant diversity will increase.
c.
Type of Succession
Abiotic Factors
Biotic Factors
Secondary
Plant diversity will increase.
Soil is still present.
d.
Type of Succession
Abiotic Factors
Biotic Factors
Primary
Lava from volcano will harden to produce new land.
Plant diversity will decrease.
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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