The type of species interaction that appears to have caused aphid population to fluctuate in size in the Figure 1, and the type of species interaction that keeps the population size from fluctuating. Given: The fluctuation in population of Aphis glycines (soybean aphids) is more when its predator, Orius insidiosus (insidious flower bug), is excluded from environment. When the predator is present then fluctuation in aphids’ population is less. This information is represented in the following Graph 1: Graph 1: Fluctuations in population of Aphids and their predators. Introduction: Population of some organisms differs over time and some show very fast life cycle. In population that has very fast life cycle, fluctuation in its population occur within a few minutes or days. The highly fluctuating species responds to changes that occur in their resources . The limited food resources due to overcrowding may be vital cause of population fluctuation in such species. The population of a particular species can be controlled by the presence of their predators.

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Chapter 54.1, Problem 2R

Summary Introduction

To review:

The type of species interaction that appears to have caused aphid population to fluctuate in size in the Figure 1, and the type of species interaction that keeps the population size from fluctuating.

Given:

The fluctuation in population of Aphis glycines (soybean aphids) is more when its predator, Orius insidiosus (insidious flower bug), is excluded from environment. When the predator is present then fluctuation in aphids’ population is less. This information is represented in the following Graph 1:

Graph 1: Fluctuations in population of Aphids and their predators.

Introduction:

Population of some organisms differs over time and some show very fast life cycle. In population that has very fast life cycle, fluctuation in its population occur within a few minutes or days. The highly fluctuating species responds to changes that occur in their resources. The limited food resources due to overcrowding may be vital cause of population fluctuation in such species. The population of a particular species can be controlled by the presence of their predators.

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