1: Since species have evolved and do evolve, and since some species are also always becoming extinct, biological diversity is always changing, and which species are present in any one location can change over time. 2: Adaptation has no rigid rules; species adapt in response to environmental conditions, and complexity is a part of nature. We cannot expect threats to one species to necessarily be threats to another. 3: Species and populations do become geographically isolated from time to time, and undergo the flounder effect and genetic drift. 4: Species are always evolving and adapting to environmental change. One way they get into trouble – become endangered is when they do not evolve fast enough to keep up with the environment. – The Competitive Exclusion Principle 1: Explain how the introduction of the American Gray Squirrel into Great Britain demonstrates the Competitive Exclusion Principle. The introduction of the American Gray Squirrel was thought to be a great method to beautify Great Britain, but unfortunately, the native squirrel species, the British Red Squirrel, had the same habitat requirements. Both are under competition for resources, with the Red Squirrel outnumbering Gray Squirrels 2.5 mil to 140k. This outcome is an example of the Competitive Exclusion Principle, which states that two species with the same requirements cannot coexist in exactly the same habitat. Measuring Niches 1: What is an ecological niche? An ecological niche concept explains how so many species can coexist with one another. 2: What is the difference between a fundamental and realized niche? A fundamental niche is the condition in which an organism can thrive without conflict by other organisms, such as a certain temperature. A realized niche is the condition in which all organisms can thrive in together. Symbiosis 1: In ecology, symbiosis describes a relationship between two organisms that is beneficial to both- each partner in symbiosis is called a: symbiont. 2: What is an obligate symbiont? An obligate symbiont is a symbiont that benefits its host/partner for benefits in return. 3: Explain the symbiotic relationship between people and dogs. In a symbiotic relationship, dogs are raised and nourished by humans, and dogs provide companionship in return. Both benefit one another and are both obligate symbionts.
1: Since species have evolved and do evolve, and since some species are also always becoming extinct, biological diversity is always changing, and which species are present in any one location can change over time. 2: Adaptation has no rigid rules; species adapt in response to environmental conditions, and complexity is a part of nature. We cannot expect threats to one species to necessarily be threats to another. 3: Species and populations do become geographically isolated from time to time, and undergo the flounder effect and genetic drift. 4: Species are always evolving and adapting to environmental change. One way they get into trouble – become endangered – is when they do not evolve fast enough to keep up with the environment. The Competitive Exclusion Principle 1: Explain how the introduction of the American Gray Squirrel into Great Britain demonstrates the Competitive Exclusion Principle. The introduction of the American Gray Squirrel was thought to be a great method to beautify Great Britain, but unfortunately, the native squirrel species, the British Red Squirrel, had the same habitat requirements. Both are under competition for resources, with the Red Squirrel outnumbering Gray Squirrels 2.5 mil to 140k. This outcome is an example of the Competitive Exclusion Principle, which states that two species with the same requirements cannot coexist in exactly the same habitat. Measuring Niches 1: What is an ecological niche? An ecological niche concept explains how so many species can coexist with one another. 2: What is the difference between a fundamental and realized niche? A fundamental niche is the condition in which an organism can thrive without conflict by other organisms, such as a certain temperature. A realized niche is the condition in which all organisms can thrive in together. Symbiosis 1: In ecology, symbiosis describes a relationship between two organisms that is beneficial to both- each partner in symbiosis is called a: symbiont. 2: What is an obligate symbiont? An obligate symbiont is a symbiont that benefits its host/partner for benefits in return. 3: Explain the symbiotic relationship between people and dogs. In a symbiotic relationship, dogs are raised and nourished by humans, and dogs provide companionship in return. Both benefit one another and are both obligate symbionts.
360996755_chapter_8-guided_reading_.docx