Distinguish between tolerance range and optimal range.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
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Distinguish between tolerance range and optimal range.

What determines the size of a population and where a particular species on
and does live? The answer to this is important if we are to live sustainably
flourish. Other conditions may lead to a species' decline or even extinctine
in our environment. Ideal biotic and abiotic conditions allow a species to
population. Limiting factors may be biotic, such as the availability of food
Biotic and Abiotic Influences
on Ecosystems
a
Both abiotic and biotic factors determine where a species can live
limiting factor is any factor that places an uPper limit on the size of a
or abiotic, such as access to water. Human influences often act as
factors,
limiting
Influence of Abiotic Factors
Abiotic factors such as temperature, light, and soil can influence a speciel
ability to survive. Every species is able to survive within a range of cachef
these factors. This range is called the species tolerance range (Figure 1i
Near the upper and lower limits of the tolerance
experience stress. This will reduce their health and their rate of growth ane
reproduction. Within a species' tolerance range is an optimal range, withis
which the species is best adapted. The largest and healthiest populations
of a species will occur when conditons are within the optimal range. Each
species has a tolerance range for every abiotic factor.
range.
individuals
tolerance ae
tigh
peulation
low
population population
population populahon
low
Abictic factor
high
Figure 1 Species can be successful over a range of abiotic conditions, However, they will be
stressed and will die out if oonditions excoed their tolerance limits.
Some species have wide tolerance ranges, while others have much
narrower ranges. Species with broad tolerance ranges will tend to
be
widely distributed and may easily invade other ecosystems, For exampe
buckthorn, a small tree native to Europe, has become widespread
over
much of southern and central Ontario due to its broad tolerance range.
Conversely, the showy lady's-slipper orchid has a narrow tolerance rang
It is found only in specific types of wetlands.
Population size
Transcribed Image Text:What determines the size of a population and where a particular species on and does live? The answer to this is important if we are to live sustainably flourish. Other conditions may lead to a species' decline or even extinctine in our environment. Ideal biotic and abiotic conditions allow a species to population. Limiting factors may be biotic, such as the availability of food Biotic and Abiotic Influences on Ecosystems a Both abiotic and biotic factors determine where a species can live limiting factor is any factor that places an uPper limit on the size of a or abiotic, such as access to water. Human influences often act as factors, limiting Influence of Abiotic Factors Abiotic factors such as temperature, light, and soil can influence a speciel ability to survive. Every species is able to survive within a range of cachef these factors. This range is called the species tolerance range (Figure 1i Near the upper and lower limits of the tolerance experience stress. This will reduce their health and their rate of growth ane reproduction. Within a species' tolerance range is an optimal range, withis which the species is best adapted. The largest and healthiest populations of a species will occur when conditons are within the optimal range. Each species has a tolerance range for every abiotic factor. range. individuals tolerance ae tigh peulation low population population population populahon low Abictic factor high Figure 1 Species can be successful over a range of abiotic conditions, However, they will be stressed and will die out if oonditions excoed their tolerance limits. Some species have wide tolerance ranges, while others have much narrower ranges. Species with broad tolerance ranges will tend to be widely distributed and may easily invade other ecosystems, For exampe buckthorn, a small tree native to Europe, has become widespread over much of southern and central Ontario due to its broad tolerance range. Conversely, the showy lady's-slipper orchid has a narrow tolerance rang It is found only in specific types of wetlands. Population size
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