Chapter 5 Review
... 17) What sorts of conditions would lead to a population having exponential growth? A population can have exponential growth if it has no limit to its resources and no competition or predation. Usually this would happen at the beginning of a population arriving in a new location with abundant resour ...
... 17) What sorts of conditions would lead to a population having exponential growth? A population can have exponential growth if it has no limit to its resources and no competition or predation. Usually this would happen at the beginning of a population arriving in a new location with abundant resour ...
Ecology and Conservation
... many different ways of existing in an ecosystem. The mode of existence of a species in an ecosystem is its ecological niche, which includes: ...
... many different ways of existing in an ecosystem. The mode of existence of a species in an ecosystem is its ecological niche, which includes: ...
Ch.5 Populations - Jefferson Forest High School
... Exponential growth doesn’t continue in natural populations for very long If a new species of organism is introduced into a new environment, at first the population grows slowly, then exponentially, eventually the population growth slows down As resources become less available, the growth of a popula ...
... Exponential growth doesn’t continue in natural populations for very long If a new species of organism is introduced into a new environment, at first the population grows slowly, then exponentially, eventually the population growth slows down As resources become less available, the growth of a popula ...
Population Dynamics - juan
... small number of individuals to a larger number of individuals that are ultimately limited by the environment • The logistic equation takes into account the carrying capacity of the environment: dN/dt = rN [(K − N)/K] • The element [(K − N)/K] reflects decline in growth as population size approaches ...
... small number of individuals to a larger number of individuals that are ultimately limited by the environment • The logistic equation takes into account the carrying capacity of the environment: dN/dt = rN [(K − N)/K] • The element [(K − N)/K] reflects decline in growth as population size approaches ...
Understanding Our Environment
... In the summer of 1980, much of southern New England was struck by an infestation of the gypsy moth (Porthetria dispar). As the summer wore on, the larvae (caterpillars) pupated; the hatched adults mated, and the females laid masses of eggs (each mass containing several hundred eggs) on virtually eve ...
... In the summer of 1980, much of southern New England was struck by an infestation of the gypsy moth (Porthetria dispar). As the summer wore on, the larvae (caterpillars) pupated; the hatched adults mated, and the females laid masses of eggs (each mass containing several hundred eggs) on virtually eve ...
PPT - FishBase
... M is Death Rate in Unfished Population In an unfished, stable population – The number of spawners dying per year must equal the number of ‘new’ spawners per year – Every spawner, when it dies, is replaced by one new spawner, the life-time reproductive rate is 1/1 = 1 – If the average duration of re ...
... M is Death Rate in Unfished Population In an unfished, stable population – The number of spawners dying per year must equal the number of ‘new’ spawners per year – Every spawner, when it dies, is replaced by one new spawner, the life-time reproductive rate is 1/1 = 1 – If the average duration of re ...
ICS Final Exam Study Guide
... Descent with modification- principle that each living species has descended, with change, from other species over time. Common descent- principle that living things were derived from common ancestors. Homologous structures- structures that have different mature forms but develop from the same embryo ...
... Descent with modification- principle that each living species has descended, with change, from other species over time. Common descent- principle that living things were derived from common ancestors. Homologous structures- structures that have different mature forms but develop from the same embryo ...
Lecture 15
... Physical factors not as important/limiting as in temperate areas Competition leads to species diversification ...
... Physical factors not as important/limiting as in temperate areas Competition leads to species diversification ...
Fundamental Models in Population Biology – Cribs
... - One population will exclude the other dependent on initial population sizes. - Both populations reach a stable coexistence. Coexistence only exists when both populations have a greater intraspecific inhibitory effect than interspecific effect; that is, they compete more with themselves than with t ...
... - One population will exclude the other dependent on initial population sizes. - Both populations reach a stable coexistence. Coexistence only exists when both populations have a greater intraspecific inhibitory effect than interspecific effect; that is, they compete more with themselves than with t ...
Midterm Review
... important and dominant species, and we can and should manage the earth mostly for our own benefit. Other species and parts of nature are seen as having only instrumental value based on how useful they are to us. stewardship worldview Another largely human-centered environmental worldview is the stew ...
... important and dominant species, and we can and should manage the earth mostly for our own benefit. Other species and parts of nature are seen as having only instrumental value based on how useful they are to us. stewardship worldview Another largely human-centered environmental worldview is the stew ...
Vanni et al 2009 - units.miamioh.edu
... When competing, individuals use limiting resources that would otherwise be available for other individuals. Consequently, competing individuals obtain resources at lower rates, and are likely to grow more slowly, have fewer offspring, and have a lower chance of surviving than they would in absence o ...
... When competing, individuals use limiting resources that would otherwise be available for other individuals. Consequently, competing individuals obtain resources at lower rates, and are likely to grow more slowly, have fewer offspring, and have a lower chance of surviving than they would in absence o ...
CHAPTER 23 ECOLOGY OF POPULATIONS
... the postreproductive group being smallest due to mortality; this is characteristic of stable populations. 5. An urn-shaped diagram indicates the postreproductive group is largest and the prereproductive group is smallest, a result of the birthrate falling below the death rate; this is characteristic ...
... the postreproductive group being smallest due to mortality; this is characteristic of stable populations. 5. An urn-shaped diagram indicates the postreproductive group is largest and the prereproductive group is smallest, a result of the birthrate falling below the death rate; this is characteristic ...
Local Frequency Denpendence and Global
... become unstable. From (3), we see that J<&1 when 15p 1 +10p 2 >23 (requiring both p 1 and p 2 to be quite close to 1). This corresponds to a ``flip'' bifurcation. The equilibrium attracts points that are far away, but is not stable, leading to cycles of period 2. As p 1 and p 2 increase even further ...
... become unstable. From (3), we see that J<&1 when 15p 1 +10p 2 >23 (requiring both p 1 and p 2 to be quite close to 1). This corresponds to a ``flip'' bifurcation. The equilibrium attracts points that are far away, but is not stable, leading to cycles of period 2. As p 1 and p 2 increase even further ...
Invaders - Lesson Corner
... comprehension. (Interspecific competition occurs when organisms of two or more different species are competing for the same resources.) Step 6. TURN ON sound for video. Select the video clip from the United Streaming Web Site: “Examples of Intraspecific and Interspecific Competition” which is a subt ...
... comprehension. (Interspecific competition occurs when organisms of two or more different species are competing for the same resources.) Step 6. TURN ON sound for video. Select the video clip from the United Streaming Web Site: “Examples of Intraspecific and Interspecific Competition” which is a subt ...
Population Ecology
... probability of finding another individual very close by. 2) Random distributions occur when the spacing between individuals is irregular. The presence of one individual does not directly affect the location of any other individual. Random distributions are uncommon in animals but are often seen in p ...
... probability of finding another individual very close by. 2) Random distributions occur when the spacing between individuals is irregular. The presence of one individual does not directly affect the location of any other individual. Random distributions are uncommon in animals but are often seen in p ...
Principles of Ecology
... A valid theory of evolution was propounded by Charles Darwin and Alfred Wallace in 1859. This theory has been extended in the light of progress in genetics and is known as Neo-Darwinism. It has the following features: 1. Organisms tend to produce more off springs that can be supported by the environ ...
... A valid theory of evolution was propounded by Charles Darwin and Alfred Wallace in 1859. This theory has been extended in the light of progress in genetics and is known as Neo-Darwinism. It has the following features: 1. Organisms tend to produce more off springs that can be supported by the environ ...
Chapter 5 notes
... – Too much or too little of any physical or chemical factor can limit or prevent growth of a population, even if all other factors are at or near the optimal range of tolerance ...
... – Too much or too little of any physical or chemical factor can limit or prevent growth of a population, even if all other factors are at or near the optimal range of tolerance ...
Population Ecology - Evergreen Archives
... a. Exponential growth occurs when r does not change over time. b. It does not depend on the number of individuals in the population. c. Growth continues indefinitely because increases in the size of the population do not affect the overall growth rate. d. An increased number of individuals are added ...
... a. Exponential growth occurs when r does not change over time. b. It does not depend on the number of individuals in the population. c. Growth continues indefinitely because increases in the size of the population do not affect the overall growth rate. d. An increased number of individuals are added ...
COMPETITION
... that minimize the impact of predators, in a similar manner to how niche refers to the set of conditions that allows species to co-exist. Need to briefly discuss apparent competition Defn: a species entering a community is similar enough to another that even if they do not directly compete the two sp ...
... that minimize the impact of predators, in a similar manner to how niche refers to the set of conditions that allows species to co-exist. Need to briefly discuss apparent competition Defn: a species entering a community is similar enough to another that even if they do not directly compete the two sp ...
Changes in Populations
... Lag phase: Population growth begins slowly from a few individuals. Exponential Phase: Exponential growth occurs, the conditions are ideal and maximum growth rate is reached. Transitional Phase: Growth rate begins to slow down as factors such as food, water and space become limiting. Plateau phase: C ...
... Lag phase: Population growth begins slowly from a few individuals. Exponential Phase: Exponential growth occurs, the conditions are ideal and maximum growth rate is reached. Transitional Phase: Growth rate begins to slow down as factors such as food, water and space become limiting. Plateau phase: C ...
Factors that increase population size
... Lag phase: Population growth begins slowly from a few individuals. Exponential Phase: Exponential growth occurs, the conditions are ideal and maximum growth rate is reached. Transitional Phase: Growth rate begins to slow down as factors such as food, water and space become limiting. Plateau phase: C ...
... Lag phase: Population growth begins slowly from a few individuals. Exponential Phase: Exponential growth occurs, the conditions are ideal and maximum growth rate is reached. Transitional Phase: Growth rate begins to slow down as factors such as food, water and space become limiting. Plateau phase: C ...
Why can`t we all just get along?
... their offspring, and mortality is highest as individuals approach their maximum life span; e.g. many large mammals like humans and elephants. Type II – there’s an equal probability of dying at any age; e.g. many medium sized birds and mammals. Type III – produce many offspring but invest little in e ...
... their offspring, and mortality is highest as individuals approach their maximum life span; e.g. many large mammals like humans and elephants. Type II – there’s an equal probability of dying at any age; e.g. many medium sized birds and mammals. Type III – produce many offspring but invest little in e ...
Document
... • Density dependent birth and death rates (as we just discussed). Many of these reflect – competition for resource (food/energy, nutrients, space/territories). – predation, parasites, disease – waste accumulation (e.g., ethanol) ...
... • Density dependent birth and death rates (as we just discussed). Many of these reflect – competition for resource (food/energy, nutrients, space/territories). – predation, parasites, disease – waste accumulation (e.g., ethanol) ...
Parasites that change predator or prey behaviour can have keystone
... indirect interactions impart keystone effects, promoting or inhibiting host coexistence. Parasites can thus have strong ecological impacts, even if they have negligible virulence, underscoring the need to consider trait-mediated effects when predicting effects of parasites on community structure in ...
... indirect interactions impart keystone effects, promoting or inhibiting host coexistence. Parasites can thus have strong ecological impacts, even if they have negligible virulence, underscoring the need to consider trait-mediated effects when predicting effects of parasites on community structure in ...