Biotic Potential
... • Some populations fluctuate each year but have a fairly obvious pattern whereas other populations can fluctuate wildly from year to year not producing an obvious trend. – Boom and bust – Colonizers – Random cycles ...
... • Some populations fluctuate each year but have a fairly obvious pattern whereas other populations can fluctuate wildly from year to year not producing an obvious trend. – Boom and bust – Colonizers – Random cycles ...
Population size
... – Little parental care – Reproduce early, often K selected – Population adapted to being at carrying capacity – Few offspring – Lots of parental care – Reproduce late, infrequently ...
... – Little parental care – Reproduce early, often K selected – Population adapted to being at carrying capacity – Few offspring – Lots of parental care – Reproduce late, infrequently ...
Practice Test Ch.15 1. The population distribution for a country
... What happens to a population once its carrying capacity is reached? List two density-dependent factors that can affect human populations. The population distribution for a country shows that each age structure is about the same size. What type of population growth is this country experiencing? a. sl ...
... What happens to a population once its carrying capacity is reached? List two density-dependent factors that can affect human populations. The population distribution for a country shows that each age structure is about the same size. What type of population growth is this country experiencing? a. sl ...
Chapter 2: Single species growth models
... r is sometimes called the intrinsic or instantaneous rate of increase. It expresses the balance between birth and death processes. Here are some conditions under which populations may grow exponentially for a short period of time. 1) Invasive species when they first arrive. 2) Species colonizing a n ...
... r is sometimes called the intrinsic or instantaneous rate of increase. It expresses the balance between birth and death processes. Here are some conditions under which populations may grow exponentially for a short period of time. 1) Invasive species when they first arrive. 2) Species colonizing a n ...
ch08_sec1 printout
... • A population may increase beyond this number but it cannot stay at this increased size. • Because ecosystems change, carrying capacity is difficult to predict or calculate exactly. However, it may be estimated by looking at average population sizes or by observing a population crash after a certai ...
... • A population may increase beyond this number but it cannot stay at this increased size. • Because ecosystems change, carrying capacity is difficult to predict or calculate exactly. However, it may be estimated by looking at average population sizes or by observing a population crash after a certai ...
ch 5-6 test and core
... d. enters a phase of exponential growth. ____ 20. When the exponential phase of a logistic growth curve of a population ceases, a. the size of the population drops. b. the size of the population stays the same. c. population growth begins to slow down. d. population growth begins to speed up. ____ 2 ...
... d. enters a phase of exponential growth. ____ 20. When the exponential phase of a logistic growth curve of a population ceases, a. the size of the population drops. b. the size of the population stays the same. c. population growth begins to slow down. d. population growth begins to speed up. ____ 2 ...
5-1 How Populations Grow
... abiotic factors. Together biotic and abiotic factors determine the survival of both an organism and the productivity of the ...
... abiotic factors. Together biotic and abiotic factors determine the survival of both an organism and the productivity of the ...
demography review
... based on discrete one-year age-classes, each potentially including a bout of reproduction. In this class, all of the equations are given in the discrete form that is most widely used. However, all of these equations can be written in continuous form using integration rather than summation - that is ...
... based on discrete one-year age-classes, each potentially including a bout of reproduction. In this class, all of the equations are given in the discrete form that is most widely used. However, all of these equations can be written in continuous form using integration rather than summation - that is ...
Nerve activates contraction
... 6.They take little care of their offspring, and infant mortality is huge. 7.They have efficient means of dispersal to new habitats. 8. They are usually found in disturbed and/or transitory habitats ...
... 6.They take little care of their offspring, and infant mortality is huge. 7.They have efficient means of dispersal to new habitats. 8. They are usually found in disturbed and/or transitory habitats ...
Population Dynamics #3: Symbiotic Relationships and Life Strategies
... times that the individuals reproduce in a ____________; and (4) the life span of the ___________. An _____________ growth pattern is a growth pattern that begins with a brief _________ phase (slower growth), followed by much more ___________ growth as the number of _____________ capable of reprodu ...
... times that the individuals reproduce in a ____________; and (4) the life span of the ___________. An _____________ growth pattern is a growth pattern that begins with a brief _________ phase (slower growth), followed by much more ___________ growth as the number of _____________ capable of reprodu ...
Populations
... species, which interbreed and live in the same place at the same time Ex: Humans in Negaunee Grey squirrels in Marquette White-tailed deer in Ishpeming ...
... species, which interbreed and live in the same place at the same time Ex: Humans in Negaunee Grey squirrels in Marquette White-tailed deer in Ishpeming ...
Welcome to Class
... Density Dependent Factors Def. – any factor that depends on the number of organisms • Biotic factors – Predation, disease, parasites, competition, over crowding ...
... Density Dependent Factors Def. – any factor that depends on the number of organisms • Biotic factors – Predation, disease, parasites, competition, over crowding ...
populations
... Exponential growth curve: population growth plotted against time. As a population gets larger, it also grows at a faster rate. This is the maximum population growth under ideal circumstances. Includes plenty of room for each member, unlimited resources (food, water) and no hindrances (predators). ...
... Exponential growth curve: population growth plotted against time. As a population gets larger, it also grows at a faster rate. This is the maximum population growth under ideal circumstances. Includes plenty of room for each member, unlimited resources (food, water) and no hindrances (predators). ...
Define the scope of population ecology
... but cannot do so indefinitely 12. Describe the history of human population growth. a. Exponential growth since the Industrial Revolution b. Birth rate steady, death rate down from medicine, sanitation, etc. c. Greatest pressure on the global environment 13. Define the demographic transition. a. Tran ...
... but cannot do so indefinitely 12. Describe the history of human population growth. a. Exponential growth since the Industrial Revolution b. Birth rate steady, death rate down from medicine, sanitation, etc. c. Greatest pressure on the global environment 13. Define the demographic transition. a. Tran ...
Chapter 26
... population may reach 8.9 billion by 2050. 1. The total fertility rate (TFR) is the average number of children born to women during their reproductive years, and is currently 2.8 children per female. 2. Even if the replacement level of fertility is achieved (about two children per woman), the human p ...
... population may reach 8.9 billion by 2050. 1. The total fertility rate (TFR) is the average number of children born to women during their reproductive years, and is currently 2.8 children per female. 2. Even if the replacement level of fertility is achieved (about two children per woman), the human p ...
Population and Community Ecology
... B. Other growth cycles are influenced by those of other populations in their environments V. Survivorship curves are graphic representations of the age structure of a given population. They are used to predict the future growth of the population. A. Type_____ - reflect relatively low death rates ear ...
... B. Other growth cycles are influenced by those of other populations in their environments V. Survivorship curves are graphic representations of the age structure of a given population. They are used to predict the future growth of the population. A. Type_____ - reflect relatively low death rates ear ...
Population Dynamics
... Series of events from birth through reproduction to death. death • Two basic types of life history strategies: 1. Opportunistic life history (r-selected species) 2. Equilibrial life history (K-selected species) ...
... Series of events from birth through reproduction to death. death • Two basic types of life history strategies: 1. Opportunistic life history (r-selected species) 2. Equilibrial life history (K-selected species) ...
What Is a Population
... Exponential growth occurs in nature only when populations have plenty of food and space, and have no competition or predators. For example, population explosions occur when bacteria or molds grow on a new source of food. ...
... Exponential growth occurs in nature only when populations have plenty of food and space, and have no competition or predators. For example, population explosions occur when bacteria or molds grow on a new source of food. ...
POPULATION DYNAMICS
... no differences between individuals due to age or body size and are reproductive when born. Finally, there is continuous growth and r is function of current population size (Gotelli, 10). ...
... no differences between individuals due to age or body size and are reproductive when born. Finally, there is continuous growth and r is function of current population size (Gotelli, 10). ...
2.6_Ecosystem Changes
... place at the same time Resources: food, water, shelter, space and mates In theory populations can grow to an infinite size, but they are limited by resources This causes individuals to compete for resources (remember intraspecific and interspecific competition!). ...
... place at the same time Resources: food, water, shelter, space and mates In theory populations can grow to an infinite size, but they are limited by resources This causes individuals to compete for resources (remember intraspecific and interspecific competition!). ...
Population Dynamics
... • The reproductive strategy of an r-strategist is to produce as many offspring as possible in a short time period in order to take advantage of some environmental factor. • Usually controlled by density-independent factors • The carrying capacity, or k-strategy, is an adaptation for living in enviro ...
... • The reproductive strategy of an r-strategist is to produce as many offspring as possible in a short time period in order to take advantage of some environmental factor. • Usually controlled by density-independent factors • The carrying capacity, or k-strategy, is an adaptation for living in enviro ...
Population
... Exponential human growth: for most human existence the population grew slowly. Nat'l Geographic Pop Growth ...
... Exponential human growth: for most human existence the population grew slowly. Nat'l Geographic Pop Growth ...