PVA
... simulations, tally number of extinction events) + indicates which factors are most important in declines – requires large amounts of data – not generalizable - build anew for each species ...
... simulations, tally number of extinction events) + indicates which factors are most important in declines – requires large amounts of data – not generalizable - build anew for each species ...
File
... Some species need a large population density to display social interaction Threatened populations may have low reproductive success If a species has low reproductive rates, they need increased numbers to maintain the population ...
... Some species need a large population density to display social interaction Threatened populations may have low reproductive success If a species has low reproductive rates, they need increased numbers to maintain the population ...
ENVIRONMENTAL SCIENCE
... individuals and the long-term welfare of society is the main difficulty in solving environmental problems. The “commons” of the essay was an area of land that belonged to the whole village. The short-term interest of the individual was to put as many animals on the area for grazing as possible – if ...
... individuals and the long-term welfare of society is the main difficulty in solving environmental problems. The “commons” of the essay was an area of land that belonged to the whole village. The short-term interest of the individual was to put as many animals on the area for grazing as possible – if ...
Unit 5
... 1. Define the scope of population ecology. All characteristics of population research including measuring diversity, patters of dispersion, and limiting factors. 2. Distinguish between density and dispersion. Density is the number of individual per unit area or volume and dispersion is the spacing o ...
... 1. Define the scope of population ecology. All characteristics of population research including measuring diversity, patters of dispersion, and limiting factors. 2. Distinguish between density and dispersion. Density is the number of individual per unit area or volume and dispersion is the spacing o ...
Ecology Test *Use Answer sheet TEST A Test Number: Chapter 3, 4
... 1. The branch of biology dealing with interactions among organisms and between organism and their environment is a. economy b. modeling c. recycling d. ecology 2. Which of the following descriptions about the organization of an ecosystem is correct? a. communities make up species, which make up popu ...
... 1. The branch of biology dealing with interactions among organisms and between organism and their environment is a. economy b. modeling c. recycling d. ecology 2. Which of the following descriptions about the organization of an ecosystem is correct? a. communities make up species, which make up popu ...
Unit_3_population
... Doubling Time = The amount of time it takes for a population to double in size (assuming that it’s growth rate (r) doesn’t change) Doubling time can identify a country as highly, moderate, or less developed. The shorter the doubling time the less developed the country! Formula (simplified): TD (time ...
... Doubling Time = The amount of time it takes for a population to double in size (assuming that it’s growth rate (r) doesn’t change) Doubling time can identify a country as highly, moderate, or less developed. The shorter the doubling time the less developed the country! Formula (simplified): TD (time ...
12.2 - Demography
... Fecundity – is the potential for a species to produce offspring in a lifetime. Generation Time - is the average time between the birth of an organism and the birth of the offspring. Sex Ratio – is the relative proportion of males and females in a population. Fecundity is the potential reproductive c ...
... Fecundity – is the potential for a species to produce offspring in a lifetime. Generation Time - is the average time between the birth of an organism and the birth of the offspring. Sex Ratio – is the relative proportion of males and females in a population. Fecundity is the potential reproductive c ...
Document
... The difference between the birth rate and the death rate is the per capita growth rate r=b-d The growth equation can be rewritten as ∆N = rN or dN = rN ∆t dt Exponential growth occurs when resources are unlimited and the population is small (doesn’t happen often). The r is maximal (rmax) and it is c ...
... The difference between the birth rate and the death rate is the per capita growth rate r=b-d The growth equation can be rewritten as ∆N = rN or dN = rN ∆t dt Exponential growth occurs when resources are unlimited and the population is small (doesn’t happen often). The r is maximal (rmax) and it is c ...
Chapter12-HumanInteractions
... In 2013, Earth Overshoot Day fell on August 20 – the day when the world has used as much of Earth’s resources as Earth can replace in one year. ...
... In 2013, Earth Overshoot Day fell on August 20 – the day when the world has used as much of Earth’s resources as Earth can replace in one year. ...
chapter5B - TJ
... • Limiting factor principle • 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 ...
... • Limiting factor principle • 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 ...
Final Study Guide
... compounds suspended in the atmosphere, is a source of pollution that harms the environment and causes respiratory problems. The increased use of ____CFCs____, also known as chlorofluorocarbons, is the major cause of ozone depletion. The ___ozone___ _____layer_____ is so important. It is made up of ...
... compounds suspended in the atmosphere, is a source of pollution that harms the environment and causes respiratory problems. The increased use of ____CFCs____, also known as chlorofluorocarbons, is the major cause of ozone depletion. The ___ozone___ _____layer_____ is so important. It is made up of ...
CP CHEMISTRY STUDY GUIDE
... BIO.B.4.2.1 Describe how energy flows through and ecosystem (food chains, food webs) BIO.B.4.2.2 Describe biotic interactions in an ecosystem (competition, predation, symbiosis) BIO.B.4.2.5 Describe the effects of limiting factors on population dynamics and potential species extinction. ...
... BIO.B.4.2.1 Describe how energy flows through and ecosystem (food chains, food webs) BIO.B.4.2.2 Describe biotic interactions in an ecosystem (competition, predation, symbiosis) BIO.B.4.2.5 Describe the effects of limiting factors on population dynamics and potential species extinction. ...
Population Ecology
... The change in population size (N) over time (t) is the same as the birth rate (B) minus the death rate (D) Exponential Growth: dN/dt =rmax •N The change in population size over time is equal to the growth rate (rmax) multiplied with the current population ...
... The change in population size (N) over time (t) is the same as the birth rate (B) minus the death rate (D) Exponential Growth: dN/dt =rmax •N The change in population size over time is equal to the growth rate (rmax) multiplied with the current population ...
Ecology Intro
... – Base Logistic equation – (1-(N/K)) is the unoccupied portion of the carrying capacity ...
... – Base Logistic equation – (1-(N/K)) is the unoccupied portion of the carrying capacity ...
SC20F Ecology Unit Review Name: 1. Define the following terms
... b. What would be the new population? ...
... b. What would be the new population? ...
... • The logistic population growth model and life histories. – This model predicts different growth rates for different populations, relative to carrying capacity. • Resource availability depends on the situation. • The life history traits that natural selection favors may vary with population densit ...
Sustaining Fisheries Yields Over Evolutionary Time Scales
... lack larger and/or older individuals (2–4). This occurs not only because fishers may seek to exploit large individuals but also because regulatory measures often impose minimum size or gear regulations that ensure selective harvest of larger fish. Such harvesting practices could favor genotypes with ...
... lack larger and/or older individuals (2–4). This occurs not only because fishers may seek to exploit large individuals but also because regulatory measures often impose minimum size or gear regulations that ensure selective harvest of larger fish. Such harvesting practices could favor genotypes with ...
Biodiversity, Species Interactions, and Population Control Chapter 5
... Intrinsic rate of increase (r)= rate of population growth with unlimited resources Individuals in populations with high r ...
... Intrinsic rate of increase (r)= rate of population growth with unlimited resources Individuals in populations with high r ...
Document
... competition • The ultimate effect of competition is a decreased contribution to the next generation; – Intraspecific competition leads to decreased rates of resource intake per individual, decreased rates of individual growth or development, or to decreases in the amounts of stored reserves; – These ...
... competition • The ultimate effect of competition is a decreased contribution to the next generation; – Intraspecific competition leads to decreased rates of resource intake per individual, decreased rates of individual growth or development, or to decreases in the amounts of stored reserves; – These ...
Ecosystems and Communities
... and abiotic factors that affect it Niche: an organism’s habitat plus its role in an ecosystem ...
... and abiotic factors that affect it Niche: an organism’s habitat plus its role in an ecosystem ...
REACH Populations
... Which explains the high birth rate in contrast to the rapidly declining death rate during industrialization? A. The average age of marriage increasing B. Nations becoming more developed C. Increases in many areas including technological and medical innovations D. Increase in educational and employme ...
... Which explains the high birth rate in contrast to the rapidly declining death rate during industrialization? A. The average age of marriage increasing B. Nations becoming more developed C. Increases in many areas including technological and medical innovations D. Increase in educational and employme ...
File
... Answer: The ferns that grow along side the pond. • Organisms interact with both the living and the non-living portions of the ecosystem. • Ecosystems are divided into two main parts: Biotic Factors and Abiotic Factors. ...
... Answer: The ferns that grow along side the pond. • Organisms interact with both the living and the non-living portions of the ecosystem. • Ecosystems are divided into two main parts: Biotic Factors and Abiotic Factors. ...
File
... Population density is the number of individuals per unit area. Population distribution is how individuals are spaced out in their range. Growth rate determines whether a population grows, shrinks, or stays the same size. Age structure is the number of males and females of each age in a population. P ...
... Population density is the number of individuals per unit area. Population distribution is how individuals are spaced out in their range. Growth rate determines whether a population grows, shrinks, or stays the same size. Age structure is the number of males and females of each age in a population. P ...
Energy Flow
... its density. These are abiotic factors in the community. Density-dependent factors or population controls have a greater affect on the population as its density increases. Infectious disease is an example of densitydependent population control. ...
... its density. These are abiotic factors in the community. Density-dependent factors or population controls have a greater affect on the population as its density increases. Infectious disease is an example of densitydependent population control. ...