Population Ecology PPT
... • R Strategists Short life span Small body size Reproduce quickly Have many young Little parental care Ex: cockroaches, ...
... • R Strategists Short life span Small body size Reproduce quickly Have many young Little parental care Ex: cockroaches, ...
Population Ecology PPT
... Idealized models describe two kinds of population growth: 1. Exponential Growth ...
... Idealized models describe two kinds of population growth: 1. Exponential Growth ...
5.3 Populations
... *Any population has the potential to increase exponentially but conditions are never perfect. Food resources are limited, predation occurs, and abiotic conditions are factors. This limits population growth. ...
... *Any population has the potential to increase exponentially but conditions are never perfect. Food resources are limited, predation occurs, and abiotic conditions are factors. This limits population growth. ...
14.3 Factors Affecting Population Change
... • An ecological relationship in which one animal kills and eats another • Humans raise cattle for food, caring for them until they are slaughtered. This relationship can ultimately be described as predation • Predation is beneficial to one species, but usually lethal to the other • Wolves kill and e ...
... • An ecological relationship in which one animal kills and eats another • Humans raise cattle for food, caring for them until they are slaughtered. This relationship can ultimately be described as predation • Predation is beneficial to one species, but usually lethal to the other • Wolves kill and e ...
POPULATION GROWTH What determines the size of a population
... They can be abiotic or biotic. FOOD, SPACE and other important resources (sunlight, water, nutrients in the soil) DECREASE because they are shared between more organisms increases death rate decreases population. COMPETITION between organisms with the same niche increases increases death rate ...
... They can be abiotic or biotic. FOOD, SPACE and other important resources (sunlight, water, nutrients in the soil) DECREASE because they are shared between more organisms increases death rate decreases population. COMPETITION between organisms with the same niche increases increases death rate ...
Aim What is Carrying Capacity ?
... The graph provides information about the population of deer in a given area between 1900 and 1945. Which statement identifies the most likely reason that the carrying capacity of the area to support deer decreased between 1925 and 1930? 1.The deer population decreased in 1926. 2.The number of preda ...
... The graph provides information about the population of deer in a given area between 1900 and 1945. Which statement identifies the most likely reason that the carrying capacity of the area to support deer decreased between 1925 and 1930? 1.The deer population decreased in 1926. 2.The number of preda ...
carrying capacity
... • When prey populations increase, more predation occurs because- (1) predators encounter prey more often and (2) more prey support a bigger predator population. • When predators get too numerous, they reduce the prey population, thus depleting their food supply. • A change in the prey population ill ...
... • When prey populations increase, more predation occurs because- (1) predators encounter prey more often and (2) more prey support a bigger predator population. • When predators get too numerous, they reduce the prey population, thus depleting their food supply. • A change in the prey population ill ...
Quiz 5 Key
... b. a predator keeps the population of its prey species well below its carrying capacity. c. an early frost kills a large fraction of the insects in a population d. food limitation reduces the birth rate as the population increases e. none of the above ...
... b. a predator keeps the population of its prey species well below its carrying capacity. c. an early frost kills a large fraction of the insects in a population d. food limitation reduces the birth rate as the population increases e. none of the above ...
Name: Period: ______ Population Ecology – 53.4
... Natural selection shapes different life history traits under different environmental conditions. Some populations exhibit r-selection, and others K-selection. 1. On what is the life history of an organism based? ...
... Natural selection shapes different life history traits under different environmental conditions. Some populations exhibit r-selection, and others K-selection. 1. On what is the life history of an organism based? ...
Human Population Growth
... Until about 500 years ago, the world’s human population remained fairly stable. Then, as advances in medicine, agriculture, and technology occurred, the human population began growing very rapidly. Today, the world’s human population is greater than 6 billion people, and it continues to grow, but ...
... Until about 500 years ago, the world’s human population remained fairly stable. Then, as advances in medicine, agriculture, and technology occurred, the human population began growing very rapidly. Today, the world’s human population is greater than 6 billion people, and it continues to grow, but ...
POPULATION DYNAMICS
... births than deaths and carrying capacity can be temporarily exceeded Overshooting carrying capacity can lead to mass die-offs as resources run out Deaths exceed births and population again falls below carrying capacity ...
... births than deaths and carrying capacity can be temporarily exceeded Overshooting carrying capacity can lead to mass die-offs as resources run out Deaths exceed births and population again falls below carrying capacity ...
Document
... 1. Describe the various types of population distribution patterns that can occur in nature and comment on which is most common and why. (clumped, uniform, and random) 2. Define birth rate, death rate, immigration, and emigration. Write an equation to mathematically describe the relationship between ...
... 1. Describe the various types of population distribution patterns that can occur in nature and comment on which is most common and why. (clumped, uniform, and random) 2. Define birth rate, death rate, immigration, and emigration. Write an equation to mathematically describe the relationship between ...
Limits to Growth Section 5-2
... DDLF – limiting factor that depends on population size These factors become limiting only when the population density reaches a certain level Usually occurs when population is large and dense Ex: competition, predation, parasitism, disease ...
... DDLF – limiting factor that depends on population size These factors become limiting only when the population density reaches a certain level Usually occurs when population is large and dense Ex: competition, predation, parasitism, disease ...
QA: Populations - Liberty Union High School District
... This shape of age structure diagram shows positive population growth? This shape of age structure diagram shows zero population growth? This shape of age structure diagram shows negative population growth? Exponential growth results in a graph of what shape? The change in population over time (growt ...
... This shape of age structure diagram shows positive population growth? This shape of age structure diagram shows zero population growth? This shape of age structure diagram shows negative population growth? Exponential growth results in a graph of what shape? The change in population over time (growt ...
Chapter 4 * Population Ecology
... (nonliving) and includes weather events – drought, flooding, extreme heat or cold, tornadoes, and hurricanes. – Density-dependent factors = usually biotic (living) – predation, disease, parasites, and competition. • Isle Royale, U.P. Michigan ...
... (nonliving) and includes weather events – drought, flooding, extreme heat or cold, tornadoes, and hurricanes. – Density-dependent factors = usually biotic (living) – predation, disease, parasites, and competition. • Isle Royale, U.P. Michigan ...
global population
... (a) Rapid evolutionary rate (b) Large numbers of offspring (c) Short lifespan (d) Extensive parental care ...
... (a) Rapid evolutionary rate (b) Large numbers of offspring (c) Short lifespan (d) Extensive parental care ...
Population Ecology
... ▪ Occurs when a population’s growth slows or stops following exponential growth. ▪ A population stops increasing when the number of births < number of deaths, or when emigration > immigration. ...
... ▪ Occurs when a population’s growth slows or stops following exponential growth. ▪ A population stops increasing when the number of births < number of deaths, or when emigration > immigration. ...
Characteristics of Populations
... Carrying capacity refers to the maximum size of population the environment will support. The curve depicting the growth of a population that is limited by a definite carrying capacity is shaped like the letter “S”. A population crash occurs when a population overshoots its carrying capacity and envi ...
... Carrying capacity refers to the maximum size of population the environment will support. The curve depicting the growth of a population that is limited by a definite carrying capacity is shaped like the letter “S”. A population crash occurs when a population overshoots its carrying capacity and envi ...
Population-Ecology
... • Geographic Distribution/Range- describes area inhabited by population of organisms • Population Density- number of individuals per unit area; varies depending on species and its ecosystem • Growth rate- change in number of organisms/size of population over time • Age structure diagrams ...
... • Geographic Distribution/Range- describes area inhabited by population of organisms • Population Density- number of individuals per unit area; varies depending on species and its ecosystem • Growth rate- change in number of organisms/size of population over time • Age structure diagrams ...
Unit 4 Study Guide - Effingham County Schools
... a. Occurs when new individuals are added by ___________________ or ____________________________ Or when individuals are lost due to __________________________ or ___________________________ 6. The two kinds of population growth are: a. ___________________________________________________________ grow ...
... a. Occurs when new individuals are added by ___________________ or ____________________________ Or when individuals are lost due to __________________________ or ___________________________ 6. The two kinds of population growth are: a. ___________________________________________________________ grow ...
Slide 1 - willisworldbio
... Like the populations of many other living organisms, the size of the human population tends to ______ with time. 500 years ago the human population began to grow rapidly. 1. Agriculture and industry made life easier 2. Food supply more reliable. ...
... Like the populations of many other living organisms, the size of the human population tends to ______ with time. 500 years ago the human population began to grow rapidly. 1. Agriculture and industry made life easier 2. Food supply more reliable. ...
05 Populations and Demography
... (flowers in a field) 2. Uniform- Set distance between each (nesting sites) 3. Clumped- tightly packed pods or groups (school of fish) ...
... (flowers in a field) 2. Uniform- Set distance between each (nesting sites) 3. Clumped- tightly packed pods or groups (school of fish) ...
World population
In demographics and general statistics, the term world population refers to the total number of living humans on Earth. The United States Census Bureau estimates that the world population exceeded 7 billion on March 12, 2012. According to a separate estimate by the United Nations Population Fund, it reached this milestone on October 31, 2011. In July 2015, the Population Division of the United Nations Department of Economic and Social Affairs estimated the world population at approximately 7.3 billion.The world population has experienced continuous growth since the end of the Great Famine and the Black Death in 1350, when it was near 370 million. The highest growth rates – global population increases above 1.8% per year – occurred briefly during the 1950s, and for longer during the 1960s and 1970s. The global growth rate peaked at 2.2% in 1963, and has declined to 1.1% as of 2012. Total annual births were highest in the late 1980s at about 139 million, and are now expected to remain essentially constant at their 2011 level of 135 million, while deaths number 56 million per year, and are expected to increase to 80 million per year by 2040.The 2012 UN projections show a continued increase in population in the near future with a steady decline in population growth rate; the global population is expected to reach between 8.3 and 10.9 billion by 2050. 2003 UN Population Division population projections for the year 2150 range between 3.2 and 24.8 billion. One of many independent mathematical models supports the lower estimate, while a 2014 estimate forecasts between 9.3 and 12.6 billion in 2100, and continued growth thereafter. Some analysts have questioned the sustainability of further world population growth, highlighting the growing pressures on the environment, global food supplies, and energy resources.Various scholarly estimates have been made of the total number of humans who have ever lived, giving figures ranging from approximately 100 billion to 115 billion.