Human Population Growth - Crash Course Ecology #3
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Date: 2022-04-04
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Comments and reviews: 9
Taylor
Human Population Growth - Crash Course Ecology #3 NOTES-
1: Human Population Growth-
1. 1: Human population has increased exponentially for a few hundred years, and it-s important to know why this is happening and how long exponential growth can be sustained-
2: R vs K Selection Theory-
2. 1: Quantity vs quality determines how individuals reproduce, known as the R vs K Selection Theory-
2. 2: Some organisms will aim towards exponential growth while others will only reproduce up to the carrying capacity-
2. 2. 1: R-Selected species go by the former (r stands for rate) while K-Selected species go by the latter (k stands for carrying capacity)-
3: Human Growth-
3. 1: Humans should lean heavily towards K because they only have a few children, but invest in them heavily-
3. 2: Instead, humans have begun to resemble an R as shown by the exponential growth- of human population
3. 3: Humans have removed or mitigated limiting factors, allowing carrying capacity to grow indefinitely-
3. 3. 1: Agriculture became mechanized around the 17th century, increasing food production-
3. 3. 2: Medical advances such as vaccination allowed more children to survive to adulthood and make their own children-
3. 3. 3: Sewage systems, beginning in the 1500s, prevented the spread of disease-
3. 3. 4: 20th century advances allowed human habitation basically anywhere-
3. 4: Every human increases carrying capacity slightly, but this will end eventually-
4: Ecological Footprint-
4. 1: An ecological footprint determines what resources each person requires, and differs based on individual habits-
4. 2: While we can theoretically fit 1 trillion people on Earth, they would conflict over space and resources-
4. 3: Also, other species suffer from human overpopulation as there is limited and decreasing available space, water, and food, giving support to the theory that we are currently living through an extinction event-
5: Limits to Growth-
5. 1: Growth rates peaked around 1962 and have decreased since as cultural shifts have led to women entering the workforce-
5. 2: Also, back when most people lived on farms, having more children was an asset as they could provide free work and were relatively cheap-
5. 2. 1: With more people living in cities, children have become liabilities as they are expensive and can-t provide labor for the family
reply
Human Population Growth - Crash Course Ecology #3 NOTES-
1: Human Population Growth-
1. 1: Human population has increased exponentially for a few hundred years, and it-s important to know why this is happening and how long exponential growth can be sustained-
2: R vs K Selection Theory-
2. 1: Quantity vs quality determines how individuals reproduce, known as the R vs K Selection Theory-
2. 2: Some organisms will aim towards exponential growth while others will only reproduce up to the carrying capacity-
2. 2. 1: R-Selected species go by the former (r stands for rate) while K-Selected species go by the latter (k stands for carrying capacity)-
3: Human Growth-
3. 1: Humans should lean heavily towards K because they only have a few children, but invest in them heavily-
3. 2: Instead, humans have begun to resemble an R as shown by the exponential growth- of human population
3. 3: Humans have removed or mitigated limiting factors, allowing carrying capacity to grow indefinitely-
3. 3. 1: Agriculture became mechanized around the 17th century, increasing food production-
3. 3. 2: Medical advances such as vaccination allowed more children to survive to adulthood and make their own children-
3. 3. 3: Sewage systems, beginning in the 1500s, prevented the spread of disease-
3. 3. 4: 20th century advances allowed human habitation basically anywhere-
3. 4: Every human increases carrying capacity slightly, but this will end eventually-
4: Ecological Footprint-
4. 1: An ecological footprint determines what resources each person requires, and differs based on individual habits-
4. 2: While we can theoretically fit 1 trillion people on Earth, they would conflict over space and resources-
4. 3: Also, other species suffer from human overpopulation as there is limited and decreasing available space, water, and food, giving support to the theory that we are currently living through an extinction event-
5: Limits to Growth-
5. 1: Growth rates peaked around 1962 and have decreased since as cultural shifts have led to women entering the workforce-
5. 2: Also, back when most people lived on farms, having more children was an asset as they could provide free work and were relatively cheap-
5. 2. 1: With more people living in cities, children have become liabilities as they are expensive and can-t provide labor for the family
reply
Bao46
But the definition of carrying capacity is that the environment can host a maximum amount of organisms indefinitely and in a sustainable manner, so applying that to humans' current situation, I don't think that the carrying capacity of Earth is 10-15 billion, as we are already seeing signs that 7+ billion isn't sustainable through climate change and the endangerment of other species. In my opinion, we've already passed the carrying capacity of Earth, and with the human birth rate overwhelming the death rate, it not super good.
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But the definition of carrying capacity is that the environment can host a maximum amount of organisms indefinitely and in a sustainable manner, so applying that to humans' current situation, I don't think that the carrying capacity of Earth is 10-15 billion, as we are already seeing signs that 7+ billion isn't sustainable through climate change and the endangerment of other species. In my opinion, we've already passed the carrying capacity of Earth, and with the human birth rate overwhelming the death rate, it not super good.
reply
Patricia
R stands for religious because religious people are R species.
Population growth causes: Tinder, Polyamory, Babies are cute, Humans are just horny, INFINITE CARRYING CAPACITY
Limiting factors of population growth: LGBTQ acceptance, not wanting babies, abortion (or, as some people like to call it, killing babies)
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R stands for religious because religious people are R species.
Population growth causes: Tinder, Polyamory, Babies are cute, Humans are just horny, INFINITE CARRYING CAPACITY
Limiting factors of population growth: LGBTQ acceptance, not wanting babies, abortion (or, as some people like to call it, killing babies)
reply
Johnny
inter net says -Over 17, 000 humans most children die each 24 hours (a day) from Over population. U want to raise children in a loving environment. Please just ADOPT and maybe get u and as many plp around you to get STERILIZED. why do children have to die -just because u want a child that may look like you!
reply
inter net says -Over 17, 000 humans most children die each 24 hours (a day) from Over population. U want to raise children in a loving environment. Please just ADOPT and maybe get u and as many plp around you to get STERILIZED. why do children have to die -just because u want a child that may look like you!
reply
Taragon
I see the argument towards vegetarianism to feed the world, but there are nutrients and vitamins that you can't get from plants and only from meat. If you want a healthy population, you need some meat in your diet.
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I see the argument towards vegetarianism to feed the world, but there are nutrients and vitamins that you can't get from plants and only from meat. If you want a healthy population, you need some meat in your diet.
reply
SirPuggsly
I refuse to have children until gay couples are allowed to produce children.
Furthermore, why are advanced societies so worried about over population. We account for a fraction of the overall population.
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I refuse to have children until gay couples are allowed to produce children.
Furthermore, why are advanced societies so worried about over population. We account for a fraction of the overall population.
reply
Gilberts
I'm saying it. The human population is going to be the down fall of Earth. We're pushing our planet so far to its limits that humans themselves will be the cause of their own extinction
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I'm saying it. The human population is going to be the down fall of Earth. We're pushing our planet so far to its limits that humans themselves will be the cause of their own extinction
reply
Tanz
Table of Contents
1) R vs. K Selection Theory 01: 41
2) Causes of Exponential Human Growth 03: 24
3) Human Carrying Capacity 03: 30
4) Ecological Footprints 06: 40
reply
Table of Contents
1) R vs. K Selection Theory 01: 41
2) Causes of Exponential Human Growth 03: 24
3) Human Carrying Capacity 03: 30
4) Ecological Footprints 06: 40
reply
Forgiving
We should stop people from having babies and have them adopt. We should also over price medications for a period of time and the population would go down.
reply
We should stop people from having babies and have them adopt. We should also over price medications for a period of time and the population would go down.
reply
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