How does human population growth contribute to each of the main factors causing species extincti

How does human population growth contribute to each of the...

Key Concepts

Invasive Species

Invasive species are non-native organisms that are introduced to new environments, where they can outcompete, predate, or bring diseases to indigenous species. Human population growth often facilitates the spread of these species through global trade, travel, and habitat modification, which can further contribute to native species' declines and extinctions.

Human Population Growth

This refers to the increase in the number of people inhabiting the Earth. It is a key driver of environmental pressure as it increases demands for resources such as land, water, and energy, which intensifies the impacts on natural ecosystems. This concept is crucial for understanding how human expansion alters ecological balances and contributes indirectly to species extinction.

Habitat Destruction

Habitat destruction involves the alteration or elimination of natural environments, rendering them unsuitable for the species that originally inhabited them. As human populations grow, expanded urban areas, agriculture, and infrastructure development lead to increased habitat fragmentation and loss, which disrupts ecosystems and reduces biodiversity.

Overexploitation

Overexploitation describes the unsustainable harvesting or use of species by human activities. With a growing population, the demand for food, medicine, ornamentals, and other ecological resources escalates, often leading to the decline or extinction of species due to excessive hunting, fishing, or harvesting practices.

Pollution

Pollution encompasses the introduction of harmful substances into the environment, including chemicals, plastics, and other waste products. As human populations increase, so does the volume of waste generated, which leads to soil, water, and air contamination. This degradation of the natural environment can detrimentally affect the health of various species and contribute to their extinction.

Climate Change

Climate change refers to significant alterations in global temperature and weather patterns, primarily due to human activities such as burning fossil fuels and deforestation. A larger human population contributes to higher greenhouse gas emissions, which changes the climate. These changes can alter habitats and disrupt the timing of biological events, further exacerbating species extinction risks.

Transcript

00:01 Okay, so this question is asking basically how does human overpopulation or human population growth contribute to the loss of species? okay, the biodiversity loss, you know? biodiversity loss and climate change are very intertwined.

00:18 Okay.

00:18 And one of those major concepts or major reasons is human overpopulation.

00:23 Okay, human population growth.

00:29 Now, the more humans there are, the more.

00:33 Space we need.

00:34 We need space.

00:38 We need food.

00:41 Okay? and we need raw materials.

00:46 Okay.

00:47 Now, our need for space is things, you know, like where to live and shelter.

00:54 When we, when more, there are more humans, and we're having more children and there more, we need more places to live.

01:02 Okay.

01:03 So we need shelter and housing.

01:06 Now, we've got to put that stuff something.

01:08 Don't we? and oftentimes we crowd out other species by taking their land, taking where they live.

01:16 Okay.

01:17 Now, these animals have lived there traditionally for thousands of years, for millennia.

01:23 They are specially adapted to live in that area.

01:27 Okay? you can't just take an animal typically and put it in a different habitat and expect it to thrive.

01:35 It might, which lead to something else called invasive species.

01:39 But, most of them can't really survive very well.

01:42 For example, you can't take an amazonian parrot who has evolved to thrive in a warm, humid, wet environment and put it down in the arctic tundra where it's extremely cold and dry.

01:57 It would die.

01:57 It would not reproduce.

01:58 It would die.

01:59 It would not know how to find food.

02:01 Okay.

02:02 So it's not that simple.

02:03 Humans, we can move from one habitat to another and it will be okay.

02:08 You know, we might not like it that it's cold, but we have the ability to put more clothes on.

02:13 Okay? it's a very simple example.

02:15 But animals aren't able to do that.

02:17 And so what happens is you'll have a lot of species laws.

02:20 They will be very devastated by that, and the species will die out...