🌍The world population is projected to reach 9 billion by 2050.
🐾Increased human population density puts pressure on animal and plant populations.
🌳Habitat reduction and invasion of species are consequences of population growth.
💀Species extinctions may occur due to population expansion.
📊Population growth can be limited by density-dependent or density-independent factors.
What is the projected world population by 2050?
—The world population is projected to reach 9 billion by 2050.
How does population growth affect animal and plant populations?
—Increased human population density puts pressure on animal and plant populations, leading to habitat reduction, invasive species, and species extinctions.
What factors can limit population growth?
—Population growth can be limited by density-dependent factors (such as the number of individuals in an area) or density-independent factors (such as environmental stresses).
What are some consequences of population growth?
—Consequences of population growth include habitat reduction, invasion of species, and species extinctions.
How do demographic variables impact population growth?
—Demographic variables such as population density, age structure, and migration can influence human population growth.
00:05In 1804, the world population was 1 billion.
00:09123 years later, the population doubled to 2 billion.
00:24The population doubled again to 4 billion in just 47 years.
00:30By 2050, the world population is projected to reach 9 billion.
00:45Increased human population density puts pressure on other organisms.
00:58Limits to human population growth can be density-dependent or density-independent.
01:09Density-dependent factors limit population growth based on the number of individuals in an area.
01:16Density-independent factors limit population growth due to environmental stresses.
