https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/v/deforestation-ur 2025-08-08T00:50:08.705567982Z Deforestation Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Deforestation Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/qrKitSVvEdM.mp4/qrKitSVvEdM.mp4 187 Effects of humans on ecosystems https://www.khanacademy.org/science/ap-biology/ecology-ap/disruptions-to-ecosystems/v/human-activities-that-threaten-biodiversity 2024-05-06T19:22:43.24334365Z Human activities that threaten biodiversity Biodiversity is threatened by human population growth and resource utilization, leading to decreased species richness. Local factors contributing to biodiversity loss include land-use changes, pollution, resource exploitation, and introduction of exotic species. Balancing human needs with ecosystem health requires doing more with less and preserving species richness for a sustainable future. California Academy of Sciences video https://cdn.kastatic.org/googleusercontent/lIwFyjJR3YjUIMdXu-SqvzHvpWcBxkgWTdk3ak7DkceypH3Lo6QrlIREWwRfs9yyLfJu6m7JtI_3jthsDjlFcoGx Human activities that threaten biodiversity Biodiversity is threatened by human population growth and resource utilization, leading to decreased species richness. Local factors contributing to biodiversity loss include land-use changes, pollution, resource exploitation, and introduction of exotic species. Balancing human needs with ecosystem health requires doing more with less and preserving species richness for a sustainable future. https://cdn.kastatic.org/ka-youtube-converted/2RC3Hsk90t8.mp4/2RC3Hsk90t8.mp4 771 Effects of humans on ecosystems https://www.khanacademy.org/science/ap-biology/ecology-ap/disruptions-to-ecosystems/v/introduced-species-and-biodiversity 2023-06-22T09:47:49.118446933Z Introduced species and biodiversity Introduced species, also known as exotic species, can disrupt ecosystems and harm native species. While some introduced species benefit humans and native species, invasive species outcompete natives, causing ecological damage. Invasive species often lack natural predators and can introduce diseases, parasites, and pathogens. It is important to recognize and mitigate the impact of invasive species on ecosystems to preserve biodiversity and maintain healthy ecological functions. California Academy of Sciences video https://cdn.kastatic.org/googleusercontent/YAfumdqpkEa2m5KjSHwj99JO7D9dW_veuMQXu50IOyEjVCTHeXjJdIrv2ejgzxR5Gn8pLZayvodqQFRNbE2tEUE Introduced species and biodiversity Introduced species, also known as exotic species, can disrupt ecosystems and harm native species. While some introduced species benefit humans and native species, invasive species outcompete natives, causing ecological damage. Invasive species often lack natural predators and can introduce diseases, parasites, and pathogens. It is important to recognize and mitigate the impact of invasive species on ecosystems to preserve biodiversity and maintain healthy ecological functions. https://cdn.kastatic.org/ka-youtube-converted/J-ftiWffNTc.mp4/J-ftiWffNTc.mp4 596 Effects of humans on ecosystems https://www.khanacademy.org/science/ap-biology/ecology-ap/disruptions-to-ecosystems/v/how-does-climate-change-affect-biodiversity 2024-05-06T19:22:43.24334365Z How does climate change affect biodiversity? Global warming, caused by increasing greenhouse gas emissions, threatens biodiversity. As temperatures rise, species struggle to adapt, leading to extinctions and ecosystem disruptions. Melting ice contributes to sea level rise, endangering low-lying habitats. Additionally, increased carbon dioxide levels affect plant growth and biodiversity, potentially exacerbating climate change through feedback loops. Urgent action is needed to address these challenges and protect our planet's diverse ecosystems. California Academy of Sciences video https://cdn.kastatic.org/googleusercontent/d-YQkLRjmNiut6yWmhv9zRc2_yI-3t5mZFb38VZKHy44nHhmMvWJEFnNdlePvmCNHqsDHkeXIi23btU4mXtZ3Iw-TQ How does climate change affect biodiversity? Global warming, caused by increasing greenhouse gas emissions, threatens biodiversity. As temperatures rise, species struggle to adapt, leading to extinctions and ecosystem disruptions. Melting ice contributes to sea level rise, endangering low-lying habitats. Additionally, increased carbon dioxide levels affect plant growth and biodiversity, potentially exacerbating climate change through feedback loops. Urgent action is needed to address these challenges and protect our planet's diverse ecosystems. https://cdn.kastatic.org/ka-youtube-converted/XFmovUAWQUQ.mp4/XFmovUAWQUQ.mp4 727 Effects of humans on ecosystems https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/v/plastics-and-environment-pk 2025-12-18T18:40:53.641757593Z Plastics and environment Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Plastics and environment Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/ZAAzbw_ei9Q.mp4/ZAAzbw_ei9Q.mp4 358 Effects of humans on ecosystems https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:aquatic-and-terrestrial-pollution/x0b0e430a38ebd23f:sources-of-pollution/v/human-impact-on-aquatic-environments 2024-06-21T23:15:14.703721694Z Human impact on aquatic environments Human activities cause significant stress to aquatic environments, leading to devastating effects on ecosystems. Warming ocean temperatures damage coral reefs, oil spills harm marine life, and nutrient pollution creates oceanic dead zones. Additionally, the introduction of toxic substances like mercury further threatens aquatic biodiversity. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/238f89e4-6b9a-4b3e-aeb5-1ae104cdfb17_1280_720_base.png Human impact on aquatic environments Human activities cause significant stress to aquatic environments, leading to devastating effects on ecosystems. Warming ocean temperatures damage coral reefs, oil spills harm marine life, and nutrient pollution creates oceanic dead zones. Additionally, the introduction of toxic substances like mercury further threatens aquatic biodiversity. https://cdn.kastatic.org/ka-youtube-converted/nZjMRq9tev8.mp4/nZjMRq9tev8.mp4 282 Effects of humans on ecosystems https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:biodiversity-and-human-impacts/x230b3ff252126bb6:humans-and-biodiversity/a/threats-to-biodiversity 2024-06-12T19:16:42.550703216Z Threats to biodiversity Learn about threats to biodiversity and ecosystems. article https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:biodiversity-and-human-impacts/x230b3ff252126bb6:humans-and-biodiversity/a/biodiversity-loss-and-extinction 2026-04-02T16:52:50.954068474Z Biodiversity loss and extinction Learn about biodiversity loss and extinction. article https://www.khanacademy.org/science/ap-biology/ecology-ap/disruptions-to-ecosystems/a/hs-human-impact-on-ecosystems-review 2021-04-29T08:01:14Z Human impact on ecosystems review article https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/a/earths-changing-climate 2022-08-23T02:49:49.979347426Z Earth's changing climate Review your understanding of climate change in this free article aligned to NGSS standards. article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:aquatic-and-terrestrial-pollution/x0b0e430a38ebd23f:sources-of-pollution/a/point-source-and-nonpoint-source-pollution 2025-08-08T21:39:42.49220884Z Point source and Nonpoint source pollution Define and distinguish point source and nonpoint source pollution. article https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/a/glossary-local-threats-to-biodiversity 2021-04-29T07:59:33Z Glossary: local threats to biodiversity article https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/e/plastic-and-environment 2026-04-10T11:50:42.031414522Z Plastic and environment Lets answer some questions Shankar R exercise https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:relationships-of-organisms-with-one-another-and-with-the-environment/x2a084a90105205d2:effects-of-humans-on-ecosystems/e/deforestation-and-its-impact 2026-04-15T05:40:45.550331962Z Deforestation and its impact Lets answer some questions! Shankar R exercise