## Unit: Ecology

### animal communication
https://cdn.kastatic.org/ka-youtube-converted/1kbZ1JAoi5o.mp4/1kbZ1JAoi5o.mp4

### animal behavior foraging
https://cdn.kastatic.org/ka-youtube-converted/OrCoshLAOiQ.mp4/OrCoshLAOiQ.mp4

### organism life history and fecundity
https://cdn.kastatic.org/ka-youtube-converted/mAdUjImDx58.mp4/mAdUjImDx58.mp4
https://cdn.kastatic.org/ka-youtube-converted/mAdUjImDx58.mp4-low/mAdUjImDx58-low.mp4

### flow of energy and matter through ecosystems
https://cdn.kastatic.org/ka-youtube-converted/TitrRpMUt0I.mp4/TitrRpMUt0I.mp4
https://cdn.kastatic.org/ka-youtube-converted/TitrRpMUt0I.mp4-low/TitrRpMUt0I-low.mp4

### impact of changes to trophic pyramids
https://cdn.kastatic.org/ka-youtube-converted/sV-KQ91Fnck.mp4/sV-KQ91Fnck.mp4
https://cdn.kastatic.org/ka-youtube-converted/sV-KQ91Fnck.mp4-low/sV-KQ91Fnck-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/sV-KQ91Fnck.mp4-low-ios/sV-KQ91Fnck-low-ios.mp4

### exponential and logistic growth in populations
https://cdn.kastatic.org/ka-youtube-converted/KyAKEisg2PQ.mp4/KyAKEisg2PQ.mp4
https://cdn.kastatic.org/ka-youtube-converted/KyAKEisg2PQ.mp4-low/KyAKEisg2PQ-low.mp4

### density dependent and density independent population regulation
https://cdn.kastatic.org/ka-youtube-converted/6IS_M6CX7FE.mp4/6IS_M6CX7FE.mp4
https://cdn.kastatic.org/ka-youtube-converted/6IS_M6CX7FE.mp4-low/6IS_M6CX7FE-low.mp4

### population growth rate based on birth and death rates
https://cdn.kastatic.org/ka-youtube-converted/R2yPeLJsPOo.mp4/R2yPeLJsPOo.mp4
https://cdn.kastatic.org/ka-youtube-converted/R2yPeLJsPOo.mp4-low/R2yPeLJsPOo-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/R2yPeLJsPOo.mp4-low-ios/R2yPeLJsPOo-low-ios.mp4

### per capita population growth and exponential growth
https://cdn.kastatic.org/ka-youtube-converted/B_qsI4Q1nNk.mp4/B_qsI4Q1nNk.mp4
https://cdn.kastatic.org/ka-youtube-converted/B_qsI4Q1nNk.mp4-low/B_qsI4Q1nNk-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/B_qsI4Q1nNk.mp4-low-ios/B_qsI4Q1nNk-low-ios.mp4

### logistic growth versus exponential growth
https://cdn.kastatic.org/ka-youtube-converted/jfIPQ5_71Mc.mp4/jfIPQ5_71Mc.mp4
https://cdn.kastatic.org/ka-youtube-converted/jfIPQ5_71Mc.mp4-low/jfIPQ5_71Mc-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/jfIPQ5_71Mc.mp4-low-ios/jfIPQ5_71Mc-low-ios.mp4

### interactions between populations
https://cdn.kastatic.org/ka-youtube-converted/q2zdiLn3gSE.mp4/q2zdiLn3gSE.mp4
https://cdn.kastatic.org/ka-youtube-converted/q2zdiLn3gSE.mp4-low/q2zdiLn3gSE-low.mp4

### predator prey cycle
https://cdn.kastatic.org/ka-youtube-converted/NYq2078_xqc.mp4/NYq2078_xqc.mp4
https://cdn.kastatic.org/ka-youtube-converted/NYq2078_xqc.mp4-low/NYq2078_xqc-low.mp4

### exploring ecosystems tropical rainforest diversity california academy of sciences
https://cdn.kastatic.org/ka-youtube-converted/LHPuo0rwM1w.mp4/LHPuo0rwM1w.mp4
https://cdn.kastatic.org/ka-youtube-converted/LHPuo0rwM1w.mp4-low/LHPuo0rwM1w-low.mp4

### simpsons index of diversity
https://cdn.kastatic.org/ka-youtube-converted/bfxhh7l-LQw.mp4/bfxhh7l-LQw.mp4
https://cdn.kastatic.org/ka-youtube-converted/bfxhh7l-LQw.mp4-low/bfxhh7l-LQw-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/bfxhh7l-LQw.mp4-low-ios/bfxhh7l-LQw-low-ios.mp4

### biodiversity ecosystems and ecological networks
https://cdn.kastatic.org/ka-youtube-converted/-bE-Pydad7U.mp4/-bE-Pydad7U.mp4

### exploring ecosystems tropical rainforest diversity california academy of sciences
https://cdn.kastatic.org/ka-youtube-converted/LHPuo0rwM1w.mp4/LHPuo0rwM1w.mp4
https://cdn.kastatic.org/ka-youtube-converted/LHPuo0rwM1w.mp4-low/LHPuo0rwM1w-low.mp4

### mutation as a source of variation
https://cdn.kastatic.org/ka-youtube-converted/LZCE-4q5f9c.mp4/LZCE-4q5f9c.mp4
https://cdn.kastatic.org/ka-youtube-converted/LZCE-4q5f9c.mp4-low/LZCE-4q5f9c-low.mp4
https://cdn.kastatic.org/ka-youtube-converted/LZCE-4q5f9c.mp4-low-ios/LZCE-4q5f9c-low-ios.mp4

### introduced species and biodiversity
https://cdn.kastatic.org/ka-youtube-converted/J-ftiWffNTc.mp4/J-ftiWffNTc.mp4

### human activities that threaten biodiversity
https://cdn.kastatic.org/ka-youtube-converted/2RC3Hsk90t8.mp4/2RC3Hsk90t8.mp4

### how does climate change affect biodiversity
https://cdn.kastatic.org/ka-youtube-converted/XFmovUAWQUQ.mp4/XFmovUAWQUQ.mp4

### how did dinosaurs go extinct
https://cdn.kastatic.org/ka-youtube-converted/mCKeogDioWE.mp4/mCKeogDioWE.mp4

### dinosaur decline
https://cdn.kastatic.org/ka-youtube-converted/cgGnvH0Ozvk.mp4/cgGnvH0Ozvk.mp4
