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Why Do More Species Live Near the Equator?

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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonate Go to http://Raceforretirement.com and see how the action gap affects you. Follow all of our Peru adventures on this playlist: http://bit.ly/SmartPeru ↓ More info and sources below ↓ Special thanks to Rainforest Expeditions for hosting us! Visit http://www.perunature.com/ References: Wilson, E.O. "The Diversity of Life" http://eowilsonfoundation.org/the-diversity-of-life/ Eichhorn, Markus P. "Latitudinal gradients." Natural Systems: The organisation of life: 249-264. "Tropical Ecology" (textbook) by John Kircher (2011) http://press.princeton.edu/titles/9486.html Condamine, Fabien L., et al. "What causes latitudinal gradients in species diversity? Evolutionary processes and ecological constraints on swallowtail biodiversity." Ecology letters 15.3 (2012): 267-277. Jenkins, Clinton N., Stuart L. Pimm, and Lucas N. Joppa. "Global patterns of terrestrial vertebrate diversity and conservation." Proceedings of the National Academy of Sciences 110.28 (2013): E2602-E2610. Mannion, Philip D., et al. "The latitudinal biodiversity gradient through deep time." Trends in ecology & evolution 29.1 (2014): 42-50. Mittelbach, Gary G., et al. "Evolution and the latitudinal diversity gradient: speciation, extinction and biogeography." Ecology letters 10.4 (2007): 315-331. Wiens, John J., et al. "Evolutionary and ecological causes of the latitudinal diversity gradient in hylid frogs: treefrog trees unearth the roots of high tropical diversity." The American Naturalist 168.5 (2006): 579-596. ---------------- It's Okay To Be Smart is written and hosted by Joe Hanson, Ph.D. Have an idea for an episode or an amazing science question you want answered? Leave a comment or check us out at the links below! Facebook: http://www.facebook.com/itsokaytobesmart Twitter: http://twitter.com/okaytobesmart http://twitter.com/jtotheizzoe Tumblr: http://www.itsokaytobesmart.com Instagram: http://instagram.com/jtotheizzoe Snapchat: YoDrJoe Produced by PBS Digital Studios Music via APM Stock images from SciencePhoto http://www.sciencephoto.com/ and Shutterstock http://www.shutterstock.com
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Text Comments (1171)
Usman Khan (3 hours ago)
He’s so cute I can watch him talk all day
Missed Lethal (10 hours ago)
What was the point of the whole size thing? So it's obvious that duh, 40% of Earth's surface would have the most species? I would think the bigger 60% figure would obivously have more, no?
Taeyeon Kim (11 hours ago)
Thanks to your videos I understand the topic Evolution in English more than when I read the information in the books in German XD
TIlak Sevak (5 days ago)
Am I the only one hearing delayed voice? 🤨
TIlak Sevak (5 days ago)
This episode was way good than expected!!!
aninhapmr (8 days ago)
My favorite channel! Thank you.
fajar adi Pradana (13 days ago)
See spider : Nope! Not; Nope! Moving on! No! Its not a big spider. Ask some Australian. Its not a huge spider.
Srija Deb (16 days ago)
Can you not show spiders? Or at least give a warning? Loved the video though.
Mentes Livres (16 days ago)
It’s ok to make stuff up
JustJesse (18 days ago)
I'm applying for BS Biodiversity for uni and this just made me more excited
* Samantha * (19 days ago)
LOVED the onsite hosting! More would be cool 👍🏼👍🏼
Jacob Klein (24 days ago)
It is because Bolsonaro has blessed those lands!!!!!
Nelly Connor (29 days ago)
what is the animal at 2:35????
Lokendra Nainwal (29 days ago)
Worthful information
1caramarie (30 days ago)
Duh! the closer you get to the North and South Pole the colder it gets. I didn't even have to use my IQ for that.
Meryl Castro (30 days ago)
Hey I have a question, why are planets spherical?
Za Ha (1 month ago)
Cause Science
Aaron Miller (1 month ago)
what is this thing that looks like trumps hair called at 2:35
Alex William (1 month ago)
Bcoz ecuator line in the world is the most nurturing place in earth full of enriched nutrient and minerals required life to survive and grow.This is the place of CRAB
Oscar Fernando Perez (1 month ago)
More sunlight that creates more DNA mutations as well
Simply perfect
ninethreefivesix (1 month ago)
Aw the little bats just chilling. Cuties.
johng jerry (1 month ago)
Liar people cuttings tree down more in the city. I seen alot species in northern Area too.
Scott Anderson (1 month ago)
Centrifugal force
Vitalbra MC (1 month ago)
Very important message about preservation.
Filmon Tewolde (1 month ago)
Warmer temps leads to more green life which, leads more animals.
Alejandro Vizcarra (1 month ago)
Yeah !!!! Perú is wonderful 🙌🏼
Michael Garces (1 month ago)
You look a lot better without glasses.
Jomari Roxas (1 month ago)
Jeremy Backman (1 month ago)
So what if Florida becomes an island chain and New Orleans stops existing , you shouldn't build at sea level.
Jeremy Backman (1 month ago)
Warmer is better. A lil global warming will do things that kick ass , more co2 means more plants , more plants means more oxygen and food , more oxygen and food means more animals. It's pretty simple. Ask the founder of the weather channel .
Tina bintbina (1 month ago)
Thank you.
DoranArtMedia (1 month ago)
I think we're witnessing the evolution of Joes content presentation here (;
Abdarrahman Inamdar (2 months ago)
Green Team BC (2 months ago)
If climate never changed there would not be a rain forest.
Follow justcallme_dell (2 months ago)
Its the urban area
Jakob D (2 months ago)
Most of the roded land is used to feed livestock. We need to stop the vicious cycle by ceasing the age of meat. We're better than this
Sumita Guha Neogi (2 months ago)
Your way of presentation is very very nice...
Rosie Fay (2 months ago)
1:45 That's a grossly unfair comparison. Compare equal areas of land. How many species in, say 1000 km^2 of tropical rainforest v 1000 km^2 of boreal forest?
Mokkari77 (2 months ago)
Werner Herzog on the jungle: "Kinski always says it's full of erotic elements. I don't see it so much erotic. I see it more full of obscenity. It's just - Nature here is vile and base. I wouldn't see anything erotical here. I would see fornication and asphyxiation and choking and fighting for survival and... growing and... just rotting away. Of course, there's a lot of misery. But it is the same misery that is all around us. The trees here are in misery, and the birds are in misery. I don't think they - they sing. They just screech in pain. It's an unfinished country. It's still prehistorical. The only thing that is lacking is - is the dinosaurs here. It's like a curse weighing on an entire landscape. And whoever... goes too deep into this has his share of this curse. So we are cursed with what we are doing here. It's a land that God, if he exists has - has created in anger. It's the only land where - where creation is unfinished yet. Taking a close look at - at what's around us there - there is some sort of a harmony. It is the harmony of... overwhelming and collective murder. And we in comparison to the articulate vileness and baseness and obscenity of all this jungle - Uh, we in comparison to that enormous articulation - we only sound and look like badly pronounced and half-finished sentences out of a stupid suburban... novel... a cheap novel. We have to become humble in front of this overwhelming misery and overwhelming fornication... overwhelming growth and overwhelming lack of order. Even the - the stars up here in the - in the sky look like a mess. There is no harmony in the universe. We have to get acquainted to this idea that there is no real harmony as we have conceived it. But when I say this, I say this all full of admiration for the jungle. It is not that I hate it, I love it. I love it very much. But I love it against my better judgment."
Craig Page (2 months ago)
YonI (2 months ago)
That's because the weather is consistent meaning the rain comes on time there is no time change the sun rises and sets at the same time also oxygen
nana mch (2 months ago)
have you ever feel like you're so proud of yourself after finishing an essay or anything? this video gave me that feeling eventho i'm not the one who made it. THIS IS AN AMAZING VIDEO!!
Pedro Marcelino (2 months ago)
Cool moustache.
Dragomir Ronilac (2 months ago)
It is presumption because we don't know all the spieces. And we overlook things around us being excited by exotic.
Otey Wancho (2 months ago)
Gotta love those facial hair
michael halim (2 months ago)
Too bad almost every country that life near the equator is some shithole country with bad behavior people. Take an example indonesia.
kassie raine (2 months ago)
4:31 There was "A Beautiful Mind" moment thinking about how competition and niches might apply to economic theory.
Camo HH (2 months ago)
Because there aren't Humans!
LOVE OF PLANTS 🌻 (2 months ago)
Speciation is fast in many orchids. They are often extreme specialists and they can propagate intergenerically and produce viable seeds.
Sharmishtha Basu (2 months ago)
Loved it. Your channel is daily diet of nutrition for people like me who love information in easy language.
Hannah Kaye (2 months ago)
In the Philippines we have a lot of species
Mikky Z (3 months ago)
the name of the channel almost makes me wanna barf tho
mradhayuda1 (3 months ago)
I love rain forest. ill die in subtropis area.
Empathy Module (3 months ago)
because it’s warm
0123mandatory (3 months ago)
I Iike how the earth rotates, it really makes my day
WAT (3 months ago)
i want to take ketamine and chill/cuddle with the snow makeup bear at 3:09
xiz0808 (3 months ago)
guy from the Americas that says "niche" correctly!! i am stunned
ttrtoy (3 months ago)
This totally leaves out the human factor. Yuval Noah Harari neatly describes how there was a wide variety of species all around the globe but as humans (or actually their predecessors) only lived in Africa, only those species could adapt to them. The moment humanity went out to the world it ensured the extinction of a high amount of species wherever they went. Australia is a great example for this due to our late arrival there...
Winner Minner (3 months ago)
Tambopata National Reserve, Peru A breathtaking tropical rainforest located between Cuzco and Bolivia, the Tambopata National Reserve in the Peruvian Amazon is one of the world’s most biologically diverse areas. Nearly one-third the size of Costa Rica, Tambopata has more species of birds (595) and butterflies (more than 1,200) than any place of similar size on earth, reported The New York Times. "Environmentalists claim that the [reserve's] great diversity of wildlife is due to its location at the confluence of lowland Amazon forest with three other ecosystems," according to an article in the Times. "At least 13 endangered species are found here, including the jaguar, giant otter, ocelot, harpy eagle, and giant armadillo." The reserve is also home to the world's largest known mineral clay lick, where hundreds of parrots and macaws of up to 15 species congregate daily to ingest the detoxifying clay.
Antonio Maria Schiavo (3 months ago)
Very good video!
Rai (3 months ago)
The first time i saw a picture of Arizona at sunset and what hour it was shocked the little me 😂 I've lived in central America all my life
J. • (3 months ago)
I feel like I was taught about this on a smaller difficulty level in middle school I just don’t remember
Harsimran Singh (Dino) (3 months ago)
Thank you for the video.
Henry Fuentes Riccardi (3 months ago)
Technology kills Nature, it is importante to keep mining, and oil companies away from the Amazon. Of course that is just my opinión, because the jungle Will get exploited no matter what.
Gel g (3 months ago)
Why would anyone thumb down this amazing video?
matthew houlihan (3 months ago)
Frosto32 (3 months ago)
Evolution is a belief system. It went from scientific investigation to an adopted lifestyle lol but they don't realise it.
WhyteLis21 (3 months ago)
The real question here is will evolution by the tropical equator give us super powers? 😁
Mine Crafter (3 months ago)
So, if i live next to the equator i can turn into a chicken quicker? Cool! im moving house!
Lord Skeptic (3 months ago)
Because there is more land (if you include the seabed)
Jonathan Ryals (3 months ago)
Because the equator is the longest line of latitude. The poles are single points. How about which section of longitude has the most species?
Caklutfi (3 months ago)
Now i know why there are 300 milion people in indonedia
Rafael Vargas (4 months ago)
Great video! I wish he would have talked a little more about the differences on the metaphorical views of the tropics as a “cradle” vs “museum” both are fascinating, they share similar views but are different from each other.
Dispose Able (4 months ago)
Because it is warm and moist.
Maha Rajan (4 months ago)
Because no whites
eric taylor (4 months ago)
Why would anyone thumbs down this. Hate learning?
Paola Sanchez (4 months ago)
Amazing channel! I just discovered it and I’m very excited with all the content! Really well done and interesting!
psychedelic psychonauts (4 months ago)
energy field, electromagnetic field of the earth from north pole to south pole meets at the equator... the merging of all duality ( hot - cold, positive - negative, feminine - masculine etc ) reach the point of equilibrium and the harmony creates living organisms... that's why the first live form, the first civilisation must came from the equator and spread out from there...
Clint Wolf (4 months ago)
Terrific, very interesting video,
mahesh debata (4 months ago)
Nëutt Matthew Nord (4 months ago)
He looks like finn btw.
Anubhav Yadav (4 months ago)
very nice effort
Traste Silvestre (4 months ago)
Seriously your channel is the best of YouTube! Every single video is just incredible!!!
josie jesie (4 months ago)
because its warm. because of that, useless creatures born. like stupid people. stupid useless people. like me and other hundred of millions of asian.
Blazing X (4 months ago)
Abbz Malik (4 months ago)
Beautiful video amazing stuff
Archerubi (4 months ago)
this video makes me cry
donn patez (4 months ago)
The amazon is a true natural lab.
RED REBEL (4 months ago)
Am I the only one that thinks he's hot AF
kashmir daily (4 months ago)
Makes people smart..
EVIL Co. (4 months ago)
Because of the "Sun".
Kai Øveland (4 months ago)
Thanks for the series. I have been in the rainforest at Tambopata in Peru. A relay great place to experience the jungle and its life. Even in the rain season it was sun every day. Keep a good repellent on you and take some antidote(medic) before venture there. Trees smells like garlic, silent sunset, wake up call from howling apes, crickets sounds like chainsaw.. Btw the grey tarantella (2,12 min. in the video) is huge but not poisonous.
Brexit Refugee (4 months ago)
Centrifugal forces drag them all down from the poles obviously.
Amaya Køhler (4 months ago)
master chief (4 months ago)
thats why india is very populated sorry for my bad english 😂🙏
Collab Comm (4 months ago)
Because white people don't live there
Aditya Chaudhary (5 months ago)
so amazing video :o
Daniel Samper (5 months ago)
This dude is way too pasty to film in the rainforest LOL
Rutwik Navalgund (5 months ago)

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