Ecosystem Ecology: Links in the Chain - Crash Course Ecology #7

[@purple8990]

Hello, fellow classmates, and welcome to your homework.

[@landonbodynskyo4160]

edgy much

[@MiguelAngel_-ue1bm]

Thank you.

[@pinkhoney6702]

im doing this for school im actually ready to find my teachers house and throw hands

[@kennedibrown1643]

that_one kid i feel that

[@scotthodges6610]

i swear, no one actually searched this up and were all doing this for school

[@pyro4497]

Lol yeah

[@kiryukazuma8089]

Keeps these old videos alive lol

[@jacemeulensteen5698]

Fact

[@y_darkstalker2372]

Um if y’all are also doing this for school, does anyone know when he defines ecosystem ecology?

[@laurenbarsotti7602]

He talks to fast for me. I had to watch this over 5 times just to understand the first five minutes of

[@halftimechrome1229]

Or put on the captions

[@pocok5000]

I need a t-shirt with "Just because we are familiar with a concept does not mean we actually understand it" printed on it.

[@dotti1356]

I just wanted to say thank you Hank and the Crash Course team. I've used most of your videos as a study tool for my college Biology class. They've really helped me a lot.

[@parkershaw8600]

my science teacher played this in school yesterday. LIFE COMPLETE.

[@GarethField]

Both thinking of introducing this to my favorite teacher from HS and super stoked that he mentioned jamiroquai!!!!

[@zislandsurvivor138]

me not noticing this was 6 years ago

[@silvahedgehog]

ZIslandSurvivor congrats

[@user-pv1kt7qq8d]

Hank... for my peace of mind.... please.... BREATHE

[@moongem4489]

Great. I will be spending the next few days trying to come up with my own definition of pop music without using a dictionary

[@blackpearlstay]

5 years ago, I came here during my undergrad need a crash course, left a comment, and left. 3 years ago, I was during my masters and needed a refresher and watched this again. I also left a comment and left:DNow I'm doing a PhD in food webs and am back here again. Am I just enjoying this video or have I just not learned anything in 5 years? I don't know. Let me see if I'll come back in 2025 when I should be a Dr. lol

[@curiousfirely]

Coming from an Ecosystem Ecologist, that was a Great explanation of the basics. Thank you Hank for a great resource for my students!

[@TheFireflyGrave]

If there were an owl that ate hawks, that would make for the greatest KZbin video of all time.

[@hawkxz295]

me : *asks a doubt to the ecology teacher* the ecology teacher, who doesn't know the answer or doesn't want to answer : 6:59

[@aaditnistala7023]

6:39 Since when did squirells and fish eat bears?

[@PossumNZ1]

I am binge watching this series 2 hours before my exam, dammit.

[@TheTonyKono]

The quality of this channel amazes me. I've showed it to numerous professors of mine, and they all love it. Many of them have even taken to using it in lectures on occasion

[@MrBomasBalloons]

The arrows in your food web (6:40) are pointing the wrong direction. Arrows should point from what is being eaten to what is eating it… just as the energy flows.

[@cannonfodder8907]

+Mr. Boma's Balloons no he did it right i live near a forest and today i saw a squirrel eat a bear

[@caroldeniselester8671]

+Mr. Boma's Balloons . The arrow means is eaten by

[@adityaguin4913]

+awsomenamehere No, it's wrong because berries don't eat the bear its vice versa and the arrows don't show that correctly

[@adityaguin4913]

Ok I am sorry...didn't realize you were joking....my sincere apologies awsomenamehere

[@cannonfodder8907]

@110952318197591168690 really? you thought i saw a berry eat a bear? *sigh* fine apology accepted but seriously that was dumb af

[@zins_9122]

Who rules the world? Wait for it.....The Mongols!!! . . . Oh wrong subject

[@dr.thaddeusxyank7177]

almost a century ago it was almost hitler

[@MiguelAngel_-ue1bm]

And about six centuries it was the Spanish Empire.

[@PMartinez55]

Crashcouse, thank you. I'm a senior in high school and taking AP Environmental Science. I read the book and listen to the lectures, but these videos definitely help reinforce what the concepts. I'm actually starting to look forward towards the exam in May!

[@a.desousa]

I only occasionally comment stuff on youtube. And I never wrote something like "I Love what you guys do!". Well anyway: I Love what you guys do! Concise, very fine with many different topics summarized in a captivating efficient way. As a scientist myself I think your videos are of great use as a general "textbook" approach to the field of ecology not only for the use of students, but teachers and researchers alike. As a youtuber myself, I hope these type of videos might help presenting the natural sciences field in a more, interesting, funnier, "easier to understand" way so we can use the incredible knowledge we are able to generate, in a more efficient societal way.

[@TheNinja1111]

I wish things like this would be played on TV in place of 'news' emphasizing all the violent happenings in the headlines 24/7, in turn likely leading to more violence. Think about how much better a state we'd be in. Just a thought. Also, thank you Hank!

[@SophieIsAGirl]

My teacher linked this video to us to watch for my Biology class. I think my bio class will be awesome!

[@annanguyen9231]

Wow... I learnt so much more in this video than all the lessons I had at school -__-

[@flickybear33]

Bioaccumulation is actually the amount of a pollutant accumulated by 1 organism. Biomagnification is when a pollutant moves up the food chain getting progressively larger in quantity in each organism as it rises in trophic level (what Hank described with the mercury), easy mistake though ! :) yay for learning!

[@BETANCURPOSADA]

You prepare this videos better than most of my University teachers prepare their classes. Cngratulations for that!

[@nuclearshill]

everybody gangsta until the intro is 1:30 in

[@jonpro15]

When I set the speed to .5 .. kind of sounds like you're doing a Cosby impression lol

[@nikhalbhola4859]

sounds like he is drunk

[@troysmith7397]

And if you play it at .75 speed, he sounds NORMAL

[@salmarahman3241]

Very helpful especially for my exams and I thank that

[@kevindawe1019]

Great job! A very informative and enjoyable summary. Thank you.

[@kevinwalters3191]

What is it called when an animal is even higher than quaternary. Grass -> Grasshopper -> Mouse -> snake -> hawk -> owl.

[@PARVSHAH-ppsu]

Thank you for this amazing lecture.

[@ryandowning446]

this video is great, ill be watching them all semester. much appreciated to the people/person that made the video.

[@oliviakompany4739]

Thank you for helping me with my science test!!!!!!!

[@MariusMuntean]

This was one of the better videos, in my opinion at least. I really liked how you made the argument of being better to eat from the lower food chain. It never occurred to me that the toxicity rises as you go up the food chain(this is how I understood bio-accumulation). Does this mean that humans are toxic or would be toxic for an animal which would primarily consume humans?

[@photogallery94]

My brother isn't doing very well in his 9 grade science classes, and I wasn't the best science student. This is supremely helpful. Thank you so much!

[@TheBirdiebnd]

Hank, thank you so much for discussing bioaccumulation (biomagnification). I wrote a lengthy review article on methyl-mercury in Aquatics ecosystems and how it travels and influences each level in the food web. It is a complicated idea that I have had to explain to many of my students many times, but it is an important concept. Like birds of prey and wolves, etc., humans are also a top predator, and this is a major health concern as well as a major environmental concern. Thank you!!!

[@ianhellam4826]

try watching it with 2 speed. it sounds like he's on a sugar buzz.

[@evaander]

All i wanna do is study animals 😭 why are there so many types

[@Vortex1000]

awwwww xDDDD

[@bobguy6046]

Or I wanna study animals and there are so many types to choose from

[@chloehannah417]

Wow I just wasted a whole term reading about this when I could’ve just watched a 10minute video

[@KAPTKRUNCHitize]

Bioaccumulation. Everything has a name but TIL. Thanks Crash Course!

[@tobsvonmittelstraum2300]

I hope these guys won't stop. Because if they don't, I'm going to follow them for years.

[@lilywendt4173]

My science teacher shows these to us and it's wonderful.

[@cs-wildcam]

Thanks bud I love these videos! I’m a safari guide in South Africa and this really helps me to gain a better understanding of all the cool stuff around me!

[@dannyhayward4650]

I'm studying at university and this has helped me MASSIVELY to remember certain things, thank you!

[@natureman494]

its things like this that made me major in wildlife biology the vast complexity of how ecosystems interact with other ecosystems

[@gabriel38g]

Sardines never sounded so delicious. And the definition of pop music is: "simple rhythmic sounds relatively pleasing to those not concerned with quality, subject matter or talent" Alternative definition of pop music: "No edge!"

[@ME24saken4u]

I'm totally going to ring people's doors and tell them their ecosystem is stupid.This is going to be so much fun :D

[@MrBatman201]

helping me get A's in my class all semester, teach it way better then my teacher thanks.

[@BrotherAlpha]

I would love to see an episode about more unusual ecosystems, like the ones that don't get their energy from the sun.

[@clayfike9405]

0:21 I could name all those! You would have to specify one that I do understand, but I could!

[@tejolson92]

I read in quite a few places that the mercury in the water is changed from a non toxic compound to a toxic compound.

[@harrySTINKINpotter]

I played "Hanks Face" while watching this. It works surprisingly well.

[@400vip]

Not sure if you got a response: -Ecology looks more into the interactions between organisms and other organisms and environmental factors, and ultimately how they influence each other. -Environmental science is the term used to describe how all biological and physical sciences work together as a system. The scope is huge: some of the basic things that tend to be included are biology, geology, oceanography, meteorology, ecology, even economics. The real difference between two is the scope.

[@isntitswiftscenes4857]

who else is here for biology

[@Yerrik]

I should modify that statement with an introduction -- "I love this series! And..."

[@seabassdarapper]

I really love when john talks to his younger self. Not many people are so willing to admit their youthful ignorance.

[@nickd02]

Thanks a ton for posting this! It helped so much on my homework!

[@rougevexy8848]

the funny thing is your 20+ now and im a teen this is you 5 whole years ago

[@nickd02]

@@rougevexy8848 I'm 17 now, and I don't really understand why I was learning this when I was 12

[@austinlupo7099]

Here 6 years later and your videos are still amazing. BTW I love you in westworld.

[@masieldlc12]

"those animals that eat the stuff that none of us would touch with a 3 meter pole" XD

[@luckymatlou6783]

Thank you for the video please continue making more and also exciting... i really do appreciate it.

[@weshard1]

Cheers! This gave me a far better way of explaining how toxicity increase as you go up the chain.

[@brianarodriguez5613]

NO EDGE. I love when they make references to other vlogbrother videos. =)

[@chubbard78]

I loved the pop music and magic eye poster references!

[@TheMunamiKid]

I noticed hank said "3 metre pole." That coupled with a few instances where I've noticed John refer to football as "football" instead of the normal North American use of "soccer" leads me to believe the Green brothers are Europhiles :)

[@danchucky-pay2385]

You are an incredible person. God bless you Master of Biology. :B Thank you for doing this the easiest way to learn more about ecology.

[@t4g3d]

Not all organisms that are autotrophs photosynthesise. There are some which perform chemosynthesis, usually small bacteria that gain energy by breaking molecular bonds and collecting the energy released.

[@dr.thaddeusxyank7177]

this review helped me a lot, thanks man, you a lot of D class lives

[@Kotherful]

No stream is an island made me smile.

[@lifeofkena]

X1.25 for the speed and it’s easier and faster to go through.

[@TheBlackrose1989]

I hate science almost as much as I hate math. I am, unquestionably, a literary and history nerd. Put simply, John's Crash Course contributions pwn me. And, yet, every time there's a new Crash Course Science, or Sci Show vid, I force myself to watch them, to be attentive and absorb the information given. Thank you, Hank Green, for making me learn, even when I don't wanna.

[@kitsunegirl9996]

Wow, I didn't know that berries eat bears! Or that salmon eat bears! It's been commented before but the food web's backwards, the arrow's supposed to point to the thing that's doing the eating, not the thing getting eaten.

[@jamesmarschka7321]

Correct, I noticed that as well!

[@aidenburns1297]

Yep noticed that too.

[@jakethespaceman9896]

Watch out for poop it will eat us all

[@goode612]

I know you were being sarcastic but why did it sound mean to me

[@ZoggFromBetelgeuse]

(3) --> There is a second argument against your hypothesis. I asked some earthlings what they think about cannibalism. Most of them didn't say it's "evil", but that it's physically disgusting. Some produced even facial expressions not unlike spitting out food. According to my field research, physical disgust usually hints at sanitary problems (like eating mud) or sexual non-preferences (like having sweet love with a squid), not ethical problems or group-preserving mechanisms.

[@SomeExtraNotes]

Sometime pop is a genre within all popular music and is short for bubblegum pop. This genre is mostly defined by what it's not. It isn't rock, country, hip hop, jazz, but it's still clearly popular music.

[@SomeExtraNotes]

Pop music is generally describing a line between so called 'art' or classical music, functional music (liturgical and educational), and the music that is consumed by the large masses. Much of the old music that we now consider classical was once pop much including most operas. Much like ecosystems the lines are often blurry and ill-defined.

[@DoeiDenise]

So happy I understand the NO EDGE reference ^.^

[@chibeni]

My teacher's forcing us to watch this as a part of a five-page assignment... not sure if I should be happy or not

[@sjwimmel]

The Magic Eye thing is hard!! I think I have it though: There's a horizontal/vertical cross which is medium distance. Then at the top left there's a 'mountain'. At the top right there's a 'valley'. Bottom left is another valley. And at the bottom right there's a circle that's so close it scares you the first time you see it :-P

[@Ront1313]

ecosistem ecology test tomorow! hank you are awesome!

[@DailyVikings]

Anybody else find this more useful than their lecture?

[@carerumer501]

The process Hank described as bioaccumulation is actually biomagnification, bioaccumulation is the build up of a pollutant in an organism over time.

[@blackpearlstay]

NO EDGE* * applies to space and ecosystems, according to Hank Green

[@jeebersjumpincryst]

i heard the mercury is what gives the tuna their lustrous silver shine, and also adds to their scrummy flavour

[@EllenOConnorRK]

I really, super thoroughly enjoyed this. Thank you.

[@fmahdi7454]

I finally understood, you are talented. Thank you for your help!!!

[@ZoggFromBetelgeuse]

(2) --> If it's a separate mechanism, it's strange. The problem with being killed and eaten is, obviously, the "being killed" part - once you are dead, it's secondary if you're eaten or buried. So I wonder why earthling evolution developped a "don't eat each other" mechanism instead of a "don't kill each other" mechanism. But the mechanism may have developped much earlier in the evolution of animals in order to prevent predator from self-extinction - a "don't hunt each other" mechanism. --> (3)

[@remuladgryta]

Interesting point! Assuming that by earthlings you mean the most widespread of the planet's primate species (or any other earth species that live in colonies), the toxin accumulation hypothesis is an appealing one, however, let me offer an alternative hypothesis: They all (most at least) seem to have managed to enter a pact in wich they agree to not eat each other in exchange for not being eaten. For non-social animals, the cost of combat might be the prevalent factor. I welcome your criticism.

[@pakturkdostlar5309]

please do a video on Ecological Energetics Thanks :)

[@victorianicholson3963]

Thank you for making this video! (: It really helped me out with Biology! (:

[@TheSecondarkhan]

Hello:)

[@unvergebeneid]

Rrriiight, because when you look at the earth with a thermographic camera, it looks warm at night and cool on the day side.

[@codemonkeyslikeme]

these vids on ecology should be 20 min long, so fascinating

[@otmrs]

A small note: Most professional ecologists draw food chain / web arrows in the direction of energy transfer, not who is eating whom. So the arrow should go from the fish to the bear because that's the direction of the energy flow.

[@RDF2552]

The asymmetry of your shirt drove me insane… But thanks for being awesome in, like, everything else!

[@liampenny9077]

Hank, you sir are amazing :) Thanks bro

[@topumasum]

I've got a major crush on this dude.

[@morgannafinnick8409]

Could you please create a video based entirely on symbiotic relationships?

[@lozzawillow3359]

thank you so much hank and the crash course team, i watched your videos during GCSE's then again in my A levels before covid stopped us from sitting the exams, and now i sit here editing my dissertation for my uni degree. thank you so so much for being quicker and better at explaining stuff than half of my teachers. i wish you all the best! :D

[@BlindSpectet]

i was 3 when this video released... THREE

[@seankylemaitim8367]

How does he speak so fast without water

[@bam3344]

Hello welcome to your revision guide