Some Animals Are More Equal than Others: Keystone Species and Trophic Cascades

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  • Опубліковано 21 січ 2025

КОМЕНТАРІ • 366

  • @merubindono
    @merubindono 7 років тому +614

    Me: *looking at starfish* are you a keystone specie?
    Starfish: no this is Patrick

    • @oliviaso9726
      @oliviaso9726 5 років тому +6

      LOL SPONGEBOB

    • @andrewrodriguez3712
      @andrewrodriguez3712 5 років тому +12

      @Tofu Kingpin you literately predicted the future of youtube comments/memes considering this is a 2 year old comment
      By using the
      Me:
      someone else:
      format

  • @avabbeeeee
    @avabbeeeee 4 роки тому +255

    3:37 green world hypothesis (def.)
    13:40 trophic cascades (def.)

  • @annika2041
    @annika2041 4 роки тому +564

    anyone else looking through the comments procrastinating your work?

  • @kylap8961
    @kylap8961 4 роки тому +780

    this homework at home is not the move anymore

  • @cececramer750
    @cececramer750 4 роки тому +94

    i spent 20 minutes reading the comments and forgot to watch the video

  • @ramennoodles8774
    @ramennoodles8774 4 роки тому +64

    Watch at 1.75 or 2x speed. It's gonna help you a lot if you're doing this for school ;)

  • @MrAshton
    @MrAshton 4 роки тому +163

    He looked so proud of him self when he said "I changed the nature of the system"

  • @Leoneidas
    @Leoneidas 2 роки тому +28

    Sean and these Biointeractive pieces are amongst the best quality anywhere. So well done.

  • @christophercook7442
    @christophercook7442 6 років тому +43

    As a former student of Dr. Estes’ wife, I was very familiar of their orca research (although in 2001 the phrase “trophic cascade” was not used).

  • @YoungSinger17
    @YoungSinger17 2 роки тому +10

    With All honestly, I am glad to be watching these videos, as they are quite informal, I enjoy watching them repeatedly, & I somehow do not grow bored of any of the videos! They work well as video assignments, as long as the right questions are asked!

  • @44VW44
    @44VW44 3 роки тому +21

    It makes me feel despair that so many people have lost or never had a connection to Nature. While this video has lots of facts that are “dry” relative to the experience of being in Nature. The research does provide clues on how to reverse losses of endangered species.

  • @samis13git26
    @samis13git26 4 роки тому +38

    Bro this virus and staying home is getting to my head

  • @carrieannnaumoff5594
    @carrieannnaumoff5594 7 років тому +16

    Wonderful - clear and easy to understand for my 5th grade students, yet full of profound information from two wonderful scientists. Great film. The students were absolutely fascinated.

  • @SHZpai
    @SHZpai 5 років тому +73

    Wait so one man killed an entire ecosystem right?

    • @yungcunt1717
      @yungcunt1717 4 роки тому +3

      Yes 🥺🙏

    • @sogsmcgee2183
      @sogsmcgee2183 4 роки тому

      Ye the tide pool kinda got rekt by mussels.

    • @imhereforkaisa1555
      @imhereforkaisa1555 3 роки тому +1

      on the bright side, his subsequent results gave us knowledge about the topic so we know what to avoid now

    • @olgierdvoneverec4135
      @olgierdvoneverec4135 3 роки тому +2

      No, he did it in a single rock, and didn't kill it, only changed it.

    • @saris_2194
      @saris_2194 7 місяців тому

      It was only on a section of it. The ecosystem surely recovered after he stopped removing the stars

  • @WilsonRobertB
    @WilsonRobertB 5 років тому +10

    Leopold described the trophic cascade in his essay "Thinking Like a Mountain" before any of this work was done. What is impressive, is how well Paine and Este's work empirically validates Leopold's anecdotal description.

  • @dannylim834
    @dannylim834 3 роки тому +43

    ecologist Robert Paine has passed away on June 13, 2016. This is around seven weeks after this video was posted. Rest in peace, star thrower 😔

  • @coolestone28
    @coolestone28 4 роки тому +70

    The answers to some questions
    Green World Hypothesis: The world is green because predators keep herbivores in check.
    Keystone Species: a animal that were removed from a ecosystem would effect on the ecosystem as a whole
    Trophic Cascades: Trophic cascade is when you have an apex predator controlling the distribution of resources, and they lead to these cascades of indirect effects lots and lots of indirect effects
    Hypothesis and Experimentation: Killer whales eat otters. a place called Clam Lagoon. It provided us a site that orcas could not get to. We had no problem catching about 30 animals in two or three Days. And the fact that that little population did not decline when everything else did the orcas

  • @mexicansnorlax909
    @mexicansnorlax909 2 роки тому +13

    Am I the only one who hates to watch these when you have hw but loves to watch it on my own time

  • @greatlife1047
    @greatlife1047 4 роки тому +7

    "All animals are equal but some are more equal than others"
    The title reminded me of the quote from Animal Farm.

  • @cassied9327
    @cassied9327 4 роки тому +9

    I love hhmi biointeractive, I wish I had them on TV when I was growing up. I was fortunate to have Eyewitness (shows and books). Happy to have these videos now!

  • @IchaMufti
    @IchaMufti 9 місяців тому +2

    i forgot that it was homework, mindblowing as hell. ecology and nature just too beautiful to handle

  • @kCuFfication
    @kCuFfication Рік тому +5

    I wish all my ecology lessons were this interesting. Why can't they be??

  • @TKEYLER
    @TKEYLER 2 роки тому +2

    Excellent resource - using this in my ecology class this week. thanks

  • @rextlfung
    @rextlfung 5 років тому +7

    What a lad. Does all the labor work himself. Truely passionate scientist.

  • @MidasCat
    @MidasCat 4 роки тому +75

    school, anyone?

  • @dristamiko
    @dristamiko 3 роки тому +16

    the people who created this wondering why the views are going up dramatically:

  • @kd8249
    @kd8249 4 роки тому +163

    Who here for online school?

  • @audreysakamoto5388
    @audreysakamoto5388 4 роки тому +40

    who would watch this in there free time i'm only here from school :(

    • @TheTypicalGinger
      @TheTypicalGinger 4 роки тому

      School is bad....

    • @kirancox6123
      @kirancox6123 4 роки тому +6

      its actually really interesting
      and some people are interested in things like this
      but yes I am here from school

    • @ll-uj5yx
      @ll-uj5yx 4 роки тому

      @@kirancox6123 u sound smart what is a community

    • @imhereforkaisa1555
      @imhereforkaisa1555 3 роки тому

      i thought it was really cool

    • @harkiratrandhawa4941
      @harkiratrandhawa4941 3 роки тому +1

      @@ll-uj5yx all populations in a specific area

  • @frankkolton1780
    @frankkolton1780 3 роки тому +6

    I'm not here because of school work or assignment, I'm here because like many people, I enjoy learning and increasing my knowledge of the world around me, bettering myself so I can make better informed decisions on how I live and how I vote to live.

  • @JoshuaDunn-oi8ye
    @JoshuaDunn-oi8ye 10 місяців тому

    ngl the prof asking what makes the tree green and the answer being top down regulation is the best description of the kind of trick questions college throws at you.
    Also my third time watching this vid in my bio major.

  • @alexandroskaminas
    @alexandroskaminas 8 років тому +10

    Spectacular! ecology is truly amazing, especially marine ecology!

  • @simyian9932
    @simyian9932 7 років тому +15

    8:05 there is a quote by Animal farm James orwell

    • @nqs2362
      @nqs2362 5 років тому +4

      george

    • @whatabouttheearth
      @whatabouttheearth 4 роки тому

      *George Orwell
      And here is a 1984 refference (the t shirt) 😄:
      ua-cam.com/video/b9xVEeYAs3w/v-deo.html

  • @user-cr7ln9mg1t
    @user-cr7ln9mg1t 6 років тому +29

    "Animal Farm" reference in the title not intended, I assume?

    • @bw1170
      @bw1170 5 років тому

      Hung Nguyen
      The video *is* about animals after all

    • @corydalton7135
      @corydalton7135 5 років тому +2

      It was intended as stated in his book the Serengeti rules.

    • @hollypotthoff2337
      @hollypotthoff2337 5 років тому +3

      The Animal Farm reference is VERY MUCH intended for this video. Scientists have discovered that certain animals are the major controls for the health of the ecosystem they live in, and are therefore considered keystone species. With this in mind, it is now a fact; some animals really ARE more equal than others, and their ecosystem will literally perish without their existence.

    • @Valor708
      @Valor708 4 роки тому

      it's intended

    • @kaylynpamon
      @kaylynpamon 4 роки тому

      nice catch😭

  • @inspiringer6418
    @inspiringer6418 5 років тому +28

    I'm doing this for homework but the teacher didn't give us the link so I found it myself. He said it is due tomorrow which is odd I guess.

  • @CesarGarcia-ru8hr
    @CesarGarcia-ru8hr 4 роки тому +5

    I'm gonna take a notebook to some forrest and start chucking squirrels and call it an experiment.

    • @krazieorigami
      @krazieorigami 3 роки тому +1

      i've tried this, they bite and get upset

  • @alejandrotorres1191
    @alejandrotorres1191 3 роки тому +4

    do not procrastinate, the video is interesting, Don't do it just because it's a homework, do it because you're curious about it. Don't waste time doing something you don't like.

  • @bringbackplutonsp
    @bringbackplutonsp 3 роки тому +5

    Jesus Christ these students in the comments are garbage. You can't watch a 20 minute video but ya'll spend hours on tiktok? This video showcases THE pioneer in intertidal ecology and an immensely important concept. Show some respect.

    • @msh3l518
      @msh3l518 2 роки тому

      iskit ya dayoooooth

  • @connorcallahan6154
    @connorcallahan6154 4 роки тому +37

    POV: you don't want to be here

    • @jr_2810
      @jr_2810 4 роки тому +3

      Shhhhh, keep it down, they'll find out

  • @tallarinverd3
    @tallarinverd3 5 років тому +9

    beautiful! such an important discovery!

  • @alltimeorphan
    @alltimeorphan 4 місяці тому +1

    here for school. this was actually very interesting thanks.

  • @EmeraldOnSwitch
    @EmeraldOnSwitch Рік тому +2

    Watching this in class

  • @kyleegorecki541
    @kyleegorecki541 4 роки тому +44

    Biology students here cuz of coronavirus lmao.

  • @darklingeraeld-ridge7946
    @darklingeraeld-ridge7946 5 років тому +4

    Excellent. And so much follows from this, that is unsaid. Not least that we should tread lightly.

  • @gabriellacheetham7120
    @gabriellacheetham7120 5 років тому +31

    honors biology?

  • @chrislecky710
    @chrislecky710 2 роки тому +3

    A key stone species is a human concept for what is being observed at that point in history given the circumstances that caused the lost of one or two predators...

  • @bunnyviperaquatics2108
    @bunnyviperaquatics2108 3 роки тому +3

    Can someone please clarify? What am I missing? This gentlemen tossed these starfish back into the ocean and the ecosystem changed- ok, but why didn’t the starfish come back? Once they hit the water a second time, did they forget how to crawl back on shore?! What kept them from coming back on land? Why wouldn’t they? This is a serious inquiry and I appreciate your feedback in advance! Have a good one!

    • @biointeractive
      @biointeractive  3 роки тому +2

      He kept throwing them back. Plus, starfish move slowly. nautil.us/issue/34/adaptation/the-ecologist-who-threw-starfish

  • @adajocabethalvarez8117
    @adajocabethalvarez8117 4 роки тому +1

    This is why I'm studying Ecology!

  • @Tylerthemusicophile
    @Tylerthemusicophile Рік тому

    I have a question for this video. If otters are the keystone species keeping the urchins from eating all the kelp, what is causing the Urchins to stay in the area when the kelp is gone and they have nothing to eat? Urchins can live for up to 25 years and they spawn yearly, surely that environment cannot support the population anymore if that species going unchecked right?

  • @poapoapopopoop
    @poapoapopopoop 3 роки тому +3

    im gonna yeet my exams harder than this dude yeets starfishes

  • @nadianeff3353
    @nadianeff3353 4 роки тому +28

    Having to watch 20 minute videos like this for e learning is making me loose brain cells smh

  • @5c4r_l3tt
    @5c4r_l3tt 2 роки тому +2

    i’m wondering if any of my classmates are also cramming this info last minute

  • @hamoodhabibi8031
    @hamoodhabibi8031 4 роки тому +4

    13:06 wait a minute how is he takin notes underwater?

    • @rebeccahowell9531
      @rebeccahowell9531 3 роки тому +1

      There’s water proof paper. My swim coach had some for taking attendance. She didn’t know how it worked either tho :)

  • @m_disulphide
    @m_disulphide 4 роки тому +2

    RIP Robert Paine

  • @ryziemusic
    @ryziemusic 4 роки тому

    wow this is lowkey pretty intriguing

  • @arcticmaritimus2263
    @arcticmaritimus2263 6 років тому +4

    So amazing and educational! Thank you

  • @olivia-cb2qq
    @olivia-cb2qq 5 років тому +3

    Can u help me with my bio cer for this

    • @petraking4060
      @petraking4060 5 років тому +1

      It's rough... still chewing on it, but here it is :-)
      6. CER Question: What happens when you remove the predator starfish from a single outcrop? For a 1 ½ years & 3 years
      • Claim (1 sentence- Scientifically accurate -Completely answers the question using words from the question)
      • Evidence - scientific data that supports the claim (use the numbers or % or fractions…)
      • Reason: How does evidence support - or not support- the claim?
      Since (reason) ___________________________________________________________
      Then (then) ____________________________________________________________

  • @jonathanshedd1052
    @jonathanshedd1052 4 роки тому +4

    Mrs. Soroak do be making us watch the video tho

  • @all_hallows_eve79
    @all_hallows_eve79 6 років тому +2

    Very helpful in revision for ecology

  • @liminalwysteria
    @liminalwysteria 6 місяців тому +1

    1:00 IT ALL BEGAN WHEN A RANDOM GUY THREW A STARFISH

  • @junepedley4920
    @junepedley4920 4 роки тому +4

    Nobody killed an entire ecosystem! Paine was able to demonstrate there was such a thing as a keystone species and that removal of a keystone species impacted the biodiversity of the system.

  • @yianniskrompas
    @yianniskrompas 5 місяців тому

    lovely, thank you!

  • @mafarmerga
    @mafarmerga 5 років тому

    I wish that I could give this more than one thumbs up!

  • @obiwahndagobah9543
    @obiwahndagobah9543 7 років тому +10

    All the hunters, who say hunting wolfes is healthy for the Environment, should watch this

    • @12SoccerdudE21
      @12SoccerdudE21 6 років тому +5

      in some ecosystems, wolves are a problem and do need humans to keep it from getting worse. especially because the sections of wild are broken up by cities and roads like never before which confuse the system as well, and force groups of animals in smaller areas. also, for every square mile of city, there are tens of miles of farm for food that you and everyone else eats, and farmers are not so wealthy that they can replace unsold stock. :) walk in peace!

  • @Radagast-
    @Radagast- 2 роки тому +2

    It stands to reason that a finely balanced system relies on the contribution of all the component parts... if each were not integral in some way, then they would disappear.
    I really don't see that this guy is a groundbreaker for discovering that removing a component from the system causes the system to collapse. Especially as he did it deliberately.

    • @kevinmcdunn8058
      @kevinmcdunn8058 Рік тому +1

      Most ecosystems don't behave like this, and aren't "finely balanced." Removing a random species usually has little or no effect. His discovery is that some species, "keystone species," have an outsized influence on an ecosystem relative to their abundance. To a lesser degree he supported the hypothesis about the top-down regulating role of predators generally.

  • @tigerday9059
    @tigerday9059 4 роки тому

    what is the role that competition plays in the relationship between muscles and other crustaceans?

  • @12SoccerdudE21
    @12SoccerdudE21 6 років тому +2

    love this. thank you! will be sharing!!!!

  • @vidaripollen
    @vidaripollen 3 роки тому +1

    Beautiful

  • @preyapatel6285
    @preyapatel6285 9 місяців тому

    I have to keep pausing the video wish there was a answer key online somewhere

  • @doodelay
    @doodelay 3 роки тому

    this is amazing

  • @DubVisualz
    @DubVisualz 4 роки тому +1

    what kind of question did professor smith ask his class?

  • @GMDRykryk
    @GMDRykryk 4 роки тому +17

    this aint short wtf

  • @Deadoralive955
    @Deadoralive955 6 років тому +21

    AP environmental science?

  • @DrRECM
    @DrRECM 4 роки тому +1

    Crafoord Prize for Robert Paine?

  • @chrislecky710
    @chrislecky710 2 роки тому

    Dynamic systems are consitently in flux people, so a key stone species is provable and disprovable according to when its observed, this is how life has sustained no matter the situation or circumstances on our planet..

  • @trexflight
    @trexflight 3 місяці тому +1

    My science teacher led me here.

  • @giuliana3113
    @giuliana3113 4 роки тому +4

    sitting in class rn reading these comments plsss

  • @frankmaher7326
    @frankmaher7326 4 роки тому +1

    For the answers just open the transcript

  • @charysesay8476
    @charysesay8476 Рік тому +1

    before even pressing play i knew there would be otters

  • @Taylor-rz7cv
    @Taylor-rz7cv 4 роки тому +1

    Miles kids be swaggin

  • @frankkolton1780
    @frankkolton1780 3 роки тому +2

    Some Asian countries, like Taiwan, China, and Indonesia, to name a few, are performing this same experiment in the Pacific and Indian oceans. Longlining 90 to 100 million sharks each year, cut off their their dorsal fins, and then throw the still living sharks back into the water. That number doesn't include the 10s of millions of sharks taken whole each year. The fins used for soup and chinese "medicine", the majority are brokered thru Hong Kong.

  • @hartfxlt
    @hartfxlt 4 роки тому

    can someone just tell me what this is about thank you

  • @thepro2u720
    @thepro2u720 3 роки тому +2

    Umm... anyone else find it interesting how he died about a month after this video?

  • @moysesbarbosa8486
    @moysesbarbosa8486 8 років тому +3

    great!

  • @doublehelix8330
    @doublehelix8330 3 роки тому +1

    Amazing........

  • @GenericUsername_
    @GenericUsername_ Рік тому +2

    finals go crazy

  • @jordantaylor482
    @jordantaylor482 3 роки тому

    Why is that tree green?: 2:04
    Purple starfish: 4:54

  • @daddyyeah5296
    @daddyyeah5296 4 роки тому

    All animals are equal but some animals are more equal than others

  • @oliviaso9726
    @oliviaso9726 5 років тому +3

    10:07 I see the old version of Cap America

  • @stellatillery-lee4840
    @stellatillery-lee4840 4 роки тому +3

    Can someone tell me what happened to the otters???

  • @НаталияПопова-д6з

    so interesting! like this video, thank u!

  • @beyabeyabe
    @beyabeyabe 6 років тому +3

    oh my god this was so interesting and beautiful

  • @whatabouttheearth
    @whatabouttheearth 3 роки тому +1

    According to Wikipedia when Robert Paine was in the US Army he was "the Batallion gardener" 😄, anyone who's been in the green branches knows how rediculous that sounds. A gardener at all is WTF, let alone only Batallion level.

  • @financialprofessionals
    @financialprofessionals 4 роки тому +1

    15:09 is it just me or does that guy kinda look like Adler from COD: Cold War?

  • @johndafoe600
    @johndafoe600 Рік тому +2

    We must acknowledge our role in this imbalance and make amends.

  • @kalt7990
    @kalt7990 5 місяців тому

    "Some species are more equal than others." Someone doesn't understand the definition of equality, used to describe a set that's exceptional, because there are no exceptions between them.

  • @Neptune-tz6by
    @Neptune-tz6by 4 роки тому +2

    Why are there any thumbs down???? Pretty straight forward folks…...

  • @kathrynsaysdrinkwater6993
    @kathrynsaysdrinkwater6993 6 років тому +5

    5:04.

  • @wagibototrapo
    @wagibototrapo 3 роки тому +3

    if we look deeper... the culprit is human

  • @ronallonog3274
    @ronallonog3274 4 роки тому +1

    ngl that star fish got yeeted