Phylum Cnidaria Part 6: Coral Reefs
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- Опубліковано 2 жов 2024
- We just learned about class Anthozoa, which is the class of Cnidaria that contains all the corals. But there is much more to talk about with corals, as the massive coral reefs that they form act as entire ecosystems unto themselves. Let's get a closer look at these incredible structures!
Script by Ryan Helcoski
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I found you through one of your debunks then got hooked from the kent hovind debate where you completely embarrassed him, but these kind if videos and your other topics are what keep bringing me back!! Dont get me wrong I love all your debunks, especially ones where you completely destroy con men, but man these videos are so informative and interesting to watch!! Makes me wish I had you as a teacher when I was in school!!
#10: I love you work, helping the world one fact at a time.
Been binging some of your older vids, especial the FE stuff. Thanks for all your great content.
Thanks for everything you’ve done to help me in organic chemistry this semester Dave!
Never knew algae could excrete something hard like calcium carbonate
I'm guessing diatoms and kin might blow your mind then no?
@@Sara3346 kin?
Yes, you got a shot of a Caribbean reef in this! Caribbean reefs are not often portrayed in explainers like these! Thanks a bunch!
Also, there are indeed hybrid corals that form viable larvae like in the Caribbean. Acropora prolifera is a viable hybrid coral between acropora palmata and cervicornis. Despite being a hybrid It can reproduce and genomic evidence has shown backcrossing with its parents. However, what more interesting, is that research has yet to find an F2 in the wild.
Very interesting, thanks Professor Dave.
Hey, I’ve been interested in electric eels and how they make electric waves, but the most videos and information on multiple sites say that there are ‘special cells’. So hereby I’d like to ask if you would want to make a video that explains how these cells work. Thank you for the video’s you post, I have learned a ton :)
My understanding is that it's specialized muscle tissue that vibrates extremely quickly, but please take what I say with a large grain of salt as I'm going off of memory here entirely.
@@Sara3346 I would definitely take that with a grain of salt, as while the electricity produced by electric eels is indeed produced by specialized muscle tissue, "vibrating extremely quickly" does not make electricity, here or otherwise. What actually happens is the electric eels take advantage of the fact that muscles already rely on electromagnetic charges to function. That is how we send signals throughout our body, both in terms of muscles and neurons. I won't get into exactly how it works, as I don't remember the specifics myself, but basically electric eels take this characteristic and amplify it practically 1,000,000-fold. They apply this extreme voltage to only a few select organs in their body, which are entirely unique to them, and take up over 80% of their total body mass. It's an extreme evolutionary modification like no other, but it is also extremely effective for them.
Also, fun fact, electric eels are not actually eels! It's very much a misnomer.
@@thalia3057 Thank you dearly, I didnt wish to misinform anyone it's just been something I have struggled to get my head around.
I think they are knifefish?
Is there anything we can do to promote healthy growth? From my understanding it's slowly disappearing. Chalked over and dying.
Captive breeding is possible for some I believe.
Strontium is still stupid to me. In dutch, Stront means poop. My chemistry teacher literally had to mention that strontium wasn’t named after poop in class when we first discussed it.
Same here man 😔
In English, it sounds like 'strong', like it's the element of Captain America's shield or something, though I know the movies say it's vibranium.
Love cnidarians!
Not even studying this, but coral are cool.
bro literally knows everything
Christian biology - fish would drown if it were not for god's merciful existence... 😂
I swear you know everything
hey prof! i used to be a victim of the simplified “observation/consciousness influences reality” of quantum physics and finally took a class that explained the wave function collapse and how that statement is pretty much fully BS. that said, Quantum Field Theory is rly intriguing to me and i’m curious what, if any, spiritual beliefs are possibly compatible with science? for one, the food chain- i.e. way in which all living things on earth get their energy from the sun -is something that feels inherently spiritual to me.. but i can’t begin to say why 🤷🏼
Any spiritual beliefs that do not directly contradict science are compatible with science. The food chain begins with autotrophs and photosynthesis, that's a fact. If that fact gives you all kinds of nice feelings and thoughts that you label as spirituality, that's totally fine.
@@ProfessorDaveExplains Sweet!! pretty much what i was expecting you to say! keep up the amazing content
Also there are cases of viable hybrid corals, The acropora family has many examples of hybrid corals. Richards & Hobbs (2015) "Hybridisation on coral reefs and the conservation of evolutionary novelty" in the journal of Current Zoology
I keep reef my self great video
Professor Dave! I love your videos. I'm microbiology student, and I look into making biology related videos on UA-cam in my native language. Please, can you name microphone that you're using?
Oh I don't even know it's some crappy radio shack mic I got like 15 years ago. Get anything even semi decent and you'll be fine. Get a pop filter too.
Wow!
😊👏
Dave is a great example of our American education system.
A way to gather knowledge? Um, yeah.
Really? I was under the impression our education system was terrible, but if its as good as Dave i suppose not
Hard disagree; our education system is ass. Dave's videos are fucking great though.
I hate to bring this up on a science channel, because I'm sure my perspective here is pointless, it would be anecdotal at best. That coral infographic/diagram looks alot like a close up of a hair follicle. Do with that as you will. don't start a religion or cult based on these findings. #coralhairfollicleearth
I hope these animals survive us. Many won't.
Birds are people too.
Lizard people!
IF the GBR formed 600.000 years ago then there is no reason to fear climate change killing off the corals. Just a 100k years ago the SST was 2ish c warmer than today in the southern oceans. "To help improve projections of future ice sheet melting and sea level rise, we sometimes study past warm periods. One of these past warm periods is the last interglacial (LIG: ∼130 to 115 thousand years before present), which was likely a couple of degrees warmer than present."
Two words: ocean acidification. Try not to pretend you understand science better than scientists.
Organisms take time to adapt to changes. If changes happen too fast, then they can't adapt quick enough and start to die off.
@@WanderTheNomad They've already adapted if you take a look at research.
@@ProfessorDaveExplains no, try again but this time research what the corals have already done during this "crisis".
@@FreemanVashier You speak of adapting like it's a one and done thing. Adaptation is a spectrum. Just because they maybe more suited to changes than they were previously, doesn't mean that it's enough to survive through the current situation.
It's like if you get promoted and make 10% more than normal, but everything is 100% more expensive. You can't say those two things are equal just because they've both increased.