Ecological Succession: Change is Good - Crash Course Ecology #6

[@AfkOptic]

Station 5 answers for me. (Take this with a grain of salt) 1. Orderly. 2. No competition. 3. Plants, they make the ecosystem habitable. (Not sure about this one) 4. Never stops because it can’t. (Or this one) 5. Weather. 6. Probabilities, not certainties 7. High biodiversity.

[@Tay_and_Hay]

For biology ppl station 5: 1. Predictable and orderly 2. There is not competition, so pioneer species like prokaryotes and non-vascular plants can live there successfully 3. Plants because without plants, people and animals won’t survive 4. Succession never stops because change never stops 5. Stochasticity (randomness) prevents us from being able to tell what it will look like in the future 6. Probabilities not certainties 7. If it has high biodiversity Hope this helped!🤍

[@TegaOnYT]

Thanks, may God bless you 🙏

[@Ech0TheCerva]

Oh my freaking god you are a GODDESS THANK YOU SO FREAKING MUCH

[@kaylahayward4267]

I love you sm

[@larz-barz]

❤tysm

[@tripwanna]

I literally love you thanks

[@ceizmendi]

At about 2:00 min, Hank gives an example of primary succession that I believe is incorrect: forest fire. All the other examples he gives could remove or destroy the organic matter in the soil, but forest fires definitely don't. By definition that's secondary succession. Primary succession has to be starting from bare rock, whether solid bedrock, crushed-up sand, or particle sizes in-between.

[@gm-fm9rd]

+ceizmendi came here to be sure someone said that. Often, a forest fire leaves root and seed stock.

[@hackedbyanasshole5397]

Wow. I'm not the only nerd watching. MARVELOUS!

[@ananyanath855]

came down here to comment exactly that. Actually almost all of the examples he gave were of secondary succession since the main condition for primary succession is that it should be an area that has never been inhabited before

[@magnuspeacock5857]

I'm glad that some people are nerdy enough to notice that.

[@magdaleneochola4179]

@@ananyanath855 How does that work tho?? Cuz if the area has never been inhabited before how will anything grow from it. Plus how do you have an inhabitable area. There has to be something. Maybe some kind of bacteria or a species of plants that hasnt been discovered yet. Idk. Im just a 9th grader trying to study for a big biology exam

[@jadetheshade]

i thought "niche" was pronounced "neesh"

[@rainer_uncrowned]

It is, but ya know Americans... they be crazy!

[@y2kona]

R S what

[@Makeupby.garima]

@@rainer_uncrowned lmao true

[@rainer_uncrowned]

@@y2kona because Americans pronounce it differently.

[@heyimmashark9030]

rainer I’m American and I say “neesh”

[@user-yh7br7oo4z]

I’m watching this for online school during Corona-virus. ( I hate my school district!!!!!😠)

[@mayrana7645]

V sameee

[@thetruth830]

Same

[@alexispaige772]

Same

[@user-yh7br7oo4z]

Teresa Cruz Cuevas ...Fort Bend?

[@gilbbyoutdoors]

Ik how you feel these texas schools be tripping all knowledge I've gained about biology and ecology have come from crash course. I personally believe that Crash Course is better that learning at school anyways

[@helllocathy]

Studying for my environmental science final exams...

[@EnderFlames]

catwang same here

[@hayleyf9438]

Me

[@nowlun]

YEP

[@abee948]

catwang same lmao but quarantine style

[@StephObsessed]

Hank, you are the reason why I have an A in Biology.

[@mycominer]

Not only did you just help me understand ecology better, I think you just helped me to understand the economy better as well.

[@rayamoooooo685]

06:31 "some yeehaw might rent himself a backhoe one week and clear himself a lil' patch of heaven" 😂

[@MaiCohWolf]

I'm a ranger in Yellowstone... it wasn't a single lightning bolt that caused the 1988 fires. It was 42 strikes, along with 9 or so human-caused fires that coalesced into several massive fires that swept through the park. But Hank's definitely right about it burning so bad because it hadn't been allowed to burn in a long time -- 36% of the park was torched. We learned a ton about fire management from the event. Love this channel tho, and thanks so much for the awesome ecology series, Crash Course! :)

[@chiblast100x]

I'm really loving these last few episodes, they cover many of the topic in ecology that I've had the most fascination with over the longest time.

[@skimperplayz1448]

When you've memorized that theme song, you know you've been preparing hard for that bio final 😂😂🤣🤣 I love this course. Hope Hank recovers from cancer 🙏🏻🙏🏻🙏🏻

[@andrewbusch5119]

Seriously man. You would help twice as many people if you would just slightly modify that tempo. Love you though. - Native English Speaker

[@TerenceClark]

I loved watching the succession activities of the cottonwoods on pavement where I went to school. It took the maintenance folks months to clean it all. And by the time they did, the seeds, which couldn't grow on their own, had nevertheless built out a "soil" matrix of sorts that had started to support mosses and clovers in short order. Like it or not,our landscapes are just a new, weird sort of niche for nature to dig in to.

[@leannyly]

"Niche" rhymes with "quiche"...

[@LuisSierra42]

Very smart observation, it blows my mind

[@Ali-cr9ex]

very funny observation i laughed historically and came a little

[@KaziCare]

Actually it doesnt vs

[@CrazyGamer-xi8rf]

Rat eaters

[@grammy9284]

it doesn't.

[@bengoulet11]

literally went on youtube to distract myself from studying ecological succession.. thanks Hank

[@steelshade]

Hank: "There is one tremendous advantage to desolate waste lands..." Me: "No competition." Hank: "... no competition." I totally called it. I must be learning something. Thanks, Hank!

[@TacticusPrime]

The REASON that the fire was so terrible in 1988 was BECAUSE fires had been prevented in Yellowstone for so long. For decades fires were conceived to be only bad for the ecosystem, so they were smothered quickly. Finally, there was just too much raw material available for the the fire, so it went crazy. It's not going to happen like that anymore BECAUSE we allow intermediate disturbance. That's the point Hank is trying to make.

[@User-to7nb]

I WATCH THESE VIDEOS FOR NO REASON AND TODAY WE ACTUALLY LEARNED SOME OF IT!!!! *gasp* thankyouuuu hank

[@laurelpais]

just watched this in my Biology class, really happy our teacher showed us this

[@AmakunaiChan]

CrashCourse team, from the bottom left chamber of my heart, thank you for explaining what I wish school had at junior high level. Ecology is complexly wonderful!

[@samuelfeder9764]

Could you make a whole video on soil creation and what makes a good soil? I personally think that would be really interesting , especially as we constantly hear that soils are lost to deserts ect. but most people don't seem to know how long it would take to creat new ones...

[@actress223]

I teach outdoor education to middle school kids and it's videos like this that make my job as a teacher just a little easier (:

[@rayzars]

Just over ONE YEAR and just under 100 videos!!! Thank you crash course!!

[@magdaleneochola4179]

Love that he is hilarious so that i can laugh while still studying 4 my exam 2morrow that i will hopefully not fail.

[@thecoworker12345]

Every time I hear that theme song, chills

[@JazzyAnne]

Thank you for this! This helped me understand this school topic more :)

[@friendlps9249]

OMG I luv your videos

[@sahejpreetdhillon3581]

I love your videos Jazzy! I'm glad we both find Crash course useful! :)

[@leannabad3839]

Came here because I watched Avengers: Infinity War and Thanos' plan reminded me of this.

[@LaughingMan44]

Wow, it's funny how this concept of change being the only constant and disturbances being good for an ecosystem can also be applied to personal life. Philosophy derived from science always has the deepest impact for me.

[@bitodd]

"Change is the only constant." Planck chuckles.

[@LittleLaurey]

I came on KZbin to procrastinate and ended up revising for my A2 biology exam anyway. Good job Hank

[@vikasvashisth6631]

A NICE ILLUSTRATION OF PEDAGOGIC SKILLS..FAST NARRATION IS A WAY TO KEEP THE LISTENER ATTENTIVE ALL TIMES WHICH LEADS TO MORE ABSORPTION IN LESSER TIME !

[@megafire7]

'Not every change is an improvement, but every improvement is a change.'

[@MogofWar]

Well! Good luck on that.You have your work cut out for you and plenty of time to do it. That's a winning combination you should never take for granted.

[@Nick-li8ol]

Man i wish you were my ecology lecturer.

[@Germanbiscuts]

I'm glad I found someone who knew who this was....... it gets a bit eerie after awhile though.

[@khurramsheraz4419]

This guy literally helped me graduate.

[@unvergebeneid]

This would have been a good opportunity to highlight some recent research that uses recovery time after disturbances to predict overall resilience and thus time left for the ecosystem to collapse completely under the weight of humanity. It's a general rule for many systems that the quicker they recover from small disturbances, the more resilient they are to large disturbances.

[@traehignight]

Any Hudson students here? Or at least others who scanned a QR code?

[@wildebt]

This channel rocks! Thanks for helping me prepare casually for grad school applications.. I am moving from an undergrad degree in biochem to hopefully a graduate degree in ecology or conservation biology!

[@toxiPsychotic]

Another thing that comes to mind is something i think i remember john saying about language. Basically, the purpose of language is to ensure that communication is clear and understandable to everyone involved. People who are grammar or spelling or punctuation nazis don't actually help this much, because they tend to point out errors that are so minor that they have no influence on the clarity of discourse. Sometimes they're even wrong, confusing errors for regional differences and such.

[@kokopelli314]

One of the better explanations. Resilient ecologies are functionally adapted to respond to disturbance within specific time and energy scales. Spruce Budworm cycles within Boreal forests are a good example showing the fallacy of characterizing a stage of adaptive community response as a "Climax" community.

[@SuperRat420]

Whenever we're finished with this or literature, Crashcourse film would be really interesting.

[@annaliselovesyoux]

destruction is a form of creation - donnie darko

[@kibler2245]

What are answers for station 5

[@nathanoliver9237]

It's like an economy depressions and booms come and go. And the metaphor in which humans trying to interrupt change makes it worse disturbance.

[@MeganMcken]

i took an ecology course in first year uni and that's one of the few things i remember. Spiders being one of the first animals to colonize in disturbed areas.

[@layanmahmoud8210]

omg i have midterms and this REALLY! HELPS

[@NexxZt]

Thanks dude! Reading for my exams on tuesday, and this video is a whole lot better than what my book and teacher has to offer :)

[@Germanbiscuts]

Finally, something on the KZbin that won't turn my brain to mush.... thanks Hank... and Scishow...

[@abbiepanda9367]

Have you ever noticed how life mirrors the earth? Like when there's a forest fire. Sometimes there's a disturbance and there's nothing you can do but watch everything burn down and die. It's horrible and sad but it's for good reason because the ashes are what allows things to rebuild. Often you must rebuild and it starts small like flowers, that may not seem like a big deal but eventually bigger things will grow and soon there will be something different but even more beautiful. Stay strong I love you.

[@marekcoleman1890]

I learnt all about this in uni and i think he summed up the concept quite well. there is still a lot more detail that can be found about this such as how surveys of ecosystems support the intermediate disturbance hypothesis. It was really interesting when we investigated how the aboriginal communities applied this intermediate disturbance although they didn't do it with the intention of the increased biodiversity it causes. Ecology is just really interesting.

[@phoenix-king779]

HEY U. 🔴🔴🔴🔴🔴 YOUR GOING TO DO GOOD ON YOUR FINALS.🔴🔴

[@FallenEpic]

Here in Washington State we get to see what happens in primary succession first hand in the land that got completely wiped out by the Mount Saint Helens eruption. I recommend looking up that environment and seeing how it recovered and changed. Although that's the 30 years later mark, not 1,000 years later maker.

[@sheepblitzer]

Plowing a field or tilling a garden is another example of a disturbance, and what we call "weeds" are the primary succession, nature's way of healing desolate land.

[@Mormodes]

No, I understand that, my question calls for preventing fires in a way that allows small portions to burn rather than trying to prevent ALL fires from occurring. It would be like having patches of farmland separated by a large enough distance that the fire could not spread from one spot to the other.

[@tadblackington1676]

You stated very sussinctly the problem with our models of succession, we are only talking about plants. Why? Animals exist and they can be great drivers of disturbance and biodiversity. The "battle" between vegetation and herbivores is a huge driver of biodiversity. The problem we have with it is that it changes the models of succession we need to have in our heads from linear to circular, ie Frans Vera's model.

[@geerasnake7163]

Happy Birthday Mr.Ritt

[@Eman-wj8gq]

Hank you are the man. Thanks for making these videos so fun.

[@sfobrien5225]

On the note of invasive species, we are introducing species at 1.a faster rate than ever seen before and 2. are moving those species a greater distance than seen before. Causing impressive extinction rates and loss of biodiversity, which again is bad for everybody

[@kodznor5932]

This answered all of my biology homework questionsssss, thanks :)

[@Megan-ik2iq]

Fantastic series! Thank you for helping me study!

[@Zandonus]

Change is the thing that is a thing, evil is not, but there is lack of wisdom. Suffering is not, there is lack of wisdom. Death is not, there is lack of wisdom.

[@osas007oxygen4]

Thank for this video i know it now

[@smnk3]

Brilliant. Exam this Friday.

[@Thorin1300]

I haven't Been to Yellowstone but i have been to Mt. Saint Helens. The cool thing about MT saint helens is that you can go from one level of disturbance a different one by walking to and fro from the mountain. The closer areas having been completely destroyed after the eruption while farther areas just having fires or toppled trees and all the ash problem. Ecologist are probably having a lot of fun up there great vid Hank Look forward to the next one DFTBA

[@markjustice5416]

Crash Course is the best

[@fangirl2643]

I may not be Hank, but I am an ecology student. The succession of the area would most be dependent on the seed source and the soil. 1000 years after the event, soils would be thin, mostly, leading any tree species to be pine and, even more likely, aspens, which are the very first tree species to move in. However, there would most likely still be places of forbes, especially where the glacier took away soil. Looking into the glacial retreat in the American Midwest might help : )

[@marymartinangel5988]

Wow! This was very helpful! I am a student of wildlife management and doing an essay on succession. Thanks!

[@dolmalhamu6000]

thanku hank et al for the crash course.boosted my confidence. thanks again....

[@kylieveale6462]

great examples and definitions that helped confusion and learning through online school due to COVID-19!

[@TDawggggg]

This guy looks like a combination of Bill Nye and Ben Folds.

[@ellyhall8394]

Hank, this video would've helped so much more 3 weeks ago when I had a test on exactly this in AP Environmental Science. -sigh-

[@Onychoprion27]

Helens didn't take the area back to 'wiped out by an asteroid'. It didn't have to rebuild soils, which is why trees started re-growing almost immediately (secondary succession)

[@ltericdavis2237]

I know it's a constant, but please don't change, Hank! Crash Course Forever!

[@haroonrasheed11]

studying for my forestry and woodland test, really helpful video. Thankyou!

[@elllee653]

I absolutely hate how he can't stay on topic.. i feel like he gives me a lot of info that doesn't really explain what the main topic is

[@PURITYKIN]

Whenever I'm watching these video's and I learn a new word, I like to pretend I knew it before now.

[@sanakhtthefatetwister9116]

Change is the only constant Calculus: I'm about to end this man's whole career

[@bigdog31622]

I think Thought Bubble would totally zazz up the production values of Hank's videos

[@TheLove2surf]

Many thanks! Excellent resource!!!

[@feldwebelblitz2553]

Niche is a French word and it sounds more like 'nitch' than 'neech'. Americans may have the habit of making unusual changes but, this time, this makes sense.

[@wbmtaverage]

You pretty much just explained a whole topic of the A level biology specification. With key terms and everything.

[@kaninma7237]

"Some yeehaw..."....I love it!

[@carlokeil3856]

Two words to describe what's happening, Natural Selection. The animals that adapt survive, the ones that can't adapt go extinct. If a species goes extinct, no biggie, they just couldn't adapt! Suffering comes in overpopulation, and that's what happens when we protect the animals. Let animals thrive while we change!

[@ceressculd]

"Who knows! Stuff happens!!"

[@SuperPrettyCOLORS]

Crash Course AP Chemistry... I don't want to fail next year and you could make it interesting!

[@CamilaAcuarelas]

This helps so much with my Landscape Architecture Studio project!!!! THANKS!

[@MogofWar]

If you have a test on it in July, and you haven't read it by then, you fail at life... It would still be awesome of John did an episode on it.

[@alibrastar28]

Is that a little speeded up video or he talks that fast?

[@TheBlaze4000]

well wow hthat was fast woah shut the fuck up

[@preternatural3231]

this is the funniest comment i've ever read

[@allamericandude15]

"No changes are permanent, but change is."--Geddy Lee.

[@crazycomicbooklife]

The only constant is change. True!

[@sutematsu]

I'd say they're both good for different things. SS is great if you understand the basics already and don't gloss over easily, while MP is good if you're just trying to get started and don't understand almost anything yet.

[@Zulligula]

Profound implications for life and forests everywhere

[@WisemanSam599]

The presence of the forces is constant, even if the forces themselves change. Which works out well, because change is constantly changing. Death is also pretty constant, (but I supposed death counts as a change).

[@Ozycaevias]

I watch for the intro, I stay for the awesome. (Oh...and the learning... But that's just a side effect of staying.)

[@sfobrien5225]

Right, the thing is nearly all extinctions occurring today are thanks (at least in part) to humans. I would wager that nearly all preservation efforts today are to save species we have crippled. I was making a point about why preservation is always important even if species might not be "right". Preserving certain species isnt "funny", it makes perfect sense. Just trying to clear that up.

[@MrGuilhermeSilvano]

"Now, here, you see, it takes all the running you cando, to keep in the same place. If you want to get somewhere else, you must run at least twice as fast!" - Red Queen

[@emeseszorenyi5245]

Your graphics (by your team) are freakin awesome!!!

[@1rayloke]

Succession for crash course candidates, as in dirt is beautiful REALISTICALLY !