Thomas Evans
Thomas Evans
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23 Restoration
This is the final lecture of BIOL 380 - Stream Ecology. This lecture is an overview of the basis for stream restoration and the challenges of attempting it. The reading is: Wohl, E, Lane, SN, Wilcox, AC. 2015. The science and practice of river restoration. Water Resources Research, 51: 5974-5997.
Переглядів: 683

Відео

20 Indices of Biotic Integrity
Переглядів 1,5 тис.4 роки тому
This is the twentieth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of IBIs or Indexs of biological integrity. The reading is Ch 38 Macroinvertebrates as Biotic Indicators... in MSEv1 and "From the Mountains to the Sea: The state of Maryland freshwater streams."
19 River continuum concept
Переглядів 7 тис.4 роки тому
This is the nineteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of River Continuum Concept (RCC). The reading is the original paper: Vannote, RL, Minshall, GW, Cummins, KW, Sedell, JR, Cushing, CE. 1980. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences 37: 130-137
21 Human pressures other than Climate Change
Переглядів 5074 роки тому
This is the twenty-first lecture of BIOL 380 - Stream Ecology. This lecture is an overview of some major human impacts on stream ecology other than climate change (including, Pb, Hg, acid rain, dams, and stocking). The reading is two papers: Wohl, E. 2005. Compromised rivers: understanding historical human impacts on rivers in the context of restoration. Ecology and Society, 10: 1-16, and Carpe...
18 Modeling: Size Spectra Analysis
Переглядів 7504 роки тому
This is the eighteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of size spectra analysis, and how it might be used in streams. The paper associated with this lecture is: Blanchard, JL, Heneghan, RF, et al. 2017. From Bacteria to Whales: Using Functional Size Spectra to Model Marine Ecosystems. Trends in Ecology & Evolution 32: 174-186.
17 Modeling: Production
Переглядів 3164 роки тому
This is the seventeenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of production. The reading is Ch 34 Stream Metabolism and Ch 35 Secondary Production... in MSEv2. Find the materials I drew on from: www.nature.com/scitable/knowledge/library/secondary-production-13234142/
16 Amphibians, reptiles, and birds
Переглядів 1 тис.4 роки тому
This is the sixteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of how amphibians, reptiles and birds can impact stream ecology. The reading is Ch 17 Amphibians and Reptiles in MSEv1.
14 Fishes I
Переглядів 1,1 тис.4 роки тому
This is the fourteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of fish as they relate to stream ecology. The reading is Ch 9 What's it all mean? in Matthews, WJ, Marsh-Matthews, E. 2017. Stream fish community dynamics: A critical synthesis. John Hopkins University Press.
15 Fishes II
Переглядів 6544 роки тому
This is the fifteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of fish families found in Maryland. The reading is Ch 9 What's it all mean? in Matthews, WJ, Marsh-Matthews, E. 2017. Stream fish community dynamics: A critical synthesis. John Hopkins University Press.
12 Macroinvertebrates I
Переглядів 2,6 тис.4 роки тому
This is the twelfth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of aquatic macroinvertebrates, the drift paradox, and common non-insect macroinvertebrates. The reading is Ch 15 Macroinvertebrates, Ch 18 Invertebrate Consumer... and Ch 20 Trophic Relationships... in MSEv1.
13 Macroinvertebrates II
Переглядів 1,3 тис.4 роки тому
This is the thirteenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of aquatic insect orders in stream food webs and how they get oxygen. The reading is Ch 15 Macroinvertebrates, Ch 18 Invertebrate Consumer... and Ch 20 Trophic Relationships... in MSEv1.
11 Allochthonous resources
Переглядів 1,1 тис.4 роки тому
This is the eleventh lecture of BIOL 380 - Stream Ecology. This lecture is an overview of how allochthonous sources contribute to stream food webs. The reading is Ch 27 Leaf-Litter Breakdown and Ch 29 Dynamics of Wood in MSEv1.
10 Autochthonous resources
Переглядів 9364 роки тому
This is the tenth lecture of BIOL 380 - Stream Ecology. This lecture is an overview of how autochthonous sources contribute to stream food webs. The reading is Ch 11 Benthic Stream Algae... and Ch 13 Macrophytes and Bryophytes in MSEv1.
09 Light
Переглядів 5234 роки тому
This is the ninth lecture of BIOL 380 - Stream Ecology. This lecture is an exploration of how light impacts stream ecology (and briefly covers the topic of the ozone hole). The reading is Ch 7 Light in MSEv1.
08 Temperature
Переглядів 5234 роки тому
This is the eighth lecture of BIOL 380 - Stream Ecology. This lecture is an introduction to temperature drivers in streams. The reading is Ch 6 Temperature from MSEv1.
07 Riparian processes
Переглядів 1,8 тис.4 роки тому
07 Riparian processes
06 Stream chemistry III (Inorganic carbon and pH)
Переглядів 7954 роки тому
06 Stream chemistry III (Inorganic carbon and pH)
05 Stream chemistry II with sound
Переглядів 8004 роки тому
05 Stream chemistry II with sound
04 Stream Chemistry I
Переглядів 1,2 тис.4 роки тому
04 Stream Chemistry I
03 Hydrology and geomorphology II
Переглядів 1,5 тис.4 роки тому
03 Hydrology and geomorphology II
02 Hydrology and geomorphology I
Переглядів 4,3 тис.4 роки тому
02 Hydrology and geomorphology I
01 Stream Ecology overview
Переглядів 5 тис.4 роки тому
01 Stream Ecology overview
30 Animal Nutrition
Переглядів 3124 роки тому
30 Animal Nutrition
28 Animal Hormones
Переглядів 8364 роки тому
28 Animal Hormones
26 Osmoregulation
Переглядів 2024 роки тому
26 Osmoregulation
25 Respiratory system
Переглядів 2774 роки тому
25 Respiratory system
24 Sensory systems
Переглядів 3234 роки тому
24 Sensory systems
21 Circulation in animals
Переглядів 3724 роки тому
21 Circulation in animals
23 Nervous System
Переглядів 3584 роки тому
23 Nervous System
Introduction to R (BIOL 106L Week 10)
Переглядів 4854 роки тому
Introduction to R (BIOL 106L Week 10)

КОМЕНТАРІ

  • @angeloriggi6370
    @angeloriggi6370 9 днів тому

    Thanks for the content. I've been a fan of tiktolic for 10 years

  • @elvisbjones
    @elvisbjones 15 днів тому

    I know it’s a shortened version but is it skipping to different things before a thought is finished in some parts?

  • @MeanBeanComedy
    @MeanBeanComedy Місяць тому

    Why do you have part 2 videos for things that dont have a part one and vice-versa?

  • @dawnmorning
    @dawnmorning Місяць тому

    Great video.

  • @MrEllern
    @MrEllern 2 місяці тому

    These are great resources! I teach Middle School Science in Reno, NV. I've love to share this with my students, but not in such detail. Is there any way I could get the powerpoint slides so I could distil the content, but not the graphics?

    • @thomasevans3387
      @thomasevans3387 2 місяці тому

      Yes if you want to get these resources I am happy to share, you can send me an email at bottledwater88 at gmail

  • @rosachibwe6976
    @rosachibwe6976 4 місяці тому

    Thanks so much with the information

  • @stevendorries
    @stevendorries 4 місяці тому

    Can you record an updated version of this lecture next time you give it? I like to compare academic lectures on the same topic across time to see how our understanding of things evolve

    • @thomasevans3387
      @thomasevans3387 4 місяці тому

      If I had time I would, currently I don't have the time to update this class. However, if I do I will certainly post them and that will also solve the volume issue. If you are interested in reading a bit more of an updated look try this paper: www.nature.com/articles/s41598-023-35784-3

  • @nicksievers1664
    @nicksievers1664 5 місяців тому

    Scutosaurus is a parareptile

  • @longcastle4863
    @longcastle4863 6 місяців тому

    They don’t look very anesthetized

  • @56madone
    @56madone 7 місяців тому

    me too love them

  • @myersbriand
    @myersbriand 7 місяців тому

    You state in here that early archosaurs are expected to exothermic because crocodylians are yet the explanation for the advanced heart in crocodylians is endothermic ancestors Edited for typo

    • @thomasevans3387
      @thomasevans3387 7 місяців тому

      If true, sorry for the confusion. The increased efficiency in archosaurs appears to be stepwise, ultimately leading to a few of the groups gaining endothermy at different times (although not settled). For instance, dinosaurs and pterosaurs probably both had endothermic members, but the common ancestor probably did not. And some dinosaurs appear to have given up endothermy. (www.sciencedirect.com/science/article/pii/S1342937X20302252; doi.org/10.1016/j.cub.2024.04.051; www.nature.com/articles/s41586-022-04770-6)

    • @myersbriand
      @myersbriand 7 місяців тому

      @@thomasevans3387 thanks for the article

  • @roxyamused
    @roxyamused 7 місяців тому

    Hey! You leave Lystrosaurus alone! Our ancestors probably benefitted from their burrows. They even found animals taking shelter in their burrows with them, whether they were in there sheltering together or one died and another took shelter not clear, but still, I think of them as the capybaras of the PTE and early Triassic.

  • @KrishnaReville
    @KrishnaReville 8 місяців тому

    So grateful for this amazing series of lectures. Wondering if you may have any ideas if there are similar available for Australia? Thanks so much!

    • @thomasevans3387
      @thomasevans3387 7 місяців тому

      Glad they were helpful. These were put together by me for a course, so all you need to do is convince someone in Australia to put their lectures together.

  • @BeaChapman
    @BeaChapman 8 місяців тому

    Great video!

  • @cousinwillis
    @cousinwillis 8 місяців тому

    Wonderful. You mention a video of ornithischian chewing, here is one ua-cam.com/video/BqdmVjOYG5w/v-deo.html&pp=gAQBiAQB

  • @anielkoemargangadin3697
    @anielkoemargangadin3697 8 місяців тому

    Useful for me. Thanks

  • @Peter-Franz
    @Peter-Franz 9 місяців тому

    One of the silver lining of the pandemic is the free lectures on youtube :D - thanks for making these public

  • @brunobucciaratiswife
    @brunobucciaratiswife 11 місяців тому

    I’m back! I love listening to these lectures. I hope it’ll help during college. Yay dinosaurs, yay evolution, what a beautiful example of the work of God!

  • @quantumcat7673
    @quantumcat7673 Рік тому

    About the Cambrian explosion, I believe that the reason is mostly genetic. The genome of organism was unstable for some time before mecanism evolved to stabilize the genome. So lots of new organism could evolve when predator arise and higher oxygen concentration in the environment.

    • @thomasevans3387
      @thomasevans3387 Рік тому

      Here's a great summary of the recent work on that: www.nature.com/articles/530268a. The point you suggest has also been considered, i.e., did evolution have more flexibility? Given that life was quite old at that point (~3.5 billion years) I find it unlikely that evolution had not worked out how to do DNA repair efficiently, but I am partial to the idea that there was lots of ecological niche space. As oxygen opened up opportunities for animal body plans, basically everything and anything that appeared could be refined into an animal body. From this explosion, came a long winnowing process afterwards with the most successful bodies displacing less efficient and adaptable forms. However, this is an active area of research and an important place for us to be careful, because the rules that apply today may have only been weakly in play and our assumptions about how systems function is built on a world quite different than the one that existed at that time.

  • @quantumcat7673
    @quantumcat7673 Рік тому

    I'm an engineer but this class of interesting Earth sciences will probably help me when brainstorming a new design. I love the brilliant ''engineering solutions'' of life as it evolve.

  • @lloydmckay3241
    @lloydmckay3241 Рік тому

    Excellent. Thanks.

  • @Clark1967
    @Clark1967 Рік тому

    39:15 That cartoon with the fish standing outside there bowl that is caught on fire. I remember that cartoon from 25 years ago. And it was called "The "Farside." A very funny comic strip.

  • @ellenbryn
    @ellenbryn Рік тому

    As our own weather starts to manifest new extremes, I'm getting a fresh perspective on The Great Dying. It's not just really hot with acid rain caustic enough to damage eyes and maybe even skin. Weather extremes like we're just starting to see, but far worse, would be augmented by the volcanic gases and metals emitted by flood basalt eruptions or leeched out of the ground by acid rain. Imagime severe acid rain and flood events and hurricanes. Or, during droughts, firenadoes kicking up heavy metals, sulfur and chlorine like the chemical weapons of WWI turned into weather bombs. Mudflows and landslides and boulder storms like the one that hit Montecito, California about 5 years ago (look up the YT video "The Night it Rained Boulders") would be common... I seem to recall one bit of research that all the rivers on Earth seem to have reverted to their pre-vegetation state, losing their meanders and charging downhill in boulder-filled ravines in a straight line. And ponds, lakes and marshes would be sour, stinking, and often poisonous, since hot standing water tends to lose its oxygen and become fit only for anoxic bacteria. it really is amazing that anything (especially plants) survived.

  • @faldarith
    @faldarith Рік тому

    These are great, in case you ever find yourself wondering.

    • @thomasevans3387
      @thomasevans3387 Рік тому

      Thanks Faldarith, I am glad you found them helpful.

  • @luckyotter623
    @luckyotter623 Рік тому

    I just found your channel and already am finding your lectures fascinating. I am learning so much! Thank you for posting these.

  • @shadetreader
    @shadetreader Рік тому

    Wtf is a supposed science teacher doing talking about "Jesus"???

  • @johnnywilson7799
    @johnnywilson7799 Рік тому

    There has been other times when we had 100 plus temps for long periods of time when there were no cars on the road like in 1909 this has nothing to do with fossil fuels

    • @thomasevans3387
      @thomasevans3387 Рік тому

      Here you are letting the word weather substitute for climate, and really climate is much bigger. It is similar to saying, if you worked on a ship, "No ship sinks" because your own ship is not sinking (yet), when in fact you need to consider the fleet of all vessels that have every put to sea to make your statement. If all you are looking for is 100 temp days I can almost guarantee that by that metric (because you are now using a metric not a direct measure) climate change has not happened in 100's of millions of years. Might I also ask, how do you know what the temperatures of locations in the past were like given they were often not measured (assuming you are relying on models)?

  • @ScotsmaninUtah
    @ScotsmaninUtah Рік тому

    99.9% of life going exitinct ? The Permian/Triassic extinction event did not result in this level of extinction

    • @thomasevans3387
      @thomasevans3387 Рік тому

      Fair enough, these were upper estimates and appear too high. However, some ecosystems probably suffered 100% extinction rates (that is they ceased to exist). Extinction is patchy, so when you see high estimates as large as this functionally we are saying ecosystem loss and wholesale change at the global level.

  • @igorzkoppt
    @igorzkoppt Рік тому

    There is a slight misconception about the VEI measurement though, but a very common one even among scientists: VEI only really applies to volcanic explosions, not to effusive eruptions in general. It is always tempting and very intuitive to only measure the volume of lava and scale it on the VEI, but this doesn't really work - the actual VEI measurement takes account of the height of the ash columns, which makes little sense with a LIP accounting a very long period of mixed eruptions, mostly effusive. We need a new intuitive and potentially popular index for volcanic eruptions ^^' Now I understand that using the VEI reference that way makes it a very good vulgarization tool, but then the vast majority of people have the wrong idea about what the VEI measurement actually is.

  • @igorzkoppt
    @igorzkoppt Рік тому

    Fantastic work, I already watched this lecture three times along the years.

  • @GeorgeMerl
    @GeorgeMerl Рік тому

    Ranting in my head about conflating reptiles with amniotes thus making mammals also reptiles. We don't need another 'well actually, birds are reptiles,' situation. I'm a firm synapsid respector.

    • @bruhmingo
      @bruhmingo 10 місяців тому

      Right, there’s no reason to define reptilia as amniota. Just define reptiles as sauropsida.

  • @dangallagher8034
    @dangallagher8034 Рік тому

    Brilliant! You're a hugely valuable resource. Many thanks. (my writing coach said never use exclamation points but in this case, it's a must)

  • @rockroll9761
    @rockroll9761 Рік тому

    Jacksonville Florida is 25 billion square feet. You can fit everyone on the planet in jacksonville over three times

  • @colincreeden7310
    @colincreeden7310 Рік тому

    Are they invasive?

  • @servantofgod5642
    @servantofgod5642 Рік тому

    when are going to tell these brainless gullible fools how the river pebble evolved into a basketball ?

  • @jensphiliphohmann1876
    @jensphiliphohmann1876 Рік тому

    About 36:00: Great landscape!

  • @jensphiliphohmann1876
    @jensphiliphohmann1876 Рік тому

    All Earth Mordor...

  • @jensphiliphohmann1876
    @jensphiliphohmann1876 Рік тому

    About 10:05: I once heared that those of the arthropods which could fly (like giant dragonflies) survived into the Permian because they got more oxygen than flightless ones.

  • @enroute6105
    @enroute6105 Рік тому

    Now I understand Yellowstone and global warming it's nothing we can control

  • @Kyle_Schaff
    @Kyle_Schaff Рік тому

    Armored cows. A lot of tongue action is all I’m imagining from these weirdos

  • @lennonwhitehead1352
    @lennonwhitehead1352 Рік тому

    what's a nitch space?

    • @thomasevans3387
      @thomasevans3387 Рік тому

      en.wikipedia.org/wiki/Ecological_niche This is a concept that factors can be used to separate species into functional spaces in the environment. There are many reasonable critiques of niches and these concerns point to a wider problem, the concept is limited at some level.

  • @cecilponsaing2749
    @cecilponsaing2749 2 роки тому

    I wish you would not speak in the present tense about the past. It is too disorienting, about what happened . But of course your agenda is to frighten your listeners about what humans are doing to the climate, and that is not your job. Imagine having to listen to such propaganda while trying to listen to science. You've lost me.

  • @hoplitecenturion9441
    @hoplitecenturion9441 2 роки тому

    I can't hear you.

  • @broderp
    @broderp 2 роки тому

    What happened to the volume?

  • @abemusselman9845
    @abemusselman9845 2 роки тому

    You're a great lecturer! Thanks for doing these

  • @hogdaddy3768
    @hogdaddy3768 2 роки тому

    Bottom smasher

  • @illuser_3318
    @illuser_3318 2 роки тому

    Thanks bro

  • @clusterfer
    @clusterfer 2 роки тому

    Can't hear the lecture, let alone the student questions.

  • @potohbab8056
    @potohbab8056 2 роки тому

    @thomas Evans what is the most interesting fact about fishes?

    • @thomasevans3387
      @thomasevans3387 2 роки тому

      Hmmmmm, one random interesting fact? Hard to do since there are so many. I think the one that gets people thinking most though is that humans are classified as lobe-finned fish.

  • @tl9150
    @tl9150 2 роки тому

    “You’re both good and evil at different times.” 11:55 Preach! Really important observation to make, thank you. I’ve seen firsthand fine people or groups of people villainized in a classroom setting by the teacher. Excellent insight to share with the kids.

    • @thomasevans3387
      @thomasevans3387 2 роки тому

      Yes it's important to remember we are part of the problem too. To address these challenging problems we have to work together.