5 Ways Humans Are Influencing Species Evolution
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- Опубликовано: 28 май 2022
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Evolution is a never ending process, but there are some cases where humanity has given it a big push.
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Sources:
academic.oup.com/jue/article/...
journals.plos.org/plosone/art...
www.smithsonianmag.com/smart-...
www.ncbi.nlm.nih.gov/pmc/arti...
www.ncbi.nlm.nih.gov/pmc/arti...
research.uga.edu/news/when-co...
www.ncbi.nlm.nih.gov/pmc/arti...
link.springer.com/article/10....
www.researchgate.net/publicat...
www.smithsonianmag.com/smart-...
www.nature.com/articles/6884120
www.science.org/content/artic...
www.pnas.org/doi/full/10.1073...
www.ncbi.nlm.nih.gov/pmc/arti...
phys.org/news/2016-01-intense...
www.storyblocks.com
en.wikipedia.org/wiki/File:C-...
commons.wikimedia.org/wiki/Fi...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/ph...
commons.wikimedia.org/wiki/Fi...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/vi...
en.wikipedia.org/wiki/File:Cu...
en.wikipedia.org/wiki/File:Cu...
en.wikipedia.org/wiki/File:Bl...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/ph...
www.storyblocks.com/video/sto...
www.gettyimages.com/detail/ph...
en.wikipedia.org/wiki/File:Es...
en.wikipedia.org/wiki/File:No...
www.gettyimages.com/detail/vi...
commons.wikimedia.org/wiki/Fi...
en.wikipedia.org/wiki/File:MA...
en.wikipedia.org/wiki/File:Ov...
www.gettyimages.com/detail/il...
www.gettyimages.com/detail/ph...
www.gettyimages.com/detail/ph...
This reminds me of a plant that is over harvested in the mountains of China. It used to be easier to find because of its brilliant color but then due to its popularity as a traditional medicine and the over harvest of it, those that remain in human accessible areas have changed color to camouflage with their surroundings. This change is not reflected in their counterparts in less easily accessible areas for humans. I forget the name of the plant though but I remember seeing this bit of news and found it interesting.
Elephants losing their tusks is another important example.
I’d love to know if there was a study on the rattlesnakes in texas! I was struck by the anecdote that yearly rattlesnake hunts that find the snake because of the rattle were selecting for snakes with no rattle at all, which ironically makes their cattle and kids LESS safe because they take away the snake’s ‘alarm bell’.
Yet, there's still people out there that doubt evolution, where they could measure it by themselves.
Bacteria evolving to process plastic is something I’m curious as to what effect it will have in thousands of years. Will those bacteria eventually become gut bacteria making it possible for some termites or rodent to eat plastic?
Here for continued support of Michael's hair "evolution" into decidedly, firmly, metal territory. Not sure if I miss the highlights, yet.
Great video. The hunting/ fishing of the biggest and healthiest made me think about natural selection of predators, where they typically hunt the weakest and cull the herd of the weak and sickly. Sport hunting creates the opposite effect.
Every time I kill a slow mosquito I shed a tear at the thought that I judt naturally selected for faster mosquitos.
Don't forget, the increased interactions between wild animals, domesticated animals, and us humans are fueling a lot of viral evolution. Didn't think we needed a reminder of that after the last two years, but we're probably getting more of those kinds of reminders in the coming decades anyway. Hang on for the ride, everyone!
If Michael doesn't do every ad from here on out, we all collectively agree to riot.
1:23
Australian White Ibis is also known locally as a Bin Chicken in cities.
The same size reduction ( or absent) is happening with elephant tusks.
I saw this happen with the whitetail deer in the region where I grew up. The state [Montana] started allowing more Outfitters [professional hunting guides] in, to draw in more out-of-state hunters and their money.
At least in South Florida, where I live, local white ibises have learned that human lawns are a great place to probe for earthworms and insect grubs. I often see them parading across people's lawns and through gardens doing just this.
In Australia the Ibis is known as the "Bin Chicken"
In my state, there are rural areas where the local landownder/hunters have taken to ignoring the conservation department's regulations. Instead of taking the larger antlered bucks, they try to determine the buck's age, and cull the older bucks with smaller racks. I first heard about this 20 years ago but I'm sure it's been going on for longer, and now the biggest bucks in my state are all coming from these areas. It does require cooperation from all the landowners in the area, in order to ensure that the most well-endowed bucks survive to reproduce. It also requires a degree of secrecy, since they are technically committing a crime every time they take a buck with an undersized rack.
I encountered deer, turkeys, rabbits, groundhogs and bears while in upstate NY. The bears mostly stayed in the tree line but everything else you could find out on the road at night and into early morning. Even stranger was that they wouldn't run away most of the time. Now I mostly just see the usual possums, squirrel, geese, raccoons, ducks and maybe an occasional escaped farm animal like chicken or goat.
I wish there was a bit in this about rattlesnakes! I heard that rattle snakes have been naturally selected to not rattle before striking; the snakes that expose themselves ended up killed since humans hate snakes... I would love to see if anyone's done a real study on it or if this is just an urban legend.
Maybe that's part of why some ancient cultures made myths about the largest and strongest of a species, saying to show it respect. When you hunt those ones you hurt your future hunting options