3 ms·
I'd expect that kind of rhetoric from one of you lumpers. Seriously though, the more I learn about speciation, the more I realize how imperfect our system is a
by msrenee 5y ago
I'd expect that kind of rhetoric from one of you lumpers.
Seriously though, the more I learn about speciation, the more I realize how imperfect our system is at categorizing life. Obviously lots of cases are pretty clear-cut, but there's so many examples where you almost have to treat every population as its own distinct entity.
My definition of species honestly changes depending on the context. For conservation efforts, if you don't look at the separation and genetic distinctness between populations which would happily interbreed if it weren't for geographical restraints, you're liable to lose both genetic diversity and location-specific genetic adaptations that may be present in one population. For human evolution, I don't know what it really matters whether we call it one species or twelve. It's a very artificial system that will never be 100% agreed upon by experts. Being hominid fossils, they'll be studied intently down to the tiniest sliver of bone no matter where they're placed taxonomically. We all like nice, neat categories, but life is much messier than our naming system wants it to be and I'm not sure I really care where we draw these lines. If I'm missing a good reason for it, please educate me.
- Retric 5y agoIMO, experts will understand any popular system and are happy to use multiple systems in different contexts. So, really it’s non experts who benefit from clear an consistent labeling. In respect to species the least ambitious definition is groups of related organisms that exchange genetic information. Ring species for example can exchange beneficial mutations from the edges of each branch through intermediaries. https://en.wikipedia.org/wiki/Ring_species https://en.wikipedia.org/wiki/Ring_species In that context hominids may have had many distinct populations based on survival skills for their local environment and geographic barriers which is enough for adaption to local conditions to take place, but exchanges between groups would still genetically link distant populations across thousands of generations. A<>B<>C<> … Y<>Z For example it’s extremely unlikely that nobody crossed the Bering Strait even just from 1,000 BC to 1BC. Let alone 10,000 BC to 1492.