What's Earth's dominant species by mass?

(signoregalilei.com)

111 points | by surprisetalk 9 hours ago

15 comments

  • rinconrex 11 minutes ago

    What about Bristlemouths? [0] Estimated to be in the TRILLIONS, inhabiting 70% of the earth's surface. Even if they are small, I think they have Spruce and "Larches" pretty handily beat by biomass. Cyclothone upper estimates are quadrillions of fish[1]. Sorry, I think this article is off by about 3 orders of magnitude.

    [0]https://a-z-animals.com/articles/the-10-animals-with-the-hig...

    [1] https://en.wikipedia.org/wiki/Gonostomatidae

    • ortusdux 2 hours ago

      Facts I try not to think about:

      - More than 2/3rds of the world's avian biomass is poultry

      - There are more Panda Expresses than pandas (edit - in the wild)

    • GMoromisato 51 minutes ago

      Imagine you're an alien explorer. You visit Earth 25,000 krugs ago (51,304 Earth-years ago) and see a pretty standard ecological milieu: a wide variety of species, each adapted to its own little environment, no different than it was 50 million krugs before.

      You return today and see that one previously unremarkable ape-like species has spread out to all parts of the world and is even orbiting in little tin cans around the planet. Almost all wild terrestrial megafauna is gone and the megafauna that remains is raised by the "humans" in massive farms. They've converted forests and jungles into farms and cities, and they're spending vast amounts of energy to make silicon think.

      The fact that aliens have not nuked us from orbit out of sheer panic is, I think, strong evidence that we are alone in the galaxy.

      • 0cf8612b2e1e 32 minutes ago

        Does that strike you as an unusual path for an intelligent species to become space faring? We have yet to unlock the Singularity shortcut that leaves us with replicators and free energy.

        I would expect any civilization to exterminate or at least cull the creatures that pose a threat and to cultivate those that are tasty or useful.

        • kridsdale1 49 minutes ago

          Read Children of Time for a great exploration of this theme.

          • MrZander 34 minutes ago

            Or the aliens did the same thing we did?

            • micromacrofoot 32 minutes ago

              More likely just not seen yet, our furthest reaching signals are maybe 50 light years away at best... and that's if anyone's looking for the faintest of faint traces.

              The Milky Way is 100,000 light years in diameter.

              So don't worry, maybe someone will blip us out of existence someday.

            • niccl 1 hour ago

              In some book by P G Wodehouse (inventor of Jeeves the butler), one character says (out of nowhere) that all the humans on the planet could fit in a cubic hole 1/2 mile on each side. It took me a little while to convince myself that was true. It still is, apparently

              • divan 1 hour ago

                There was a great post on this subject by Tim Urban: https://waitbutwhy.com/2015/03/7-3-billion-people-one-buildi...

                • schnevets 1 hour ago

                  I usually say if every human being on the planet were placed in Texas, it would be less dense than Paris as an argument against an area being "too crowded", but this is an even more jarring comparison.

                  • DennisP 1 hour ago

                    Take food production into account and the planet looks a little more crowded.

                  • santadays 55 minutes ago

                    And we use one cubic mile of oil every year.

                    • GMoromisato 1 hour ago

                      Nightmare fuel for the next Terminator or Matrix sequel.

                    • gumby 2 hours ago

                      Famously, when asked about a god, J.B.S. Haldane allegedly said that if there is a god or gods, they must have an “inordinate fondness for beetles.”

                      • 0cf8612b2e1e 1 hour ago

                        There is a Discworld joke about this. After being introduced to the God of evolution, God shows off the magnum opus he has been developing, the cockroach.

                        • adammarples 1 hour ago

                          This is because when they would lay a sheet on the ground and shake the branches of a tree, they would often find more species of beetles than anything else. However, they may have been extrapolating a bit far from the few places they tried this.

                          • boston_clone 49 minutes ago

                            No, it’s because beetles have the most diversity of any animal order.

                            “The Coleoptera, with about 400,000 described species, is the largest of all orders, constituting almost 40% of described arthropods and 25% of all known animal species…”

                            First paragraph of the wiki article! https://en.wikipedia.org/wiki/Beetle

                        • NDlurker 1 hour ago

                          What would .2 billion tons of viruses look like? Or any large mass of viruses? Goopy? What color what it be? These are probably questions for an LLM

                          • WillAdams 1 hour ago

                            That was actually covered by Randall Munro of XKCD:

                            https://what-if.xkcd.com/80/

                            • jrapdx3 52 minutes ago

                              Excellently written, informative, entertaining and a bit scary. Oceans of slime yet viruses are so small. It is mind-blowing to think about.

                              • NDlurker 59 minutes ago

                                Haha of course it was! Thanks for the link.

                            • imzadi 1 hour ago

                              I feel like it might be bamboo, but they sort of skipped over grasses

                              • yorwba 1 hour ago

                                Grasses mentioned in the article: rice, wheat, maize and sugar cane. I think all of them likely beat the bamboos because there are too many different bamboo species, not a single dominant one.

                                • shevy-java 1 hour ago

                                  That's not necessarily grasses though. Rice is a Poaceae, https://en.wikipedia.org/wiki/Poaceae, so these are covered by the grass family - but grasses would be the non-eatable variants in the wild. See Wikipedia:

                                  https://en.wikipedia.org/wiki/Grass

                                  "The three major families of grasslike plants are true grasses (Poaceae), sedges (Cyperaceae), and rushes (Juncaceae)."

                                  So he at best only did the family Poacaea but where are the wild poaceae in his calculations?

                                  Tons of things are missing in that article.

                              • gkoenig 9 hours ago

                                It was fun and gave human written. Thanks for that!

                                • elevation 2 hours ago

                                  English words like "goodbye" are contracted from longer expressions after centuries of common use[0]. Reading your phrase "gave human written" made me wonder how this phrase would contract if it were still in use centuries from today.

                                  [0]: https://www.youtube.com/shorts/t2ew2UHaCuY

                                  • apsurd 2 hours ago

                                    funny that i didn’t think about it till i read your comment. and then realized i read the entire thing. checks out.

                                    on the other hand i don’t think I’m physically capable of reading the AI landing pages of every new product on HN.

                                  • TZubiri 55 minutes ago

                                    Should the wood of trees be counted? Its effectively dead cells of the plant, it'd be like counting the skin that we shed and sweep off the floor every weekend.

                                    The trees are cheating

                                    • schiffern 34 minutes ago

                                      If the dead cells were shed, I might agree! But they're not.

                                      This is like counting the dead skin cells that are still attached, which (sure enough!) does count toward animal biomass.

                                      • nkrisc 39 minutes ago

                                        It serves an important structural purpose for them. Similar to corals.

                                        • sophacles 35 minutes ago

                                          A lot of the wood is used for transporting water - vital to keeping the trees alive high up in the branches. And it is structural - so should we subtract 70% of the bone weight from a mammal since it is non-living structural support?

                                        • vlyan 1 hour ago

                                          >There are thousands of species of ants and termites, and just one species of human.

                                          that's rather debatable. unless, of course, you're an adherent of creationism.

                                          • pfdietz 1 hour ago

                                            It's talking about species that currently exist. As far as we know there is only one currently existing species in the genus Homo.

                                          • shevy-java 1 hour ago

                                            He did not calculate the weight of bacteria, archaea, viruses?

                                            I understand that they each individually are small, but they are literally everywhere - and include carbon too.

                                            • a3w 1 hour ago

                                              How come algae did not make the list?

                                              • nubinetwork 3 hours ago

                                                Was surprised not to see whales on the list

                                              • andai 2 hours ago

                                                Obligatory xkcd has a nice visualization of the land mammals by mass:

                                                https://xkcd.com/1338/

                                                • dhosek 1 hour ago

                                                  It’s nice to see he separated the sheep and the goats.

                                                • JoeAltmaier 8 hours ago

                                                  Anaerobic bacteria in rock underground. Because they inhabit cubic volume, not 2D surfaces, there can be no comparison.

                                                  • xboxnolifes 2 hours ago

                                                    I'm not sure what cubic volume vs 2D surfaces means to you, but these comparisons are by mass, not volume. Plus, anaerobic bacteria would only come up on top if you counted all of them as one species, which they are not.

                                                  • TZubiri 50 minutes ago

                                                    The same argument could be had for fish, since they inhabit the volume of water, instead of the thin land surface of earth.

                                                    • JoeAltmaier 38 minutes ago

                                                      They are in zones and layers, yes. But very very thinly spread. Most life in the ocean are withing the top 3 meters.