How do seeds migrate 2.7 million kilometers? Turning into bird excrement is not the best!

Bufeng was a pioneer of natural history in France, and he came to some laws through his observation of living things – although the physical environment is similar, there will be different species in different geographical areas. As an old Chinese saying goes, no matter how big the forest is, no matter how many birds there are, there will always be something you haven’t seen before. On the whole, there is nothing wrong with his view.

After visiting Australia and the Pacific Islands, Captain Cook and barkers first classified the geographical differences of plants in the world through species composition diversity, which further confirmed the view of Bufeng. The first is the well-known sweet potato. Sweet potato is a plant native to the Caribbean region of America. But when the captains drifted to the South Pacific, they found that this plant also existed. We all have a lot of explanations for this. Sweet potatoes should have come here from America by themselves. At least they are not transported by people.

Finally, under the study of geographers, it was found that through ocean currents, sweet potato seeds could float on the sea for a long time, and through analysis, it can be determined that it crossed the Pacific Ocean and Indian Ocean from the west coast of America many years ago, and reached the present-day beach of magarska.

Therefore, we can understand that the seeds of these plants are floated by the sea. If you live in the coastal areas of China or Japan, when you run to the sea to see the sea, you will find a lot of cross flowing water.

The most recent series of typhoons are tropical cyclones. Typhoons, hurricanes and tropical cyclones are also the disseminators and carriers of plant seeds. For this example, you can see a kind of grass in the tropics. The grass is asexual, and there’s no way to wait for pollination in the growing season – it just drifts far away with the wind, which can be said to be a temperate zone according to the geographical and climatic boundaries, but it still survives.

In addition to strong winds and ocean currents, one of the most common ways is through birds. The simple ride through the wind and waves makes the lovely seeds reluctant. So in the meantime, plant seeds travel around the world through bird droppings or feathers. For a simple example, through the study of the Hawaiian Islands, tropical and subtropical biological species are extremely rich. After that, the birds take in all kinds of fruits, digest them through their intestines, and finally excrete them in their habitats, so the plant seeds are brought to this place.

For example, some kind of blueberry should be one of the endemic plants in the Hawaiian Islands, so why do they also exist in Southeast Asia? The reason is that the poop of the migratory bird brings it here, and the migratory bird comes here from a long distance from the west of North America.

New species, complete geographical boundaries, and accidental diffusion behavior make people more able to imagine the macro changes of time scale, which is also very interesting at the micro level. With the accumulation of time, whether it is vicissitudes or a day of great changes, all these can make the plant seeds travel around the world. In the field of biology, the fact of long-distance migration and cross ocean travel has given scientists a new understanding of species division. With the further development of science and technology, more and more research means and methods have innovated human cognition. All the achievements have shocked the tradition of geography and biology one by one, just like everything in the world has become a firework that lights up the history through space.

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