One crab can swallow over 1,000 seeds in a night, study finds

A single crab can consume over 1,000 seeds in a single night, according to a recent study. Forest regeneration relies heavily on small invertebrates like earthworms, slugs, beetles, crickets, and freshwater crabs, not just larger animals like birds and mammals. These tiny creatures aid in seed dispersal in a process known as invertebrate endozoochory, where the seeds pass through their digestive systems intact and are deposited in new locations where they can sprout.

This previously overlooked form of seed dispersal is widespread in various ecosystems, including Oceania, Asia, Europe, and North America. Researchers from the University of Hong Kong, along with scientists from other institutions worldwide, analyzed 43 studies and found that invertebrates disperse seeds much more frequently than previously thought.

Some plants have even evolved traits specifically suited for invertebrate seed dispersal, such as small, hard seeds in dull-colored fruits near the forest floor, attracting slugs, beetles, and other small animals. Despite their minuscule size, these ground-dwelling invertebrates significantly contribute to plant reproduction and biodiversity, making them crucial allies in forest regeneration.

Conservation efforts should consider these small but vital organisms, as the loss of larger animals due to habitat loss and other factors could further threaten natural forest regeneration.