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The Secret Life of Fungi and Animals

Discover the vital roles fungi play in animal survival.

Angie Macias, Brian Lovett, Michelle Jusino, Lauren Cole, Matt T. Kasson

― 7 min read


Fungi: Unsung Heroes of Fungi: Unsung Heroes of Animals survival and ecosystems. Explore fungi's crucial role in animal
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Fungi are not just those mysterious organisms you find in your fridge; they play a vital role in the lives of many animals. Whether it's food, hydration, protection, or a cozy place to live, fungi have got animal pals covered. Mycophagy, the fancy term for eating fungi, is quite common among animals, from mammals to insects. This little reported relationship shows just how important fungi are in the animal kingdom.

The Nutritional Benefits of Fungi

Fungi are like nutrition-packed snacks for animals, offering a buffet of essential nutrients. They are rich in fiber, amino acids, and proteins, along with carbs, phosphorus, and potassium. What’s more, they provide trace minerals like manganese, copper, zinc, and an especially noteworthy amount of selenium. Plus, with over 80% water, fungi are highly sought after in dry regions where hydration is crucial. Animals know a good deal when they see one!

Who's Eating Fungi?

You might be surprised to learn just how many animals munch on fungi. From mammals to insects and marine life, it's a wide variety. Species like birds, reptiles, amphibians, and even fish have been spotted hoarding fungi for their meals. Not to mention insects, which seem to have fungi as a popular food choice. The list goes on, including mollusks, crustaceans, arachnids, and many more. Even wood-eating termites and certain beetles have developed a taste for mushrooms.

Some animals are known as "obligate mycophages," meaning they rely on fungi for survival. Think of leafcutter ants that farm fungi like a gardener tending to plants. They have built entire lifestyles around these fungi! Other examples include wood wasps, which have developed specialized ways to benefit from fungi. Even certain types of beetles have made a living out of Fungus farming.

Fungi as Defenders

Fungi do more than just fill bellies; they can also protect animals. Some animals form partnerships with fungi to fend off predators or illness. These partnerships allow fungi to assist their animal hosts either by enhancing immunity, pushing out harmful bugs, or even by creating protective chemicals. Imagine having a shield of fungi to guard against threats!

Recent studies have showcased many clever ways animals use fungi to their advantage. For instance, wood wasps rely on specific fungi to keep nematodes at bay. Other creatures, like stinkbugs, get protective benefits when their eggs are guarded by fungi. And let's not forget burying beetles, using special yeasts to keep their food safe.

Millipedes: The Fungus-Lovers

Millipedes are another group that has a longstanding love affair with fungi. Most of them eat decaying plant matter, and fungi are an essential part of that diet. Yet, what's still a mystery is which fungi they prefer and how much they depend on them.

Only a handful of millipede species have been studied closely to understand their relationship with fungi. However, those studies suggest there’s much more to discover about these creatures. Some millipedes have certain fungi they seem to like more than others, but it's not well documented just yet.

Colobognatha Millipedes: The Understudied

Among millipedes, the Colobognatha group is exceptionally interesting but still quite understudied. Historically, they thrived millions of years ago, and despite their long history, they represent just a small segment of today's millipede species. What's fascinating is that they have unique feeding habits that set them apart from their fellow millipedes. Instead of munching on decaying matter, they have adapted to a diet mostly consisting of fungi.

These millipedes have some unique mouthparts that allow them to suck or scrape fungus. If you think about it, it's a pretty neat adaptation! They don’t have the strong jaws other millipedes use for chewing. In fact, their feeding style is so efficient that they consume fungi in ways that other species can't.

The Research Behind Millipede and Fungi Relationships

Despite their importance, the relationship between Colobognatha millipedes and fungi is not well understood. Researchers have worked hard to learn more about which fungi these millipedes consume and why. By investigating various millipede species, scientists have uncovered that many of them have specific fungi they depend on, although the details are still fuzzy.

One interesting finding is that millipedes have been found to carry fungi on their bodies. This opens up new questions about the role of fungi not just as food but potentially as part of a larger ecosystem where these millipedes play a significant role.

Researchers have been using advanced techniques to try and understand the diverse fungal communities associated with millipedes. By examining their diets through new DNA analysis methods, scientists are beginning to untangle the complex relationships these creatures share with their fungal friends.

New Insights from Research

Recent studies have shown that one particular millipede species, Brachycybe lecontii, is closely associated with a wide variety of fungi. This millipede has been found in various states, and researchers have begun to map where it feeds and the types of fungi it eats. Over 2,800 different fungal types have been linked to this species alone!

What's even more intriguing is that researchers discovered that the fungal communities differed based on where these millipedes lived. This suggests that they might be quite picky about their fungus and might adapt their diets depending on the local availability of different fungal species.

The Role of the Environment

Environmental factors such as geography play a significant role in shaping the types of fungi present in millipede habitats. Researchers have found that certain sites produced different fungal communities, reflecting the complex interplay between living organisms and their environment.

Even the sex of the millipede doesn’t seem to affect the fungi they eat much; it’s largely about what’s available in their habitat. So, it seems that millipedes are like picky eaters, but only when it comes to fungi!

The Mystery of Mutualism

One of the biggest questions lingering around the relationship between milipedes and their fungal friends is whether they form mutualistic partnerships. Mutualism is a win-win relationship, where both parties benefit. Researchers have noted certain fungal types that seem to be favored by Brachycybe lecontii, suggesting that there might be some underlying benefits.

However, the lack of concrete evidence makes it tricky. It’s possible that while they share a meal, there’s no significant mutualistic relationship, but that won’t stop researchers from digging deeper.

The Power of Community Science

Interestingly, many findings in recent studies have come thanks to community science. Websites like iNaturalist allow everyday people to observe and record their findings, contributing to the growing knowledge about millipedes and fungi.

This means that anyone can play a role in helping researchers understand these relationships better. The collaboration between scientists and citizen scientists has opened doors to new discoveries, allowing for the complete mapping of B. lecontii's habitats and its associated fungi.

Conclusion: A Hidden World

The world of fungi and its relationship with animals is a rich, hidden story waiting to be uncovered. Fungi are not just here for our pizza toppings; they are vital players in many ecosystems. From being a critical food source for many animals to providing them with protection, fungi are the unsung heroes of the animal kingdom.

Millipedes, particularly the Colobognatha group, reveal a fascinating story of adaptation and survival in a world that is still largely unexplored. As researchers continue to study these creatures and their fungal companions, we can expect to learn more about the intricate relationships that govern life on Earth.

In the end, fungi and their animal friends like millipedes remind us that nature operates in complex and surprising ways. Who would have thought a humble fungus could change the course of an animal’s life? Well, it turns out, they can! So next time you see a mushroom, just remember, there's a whole world of surprises hidden beneath its cap.

Original Source

Title: More fungi than legs: the first fungal microbiome for a fungus-eating millipede (Colobognatha)

Abstract: Fungi are widely consumed across the animal kingdom for nutritional and defensive benefits. Millipedes, among the first air-breathing land animals, were also among the first terrestrial fungivores. As detritus-eating omnivores, most millipedes regularly consume fungi. Millipede diets diverged [~]200 million years ago, when obligate fungivorous millipedes (subterclass Colobognatha) diverged from their detritivorous counterparts. Despite their global distribution and uncommon diet, little is known about the association between Colobognaths and the fungi they consume. In 2019, surveys of fungal communities associated with the Colobognath Brachycybe lecontii revealed associations with at least 176 genera of culturable fungi. Given the known biases of culture-based approaches, a more comprehensive survey of B. lecontiis fungal microbiome using amplicon sequencing was undertaken. In this study, we generated amplicon sequence data to look for associations between fungi and B. lecontii, and to determine if patterns of fungal diversity are millipede- or habitat-driven. Altogether, the fungal microbiome of B. lecontii encompassed 620 fungal genera and 100 orders. Despite much greater observed fungal diversity in the amplicon-based study, sampling was likely not sufficient to capture the full diversity of fungi associated with B. lecontii. Taxonomic and functional diversity were significantly influenced by site and colony, indicating that community structure is shaped by geography and habitat. It remains unknown whether these findings are representative of the larger patterns of fungal diversity for the entire millipede subterclass. Nevertheless, the obligate fungivorous lifestyle employed by these long-extant animals may provide important clues regarding fungal diversity and function.

Authors: Angie Macias, Brian Lovett, Michelle Jusino, Lauren Cole, Matt T. Kasson

Last Update: 2024-12-23 00:00:00

Language: English

Source URL: https://www.biorxiv.org/content/10.1101/2024.12.23.629787

Source PDF: https://www.biorxiv.org/content/10.1101/2024.12.23.629787.full.pdf

Licence: https://creativecommons.org/publicdomain/zero/1.0/

Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.

Thank you to biorxiv for use of its open access interoperability.

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