Dung beetles provide a surprisingly wide range of ecosystem services, from recycling nutrients and improving soil structure to suppressing livestock parasites and even reducing greenhouse gas emissions. Their economic value to the U.S. cattle industry alone has been estimated at $2 billion annually, and to the U.K. cattle industry at roughly £367 million per year. These small insects punch far above their weight in keeping pastures productive and ecosystems functioning.
Nutrient Recycling Into Soil
The most fundamental service dung beetles provide is moving nutrients from dung pats into the soil where plants can actually use them. Without beetles, a dung pat sitting on the surface loses much of its nutritional value to the atmosphere and rain runoff before it ever reaches root zones. Beetles accelerate this process dramatically by breaking apart dung and burying it, increasing nutrient concentrations in the top 10 centimeters of soil beneath the pat.
The speed of this transfer matters. Within the first 14 days after dung is deposited, roughly 42% of the water-extractable organic carbon, 46% of the phosphorus, and 65% of the ammonium nitrogen can be lost from an unprocessed pat. Dung beetles intercept those nutrients before they disappear, pulling them underground where they become available to plant roots and soil microorganisms. At Oregon State University, researchers have documented that beetles can bury dung into the soil within four to five days. Without them, dung deposits may sit on the surface for three to twelve months in warmer climates.
Soil Structure and Water Infiltration
As beetles dig beneath dung pats to bury their food and lay their eggs, they create networks of tunnels that reshape soil structure. These tunnels improve water infiltration, allowing rain to soak into the ground rather than running off the surface. They also increase soil aeration, which promotes healthy root growth and supports the microbial communities that drive further nutrient cycling.
This tunneling is especially valuable in arid landscapes. In dry environments, nutrients sitting on the parched soil surface are largely unavailable to plants and tend to be lost through evaporation. Beetles with tunneling behavior push organic matter and microbial activity into deeper soil layers, where moisture persists longer and plants can access it. Research has shown that tunneling beetles are particularly effective at promoting microbial respiration in those deeper layers, essentially jumpstarting biological activity where it’s needed most.
Pasture Productivity and Forage Availability
Livestock avoid grazing near dung deposits. The smell and the coarse, overgrown grass that develops around an uncleared pat make that patch of pasture effectively unusable. Over time, this “fouling” can take a meaningful percentage of grazing land out of production. By breaking down and burying dung quickly, beetles keep more of the pasture available for grazing while simultaneously fertilizing it.
The contrast is stark: a pasture with healthy beetle populations recycles dung in days, while one without beetles accumulates months’ worth of crusty, avoided dung pats that choke out usable forage. The nutrients beetles deliver underground, including nitrogen, phosphorus, calcium, and magnesium, promote grass regrowth in those same spots, turning what would be dead zones into some of the most fertile patches in the field.
Pest and Parasite Suppression
Dung pats are breeding grounds for flies and parasitic worms. By burying or disrupting the dung, beetles destroy the habitat these pests depend on. Evidence from Australia shows that enhanced dung beetle populations can meaningfully reduce populations of pest fly species, particularly the bush fly, which is a major nuisance for both livestock and people.
The picture is more nuanced for gastrointestinal parasites like nematodes. While beetles do disrupt the life cycle of these worms by burying contaminated dung, reductions in actual parasite burdens in grazing animals have only been documented with large tunneling species that bury dung 15 centimeters or more below the surface. Smaller beetles that stay closer to the surface don’t push parasites deep enough to prevent them from reaching pasture grasses. The overall role of dung beetles in nematode control may have been somewhat overestimated in past assessments, though their contribution to fly suppression remains well supported.
Greenhouse Gas Reduction
Cattle dung releases methane and nitrous oxide as it decomposes, both potent greenhouse gases. Dung beetles reduce these emissions by aerating the pat, speeding up drying, and changing the microbial environment inside it. A study published in Nature’s Scientific Reports found that beetle activity reduced methane emissions from individual dung pats by 14.5% and nitrous oxide emissions by 2%, resulting in an overall 7% reduction in carbon dioxide equivalents over a pat’s 59-day lifecycle.
Scaled across millions of cattle and billions of dung pats deposited each year, even a modest per-pat reduction adds up. This service has drawn increasing attention as agriculture looks for ways to lower its carbon footprint without changing livestock numbers.
Secondary Seed Dispersal
Many plants rely on animals to eat their fruit and deposit seeds in dung. But seeds left sitting on the soil surface in a dung pat face heavy predation from rodents and other seed-eaters. Dung beetles provide a second stage of dispersal by burying those seeds underground as they process the dung. In tropical forest experiments, over half of intact seeds found in beetle-processed dung had been buried by the beetles.
This burial protects seeds from predators and, depending on depth, can promote germination by placing seeds in moist soil with a packet of fertilizer. Beetles also spread seeds horizontally as rolling species move dung balls away from the original pat, reducing the clumping that makes seedlings compete with each other. The effect varies by seed size and burial depth: too deep and the seedling can’t reach the surface, but at the right depth, beetle-buried seeds germinate at higher rates than those left exposed.
How Different Beetle Types Contribute
Not all dung beetles provide the same services. The three main functional groups, tunnelers, rollers, and dwellers, contribute in distinct ways. Tunnelers dig below the dung pat and bury portions underground. They are the most efficient group for soil nutrient cycling, dung removal, and seed dispersal, and large tunneling species are the only ones shown to suppress parasitic nematodes effectively. Rollers shape dung into balls and move it away from the pat horizontally, spreading nutrients and seeds across a wider area. Dwellers spend their entire life cycle within the dung pat itself, contributing to decomposition but doing less to move material into the soil.
Research on Scandinavian dung beetle communities found that both body size and nesting strategy influence which services a species provides. Larger tunnelers tend to be the most effective multitaskers, but they’re also the most sensitive to extinction. Methane emissions from dung pats varied primarily with beetle body mass, while nutrient recycling depended more on nesting strategy. This means losing large tunneling species from an ecosystem doesn’t just reduce one service; it can diminish several simultaneously.
Threats From Livestock Medications
The very livestock that dung beetles depend on can poison them. Ivermectin, a widely used deworming drug in cattle, passes through the animal and remains active in its dung. Experimental studies in Eastern Ethiopia found that dung from ivermectin-treated cattle contained an average of 0.5 beetles per pat, compared to 9.4 beetles in untreated dung. Beetles that initially colonized treated dung moved away to untreated pats, and larval development inside treated dung was severely impaired.
The effects ripple outward. Treated dung showed fewer beetle tunnels extending into the ground, reduced fly colonization, and slower decomposition. A single standard dose of ivermectin at 0.2 mg per kilogram of body weight was enough to cause beetle mortality in fresh dung, with reduced but persistent effects lasting several weeks. Because ivermectin also inhibits the flies and larvae that help break down dung, the drug essentially stalls the entire decomposition process, undermining soil fertility and every downstream service beetles provide.
Economic Value to Livestock Industries
Putting a dollar figure on beetle services is difficult, but estimates are consistently large. In the United States, dung beetle contributions to pasture systems have been valued at $2 billion per year. In the United Kingdom, a detailed ecosystem services assessment estimated the value at £367 million annually, with conventional cattle systems accounting for £354 million and organic systems for £13 million. On a per-animal basis, beetles save organic farms about £43 per cow per year and conventional farms about £37 per cow.
These figures account for nutrient recycling that replaces purchased fertilizer, reduced pasture fouling, pest suppression that lowers veterinary costs, and improved soil health. Protecting beetle populations through agri-environment schemes could save the U.K. cattle industry an additional £40 million per year. Given that the total value of cattle manure produced in the U.K. is roughly £200 million annually, beetles are responsible for unlocking a substantial share of that manure’s potential value that would otherwise be lost.