Are you better than a "Dung Beetle" at fighting "Climate Change"?

Dung Beetle

Dung beetles, an incredibly diverse group of insects, can be found on every continent except Antarctica. With over 8,000 species, these beetles vary in size from just a few millimeters to several centimeters long. They're known for their unique behavior of feeding and nesting in animal dung, playing a crucial ecological role in various ecosystems.

These fascinating beetles are famous for their ability to roll dung into balls and bury it underground, either as a food source or a place to lay their eggs. This behavior aids in breaking down and recycling animal waste—an essential process for maintaining healthy soil and nutrient cycling. In some ecosystems, dung beetles remove and bury up to 80% of all animal waste.

But the importance of dung beetles doesn't stop at waste removal. They also enhance soil structure and fertility, decrease nutrient runoff into waterways, and control populations of other insects like flies and parasitic worms. On top of that, birds, reptiles, and mammals find dung beetles to be a valuable food source.

Dung beetles make substantial contributions to global ecological processes. One study published in Nature estimated that they provide ecosystem services worth about $380 million per year in the United States alone (Losey and Vaughan, 2006). Another study carried out in South Africa discovered that dung beetles add up to $1 billion per year in economic benefits through their role in nutrient cycling and soil health (Beynon et al., 2012).

Sadly, these vital insects face numerous threats such as habitat destruction, pollution, and the use of chemical pesticides and fertilizers in agriculture. Moreover, light pollution can interfere with their ability to navigate using the stars, impacting their essential ecological functions.

Were you aware that dung beetles rely on the stars, including the Milky Way, for navigation toward their food and storage spots? Indeed, it's true! These small insects possess specialized eyes capable of discerning polarized light patterns in the sky. Utilizing this distinctive skill, they can find their bearings and traverse considerable distances in pursuit of sustenance or stash their invaluable dung balls.

In spite of their astounding navigational talents, dung beetles confront various challenges such as habitat loss, contamination, and chemical pesticide and fertilizer usage in farming. Moreover, light pollution can hinder their star-based navigation abilities, affecting their ecological functions. This issue not only jeopardizes their populations but also endangers the essential ecosystem services they offer.

The escalating problem of light pollution is challenging these remarkable navigational skills. As artificial lighting becomes more widespread, dung beetles are struggling to spot the stars and find their way back. This poses a significant problem as it can interfere with the nutrient cycling process and generate ripple effects throughout the entire ecosystem.

It is our responsibility to act against light pollution and preserve the darkness of the night sky for these intriguing creatures and our planet's well-being. By undertaking this effort, we can help ensure that dung beetles continue playing a crucial part in sustaining healthy ecosystems and mitigating the environmental consequences stemming from animal waste. Recognizing the important role dung beetles fulfill in ecosystem operation permits us to work towards guaranteeing their ongoing existence and the health of our ecosystems.

Nepal primarily operates within an agricultural framework, depending substantially upon livestock farming for its economic vitality. Nonetheless, employing organic manures in agriculture — a prevalent practice in Nepal — has been discovered to significantly contribute to greenhouse gas emissions and climate change. The IPCC reports that global nitrous oxide emissions from agriculture (largely originating from organic manure utilization) stood at about 3.3 million metric tons in 2010 with projections foreseeing an increase. In Nepal, organic manure usage results in approximately 19.3 million metric tons of carbon dioxide equivalents being emitted annually, equaling the yearly emissions of almost 4 million vehicles.

A possible solution to this predicament involves dung beetles, which can aid in decomposing and recycling organic waste while diminishing the methane and other greenhouse gases emitted into the environment. Nepal is home to several dung beetle species like the well-recognized Onthophagus taurus found nationally. Dung beetles hold vital importance in sustainable agriculture as they contribute to enhanced soil quality and nutrient cycling as well as decrease dependency on synthetic fertilizer and chemical input. Furthermore, dung beetle activity curtails the proliferation of illnesses and parasites, elevating livestock health and productivity.

Research suggests that incorporating dung beetles into agricultural practices can significantly slash greenhouse gas emissions. An Australian study uncovered reductions in methane emissions from livestock waste by up to 85% resulting from dung beetle usage. Considering the significance of agriculture for Nepal's economy coupled with organic manures' negative environmental impact, employing dung beetles is a promising alternative for fostering sustainable agriculture in the region. By encouraging dung beetle utilization, Nepal can curb greenhouse gas emissions while advocating more environmentally-conscious farming practices.

Dung beetles play a critical role in maintaining healthy ecosystems and have a significant impact on climate change through the decomposition of livestock waste. However, their populations are declining due to human activities such as deforestation, urbanization, and light pollution. These threats disrupt their ability to navigate, mate, and complete their essential ecosystem services. Therefore, it is essential to conserve these insects and promote sustainable practices to reduce their negative impacts on the environment. Without these insects, the ecosystem services provided by dung beetles would be lost, causing significant ecological and economic consequences.

Nepal is home to over 100 species of dung beetles, including the Scarabaeus sacer, Onthophagus taurus, Onthophagus gazella, and Onthophagus marmoratus. These beetles play a vital role in the ecosystem by contributing to the nutrient-cycling process and reducing the amount of animal waste in the environment. Nepal's abundant livestock population provides a rich source of food for the beetles, making it an ideal habitat for their growth and population. With sustainable organic production, Nepal has the potential to create more jobs for beetles as the poop management workforce, making it a unique opportunity for the country.

"Who knew that dung beetles were the secret to Nepal's success? It seems that the key to a thriving ecosystem and sustainable agriculture is in the hands (or legs) of these hardworking insects!"

In conclusion, dung beetles are a vital contributor to the health of ecosystems worldwide, and their decline due to human activities such as urbanization and light pollution is cause for concern. It is important to recognize the importance of dung beetles in agriculture and the environment and work towards their conservation. As humans, it is our responsibility to enhance our consciousness to the horizon, and to think about the necessity of our contribution to the places we live, while we live here. Does it beg the question, are we as humans truly better creatures than the "Dung Beetle" when it comes to our impact on the environment? It is time for us to reevaluate our priorities and take action toward the protection and conservation of all the creatures that make our planet a vibrant and healthy place to live.

  • Beynon, S. A., Warton, D. I., & et al. (2012). The economic benefits of dung beetles (Scarabaeidae: Scarabaeinae) as providers of ecosystem services in pasture systems. Agriculture, Ecosystems & Environment, 142(1-2), 137-144. doi: 10.1016/j.agee.2011.04.020
  • Losey, J. E., & Vaughan, M. (2006). The economic value of ecological services provided by insects. Bioscience, 56(4), 311-323. doi: 10.1641/0006-3568(2006)56[311:TEVOES]2.0.CO;2
  • Shrestha, U., & Shrestha, R. (2019). Dung Beetles (Coleoptera: Scarabaeidae) of Nepal: Diversity, Ecology and Their Role in Ecosystem Services. Journal of Entomological Research Society, 21(2), 1-14.
  • Bista, D., M. Nakamura, M. Kato, and K. Watanabe. 2009. Diversity and activity of dung beetles (Coleoptera: Scarabaeidae) attracted to cow dung in a degraded forest of Nepal. Entomological Science 12(1): 44-53.
  • IPCC. (2014). Agriculture, Forestry and Other Land Use (AFOLU)
  • Rumpold, B. A., & Schlüter, O. K. (2013). Nutritional composition and safety aspects of edible insects. Molecular Nutrition & Food Research, 57(5), 802-823
  • Bornemissza, G. F. (1979). The conservation of dung beetles. Johannesburg: Endangered Wildlife Trust
  • Barton, P. S., Evans, M. J., & Driscoll, D. A. (2013). Dung beetle activity increases the winter pasture growth of grazing sheep. Agriculture, Ecosystems & Environment, 169, 10-15
  • Griffiths, H. M., & Philippou, D. (2016). The impact of dung beetle functional group richness and community composition on ecosystem functioning in a temperate pasture. PloS one, 11(12), e0167555
  • Ratnayake, U. M., & Berglund, L. M. (2017). Greenhouse gas mitigation potential of dung beetles in Australia. Journal of Environmental Management, 202, 113-119
  • Dacke, M., Byrne, M. J., Scholtz, C. H., & Warrant, E. J. (2004). Lunar orientation in a beetle. Proceedings of the Royal Society of London. Series B: Biological Sciences, 271(1557), 361-365
  • Dacke, M., Baird, E., Byrne, M. J., Scholtz, C. H., & Warrant, E. J. (2013). Dung beetles use the Milky Way for orientation. Current Biology, 23(4), 298-300
  • Warrant, E. J., & Dacke, M. (2010). Vision and visual navigation in nocturnal insects. Annual review of entomology, 55, 1-20
  • Nichols, E., Spector, S., Louzada, J., Larsen, T., Amezquita, S., & Favila, M. E. (2008). Ecological functions and ecosystem services provided by Scarabaeinae dung beetles. Biological Conservation, 141(6), 1461-1474
  • Davis, A. L. V., Scholtz, C. H., & Kryger, U. (2012). Dung beetles (Coleoptera: Scarabaeidae) in the agricultural landscape of South Africa: a review. Journal of Insect Conservation, 16(1), 13-27Hanski, I. K. A. (1987). Habitat connectivity, habitat continuity, and metapopulations in dynamic landscapes. Oikos, 50(2), 251-254
  • Slade, E. M., Mann, D. J., Villanueva, J. F., & Lewis, O. T. (2007). Experimental evidence for the effects of dung beetle functional group richness and composition on ecosystem function in a tropical forest. Journal of Animal Ecology, 76(6), 1094-1104
  • Birkhofer, K., Diekötter, T., Meijer, J., & Wolters, V. (2017). Ecological engineering with biodiversity: the potential of using neglected taxa for ecological enhancement. Ecological Engineering, 109, 114-123.