Abundance, perceptions and utilizations of termite mounds in Cambodia

Abstract

In the Lower Mekong Basin, paddy fields often appear as mosaics, with soil mounds covered by trees or other plants in a spotty distribution. These soil mounds are commonly named termite 'lenticular mounds' because termite bioturbation is considered to be at their origin. Termite mounds host a large diversity of animals and plants, increasing landscape patchiness. Because the preservation of these islands of biodiversity is threatened by modern agricultural practices, the aim of this study was to quantify their abundance and the services they provide to the local population. The abundance of mounds and their use by the population were quantified in a catchment in Cambodia. We found that mounds density reached ~2 mounds ha −1 . Interviews carried out within the catchment showed that most of the interviewees used mounds for increasing the fertility of their field and for the cultivation of rice and other plants (e.g. sponge gourd and pumpkin).In addition to their potential to increase plant productivity, the survey revealed that animals (rats and snakes), mushrooms and 13 plant species found on or in mounds were consumed by the population. In addition to potentially contributing to an increase in food diversity, mounds also impacted farmers' health by allowing access to 20 medicinal plant species and indirectly via a reduction in pesticide use. In conclusion, this study is the first attempt to quantify the large number of services provided by termite mounds in Cambodia.

Soil health and ecosystem services

“…A study in Cambodia found that soil mounds originated from termite bioturbation host abundant soil animals and plant species (see Figure 4). The mounds were widely used by local farmers to increase the fertility of their rice fields (Muon et al, 2023). A global meta‐analysis shows that the presence of earthworms in agroecosystem increased crop yield by 25% (Van Groenigen et al, 2014).…”

“…Termite mounds in Lower Mekong Basin nested by abundant soil animals and plant species (Muon et al, 2023). …”

“…Food produced on unhealthy soil results in food of poor nutritional quality and jeopardizes human health (Gashu et al, 2021; Oliver & Gregory, 2015). Enhanced biodiversity can provide more fertile soil and more diverse food supply, as well as the cultivation of medicinal plant species (Muon et al, 2023). Moreover, soil pollution is increasingly ubiquitous due to industrial emission, as well as usage of fertilizers and pesticides (Jia & Hou, 2023; Sun et al, 2023).…”