Species-level termite methane production rates

Termites consume substantial amounts of plant material across tropical and subtropical ecosystems. During the process of lignocellulose digestion, the symbiotic methanogenesis within termites’ guts produces the potent greenhouse gas methane (CH4). Termites contribute an estimated 1-5% of global CH4 emissions, with these estimates derived from the product of termite biomass and termite CH4 production rate per unit of termite biomass. However, termite CH4 production rates vary significantly across species, genus, family, and feeding group, yet our understanding of this variation remains poor. Here, we reviewed papers published from 1975 to 2021 to create a single consistently derived list of species-level termite CH4 production rates. We searched Google Scholar using two key words: termite AND methane. We only included studies that had measured termite CH4 production rates using the incubation method. For each eligible study, we extracted and tabulated termite CH4 production rates and oth..., We collected termite CH4 production rates from the literature, including both peer-reviewed articles and book chapters. Data gathering was conducted in October 2020 and updated in February 2022. We searched Google Scholar using two key words: termite AND methane. All 7,699 search results were screened for eligibility. We only included studies that had measured termite CH4 production rates using the incubation method, which involves sealing a known number of termites in serum or glass vials and incubating in the dark at a fixed temperature (generally between 25 to 30°C) for a fixed time period (generally ranging from 1 to 3 hours) (see the scheme presented in Bignell et al., 1997). The CH4 produced during the incubation was then measured using a gas chromatograph for all studies. Although incubation conditions, including vial volume, incubation time, and incubation temperature, varied slightly across studies, the reported termite CH4 production rates were generally comparable across spec..., ,