Dataset Information

The role of dung beetle species in nitrous oxide emission, ammonia volatilization, and nutrient cycling.

ABSTRACT: This study evaluated the role of dung beetle species alone or associated under different species on nitrous oxide (N₂O) emission, ammonia volatilization, and the performance of pearl millet [Pennisetum glaucum (L.)]. There were seven treatments, including two controls (soil and soil + dung without beetles), single species of Onthophagus taurus [Shreber, 1759] (1), Digitonthophagus gazella [Fabricius, 1787] (2), or Phanaeus vindex [MacLeay, 1819] (3); and their assemblages (1 + 2 and 1 + 2 + 3). Nitrous oxide emission was estimated for 24 days, when pearl millet was planted in sequence to assess growth, nitrogen yield (NY), and dung beetle activity. Dung beetle species presented greater N₂O flow of dung on the 6th day (80 g N₂O-N ha^-1 day^-1) compared to soil and dung (2.6 g N₂O-N ha^-1 day^-1). Ammonia emissions varied with the presence of dung beetles (P < 0.05), and D. gazella had less NH₃^-N on days 1, 6, and 12 with averages of 2061, 1526, and 1048 g ha^-1 day^-1, respectively. The soil N content increased with dung + beetle application. Dung application affected pearl millet herbage accumulation (HA) regardless of dung beetle presence, and averages ranged from 5 to 8 g DM bucket^-1. A PCA analysis was applied to analyze variation and correlation to each variable, but it indicated a low principal component explanation (less than 80%), not enough to explain the variation in findings. Despite the greater dung removal, the largest species, P. vindex and their species combination, need to be more studied to get a better understanding about their contribution on greenhouse gases. The presence of dung beetles prior to planting improved pearl millet production by enhancing N cycling, although assemblages with the three beetle species enhanced N losses to the environment via denitrification.

SUBMITTER: Garcia CCV

PROVIDER: S-EPMC9981724 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

The role of dung beetle species in nitrous oxide emission, ammonia volatilization, and nutrient cycling.

García Carlos C V CCV Dubeux José C B JCB Martini Xavier X Conover Derick D Santos Erick R S ERS Homem Bruno G C BGC Ruiz-Moreno Martin M da Silva Izabela A G IAG Abreu Daciele S DS Queiroz Luana M D LMD van Cleef Flavia O S FOS Santos Mércia V F MVF Fracetto Giselle G M GGM

Scientific reports 20230302 1

This study evaluated the role of dung beetle species alone or associated under different species on nitrous oxide (N<sub>2</sub>O) emission, ammonia volatilization, and the performance of pearl millet [Pennisetum glaucum (L.)]. There were seven treatments, including two controls (soil and soil + dung without beetles), single species of Onthophagus taurus [Shreber, 1759] (1), Digitonthophagus gazella [Fabricius, 1787] (2), or Phanaeus vindex [MacLeay, 1819] (3); and their assemblages (1 + 2 and 1 ...[more]

PMID: 36864179

Similar Datasets

Project description:BackgroundFirmicutes have the capacity to remove excess nitrate from the environment via either denitrification, dissimilatory nitrate reduction to ammonium or both. The recent renewed interest in their nitrogen metabolism has revealed many interesting features, the most striking being their wide variety of dissimilatory nitrate reduction pathways. In the present study, nitrous oxide production from Bacillus licheniformis, a ubiquitous Gram-positive, spore-forming species with many industrial applications, is investigated.ResultsB. licheniformis has long been considered a denitrifier but physiological experiments on three different strains demonstrated that nitrous oxide is not produced from nitrate in stoichiometric amounts, rather ammonium is the most important end-product, produced during fermentation. Significant strain dependency in end-product ratios, attributed to nitrite and ammonium, and medium dependency in nitrous oxide production were also observed. Genome analyses confirmed the lack of a nitrite reductase to nitric oxide, the key enzyme of denitrification. Based on the gene inventory and building on knowledge from other non-denitrifying nitrous oxide emitters, hypothetical pathways for nitrous oxide production, involving NarG, NirB, qNor and Hmp, are proposed. In addition, all publically available genomes of B. licheniformis demonstrated similar gene inventories, with specific duplications of the nar operon, narK and hmp genes as well as NarG phylogeny supporting the evolutionary separation of previously described distinct BALI1 and BALI2 lineages.ConclusionsUsing physiological and genomic data we have demonstrated that the common soil bacterium B. licheniformis does not denitrify but is capable of fermentative dissimilatory nitrate/nitrite reduction to ammonium (DNRA) with concomitant production of N2O. Considering its ubiquitous nature and non-fastidious growth in the lab, B. licheniformis is a suitable candidate for further exploration of the actual mechanism of N2O production in DNRA bacteria and its relevance in situ.

Dataset Information

The role of dung beetle species in nitrous oxide emission, ammonia volatilization, and nutrient cycling.

Publications

The role of dung beetle species in nitrous oxide emission, ammonia volatilization, and nutrient cycling.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets