Effect of the earthworm, eisenia foetida (oligochaeta), on fluxes of volatile carbon and sulfur compounds from sewage sludge

Hornor, Sally G.; Mitchell, Myron J.

doi:10.1016/0038-0717(81)90078-x

Cited by 24 publications

(5 citation statements)

References 22 publications

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“…Several studies have indicated that earthworms do not emit methane (CH 4 ) (Hornor and Mitchell, 1981;Karsten and Drake, 1995;Drake and Horn, 2007;Š ustr and Š imek, 2009). It was therefore surprising that certain earthworms in Brazil, in particular Eudrilus eugeniae, were recently discovered to emit CH 4 in vivo (Depkat-Jakob et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Methanogenic food web in the gut contents of methane-emitting earthwormEudrilus eugeniaefrom Brazil

et al. 2015

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The anoxic saccharide-rich conditions of the earthworm gut provide an ideal transient habitat for ingested microbes capable of anaerobiosis. It was recently discovered that the earthworm Eudrilus eugeniae from Brazil can emit methane (CH 4 ) and that ingested methanogens might be associated with this emission. The objective of this study was to resolve trophic interactions of bacteria and methanogens in the methanogenic food web in the gut contents of E. eugeniae. RNA-based stable isotope probing of bacterial 16S rRNA as well as mcrA and mrtA (the alpha subunit of methyl-CoM reductase and its isoenzyme, respectively) of methanogens was performed with [ 13 C]-glucose as a model saccharide in the gut contents. Concomitant fermentations were augmented by the rapid consumption of glucose, yielding numerous products, including molecular hydrogen (H 2 ), carbon dioxide (CO 2 ), formate, acetate, ethanol, lactate, succinate and propionate. Aeromonadaceaeaffiliated facultative aerobes, and obligate anaerobes affiliated to Lachnospiraceae, Veillonellaceae and Ruminococcaceae were associated with the diverse fermentations. Methanogenesis was ongoing during incubations, and 13 C-labeling of CH 4 verified that supplemental [ 13 C]-glucose derived carbon was dissimilated to CH 4 . Hydrogenotrophic methanogens affiliated with Methanobacteriaceae and Methanoregulaceae were linked to methanogenesis, and acetogens related to Peptostreptoccocaceae were likewise found to be participants in the methanogenic food web. H 2 rather than acetate stimulated methanogenesis in the methanogenic gut content enrichments, and acetogens appeared to dissimilate supplemental H 2 to acetate in methanogenic enrichments. These findings provide insight on the processes and associated taxa potentially linked to methanogenesis and the turnover of organic carbon in the alimentary canal of methane-emitting E. eugeniae.

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Section: Introductionmentioning

confidence: 99%

Methanogenic food web in the gut contents of methane-emitting earthwormEudrilus eugeniaefrom Brazil

et al. 2015

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“…In yesteryears, a wide range of industrial sludges/wastes have been tested for their bioconversion into composts (Hartenstein et al, 1979;Horner and Mitchell, 1981;Dash and Senapati, 1986). Paper pulp has been suitably utilised to produce vermicompost.…”

Section: Industrial Wastesmentioning

confidence: 99%

Potential and possibilities of vermicomposting in sustainable solid waste management: a review

Gupta

Garg

2011

IJEWM

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Treatment of solid wastes using earthworms has been intensively investigated in recent years. Most of the agricultural, urban or industrial organic materials can be used for vermicomposting, ensuring that they do not contain toxic materials, which can harm the earthworms. The transformation of solid wastes into vermicompost is of double interest: a waste is converted into value-added product and it controls a pollutant that is a consequence of increasing population, urbanisation and intensive agriculture. This paper deals with the state of research on various aspects of vermicomposting process.

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“…The capacity of the microorganisms to endure the enteric condition of the gut of earthworm is very important 3 . The ingestion of microorganism's populations plays a major role in earthworm's nutrition by facilitating in the decomposition of organic materials, mostly the constituents which are the earthworms cannot utilize in their natural condition 9 . The oxygenlimited environment prevalent in the earthworm gut allows the ingested anaerobes to grow and secrete exoenzymes which help the degradation process of the complex organic materials 7,10 .…”

Section: Introductionmentioning

confidence: 99%

Diversity and Metabolic Potential of Earthworm Gut Microbiota in Indo-Myanmar Biodiversity Hotspot

Vabeiryureilai¹,

Mandal²,

Chawngthu³

et al. 2020

J Pure Appl Microbiol

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Earthworms are important members of the soil macrofauna that play a significant role in soil structure and fertility. However, there is scanty information on the earthworm gut microbial flora and their metabolic potential. In the present study, the diversity of the microbial community and their metabolic potential from the gut content of four different earthworm species from Indo-Myanmar Biodiversity Hotspot were collected and identified by standard methods. The microbial diversity and their metabolic potential were assessed by high throughput sequencing of V3-V4 region of 16S rRNA using Illumina technology. Analysis of microbial diversity was performed by QIIME software package v.1.8.0 with their metabolic potential by PICRUSt (v1.1) software package. A total of 3,36,047 processed sequences were obtained that generated 3686 operational taxonomic units (OTUs). Major bacterial phyla identified were Proteobacteria (47.1%), Firmicutes (38.9%), Actinobacteria (6.3%), Bacteroidetes (3.6%) and Cyanobacteria (1.1%). The abundant genera were Lysinibacillus (26.9%), Acinetobacter (21.2%), Pseudomonas (4.7%), Bacillus (3.8%), Staphylococcus (3.5%), Stenotrophomonas (1.1%) and Ralstonia (1%). The functional annotation of the metagenome revealed abundance of bacterial community associated with amino acid, carbohydrate as well as energy metabolism. Furthermore, the presence of enzymes involved in the process of denitrification and methanogenesis were also identified. This study gives insight into the gut microbial composition and their putative functional roles in the gut of tropical hilly earthworms. The study on forest and garden soil earthworm gut microbiomes might help us understand the role of these organisms in their respective ecosystems.

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Effect of the earthworm, eisenia foetida (oligochaeta), on fluxes of volatile carbon and sulfur compounds from sewage sludge

Cited by 24 publications

References 22 publications

Methanogenic food web in the gut contents of methane-emitting earthwormEudrilus eugeniaefrom Brazil

Methanogenic food web in the gut contents of methane-emitting earthwormEudrilus eugeniaefrom Brazil

Potential and possibilities of vermicomposting in sustainable solid waste management: a review

Diversity and Metabolic Potential of Earthworm Gut Microbiota in Indo-Myanmar Biodiversity Hotspot

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