SAMN37676676
External Id
University College Dublin
INSDC center name
2023-10-06T00:00:00Z
INSDC first public
2023-10-06T10:07:27.812Z
INSDC last update
live
INSDC status
Metagenome or environmental
NCBI submission model
Metagenome.environmental.1.0
NCBI submission package
ERS17033076
SRA accession
2012-07
collection_date
Whilst invasive plants can modify community and ecosystem attributes, there is little information on their impact at different trophic levels. Here, we examined the effects of Gunnera tinctoria on the soil detrital food chain, the major pathway for energy flow in terrestrial ecosystems and the recycling of nutrients. Measurements of the natural abundances of C and N isotopes, and assessments of soil microbial populations show that G. tinctoria drives the soil food web and that C is rapidly transferred from decomposing litter to worm populations. Based on the C isotope compositions of plant material and detritivorous worms (i.e., earthworms and enchytraeid worms), all worms contribute to G. tinctoria litter decomposition, irrespective of their feeding preference. The increased role of larger earthworms in litter decomposition was also associated with changes in the soil microbial community, with some bacterial genera absent from invaded areas. Of particular interest was a three-fold increase in Nitrospira spp. in invaded areas, likely due to an increase in earthworm-related ammonia production, with this being rapidly converted to nitrate. Given the poor representation of other ammonia and nitrite oxidizing soil bacteria, many of the Nitrospira spp. present in invaded soils may perform complete ammonia oxidation (i.e., COMAMMOX). Our results indicate a greater role of earthworms in decomposition processes in areas invaded by G. tinctoria, resulting in modifications in the other soil biota and an increase in soil nitrate.
description
Ireland: Dooega Beach, Achill Island, Mayo
geo_loc_name
soil
isolation_source
53.51 N 9.55 W
lat_lon
soil metagenome
http://purl.obolibrary.org/obo/NCBITaxon_410658
organism
MIcrobiome from Gunnera-invaded soil
title