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Bacterial diversity in Icelandic cold spring sources and in relation to the groundwater amphipod Crangonyx islandicus

Bacterial diversity in Icelandic cold spring sources and in relation to the groundwater amphipod Crangonyx islandicus


Title: Bacterial diversity in Icelandic cold spring sources and in relation to the groundwater amphipod Crangonyx islandicus
Author: Gudmundsdottir, Ragnhildur   orcid.org/0000-0003-0145-5122
Kreiling, Agnes-Katharina   orcid.org/0000-0001-5378-2331
Kristjánsson, Bjarni Kristófer
Marteinsson, Viggó   orcid.org/0000-0001-8340-821X
Palsson, Snaebjorn   orcid.org/0000-0002-4297-3500
Date: 2019-10-02
Language: English
Scope: e0222527
University/Institute: Háskóli Íslands
University of Iceland
Háskólinn á Hólum
Hólar University College
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Department: Líf- og umhverfisvísindadeild (HÍ)
Faculty of Life and Environmental Sciences (UI)
Fiskeldis- og fiskalíffræðideild (HH)
Department of Aquaculture and Fish Biology (HUC)
Matvæla- og næringarfræðideild (HÍ)
Faculty of Food Science and Nutrition (UI)
Series: PLOS ONE;14(10)
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0222527
Subject: Bacteria; Iceland; Crangonyx islandicus; Marflær; Gerlar; Vistfræði
URI: https://hdl.handle.net/20.500.11815/1904

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Citation:

Guðmundsdóttir R, Kreiling A-K, Kristjánsson BK, Marteinsson VÞ, Pálsson S (2019) Bacterial diversity in Icelandic cold spring sources and in relation to the groundwater amphipod Crangonyx islandicus. PLoS ONE 14(10): e0222527. https://doi.org/10.1371/journal.pone.0222527

Abstract:

Crangonyx islandicus is a groundwater amphipod endemic to Iceland, considered to have survived the Ice Ages in subglacial refugia. Currently the species is found in spring sources in lava fields along the tectonic plate boundary of the country. The discovery of a groundwater species in this inaccessible habitat indicates a hidden ecosystem possibly based on chemoautotrophic microorganisms as primary producers. To explore this spring ecosystem, we assessed its microbial diversity and analysed whether and how the diversity varied between the amphipods and the spring water, and if was dependent on environmental factors and geological settings. Isolated DNA from spring water and from amphipods was analysed using metabarcoding methods, targeting the 16S rRNA gene. Two genera of bacteria, Halomonas and Shewanella were dominating in the amphipod samples in terms of relative abundance, but not in the groundwater samples where Flavobacterium, Pseudomonas and Alkanindiges among others were dominating. The richness of the bacteria taxa in the microbial community of the groundwater spring sources was shaped by pH level and the beta diversity was shaped by geographic locations.

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This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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