Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific
Deep waters represent the largest biome on Earth and the largest ecosystem of Costa Rica. Fungi play a fundamental role in global biogeochemical cycling in marine sediments, yet, they remain little explored. We studied fungal diversity and community composition in several marine sediments from 16 lo...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Frontiers Media S.A.
2020-11-01
|
Series: | Frontiers in Microbiology |
Subjects: | |
Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2020.575207/full |
id |
doaj-273f85f9403b4b6baa3c4dbf0408b44a |
---|---|
record_format |
Article |
spelling |
doaj-273f85f9403b4b6baa3c4dbf0408b44a2020-11-25T03:58:37ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2020-11-011110.3389/fmicb.2020.575207575207Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical PacificKeilor Rojas-Jimenez0Hans-Peter Grossart1Hans-Peter Grossart2Erik Cordes3Jorge Cortés4Jorge Cortés5Escuela de Biología, Universidad de Costa Rica, San José, Costa RicaInstitute for Biochemistry and Biology, University of Potsdam, Potsdam, GermanyDepartment of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Stechlin, GermanyDepartment of Biology, Temple University, Philadelphia, PA, United StatesEscuela de Biología, Universidad de Costa Rica, San José, Costa RicaCentro de Investigación en Ciencias del Mar y Limnología, Universidad de Costa Rica, San José, Costa RicaDeep waters represent the largest biome on Earth and the largest ecosystem of Costa Rica. Fungi play a fundamental role in global biogeochemical cycling in marine sediments, yet, they remain little explored. We studied fungal diversity and community composition in several marine sediments from 16 locations sampled along a bathymetric gradient (from a depth of 380 to 3,474 m) in two transects of about 1,500 km length in the Eastern Tropical Pacific (ETP) of Costa Rica. Sequence analysis of the V7-V8 region of the 18S rRNA gene obtained from sediment cores revealed the presence of 787 fungal amplicon sequence variants (ASVs). On average, we detected a richness of 75 fungal ASVs per sample. Ascomycota represented the most abundant phylum with Saccharomycetes constituting the dominant class. Three ASVs accounted for ca. 63% of all fungal sequences: the yeast Metschnikowia (49.4%), Rhizophydium (6.9%), and Cladosporium (6.7%). We distinguished a cluster composed mainly by yeasts, and a second cluster by filamentous fungi, but we were unable to detect a strong effect of depth and the overlying water temperature, salinity, dissolved oxygen (DO), and pH on the composition of fungal communities. We highlight the need to understand further the ecological role of fungi in deep-sea ecosystems.https://www.frontiersin.org/articles/10.3389/fmicb.2020.575207/fulldeep-seaaquatic fungibiodiversityMetschnikowiaCosta Rica |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Keilor Rojas-Jimenez Hans-Peter Grossart Hans-Peter Grossart Erik Cordes Jorge Cortés Jorge Cortés |
spellingShingle |
Keilor Rojas-Jimenez Hans-Peter Grossart Hans-Peter Grossart Erik Cordes Jorge Cortés Jorge Cortés Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific Frontiers in Microbiology deep-sea aquatic fungi biodiversity Metschnikowia Costa Rica |
author_facet |
Keilor Rojas-Jimenez Hans-Peter Grossart Hans-Peter Grossart Erik Cordes Jorge Cortés Jorge Cortés |
author_sort |
Keilor Rojas-Jimenez |
title |
Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific |
title_short |
Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific |
title_full |
Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific |
title_fullStr |
Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific |
title_full_unstemmed |
Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific |
title_sort |
fungal communities in sediments along a depth gradient in the eastern tropical pacific |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Microbiology |
issn |
1664-302X |
publishDate |
2020-11-01 |
description |
Deep waters represent the largest biome on Earth and the largest ecosystem of Costa Rica. Fungi play a fundamental role in global biogeochemical cycling in marine sediments, yet, they remain little explored. We studied fungal diversity and community composition in several marine sediments from 16 locations sampled along a bathymetric gradient (from a depth of 380 to 3,474 m) in two transects of about 1,500 km length in the Eastern Tropical Pacific (ETP) of Costa Rica. Sequence analysis of the V7-V8 region of the 18S rRNA gene obtained from sediment cores revealed the presence of 787 fungal amplicon sequence variants (ASVs). On average, we detected a richness of 75 fungal ASVs per sample. Ascomycota represented the most abundant phylum with Saccharomycetes constituting the dominant class. Three ASVs accounted for ca. 63% of all fungal sequences: the yeast Metschnikowia (49.4%), Rhizophydium (6.9%), and Cladosporium (6.7%). We distinguished a cluster composed mainly by yeasts, and a second cluster by filamentous fungi, but we were unable to detect a strong effect of depth and the overlying water temperature, salinity, dissolved oxygen (DO), and pH on the composition of fungal communities. We highlight the need to understand further the ecological role of fungi in deep-sea ecosystems. |
topic |
deep-sea aquatic fungi biodiversity Metschnikowia Costa Rica |
url |
https://www.frontiersin.org/articles/10.3389/fmicb.2020.575207/full |
work_keys_str_mv |
AT keilorrojasjimenez fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific AT hanspetergrossart fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific AT hanspetergrossart fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific AT erikcordes fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific AT jorgecortes fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific AT jorgecortes fungalcommunitiesinsedimentsalongadepthgradientintheeasterntropicalpacific |
_version_ |
1724456234101243904 |