Data_Sheet_1_Contrasting Community Composition of Active Microbial Eukaryotes in Melt Ponds and Sea Water of the Arctic Ocean Revealed by High Throughput Sequencing.docx

Melt ponds (MPs), form as the result of thawing of snow and sea ice in the summer, have lower albedo than the sea ice and are thus partly responsible for the polar amplification of global warming. Knowing the community composition of MP organisms is key to understanding their roles in the biogeochem...

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Bibliographic Details
Main Authors: Dapeng Xu, Hejun Kong, Eun-Jin Yang, Xinran Li, Nianzhi Jiao, Alan Warren, Ying Wang, Youngju Lee, Jinyoung Jung, Sung-Ho Kang
Format: Dataset
Language:unknown
Published: 2020
Subjects:
Microbiology
Microbial Genetics
Microbial Ecology
Mycology
assembly mechanism
community structure
diversity
high throughput cDNA sequencing
protist
18S rRNA
Arctic
Arctic Ocean
albedo
Global warming
Sea ice
Online Access:https://doi.org/10.3389/fmicb.2020.01170.s001
https://figshare.com/articles/Data_Sheet_1_Contrasting_Community_Composition_of_Active_Microbial_Eukaryotes_in_Melt_Ponds_and_Sea_Water_of_the_Arctic_Ocean_Revealed_by_High_Throughput_Sequencing_docx/12415040
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Summary:Melt ponds (MPs), form as the result of thawing of snow and sea ice in the summer, have lower albedo than the sea ice and are thus partly responsible for the polar amplification of global warming. Knowing the community composition of MP organisms is key to understanding their roles in the biogeochemical cycles of nutrients and elements. However, the community composition of MP microbial eukaryotes has rarely been studied. In the present study, we assessed the microbial eukaryote biodiversity, community composition, and assembly processes in MPs and surface sea water (SW) using high throughput sequencing of 18S rRNA of size-fractionated samples. Alpha diversity estimates were lower in the MPs than SW across all size fractions. The community composition of MPs was significantly different from that of SW. The MP communities were dominated by members from Chrysophyceae, the ciliate classes Litostomatea and Spirotrichea, and the cercozoan groups Filosa-Thecofilosea. One open MP community was similar to SW communities, which was probably due to the advanced stage of development of the MP enabling the exchange of species between it and adjacent SW. High portions of shared species between MPs and SW may indicate the vigorous exchange of species between these two major types of environments in the Arctic Ocean. SW microbial eukaryote communities are mainly controlled by dispersal limitation whereas those of MP are mainly controlled by ecological drift.

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