A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43903255" target="_blank" >RIV/60076658:12310/21:43903255 - isvavai.cz</a>

Alternative codes found

RIV/61988987:17310/20:A21029CP RIV/60077344:_____/21:00541984 RIV/67985904:_____/21:00541984 RIV/00216208:11310/21:10431062

Result on the web

<a href="https://zslpublications.onlinelibrary.wiley.com/doi/10.1111/jzo.12832" target="_blank" >https://zslpublications.onlinelibrary.wiley.com/doi/10.1111/jzo.12832</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jzo.12832" target="_blank" >10.1111/jzo.12832</a>

Result language

angličtina

Original language name

A hole in the nematosphere: tardigrades and rotifers dominate the cryoconite hole environment, whereas nematodes are missing

Original language description

The worldwide distribution of microinvertebrates on glaciers, the coldest biome, is poorly known. Owing to their tolerance to hostile conditions, small size and dispersal abilities, nematodes, tardigrades and rotifers are considered cosmopolitan and together inhabit various ecosystems. In this study, we investigated their global distribution in cryoconite holes - a type of freshwater reservoir forming directly in the glacial ice that creates biodiversity hotspots on glaciers. We analysed cryoconite samples (using classical microscopic observations and environmental DNA metabarcoding) from 42 glaciers located around the world (the Arctic, Subarctic, Scandinavia, the Alps, the Caucasus, Siberia, Central Asia, Africa, South America and Antarctica), as well as using literature data. Samples from Antarctic, Karakoram and the Alps were analysed using next-generation sequencing (NGS) and classical observations under microscopes, while all other samples were analysed by microscope alone. Three general outcomes were found: (1) tardigrades and rotifers represented the most common invertebrates in cryoconite holes; (2) tardigrades and rotifers often coexisted together, with one or the other dominating, but the dominant taxon varied by region or by glacier; (3) nematodes - the most abundant, hyperdiverse and widespread metazoans on Earth, including in environments surrounding and seeding glacial surfaces - were consistently absent from cryoconite holes. Despite the general similarity of environmental conditions in cryoconite holes, the distribution of tardigrades and rotifers differed among glaciers, but not in any predictable way, suggesting that their distribution mostly depended on the random dispersal, extreme changes of supraglacial zone or competition. Although nematodes have been found in supraglacial habitats, cryoconite hole environments seem not to provide the necessary conditions for their growth and reproduction. Lack of physiological adaptations to permanently low temperatures (similar to 0 degrees C) and competition for different food resources in the cryoconite hole environment may explain the absence of nematodes in cryoconite holes.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10613 - Zoology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Zoology

ISSN

0952-8369

e-ISSN

—

Volume of the periodical

313

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

19

Pages from-to

18-36

UT code for WoS article

000570880300001

EID of the result in the Scopus database

2-s2.0-85091000696