Morphological diversity of microalgae and Cyanobacteria of cryoconite holes in Northern Victoria Land, Antarctica

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10501376" target="_blank" >RIV/00216208:11310/25:10501376 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ukyp.BI2km" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ukyp.BI2km</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/jog.2025.12" target="_blank" >10.1017/jog.2025.12</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Morphological diversity of microalgae and Cyanobacteria of cryoconite holes in Northern Victoria Land, Antarctica

Popis výsledku v původním jazyce

Cryoconite holes are supraglacial depressions containing water and microbe-mineral aggregates. Their autotrophic component plays a central role in reducing the albedo of glaciers and could contribute to sustaining the cryoconite food web. However, knowledge of its diversity is still limited, especially in Antarctica. Moreover, the study of cryoconite microalgae is challenging due to the limitations of molecular approaches, such as incomplete genetic databases and the semiquantitative nature of the data. Furthermore, it is equally difficult to examine the development of microalgae in sediment by using standard counting methods for water-living organisms. By using an adaptation of the high-speed density gradient centrifugation method, we provide a comprehensive description of the phenotypic characteristics, abundance and community structure of microalgae and Cyanobacteria in different cryoconite holes located in different glaciers of Northern Victoria Land, East Antarctica. We described 36 morphotypes belonging to Cyanobacteria, green algae and diatoms, revealing that cryoconite holes encompass a remarkably high diversity of photoautotrophs. The adapted protocol enabled the application of a standard microscopic approach, which provided crucial and comparable information on morphological characteristics, biovolume and community organization from a unique environment. The study poses the basis for the taxonomy of photoautotrophs as well as their diversity and distribution in cryoconite habitats.

Název v anglickém jazyce

Morphological diversity of microalgae and Cyanobacteria of cryoconite holes in Northern Victoria Land, Antarctica

Popis výsledku anglicky

Cryoconite holes are supraglacial depressions containing water and microbe-mineral aggregates. Their autotrophic component plays a central role in reducing the albedo of glaciers and could contribute to sustaining the cryoconite food web. However, knowledge of its diversity is still limited, especially in Antarctica. Moreover, the study of cryoconite microalgae is challenging due to the limitations of molecular approaches, such as incomplete genetic databases and the semiquantitative nature of the data. Furthermore, it is equally difficult to examine the development of microalgae in sediment by using standard counting methods for water-living organisms. By using an adaptation of the high-speed density gradient centrifugation method, we provide a comprehensive description of the phenotypic characteristics, abundance and community structure of microalgae and Cyanobacteria in different cryoconite holes located in different glaciers of Northern Victoria Land, East Antarctica. We described 36 morphotypes belonging to Cyanobacteria, green algae and diatoms, revealing that cryoconite holes encompass a remarkably high diversity of photoautotrophs. The adapted protocol enabled the application of a standard microscopic approach, which provided crucial and comparable information on morphological characteristics, biovolume and community organization from a unique environment. The study poses the basis for the taxonomy of photoautotrophs as well as their diversity and distribution in cryoconite habitats.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Glaciology

ISSN

0022-1430

e-ISSN

1727-5652

Svazek periodika

71

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

22

Strana od-do

e37

Kód UT WoS článku

001473375900001

EID výsledku v databázi Scopus

2-s2.0-105003923729