Evidence for dispersal and habitat controls on pond diatom communities from the McMurdo Sound Region of Antarctica

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10330950" target="_blank" >RIV/00216208:11310/16:10330950 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s00300-016-1901-6" target="_blank" >http://dx.doi.org/10.1007/s00300-016-1901-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00300-016-1901-6" target="_blank" >10.1007/s00300-016-1901-6</a>

Result language

angličtina

Original language name

Evidence for dispersal and habitat controls on pond diatom communities from the McMurdo Sound Region of Antarctica

Original language description

Microbial life flourishes in the ponds of the McMurdo Sound Region, which includes the McMurdo Dry Valleys (MDV) and the exposed coastal areas of Ross Island, Antarctica. Diatoms live within resident microbial mats, and because of the simplified trophic structure and limited dispersal vectors, the McMurdo Sound Region is an ideal locality to investigate diatom community assembly processes. Wind is hypothesized to transport microbiota between habitats, and following the species-sorting perspective, local conditions should act as an environmental filter. However, the role of spatial scale versus habitat characteristics on diatom community structure has not been investigated. To gain insight into these processes, we sampled microbial mats from 25 ponds and used variation partitioning to assess the spatial scales at which diatoms were influenced by chemistry and physical variables. We found substantial spatial structure in diatom communities, and spatial scale explained more variability than environmental variables. No diatoms were exclusive to Ross Island, but some species were only found in the MDVs. Furthermore, diatom communities were more likely to resemble those from other nearby ponds rather than distant ones, regardless of environmental conditions. Of the environmental variables, bromide and chloride (both indicators of marine influence) were among the most important. These results suggest that geography, dispersal, and historical environmental conditions play a major role in structuring diatom communities at large spatial scales, and chemistry may be more important within regions. These results help explain the biogeography of diatoms here and elsewhere and expand our knowledge of mechanisms influencing microbial metacommunity structure.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EH - Ecology - communities

OECD FORD branch

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Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

Polar Biology

ISSN

0722-4060

e-ISSN

—

Volume of the periodical

39

Issue of the periodical within the volume

12

Country of publishing house

DE - GERMANY

Number of pages

16

Pages from-to

2441-2456

UT code for WoS article

000390068600019

EID of the result in the Scopus database

2-s2.0-84957708385