Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean)
Background and aims - Despite the ongoing taxonomical revision of the entire (sub)-Antarctic diatom flora, our knowledge on the ecology and community associations of moss-inhabiting diatoms is still rather limited. In the present study, our research aim was to survey the diversity together with the...
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Botanic Garden Meise and Royal Botanical Society of Belgium
2021
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/32610 2023-05-15T13:46:14+02:00 Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) CHATTOVA, Barbora LEBOUVIER, Marc SYROVATKA, Vit VAN DE VIJVER, Bart 2021 https://oskar-bordeaux.fr/handle/20.500.12278/32610 https://doi.org/10.5091/plecevo.2021.1767 en eng Botanic Garden Meise and Royal Botanical Society of Belgium 2032-3913 https://oskar-bordeaux.fr/handle/20.500.12278/32610 doi:10.5091/plecevo.2021.1767 Bacillariophyta diatoms ecology mosses Ile Amsterdam southern Indian Ocean sub-Antarctic region Sciences de l'environnement/Biodiversité et Ecologie Article de revue 2021 ftoskarbordeaux https://doi.org/10.5091/plecevo.2021.1767 2021-05-11T22:29:43Z Background and aims - Despite the ongoing taxonomical revision of the entire (sub)-Antarctic diatom flora, our knowledge on the ecology and community associations of moss-inhabiting diatoms is still rather limited. In the present study, our research aim was to survey the diversity together with the environmental factors structuring the epiphytic moss diatom communities on Ile Amsterdam (TAAF), a small volcanic island in the southern Indian Ocean. Material and methods - A morphology-based dataset and (physico)chemical measurements were used for the ecological and biogeographical analysis of moss-inhabiting diatom flora from Ile Amsterdam. In total, 148 moss samples were examined using light microscopy. Key results - The analysis revealed the presence of 125 diatom taxa belonging to 38 genera. The uniqueness of the Ile Amsterdam diatom flora is mainly reflected by the species composition of the dominant genera Pinnularia, Nitzschia, Humidophila, and Luticola, with a large number of unknown and often new species. This highly specific diatom flora, together with differences in the habitats sampled and the isolated position of the island, resulted in very low similarity values between Ile Amsterdam and the other islands of the Southern Ocean. From a biogeographical point of view, 40% of the taxa have a typical cosmopolitan distribution, whereas 22% of all observed species can be considered endemic to Ile Amsterdam, with another 17% species showing a restricted sub-Antarctic distribution. The NMDS analysis, based on a cluster dendrogram, divides the samples into six main groups. For each group, indicator species were determined. Both environmental data and diatom distributions indicate that apart from elevation, specific conductance, pH, and moisture are the major factors determining the structure of moss-inhabiting diatom communities on Ile Amsterdam. Conclusion - The isolated geographic position and unique climatological and geological features of the island shaped the presence of a unique diatom flora, characterised by many endemic species. The results of the study are of prime importance for further (palaeo-)ecological and biogeographical research. Other/Unknown Material Antarc* Antarctic Southern Ocean OSKAR Bordeaux (Open Science Knowledge ARchive) Antarctic Southern Ocean Indian Plant Ecology and Evolution 154 1 63 79 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Bacillariophyta diatoms ecology mosses Ile Amsterdam southern Indian Ocean sub-Antarctic region Sciences de l'environnement/Biodiversité et Ecologie |
spellingShingle |
Bacillariophyta diatoms ecology mosses Ile Amsterdam southern Indian Ocean sub-Antarctic region Sciences de l'environnement/Biodiversité et Ecologie CHATTOVA, Barbora LEBOUVIER, Marc SYROVATKA, Vit VAN DE VIJVER, Bart Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
topic_facet |
Bacillariophyta diatoms ecology mosses Ile Amsterdam southern Indian Ocean sub-Antarctic region Sciences de l'environnement/Biodiversité et Ecologie |
description |
Background and aims - Despite the ongoing taxonomical revision of the entire (sub)-Antarctic diatom flora, our knowledge on the ecology and community associations of moss-inhabiting diatoms is still rather limited. In the present study, our research aim was to survey the diversity together with the environmental factors structuring the epiphytic moss diatom communities on Ile Amsterdam (TAAF), a small volcanic island in the southern Indian Ocean. Material and methods - A morphology-based dataset and (physico)chemical measurements were used for the ecological and biogeographical analysis of moss-inhabiting diatom flora from Ile Amsterdam. In total, 148 moss samples were examined using light microscopy. Key results - The analysis revealed the presence of 125 diatom taxa belonging to 38 genera. The uniqueness of the Ile Amsterdam diatom flora is mainly reflected by the species composition of the dominant genera Pinnularia, Nitzschia, Humidophila, and Luticola, with a large number of unknown and often new species. This highly specific diatom flora, together with differences in the habitats sampled and the isolated position of the island, resulted in very low similarity values between Ile Amsterdam and the other islands of the Southern Ocean. From a biogeographical point of view, 40% of the taxa have a typical cosmopolitan distribution, whereas 22% of all observed species can be considered endemic to Ile Amsterdam, with another 17% species showing a restricted sub-Antarctic distribution. The NMDS analysis, based on a cluster dendrogram, divides the samples into six main groups. For each group, indicator species were determined. Both environmental data and diatom distributions indicate that apart from elevation, specific conductance, pH, and moisture are the major factors determining the structure of moss-inhabiting diatom communities on Ile Amsterdam. Conclusion - The isolated geographic position and unique climatological and geological features of the island shaped the presence of a unique diatom flora, characterised by many endemic species. The results of the study are of prime importance for further (palaeo-)ecological and biogeographical research. |
format |
Other/Unknown Material |
author |
CHATTOVA, Barbora LEBOUVIER, Marc SYROVATKA, Vit VAN DE VIJVER, Bart |
author_facet |
CHATTOVA, Barbora LEBOUVIER, Marc SYROVATKA, Vit VAN DE VIJVER, Bart |
author_sort |
CHATTOVA, Barbora |
title |
Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
title_short |
Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
title_full |
Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
title_fullStr |
Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
title_full_unstemmed |
Moss-inhabiting diatom communities from Ile Amsterdam (TAAF, southern Indian Ocean) |
title_sort |
moss-inhabiting diatom communities from ile amsterdam (taaf, southern indian ocean) |
publisher |
Botanic Garden Meise and Royal Botanical Society of Belgium |
publishDate |
2021 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/32610 https://doi.org/10.5091/plecevo.2021.1767 |
geographic |
Antarctic Southern Ocean Indian |
geographic_facet |
Antarctic Southern Ocean Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
2032-3913 https://oskar-bordeaux.fr/handle/20.500.12278/32610 doi:10.5091/plecevo.2021.1767 |
op_doi |
https://doi.org/10.5091/plecevo.2021.1767 |
container_title |
Plant Ecology and Evolution |
container_volume |
154 |
container_issue |
1 |
container_start_page |
63 |
op_container_end_page |
79 |
_version_ |
1766238794782081024 |