Freshwater diatoms from Ile de la Possession (Crozet Archipelago, sub-Antarctica): an ecological assessment

Vijver, Bart Van de; Beyens, Louis

doi:10.1007/s003000050408

Cited by 74 publications

(122 citation statements)

References 14 publications

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“…Indeed, three out of nine of their indicative species are aerophilic. It is the case of Pinnularia borealis which is quite common in soils (Ciniglia et al, 2007) and dry environments (Van de Vijver and Beyens, 1999;Sonneman, 2000). Hantzchia.…”

Section: Diatom Communities Of Shallower Lakes (B)mentioning

confidence: 99%

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Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Feret¹,

Bouchez²,

Rimet³

2017

Ann. Limnol. - Int. J. Lim.

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-Altitude lakes are weakly impacted by human activities. This makes them choice ecosystems to understand how biological communities are impacted by natural factors. This question was addressed to littoral benthic diatoms, a largely used ecological indicator. We wanted to know if benthic diatoms in lakes are more impacted by local varying factors (altitude, lake depth...) or regional varying factors (geology). The study area takes place in the Northern French Alps. Littoral benthic diatoms of 63 natural lakes situated between 1350 and 2700 m · a.s.l. were sampled. Two categories of communities were observed: one of deep and lower altitude lakes and one of higher altitude and shallower lakes. In each category, communities were characterized and were corresponding to particular lake types: lakes dominated by a particular geology, lakes with a water level fluctuation, turbid lakes,... Communities did not show a spatial structure. We observed that local factors were more important than regional factors. Indeed, the study area displayed a mixed geology even at a local level. On another hand, altitude a local varying factor determines freezing period a determining item of high-altitude lake functioning.

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Section: Diatom Communities Of Shallower Lakes (B)mentioning

confidence: 99%

“…biceps is also aerophilic (e.g. Van De Vijver and Beyens, 1999;Lowe et al, 2014). We can assume that the high abundances of aerophilic diatoms can be related to possible fluctuations of the water level drying an important area of the littoral zone, and therefore favouring such diatom species.…”

Section: Diatom Communities Of Shallower Lakes (B)mentioning

confidence: 99%

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Feret¹,

Bouchez²,

Rimet³

2017

Ann. Limnol. - Int. J. Lim.

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“…Strong winds, prevailing from the west, sweep the island (mean wind speed: 11 m s -1 Smith 1978). More information regarding climate, topography and vegetation of the island is given in Van de Vijver et al (1999).…”

Section: Study Sitementioning

confidence: 99%

“…Direct infiltration of seawater (e.g. in Jardin Japonais; Van de Vijver et al 1999) and indirect sea-spray result in elevated chloride and specific conductance values (Table II). Nutrient conditions are slightly higher in these soils due to the activity of marine birds (penguins, albatrosses and petrels) and mammals (elephant seals and fur seals).…”

Section: Valley Soilsmentioning

confidence: 99%

Soil testate amoebae from sub-Antarctic Îles Crozet

et al. 2004

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An ecological study of the soil testate amoebae (Protozoa, Rhizopoda) communities on the subAntarctic island of Île de la Possession (Îles Crozet) revealed 65 taxa, belonging to 20 genera. Trinema lineare and Euglypha laevis were the most dominant species in all types of soils on the island. A Redundancy Analysis revealed three communities that characterize specific habitats: i. fellfield soils, characterized by low moisture values and low organic material content, contained fewer taxa and fewer individuals, ii. peaty valley soils, with lower pH values, showed high abundances and diversity, and iii. soils influenced by sea spray and marine animals had higher nutrient contents, elevated chloride and conductance values, resulting in more tests of Difflugiella oviformis, Nebela dentistoma and Edaphonobiotus campascoides. Special attention was given to the species composition in relation to the soil type and its moisture content. A comparison with aquatic habitats on Île de la Possession was made.

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“…Two (C. cf. mongolica and C. nadejdae) have recently been described from Mongolia and of the remaining seven, only one (C. naviculiformis) has a cosmopolitan distribution and can be found from the Sub-Antarctic Region (Van de VijVer et al 2002) to more temperate and alpine regions in Europe, America and Asia (rumriCh et al 2000;Krammer 2003;li et al 2007). Several species show a typical boreo-alpine distribution such as C. linearis and C. anglica.…”

Section: Biogeographical and Ecological Implicationsmentioning

confidence: 99%

The genus Cymbopleura (Cymbellales, Bacillariophyta) from high altitude freshwater habitats, Everest National Park, Nepal, with the description of two new species.

Vijver¹,

Jüttner²,

Gurung³

et al. 2011

Fottea

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Abstract:As part of a study on the diatom flora of the Gokyo Valley, Everest National Park, Nepal, eleven species of Cymbopleura (Bacillariophyta), including two new species, Cymbopleura gokyoensis jüttner et Van de VijVer sp. nov. and Cymbopleura emoda jüttner et Van de VijVer sp. nov., were investigated using light and electron microscopy. Some taxa could not be identified with certainty using the currently available literature due to small differences in valve dimensions, raphe structure and striation patterns. It remains unclear whether they represent new species or whether the original descriptions should be emended to include the populations from Nepal.

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Freshwater diatoms from Ile de la Possession (Crozet Archipelago, sub-Antarctica): an ecological assessment

Cited by 74 publications

References 14 publications

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Soil testate amoebae from sub-Antarctic Îles Crozet

The genus Cymbopleura (Cymbellales, Bacillariophyta) from high altitude freshwater habitats, Everest National Park, Nepal, with the description of two new species.

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