Kateřina Kopalová | Charles University, Prague (original) (raw)

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Papers by Kateřina Kopalová

Research paper thumbnail of The past is the key to the future: Ecology and Holocene evolution of freshwater diatom communities in Esmeralda lake, Antarctica

Research paper thumbnail of Moss-inhabiting diatoms from two contrasting Maritime Antarctic islands

Plant Ecology and Evolution, 2014

Research paper thumbnail of Type analysis of the South American diatom Achnanthes haynaldii (Bacillariophyta) and description of Planothidium amphibium sp. nov., from aerial and aquatic environments in Oregon (USA)

Plant Ecology and Evolution, 2014

Research paper thumbnail of Revision of the genus Halamphora (Bacillariophyta) in the Antarctic Region

Plant Ecology and Evolution, 2014

ABSTRACT Background and aims – The limnoterrestrial and aquatic diatom flora of the entire Antarc... more ABSTRACT Background and aims – The limnoterrestrial and aquatic diatom flora of the entire Antarctic Region (sub-Antarctic islands, Maritime Antarctic Region, Antarctic Continent) is currently under revision. One of the genera that still needed a thorough analysis is the genus Halamphora, recently split off from Amphora. Halamphora species are a typical constituent of the lake diatom flora in the Antarctic region. Methods – Using both Light Microscopical (LM) and Scanning Electron Microscopical (SEM) techniques, the morphology of a large number of Halamphora taxa, present in the samples from the Antarctic Region, has been analysed. Each taxon is properly described, illustrated and compared with other morphologically similar Halamphora taxa, known worldwide. Key results – A total of seven Halamphora taxa has been found. Two taxa could be identified using the currently available literature: Halamphora veneta (Kütz.) Levkov and H. oligotraphenta (Lange-Bert.) Levkov. Five new Halamphora species are described: Halamphora ausloosiana Van de Vijver & Kopalová sp. nov., H. compereana Van de Vijver & Levkov sp. nov., H. dagmarobbelsiana Van de Vijver & Levkov sp. nov., H. lateantarctica Van de Vijver, Kopalová, Zidarova & Levkov sp. nov. and H. vyvermaniana Van de Vijver, Kopalová, Zidarova & Levkov sp. nov. Conclusions – The obtained results confirm the presence of a typical and highly specific limnoterrestrial diatom flora in the Antarctic Region and contradict the generally accepted idea about the worldwide distribution of diatoms.

Research paper thumbnail of Analysis of the type material of Achnanthidium lanceolatum Brebisson ex Kutzing (Bacillariophyta) with the description of two new Planothidium species from the Antarctic Region

Research paper thumbnail of The genus Stauroneis (Bacillariophyta) from the South Shetland Islands and James Ross Island (Antarctica)

Research paper thumbnail of Benthic diatoms (Bacillariophyta) from seepages and streams on James Ross Island (NW Weddell Sea, Antarctica)

Plant Ecology and Evolution, 2012

Research paper thumbnail of New species in the genus Muelleria (Bacillariophyta) from the Maritime Antarctic Region

Research paper thumbnail of Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region

European Journal of Taxonomy, 2014

Research paper thumbnail of TWO UNKNOWN LUTICOLA TAXA FROM THE MARITIME ANTARCTIC REGION

Research paper thumbnail of Gomphonema svalbardense sp. nov., a new freshwater diatom species (Bacillariophyta) from the Arctic Region

ABSTRACT During a survey of freshwater diatoms from lakes in the region of Petuniabukta on Spitsb... more ABSTRACT During a survey of freshwater diatoms from lakes in the region of Petuniabukta on Spitsbergen (Svalbard Archipelago) a new Gomphonema species, G. svalbardense sp. nov., has been recorded. The new taxon was previously cited in the literature as G. angustatum var. undulatum but this identification proved to be erroneous. Detailed morphology description of G. svalbardense based on light and scanning electron microscopy is presented in this paper and the morphological features of the taxon have been compared with similar species. Gomphonema svalbardense is characterized by its typical linear, almost naviculoid outline with undulating margins, with clearly inflated central part, asymmetric central area, lateral raphe with simple straight proximal endings and the weakly radiate striae. History, ecology and biogeography of the species, mainly based on literature data, have been included.

Research paper thumbnail of The genus Surirella (Bacillariophyta) in the sub-Antarctic and maritime Antarctic region

Research paper thumbnail of Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region)

Research paper thumbnail of Four new freshwater diatom species (Bacillariophyceae) from Antarctica

Research paper thumbnail of Structure and ecology of freshwater benthic diatom communities from Byers Peninsula, Livingston Island, South Shetland Islands

Research paper thumbnail of Humidophila gen. nov., a new genus for a group of diatoms (Bacillariophyta) formerly within the genus Diadesmis : species from Hawai'i, including one new species

Diatom Research, 2014

ABSTRACT While conducting surveys of freshwater algae from the Hawai'i Islands, we encoun... more ABSTRACT While conducting surveys of freshwater algae from the Hawai'i Islands, we encountered several diatom species and populations belonging to the genus Diadesmis, subgenus Paradiadesmis. Upon closer examination of valve morphology with scanning electron microscopy, the species and populations assigned to Paradiadesmis differed considerably in structure and microhabitat fidelity from Diadesmis confervacea Kützing, the type species of the genus Diadesmis. The Hawai'i species have each stria composed of a single elongate areola, external distal raphe ends that are straight to curved, and fine hymenate occlusions on the interior of the areolae. These structures are not found in D. confervacea. Therefore, we propose a new genus, Humidophila, to accommodate these taxa formerly belonging to the subgenus Paradiadesmis. One new species from the Hawai'i Islands is described and 47 former Diadesmis species are transferred to Humidophila.

Research paper thumbnail of THREE NEW TERRESTRIAL DIATOM SPECIES FROM SEEPAGE AREAS ON JAMES ROSS ISLAND (ANTARCTIC PENINSULA REGION)

Research paper thumbnail of An evaluation of selected Neidium species from the Antarctic region

Research paper thumbnail of New and Interesting Small-Celled Naviculoid Diatoms (Bacillariophyceae) from a Lava Tube Cave on Île Amsterdam (TAAF, Southern Indian Ocean)

Cryptogamie, Algologie, 2013

ABSTRACT The analysis of a sample taken in a lava tube cave on Ile Amsterdam (southern Indian Oce... more ABSTRACT The analysis of a sample taken in a lava tube cave on Ile Amsterdam (southern Indian Ocean) revealed the presence of three interesting small-celled naviculoid diatom taxa. Based on light and detailed scanning electron microscopy, two of these taxa are described as new: Mayamaea cavernicola sp. nov. and Sellaphora barae sp. nov. A third taxon, Chamaepinnularia aerophila Van de Vijver et Beyens, was previously only found in the type locality on the nearby Crozet Archipelago. The three taxa are compared to other morphologically similar species from Europe, South America and the (sub-)Antarctic Region.

Research paper thumbnail of Inland diatoms from the McMurdo Dry Valleys and James Ross Island, Antarctica

Research paper thumbnail of The past is the key to the future: Ecology and Holocene evolution of freshwater diatom communities in Esmeralda lake, Antarctica

Research paper thumbnail of Moss-inhabiting diatoms from two contrasting Maritime Antarctic islands

Plant Ecology and Evolution, 2014

Research paper thumbnail of Type analysis of the South American diatom Achnanthes haynaldii (Bacillariophyta) and description of Planothidium amphibium sp. nov., from aerial and aquatic environments in Oregon (USA)

Plant Ecology and Evolution, 2014

Research paper thumbnail of Revision of the genus Halamphora (Bacillariophyta) in the Antarctic Region

Plant Ecology and Evolution, 2014

ABSTRACT Background and aims – The limnoterrestrial and aquatic diatom flora of the entire Antarc... more ABSTRACT Background and aims – The limnoterrestrial and aquatic diatom flora of the entire Antarctic Region (sub-Antarctic islands, Maritime Antarctic Region, Antarctic Continent) is currently under revision. One of the genera that still needed a thorough analysis is the genus Halamphora, recently split off from Amphora. Halamphora species are a typical constituent of the lake diatom flora in the Antarctic region. Methods – Using both Light Microscopical (LM) and Scanning Electron Microscopical (SEM) techniques, the morphology of a large number of Halamphora taxa, present in the samples from the Antarctic Region, has been analysed. Each taxon is properly described, illustrated and compared with other morphologically similar Halamphora taxa, known worldwide. Key results – A total of seven Halamphora taxa has been found. Two taxa could be identified using the currently available literature: Halamphora veneta (Kütz.) Levkov and H. oligotraphenta (Lange-Bert.) Levkov. Five new Halamphora species are described: Halamphora ausloosiana Van de Vijver & Kopalová sp. nov., H. compereana Van de Vijver & Levkov sp. nov., H. dagmarobbelsiana Van de Vijver & Levkov sp. nov., H. lateantarctica Van de Vijver, Kopalová, Zidarova & Levkov sp. nov. and H. vyvermaniana Van de Vijver, Kopalová, Zidarova & Levkov sp. nov. Conclusions – The obtained results confirm the presence of a typical and highly specific limnoterrestrial diatom flora in the Antarctic Region and contradict the generally accepted idea about the worldwide distribution of diatoms.

Research paper thumbnail of Analysis of the type material of Achnanthidium lanceolatum Brebisson ex Kutzing (Bacillariophyta) with the description of two new Planothidium species from the Antarctic Region

Research paper thumbnail of The genus Stauroneis (Bacillariophyta) from the South Shetland Islands and James Ross Island (Antarctica)

Research paper thumbnail of Benthic diatoms (Bacillariophyta) from seepages and streams on James Ross Island (NW Weddell Sea, Antarctica)

Plant Ecology and Evolution, 2012

Research paper thumbnail of New species in the genus Muelleria (Bacillariophyta) from the Maritime Antarctic Region

Research paper thumbnail of Four Achnanthidium species (Bacillariophyta) formerly identified as Achnanthidium minutissimum from the Antarctic Region

European Journal of Taxonomy, 2014

Research paper thumbnail of TWO UNKNOWN LUTICOLA TAXA FROM THE MARITIME ANTARCTIC REGION

Research paper thumbnail of Gomphonema svalbardense sp. nov., a new freshwater diatom species (Bacillariophyta) from the Arctic Region

ABSTRACT During a survey of freshwater diatoms from lakes in the region of Petuniabukta on Spitsb... more ABSTRACT During a survey of freshwater diatoms from lakes in the region of Petuniabukta on Spitsbergen (Svalbard Archipelago) a new Gomphonema species, G. svalbardense sp. nov., has been recorded. The new taxon was previously cited in the literature as G. angustatum var. undulatum but this identification proved to be erroneous. Detailed morphology description of G. svalbardense based on light and scanning electron microscopy is presented in this paper and the morphological features of the taxon have been compared with similar species. Gomphonema svalbardense is characterized by its typical linear, almost naviculoid outline with undulating margins, with clearly inflated central part, asymmetric central area, lateral raphe with simple straight proximal endings and the weakly radiate striae. History, ecology and biogeography of the species, mainly based on literature data, have been included.

Research paper thumbnail of The genus Surirella (Bacillariophyta) in the sub-Antarctic and maritime Antarctic region

Research paper thumbnail of Description of five new species of the diatom genus Luticola (Bacillariophyta, Diadesmidaceae) found in lakes of James Ross Island (Maritime Antarctic Region)

Research paper thumbnail of Four new freshwater diatom species (Bacillariophyceae) from Antarctica

Research paper thumbnail of Structure and ecology of freshwater benthic diatom communities from Byers Peninsula, Livingston Island, South Shetland Islands

Research paper thumbnail of Humidophila gen. nov., a new genus for a group of diatoms (Bacillariophyta) formerly within the genus Diadesmis : species from Hawai'i, including one new species

Diatom Research, 2014

ABSTRACT While conducting surveys of freshwater algae from the Hawai'i Islands, we encoun... more ABSTRACT While conducting surveys of freshwater algae from the Hawai'i Islands, we encountered several diatom species and populations belonging to the genus Diadesmis, subgenus Paradiadesmis. Upon closer examination of valve morphology with scanning electron microscopy, the species and populations assigned to Paradiadesmis differed considerably in structure and microhabitat fidelity from Diadesmis confervacea Kützing, the type species of the genus Diadesmis. The Hawai'i species have each stria composed of a single elongate areola, external distal raphe ends that are straight to curved, and fine hymenate occlusions on the interior of the areolae. These structures are not found in D. confervacea. Therefore, we propose a new genus, Humidophila, to accommodate these taxa formerly belonging to the subgenus Paradiadesmis. One new species from the Hawai'i Islands is described and 47 former Diadesmis species are transferred to Humidophila.

Research paper thumbnail of THREE NEW TERRESTRIAL DIATOM SPECIES FROM SEEPAGE AREAS ON JAMES ROSS ISLAND (ANTARCTIC PENINSULA REGION)

Research paper thumbnail of An evaluation of selected Neidium species from the Antarctic region

Research paper thumbnail of New and Interesting Small-Celled Naviculoid Diatoms (Bacillariophyceae) from a Lava Tube Cave on Île Amsterdam (TAAF, Southern Indian Ocean)

Cryptogamie, Algologie, 2013

ABSTRACT The analysis of a sample taken in a lava tube cave on Ile Amsterdam (southern Indian Oce... more ABSTRACT The analysis of a sample taken in a lava tube cave on Ile Amsterdam (southern Indian Ocean) revealed the presence of three interesting small-celled naviculoid diatom taxa. Based on light and detailed scanning electron microscopy, two of these taxa are described as new: Mayamaea cavernicola sp. nov. and Sellaphora barae sp. nov. A third taxon, Chamaepinnularia aerophila Van de Vijver et Beyens, was previously only found in the type locality on the nearby Crozet Archipelago. The three taxa are compared to other morphologically similar species from Europe, South America and the (sub-)Antarctic Region.

Research paper thumbnail of Inland diatoms from the McMurdo Dry Valleys and James Ross Island, Antarctica