Topical observations on centric diatoms (Bacillariophyceae, Centrales) of Lake Como (N. Italy)

Scheffler, Wolfram; Morabito, Giuseppe

doi:10.4081/jlimnol.2003.47

Cited by 42 publications

(26 citation statements)

References 17 publications

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“…Detailed morphology based on LM and SEM studies from the Austrian type material was published by SCHEFFLER et al (2003) and HOUK et al (2010). It was also found in a Spanish karstic lake and illustrated by KISS et al (2007).…”

Section: Cyclotella Delicatula Hustedt 1952 (Figs 12 D-f)mentioning

confidence: 99%

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

Kiss

Klee²,

Éctor

et al. 2012

Acta Botanica Croatica

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Centric diatoms of 107 different Hungarian running waters were investigated. Among them the largest was the River Danube, from which more than one hundred plankton samples were analysed by scanning electron microscopy (SEM). Only one sample was analysed from creeks, which were the smallest running waters analysed in this study. There were also channels with slow currents flowing out of rivers or connecting different rivers. In total, 41 centric taxa belonging to 11 genera were found during this study. The average number of taxa found in a single watercourse was 7, the maximum 40 and the minimum 1. Cyclotella meneghiniana was the most frequently encountered species (present in 60% of sites). Twelve taxa were found in more than 20% of sites, 7 taxa between 5-10% and 6 taxa only in one site.

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Section: Cyclotella Delicatula Hustedt 1952 (Figs 12 D-f)mentioning

confidence: 99%

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

Kiss

Klee²,

Éctor

et al. 2012

Acta Botanica Croatica

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“…Stephanodiscus minutulus was commonly observed in the phytoplankton of Lake Stechlin (Padisák et al, 1998(Padisák et al, , 2003. Its variable outline of areolae (often slit-like) and in many cases flat valve face surface was described in previous studies (e.g., Scheffler and Morabito, 2003;Cruces et al, 2010), whose features correspond to the morphological characteristics of Stephanodiscus rugosus described in 1979 (Sieminska and Chudybowa). Even nowadays, the differentiation between S. minutulus and S. rugosus is disputed.…”

Section: Resultsmentioning

confidence: 94%

Spatial and temporal patterns of benthic diatom flora in Lake Stechlin, Germany

Szabó¹,

Padisák²,

Selmeczy³

et al. 2017

Turk J Bot

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IntroductionThe Baltic Lake District in northeastern Germany is composed of a multitude of lakes originated during the last glacial period (~12,000 years before). Some of the lakes are pristine and considered to represent high status in terms of the European Water Framework Directive. Lake Stechlin represents a highly valuable ecosystem. It belongs to the type of stratified lowland lakes with small catchment area and high content of calcite (Mathes et al., 2002). It is one of the most extensively studied lakes in northern Germany. Regular monitoring of its main limnological variables and biota was set in the 1950s in the context of the operation of a nuclear power plant (NPP) between 1966 and 1989. Through an external circulation system, the NPP's cooling water was taken from Lake Nehmitz, the heated water was pumped into Lake Stechlin, and diverted back to Lake Nehmitz (Casper, 1985;Koschel et al., 2002).Phytoplankton of Lake Stechlin has been studied since 1959 (Casper, 1985), and water chemistry and primary production measurements using the 14 C-technique started in 1970 (Koschel, 1974). Since 1994, a sampling program has been carried out to investigate the species composition and succession of phytoplankton (Padisák et al., 1998(Padisák et al., , 2010 and the occurrence of deep chlorophyll maxima (DCM) formed by cyanobacteria (Padisák et al., 1997(Padisák et al., , 2010Selmeczy et al., 2016). In the last decade, an increasing abundance of cyanobacterial blooms indicated a change in water quality (Padisák et al., 2010;Üveges et al., 2012).Diatom research in Lake Stechlin focused mainly on planktonic Centrales taxa. The population dynamics of two phycogeographically restricted unicellular diatom species were described (Cyclotella tripartita and Stephanocostis chantaicus -Scheffler and Padisák, , 2000. In 1999, spatial and temporal changes in spring planktonic diatom populations were studied (Padisák et al., 2003). Scheffler et al. ( , 2005 investigated the relationship between Cyclotella comensis and Cyclotella pseudocomensis with morphological, ecological, and molecular methods. Contrary to extensive and detailed phytoplankton studies, attached diatoms of the lake received much less scientific interest. In 1974 and 1975 (thermal load period), biomass and primary production of periphyton in the littoral zone were determined. Thereafter, a list of diatom taxa found in the probes was compiled and published in Casper's (1985) synthesis. Scheffler and Schönfelder (2004) reported the Abstract: Phytoplankton and planktonic centric diatoms of Lake Stechlin have been extensively studied, while attached diatoms have received much less scientific interest. In the present study, the composition of benthic diatoms and their diversity metrics were determined and compared along the shoreline of the lake in spring 2013 and autumn 2014. Overall, 118 taxa classified in 52 genera were found, of which 15 species belonged to threat categories of the Red List for Central Europe. Species richness (33 ± 4), Shannon diversity (2.47 ± ...

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“…resting spores) were counted in each sample. Identification of taxa were based on: Hustedt 1927-1966, Siemińska 1964, Krammer & Lange-Bertalot 1986, 1988, 1991a, 1991b, Pankow 1990, Snoeijs 1993, Snoeijs & Vilbaste 1994, Witkowski 1994, Snoeijs & Potapova 1995, Wiktor et al 1995, Håkansson 1996, Snoeijs & Kasperoviciene 1996, Snoeijs & Balashova 1998, Witkowski et al 2000, Lange-Bertalot 2001, Witak 2002, Lange-Bertalot et al 2003, Kusber & Jahn 2003, Scheffer & Morabito 2003, Bąk 2004, Houk & Klee 2004, Ellegaard et al 2008, Genkal et al 2008and Pliński & Witkowski 2009. Habitat, salinity and nutrient concentration requirements, as well as pollution tolerance of identified species were established according to literature, in particular: Denys 1991, Snoeijs 1993, Snoeijs & Vilbaste 1994, Van Dam et al 1994, Witkowski 1994, Snoeijs & Potapova 1995, Wiktor et al 1995, Snoeijs & Kasperoviciene 1996, Snoeijs & Balashova 1998…”

Section: Methodsmentioning

confidence: 99%

Diatoms as indicators of eutrophication in the SW part of the Gulf of Gdańsk, the Baltic Sea

Leśniewska

Witak

2011

Oceanological and Hydrobiological Studies

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The aim of this study was to reconstruct paleoenvironmental changes of the SW part of the Gulf of Gdańsk. Three subbottom sedimentary cores were analyzed with respect to diatom flora. Post-Littorina Sea assemblages were noticed in the lower parts of the cores, whilst the present-day eutrophication of the gulf was evidenced in their superficial sediments, with high abundance of so-called 'anthropogenic assemblage' taxa. Shifts in the species composition might have been caused by intensified nutrient load, increasing organic matter concentrations and possible silica limitation.

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Topical observations on centric diatoms (Bacillariophyceae, Centrales) of Lake Como (N. Italy)

Cited by 42 publications

References 17 publications

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

Centric diatoms of large rivers and tributaries in Hungary: morphology and biogeographic distribution

Spatial and temporal patterns of benthic diatom flora in Lake Stechlin, Germany

Diatoms as indicators of eutrophication in the SW part of the Gulf of Gdańsk, the Baltic Sea

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