Taxonomical and distribution guide of diatoms in soda pans of Central Europe

Stenger‐Kovács, Csilla; Lengyel, Edina

doi:10.17110/studbot.2015.46.suppl.3

Cited by 32 publications

(23 citation statements)

References 15 publications

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“…In the last couple of years there has been a growing demand for the fi ner recognition of siliceous algae; therefore several richly illustrated publications have been prepared (e.g. Potapova 2014, Stenger-Kovács andLengyel 2015). Th e special importance of such kind lies in the fact that images of these diatoms are now available for comparison and future biogeographical studies.…”

Section: Discussionmentioning

confidence: 99%

Guide to diatoms in mountain lakes in the Retezat Mountains, South Carpathians, Romania

Buczkó¹

2016

Studia bot. hung.

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Abstract:Mountain lakes have special importance in the neo-and palaeolimnology. Th e diatom fl ora of mountain regions of Europe has been studied in detail, but less attention was paid to the Romanian part of the Carpathians. Siliceous algae of mountain lakes (1,740-2,122 m a.s.l.) were studied in the Retezat Mts (South Carpathians, Romania). Sediment samples were collected in the deepest points of twenty-three pristine lakes between 2011 and 2014. A total of 152 species and intraspecifi c diatom taxa were found during this study (excluding the representatives of the two most diverse diatom genera Eunotia and Pinnularia). Altogether 140 taxa were listed and nomenclaturally checked from the previously published results. 79 common species and some rarely reported taxa are illustrated by means of light-(LM) and scanning electron microscope (SEM), and 40 other are presented here only with LM images. A partial diatom checklist is presented with 217 items, 80 of them have been recently recorded for the Retezat Mountains. Th is compilation focuses on small celled (< 20 μm) diatoms. Th e main aim is to help the identifi cation to the hardly visible, lightly silicifi cied and recently described forms, instead of repeating the earlier published data. Th is guide consist of a detailed light and scanning electron microscopy documentation of the diatom fl ora, based on 752 LM and 188 SEM pictures. New Humidophila and Staurosira taxa are presented and a new combination is proposed for Achnanthes helvetica var. minor. Th e detailed, illustrated guide hopefully will be a useful manual for ecological and palaeoecological surveys in the future.

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Section: Discussionmentioning

confidence: 99%

Guide to diatoms in mountain lakes in the Retezat Mountains, South Carpathians, Romania

Buczkó¹

2016

Studia bot. hung.

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“…Permanent slides were analyzed under a light microscope (Zeiss Axiovert A1, plan‐apochromat objective with differential interference contrast) and a scanning electron microscope (Hitachi S‐2600N). A minimum of 400 valves were identified at the highest possible taxonomic resolution (Stenger‐Kovács & Lengyel, ).…”

Section: Methodsmentioning

confidence: 99%

Trait‐based diatom functional diversity as an appropriate tool for understanding the effects of environmental changes in soda pans

Stenger‐Kovács

Lengyel

Buczkó

et al. 2019

Ecology and Evolution

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Saline lakes, among the most seriously endangered ecosystems, are threatened due to climate change and human activities. One valuable feature of these environments is that they constitute areas of high biodiversity. Ecologists are, therefore, under great pressure to improve their understanding of the effects of natural and anthropogenic disturbances on the biodiversity of saline lakes. In this study, a total of 257 samples from 32 soda pans in Central Europe between 2006 and 2015 were examined. The effects of environmental variables and of geographical and limnoecological factors on functional diversity were analyzed. Furthermore, the explanatory power of the trait-based approach was assessed, and the applicability of the indices for biomonitoring purposes was determined. It was found that low habitat heterogeneity and harsh environments lead to the selection of a small number of suitable traits, and consequently, to a naturally low level of functional diversity. Anthropogenic activities enhance diversity at functional level due to the shift toward freshwater characteristics. On the regional scale, the effects of the region and status (natural, degraded, reconstructed) on diatom functional diversity were significant and more pronounced than that of the environmental and other limnoecological factors. The degree of variance found in functional diversity ascribed to environmental variables is five times greater in the case of the application of a trait-based approach, than when a taxonomic one is employed in the literature. Each of the tested functional diversity indices was sensitive to the most important environmental variables. Furthermore, these were type-specific and proved to be more complex indicators than taxonomic metrics. It is possible to suggest four functional diversity indices (FGR, FRic, FDis, and FDiv) which emphasize their independence from substrate and seasonal variations for ecological status assessment and conservation planning. K E Y W O R D Sconservation, diversity indices, ecological status, environmental constrains, saline ecosystems | 321 STENGER-KOVÁCS ET al.

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“…Standard and specific taxonomic guides (Krammer & Lange-Bertalot, 1991, 1999a, 1999b, 2000Witkowski et al, 2000;Krammer, 2000Krammer, , 2002Krammer, , 2003Lange-Bertalot, 2001; Taylor et al, 2007;Levkov, 2009;Bey & Ector, 2010;Hofmann et al, 2011;Lange-Bertalot et al, 2011;Levkov et al, 2013;Stenger-Kovács & Lengyel, 2015) were used to identify diatoms at species level.…”

Section: Sampling and Processing Of Samplesmentioning

confidence: 99%

Structuring forces and β-diversity of benthic diatom metacommunities in soda pans of the Carpathian Basin

Szabó

Lengyel

Padisák

et al. 2018

European Journal of Phycology

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Small soda lakes represent one of the most vulnerable ecosystem types due to their high hydrological sensitivity to climate change and anthropogenic interventions. Since diatoms are excellent bioindicators, determining the β-diversity and the structuring dynamics of diatom metacommunities can provide valuable information for conservation planning of soda pans. In this study, two diatom metacommunities were surveyed monthly in a one-year period from distinct regions of the Carpathian basin: the Fertő-Hanság National Park (FH) between 2013 and 2014, and the Danube-Tisza Interfluve (DT) between 2014 and 2015. We explored whether β-diversity of diatom assemblages in the two regions is enhanced by species turnover or nestedness (related to richness differences) and investigated the role of deterministic and stochastic processes in shaping β-diversity patterns. Furthermore, we evaluated the contribution of environmental variables, geographic distance and temporal variation to community structure. High β-diversity (> 90%) was revealed for both metacommunities, and was maintained primarily by species turnover. Within the metacommunity of the DT where the natural hydrological cycle of soda pans is not disturbed, diatom communities assembled mainly by the selection force of environment at spatiotemporal scale. In the soda pans located in the habitat reconstruction area of the FH, besides species-sorting, significant temporal variation in community structure appeared due to the water management and periodic water supply. Our results point to the need for a conservation management strategy which maintains the natural hydrological regime of small saline lakes, and therefore their habitat heterogeneity which is of high conservation value.

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Taxonomical and distribution guide of diatoms in soda pans of Central Europe

Cited by 32 publications

References 15 publications

Guide to diatoms in mountain lakes in the Retezat Mountains, South Carpathians, Romania

Guide to diatoms in mountain lakes in the Retezat Mountains, South Carpathians, Romania

Trait‐based diatom functional diversity as an appropriate tool for understanding the effects of environmental changes in soda pans

Structuring forces and β-diversity of benthic diatom metacommunities in soda pans of the Carpathian Basin

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