&lt;span lang="EN-US"&gt;Late Quaternary Chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania)&lt;/span&gt;

Soróczki-Pintér, Éva; Pla‐Rabès, Sergi; Magyari, Enikő K.; Stenger‐Kovács, Csilla; Buczkó, Krisztina

doi:10.11646/phytotaxa.170.3.3

Cited by 10 publications

(3 citation statements)

References 47 publications

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“…Chrysophyte stomatocysts of the Retezat Mts were studied by Soróczki-Pintér et al (2012. As a fi rst result we reported 83 stomatocyst forms from Lake Gales, from which seven proved to be new for science (Soróczki-Pintér et al 2014).…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%

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

Buczkó¹

2016

Studia bot. hung.

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“…Catalan et al, 2009;Heiri et al, 2014) started. Within the multiproxy paleoecological project PROLONG (Magyari et al, 2009a) several biotic and abiotic proxies have been studied on sediment cores of four mountain lakes including sediment organic matter (as loss on ignition) and biogenic silica content, geochemical element concentrations, diatoms, chrysophycean cysts, cladocera, ostracods and chironomids (Korponai et al, 2011;Braun et al, 2012;Buczkó et al, 2012;Iepure et al, 2012;Tóth et al, 2012;Buczkó et al, 2013;Soróczki-Pintér et al, 2014;Tóth et al, 2015). In this study we concentrate on proxy records from two lakes on the northern slopes of the Retezat Mountains.…”

Section: Introductionmentioning

confidence: 99%

Limnological changes in South Carpathian glacier-formed lakes (Retezat Mountains, Romania) during the Late Glacial and the Holocene: A synthesis

Tóth

Buczkó

Specziár

et al. 2018

Quaternary International

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Remains of aquatic biota preserved in mountain lake sediments provide an excellent tool to study lake ecosystem responses to past climate change. In the PROLONG project a multiproxy study was performed on sediments of glacier-formed lakes from the Retezat Mountains, Southern Carpathians (Romania). The studied lakes (Lake Brazi and Gales) are situated on the northern slope of the mountain at different altitudes (1740 m and 1990 m a.s.l.). Our main objectives were 1) to describe the main limnological changes in these lakes during the last ca.15,000 years and 2) to summarize the environmental history of the studied lakes based on taxonomical and functional patterns of the biological proxies. For this synthesis we used the results of diatom and chironomid analyses, and indirect biotic and abiotic parameters, including sediment organic matter (LOI) content, geochemical element concentrations (Al, Ca, S, Sr) and biogenic silica content. Using multivariate numerical approaches we analysed changes in the assemblage structure of siliceous algae and chironomids, compared temporal patterns among proxies, examined the relationship between potential driving factors, chironomid and diatom assemblage changes and identified paleolimnological phases of the lake successions. Changes in assemblage composition and aquatic ecosystem state apparently followed summer insolation, local climatic conditions and local productivity changes driven by these. Diatom and chironomid assemblages generally changed in a similar direction and at a similar time within a lake, but differed to some extent between Lake Brazi and Gales. At both lakes the strongest variations were observed in the Late Glacial and the first half of the Holocene. The strongest Holocene assemblage changes took place in the earliest Holocene in Lake Brazi, but extened into the mid-Holocene in Lake Gales, following long-term insolation changes and climatic changes. In addition, three common zone boundaries were identified: at ca. 14,200 and at ca. 6500 cal yr BP for every records and at ca. 3100 cal yr BP for diatom records in both of the lakes and for the chironomid record of Lake Brazi. This multi-proxy synthesis provides comprehensive data that increase our understanding of the past variability of lake ecosystem functioning and biodiversity in East-Central Europe.

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“…The ratio of cysts and diatoms is expressed as a percentage, C:D% (Smol, 1985;Zeeb & Smol, 2002). A decrease in this ratio has been reported in some studies to accompany increased levels of metal contamination (Cattaneo et al, 2011;Chen et al, 2014), and it is a sensitive climate proxy (Soróczki˗Pintér et al, 2014). For the accuracy it must be mentioned that chrysophytes can be represented in a sedimentary record by not only of their cysts, but also as "disarticulated" scales, bristles and spines produced by members of the Synurales and some Chrysophyceae, but their use as biotic proxy was proved less effective than application of cysts (Duff et al, 1995).…”

Section: Environmental Monitoringmentioning

confidence: 85%

Contribution of silica-scaled chrysophytes to ecosystems services: a review

et al. 2022

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Silica-scaled chrysophytes are a unique group of protists representing a major component of numerous aquatic habitats where they can significantly contribute to human well-being in many ways. In the present review, altogether 14 ecosystem services provided by silica-scaled chrysophytes were identified highlighting their importance and roles in aquatic ecosystems. The most important supporting services are related to primary production, nutrient- and biogeochemical cycling, as well as sediment formation. Additionally, they are involved in the regulation of climate, maintenance of air quality, biological control and water purification processes (as regulating services). The most relevant provisioning services include their usefulness in environmental monitoring (paleolimnology, ecological status assessment and climate modelling), production of biochemicals and provision of genetic resources. Cultural services are associated with aesthetic values, inspiration source and knowledge system as well. Although silica-scaled chrysophytes are one of the least studied groups of algae, here they are shown to provide important benefits and to have many further powerful opportunities for humans, thus their detailed research in the future is emphasised as an important key for human well-being.

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<span lang="EN-US">Late Quaternary Chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania)</span>

Cited by 10 publications

References 47 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

Limnological changes in South Carpathian glacier-formed lakes (Retezat Mountains, Romania) during the Late Glacial and the Holocene: A synthesis

Contribution of silica-scaled chrysophytes to ecosystems services: a review

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