Seasonal occurrence of silica-scaled chrysophytes under eutrophic conditions

Kristiansen, Jørgen

doi:10.1007/bf00044109

Cited by 40 publications

(16 citation statements)

References 2 publications

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“…Contrary to the classic but still persistent belief that they are mainly associated with more or less oligotrophic waters (Kristiansen, 1988;Kristiansen & Padisdk, 1992).…”

Section: Mallomonas Tonsurata Teilingmentioning

confidence: 89%

Silica-scaled chrysophytes (Synurophyceae) from some rivers and shallow lakes in Hungary

Kiss

Kristiansen

1994

Hydrobiologia

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Silica-scaled chrysophytes are a special group in the phytoplankton of rivers and shallow lakes. They are present the whole year at low density, but sometimes -mainly during autumn and spring -some species can become frequent and very numerous to form real water blooms.In this study, seven species of silica-scaled chrysophytes have been recorded and identified by electron microscopy of phytoplankton samples from some rivers and shallow lakes in Hungary. Most of these silica-scaled chrysophytes have previously been found in eutrophic and hypertrophic localities, and almost all of them are common and widely distributed, even cosmopolitan. Only Synura echinulata Korshikov has not previously been recorded from Hungary. Some of them as Synura curtispina (Petersen & Hansen) Asmund, S. petersenii Korshikov, Mallomonas acaroides Perty emend. Ivanov, M. tonsurata Teiling were frequently found in the phytoplankton samples. Sometimes in autumn and winter Synura petersenii was the most abundant species in the phytoplankton and formed blooms.

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“…Contrary to the classic but still persistent belief that they are mainly associated with more or less oligotrophic waters (Kristiansen, 1988;Kristiansen & Padisdk, 1992).…”

Section: Mallomonas Tonsurata Teilingmentioning

confidence: 89%

Silica-scaled chrysophytes (Synurophyceae) from some rivers and shallow lakes in Hungary

Kiss

Kristiansen

1994

Hydrobiologia

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“…The lorica has a long delicate stipe that is attached to the substratum (usually a filamentous alga). We suggest that the few reports of Syncrypta from North America should probably be referred to Synuropsis because the original description of the type species of Syncrypta (S. volvox Ehrenberg) was very likely Synura sphagnicola Korshikov (Kristiansen, 1988). The flagellate form may be indicative of zoospore formation.…”

Section: Pseudokephyrion Pascher Emend Schmid (Incl Kephyriopsis Pamentioning

confidence: 91%

“…The earlier notion that chrysophytes were exclusively found in oligotrophic lakes can no longer be supported (Kristiansen, 1988). The earlier notion that chrysophytes were exclusively found in oligotrophic lakes can no longer be supported (Kristiansen, 1988).…”

Section: Trophic Statusmentioning

confidence: 98%

Chrysophyceae and Phaeothamniophyceae

Nicholls¹,

Wujek

2015

Freshwater Algae of North America

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“…However, chrysophytes studies (vegetative or cysts) from sediment traps spanning a year or longer are scarce (Kamenik and Schmidt, 2005), or limited to one lake (Kristiansen, 1988;Siver and Hamer, 1992;Agbeti and Smol, 1995;Kamenik et al, 2001;Pla-Rabes and Catalan, 2011). Siver and Hamer (1992) studied a three year period of sediment trap chrysophyte assemblages in a small lake in New England in order to study their response to seasonal climate and environmental gradients.…”

Section: Introductionmentioning

confidence: 99%

Influence of inter-annual environmental variability on chrysophyte cyst assemblages: insight from a 2-years sediment trap study in lakes from northern Poland

et al. 2017

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Quantitative paleonvironmental studies using transfer functions are developed from training sets. However, changes in some variables (e.g., climatic) can be difficult to identify from short-term monitoring (e.g., less than one year). Here, we present the study of the chrysophyte cyst assemblages from sediment traps deployed during two consecutive years (November 2011-November 2013) in 14 lakes from Northern Poland. The studied lakes are distributed along a W-E climatological gradient, with very different physical, chemical and morphological characteristics, and land-uses. Field surveys were carried out to recover the sediment trap material during autumn, along with the measurement of several environmental variables (nutrients, major water ions, conductivity, pH, dissolved oxygen and chlorophyll-a). During the study, one year experienced mild seasonal changes in air temperature (November 2011-November 2012; TS1), typical of oceanic climate, while the other year was characterized by colder winter and spring (November 2012-November 2013; TS2), and higher summer temperatures, more characteristic of continental climate. Other environmental variables (e.g., nutrients) did not show great changes between both years. Multivariate statistical analyses (RDA and DCA) were performed on individual TS1 and TS2 datasets. Water chemistry and nutrients (pH, TN and TP) explained the largest portion of the variance of the chrysophyte data for the individual years. However, analyses of the combined TS1 and TS2 datasets show that strong changes between summer and autumn (warm period, ice-free period with thermal stratification) and winter and spring (cold period, ice-cover period) play the most important role in the inter-annual variability in the chrysophyte assemblages. We show how inter-annual sampling maximizes ecological gradients of interest, particularly in regions with large environmental diversity, and low climatic variability. This methodology could help to identify distinct seasonal and inter-annual changes of biological communities to improve its application in paleoclimate studies.

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Seasonal occurrence of silica-scaled chrysophytes under eutrophic conditions

Cited by 40 publications

References 2 publications

Silica-scaled chrysophytes (Synurophyceae) from some rivers and shallow lakes in Hungary

Silica-scaled chrysophytes (Synurophyceae) from some rivers and shallow lakes in Hungary

Chrysophyceae and Phaeothamniophyceae

Influence of inter-annual environmental variability on chrysophyte cyst assemblages: insight from a 2-years sediment trap study in lakes from northern Poland

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