Nuclear fine structure at interphase and during encystment in two forms of the testacean Arcella vulgaris

Raikov, Igor B.; Karadzhan, B. P.; Kaur, Raminder; Mignot, J

doi:10.1016/s0932-4739(89)80007-0

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…In that work, testate amoebae were grouped according to their dispersion ability, the preference of particular successional phases and overall long-term ecosystem dominance. However, with only a few exceptions (e.g., Chardez, 1965;Raikov et al, 1989), there is a basic lack of information on the ability of most testate amoebae to, for example, form cysts, which is an important functional trait related to ecosystems resilience and recovery rate. Nevertheless, the available studies provide a considerable amount of data that can be used to infer the functional role of individual testate amoeba taxa, which can be considered within the frameworks of functional ecology to form the basis for future studies.…”

Section: Yesmentioning

confidence: 99%

Testate Amoeba Functional Traits and Their Use in Paleoecology

et al. 2020

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This review provides a synthesis of current knowledge on the morphological and functional traits of testate amoebae, a polyphyletic group of protists commonly used as proxies of past hydrological changes in paleoecological investigations from peatland, lake sediment and soil archives. A trait-based approach to understanding testate amoebae ecology and paleoecology has gained in popularity in recent years, with research showing that morphological characteristics provide complementary information to the commonly used environmental inferences based on testate amoeba (morpho-)species data. We provide a broad overview of testate amoeba morphological and functional traits and trait-environment relationships in the context of ecology, evolution, genetics, biogeography, and paleoecology. As examples we report upon previous ecological and paleoecological studies that used trait-based approaches, and describe key testate amoebae traits that can be used to improve the interpretation of environmental studies. We also highlight knowledge gaps and speculate on potential future directions for the application of trait-based approaches in testate amoeba research.

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Section: Yesmentioning

confidence: 99%

Testate Amoeba Functional Traits and Their Use in Paleoecology

et al. 2020

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“…Its successful evolutionary history should be due to the alternation of generations, sexual reproduction alternated with asexual one. This type of life cycle is well known in some species such as Arcella vulgaris, Trinemalineare, Corythiondubium, Centropyxis orbicularis, Corythion delamarei (Raikov et al, 1989;Mignot and Raikov, 1992;Yudina and Sukhanova, 2000).…”

Section: Testate Amoebaementioning

confidence: 94%

Testateamoebae as Bio-Indicators of Contamination by Trace Elements in the Reservoir of Salto Grande Americana-Sp, Brazil

et al. 2018

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This work aims to evaluate the degree of sediment contamination and the response of Testate amoebae populations through a sediment core taken from the Salto Grande Reservoir (RSG), situated in Americana, in São Paulo State (SP), Brazil. It is based on the analysis of the trace elements geochemistry (by ICP-OES) and Testate amoebae data (by stereomicroscopic morphometric analysis). The indices of homogeneity and richness (Simpson 1-D and Margalef) were calculated. Sediment contamination was evaluated according to VGQS (TEL and PEL). The results evidenced that the sediments of Facies 3 are highly contaminated since the beginning of RSG filling. Contamination caused significant decline of Testate amoebae populations dimension and diversity. In sedimentary facies with lower concentrations of trace elements diversity and size of Testate amoebae populations are higher and are composed of different species. The results of this work indicate that Testate amoebae populations showed differentiated responses to different environmental conditions. So, these amoeboid protists can be considered good indicators of pollution caused by trace elements in fresh water aquatic environments.

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“…Essa bem sucedida história evolutiva das tecamebas, deve-se provavelmente ao fato de que algumas tecamebas possuem reprodução sexuada alternada com assexuada, como Arcella vulgaris, Trinemalineare, Corythiondubium, C. orbicularis, C. delamarei (RAIKOV et al, 1989;MIGNOT&RAIKOV, 1992;YUDINA & SUKHANOVA, 2000). Outra consideração importante é o fato de que o último ancestral comum de eucariotos já possuía reprodução sexuada (DACKS & ROGERS, 1999;SPEIJE;Ret al, 2015).…”

Section: Conceito De Espécies Em Tecamebasunclassified

Estudo multidisciplinar da evolução ambiental do Reservatório de Salto Grande, Americana, SP, a partir de análises multiproxies geoquímicos, de magnetismo ambiental e biológicos (Tecamebas)

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María²

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Nuclear fine structure at interphase and during encystment in two forms of the testacean Arcella vulgaris

Cited by 11 publications

References 14 publications

Testate Amoeba Functional Traits and Their Use in Paleoecology

Testate Amoeba Functional Traits and Their Use in Paleoecology

Testateamoebae as Bio-Indicators of Contamination by Trace Elements in the Reservoir of Salto Grande Americana-Sp, Brazil

Estudo multidisciplinar da evolução ambiental do Reservatório de Salto Grande, Americana, SP, a partir de análises multiproxies geoquímicos, de magnetismo ambiental e biológicos (Tecamebas)

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