Dissolved silica dynamics, transfer and retention in a temperate groundwater flow-through shallow lake of the Pampean Plain, Argentina

Borrelli, Natalia Lorena; Romanelli, Asunción; Honaine, Mariana Fernández; Farenga, Marcelo; Fabiani, Ana; Esquius, Karina Soledad; Osterrieth, Margarita Luisa

doi:10.1007/s00027-022-00909-9

Aquat Sci

2022

DOI: 10.1007/s00027-022-00909-9

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Dissolved silica dynamics, transfer and retention in a temperate groundwater flow-through shallow lake of the Pampean Plain, Argentina

Natalia Lorena Borrelli

Asunción Romanelli

Mariana Fernández Honaine

et al.

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2024

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Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations

De Rito,

Borrelli,

Natal

et al. 2024

Aust. J. Bot.

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Context Phytoliths constitute an important source of silicon in terrestrial and aquatic ecosystems. Schoenoplectus californicus (C.A.Mey.) Soják (Cyperaceae) is an important phytolith producer. Aims We investigated the spatio-temporal variation in phytolith content of S. californicus in shallow lakes of the Pampean region, considering biomass and its relation to soil silicon content and lignin content. Methods Calcination techniques were applied to quantify phytoliths. The biomass was estimated by destructive methods. Soil silicon concentration was determined through ultraviolet–visible spectrophotometry by means of the silicomolybdate method. For lignin determination, a fibre analyser and sulfuric acid were used. Key results No significant differences were observed in the spatio-temporal analysis. There were no differences in the biomass estimation and in the phytolith per m2 contribution. Regarding soil silicon content, when the concentration was low, the phytolith production was low. Lignin content remained constant between sites. No correlation was observed between phytolith and lignin content. Conclusions S. californicus is an accumulator of amorphous silica, generating a constant quantity of phytoliths over the years and between sites. The variation in some environmental conditions does not seem to be enough to be reflected in plant silica production. No relation between lignin and silica was found, perhaps due to their different roles in plant structure. Implications The inclusion of other wetlands with more contrasting conditions may reveal the environmental constraints for the amorphous silica production. This study shows the importance of this community as a silicon source, and the implications of its displacement by other communities or urban development.

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Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations

De Rito,

Borrelli,

Natal

et al. 2024

Aust. J. Bot.

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Dissolved silica dynamics, transfer and retention in a temperate groundwater flow-through shallow lake of the Pampean Plain, Argentina

Cited by 1 publication

References 69 publications

Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations

Schoenoplectus californicus (Cyperaceae) amorphous silica contribution to the silicon cycle in pampean shallow lakes: an analysis of spatio-temporal variation and silicon–lignin relations

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