Biofilm dynamics of the nuisance diatom, Didymosphenia geminata (Bacillariophyceae)

Domozych, David S.; Toso, Marc; Snyder, Amy

doi:10.1127/1438-9134/2010/0136-0249

“…Previous studies have documented the ability of D. geminata mats to generate habitat for small diatoms and other microorganisms (Domozych, Toso & Snyder, 2010; Ladrera, Gomà & Prat, 2018) by reducing the cutting effort through increased mat thickness (Larned et al, 2011; Cullis, Crimaldi & McKnight, 2013), which favors the colonization of cosmopolitan diatoms (Kilroy, Larned & Biggs, 2009) and is consistent with the pattern detected.…”

Section: Discussionsupporting

confidence: 81%

Mat thickness associated withDidymosphenia geminataandCymbellaspp. in the southern rivers of Chile

Zamorano

¹

,

Peredo-Parada²,

Lillo³

et al. 2019

PeerJ

2

1

0

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Didymosphenia geminata is a diatom that can alter aquatic systems. Several investigations have shown as chemical, and hydraulic factors have a great influence on the proliferation of D. geminata, but the study of other microalgae that could be associated with it has been poorly addressed. The objective of this study is to evaluate the relationship between mat thickness, D. geminata and another taxon that produces mucilage, Cymbella, while also considering physical and chemical factors. For this, two samples were taken, one in the spring of 2013 and the other in the autumn of 2014, from eight rivers in central-southern Chile-South America, where the benthic community was characterized, and the thickness of the mat was measured. The results show that the mat thickness on sites with the presence of both taxa is doubled, and while sites with D. geminata presence showed mat peak on autumn, sites with Cymbella spp. presence showed on spring. Also, higher values of mat thickness associated with low cell densities of D. geminata and intermediate cell densities of Cymbella spp. Finally, physicochemical variables that better explain mat thickness are phosphorus and water temperature. An alternation process of mucilage production may explain these results by these taxa strongly related to physicochemical variables. The present study contributes evidence about the relationship between mat thickness D. geminata and other microalgae contribution, and aquatic condition for this development.

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“…Eventually, the presence of two taxa that produce mucilage would doubles the mat thickness. Previous studies have documented the ability of D. geminata to generate suitable habitat for small diatoms and other microorganisms (Domozych et al, 2010;Ladrera et al, 2018) by reducing cutting effort through increased mat thickness (Cullis et al, 2013), which favors the colonization of cosmopolitan diatoms (Kilroy et al, 2009) and is consistent with the suggested process.…”

Section: Participation Of Physical and Chemical Variablessupporting

confidence: 55%

Mat thickness associated with Didymosphenia geminata and Cymbella sp. in the southern rivers of Chile

Zamorano

¹

,

Lillo²,

Parodí

³

et al. 2018

Preprint

0

View full text Add to dashboard Cite

Didymosphenia geminata is a diatom that can alter aquatic systems. According to the international literature, chemical and hydraulic factors have a greater influence on the proliferation of D. geminata, but the study of other microalgae that could be associated with it has been poorly addressed. The objective of this study is to evaluate the relationship between the structure of mat thickness D. geminata and another taxon that produces mucilage, Cymbella sp., while also considering physical and chemical factors.

show abstract

“…Previous studies have documented the ability of D. geminata mats to generate habitat for small diatoms and other microorganisms (Domozych, Toso & Snyder, 2010;Ladrera, Gomà & Prat, 2018) by reducing the cutting effort through increased mat thickness (Larned et al, 2011;Cullis, Crimaldi & McKnight, 2013), Manuscript to be reviewed which favors the colonization of cosmopolitan diatoms (Kilroy, Larned & Biggs, 2009) and is consistent with the pattern detected.…”

Section: Geminata and Cymbella Spp And Their Relationship With Matsupporting

confidence: 53%

Peer Review #4 of "Mat thickness associated with Didymosphenia geminata and Cymbella spp. in the southern rivers of Chile (v0.2)"

2019

0

View full text Add to dashboard Cite

Didymosphenia geminata is a diatom that can alter aquatic systems. Several investigations have shown as chemical, and hydraulic factors have a great influence on the proliferation of D. geminata, but the study of other microalgae that could be associated with it has been poorly addressed. The objective of this study is to evaluate the relationship between mat thickness, D. geminata and another taxon that produces mucilage, Cymbella, while also considering physical and chemical factors. For this, two samples were taken, one in the spring of 2013 and the other in the autumn of 2014, from eight rivers in central-southern Chile-South America, where the benthic community was characterized, and the thickness of the mat was measured. The results show that the mat thickness on sites with the presence of both taxa is doubled, and while sites with D. geminata presence showed mat peak on autumn, sites with Cymbella spp. presence showed on spring. Also, higher values of mat thickness associated with low cell densities of D. geminata and intermediate cell densities of Cymbella spp. Finally, physicochemical variables that better explain mat thickness are phosphorus and water temperature. An alternation process of mucilage production may explain these results by these taxa strongly related to physicochemical variables. The present study contributes evidence about the relationship between mat thickness D. geminata and other microalgae contribution, and aquatic condition for this development.

show abstract

Biofilm dynamics of the nuisance diatom, Didymosphenia geminata (Bacillariophyceae)

Cited by 8 publications

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Mat thickness associated withDidymosphenia geminataandCymbellaspp. in the southern rivers of Chile

Mat thickness associated withDidymosphenia geminataandCymbellaspp. in the southern rivers of Chile

Mat thickness associated with Didymosphenia geminata and Cymbella sp. in the southern rivers of Chile

Peer Review #4 of "Mat thickness associated with Didymosphenia geminata and Cymbella spp. in the southern rivers of Chile (v0.2)"

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