Periphytic diatoms show a longitudinal gradient in a large subtropical shallow lake

Faria, Denise Matias de; Cardoso, Luciana de Souza; Marques, David da Motta

doi:10.5268/iw-5.2.665

Cited by 6 publications

(6 citation statements)

References 35 publications

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“…Previous work has suggested that these cellular motility responses are speciesspecific, with individual diatom species having characteristic sensitivities to the light wavelength and irradiance level (Underwood et al 2005, Serôdio et al 2006, Cohn et al 2015, and specific types of mucilage secretions used for adhesion (Hoagland et al 1993). The degree of diatom integration and insertion into complex biofilms and algal assemblages during their development is thought to directly affect the resulting diatom cell loss during water disturbances (de Faria et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Analysis of light quality and assemblage composition on diatom motility and accumulation rate

et al. 2016

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2016): Analysis of light quality and assemblage composition on diatom motility and accumulation rate, Diatom Research,The photosensitive nature of pennate diatom movement has long been observed, with cells being able to change the direction of their movement depending on the light conditions detected at the tips of the cells. However, much of this evidence is based on observations of cells in isolated, single-species culture, thus devoid of any information regarding inter-species interactions that might occur in more complex assemblages. In this study, we tested light-sensitive diatom motility responses (cell accumulation into light spots and high irradiation-induced direction change) in the absence and presence of other species. In the light spot accumulation assay, each species showed characteristic accumulation rates with regard to light irradiance, wavelength, and presence of other species. In mixed-species assemblages, the relative abundance of different species present in the light spot could be directly modified by changes in ambient light conditions. Diatom cells were also irradiated at their leading or trailing ends in the presence or absence of other diatom species to determine the effect of assemblage composition on high irradiance photo-responsiveness. While most multi-species combinations resulted in no significant change in the high irradiance response, Stauroneis phoenicenteron cells showed a significantly slower blue light stimulated direction change response, dependent on relative cell abundance in the presence of Craticula cuspidata. Our experiments thus indicate that the rate of irradiation-stimulated direction change and accumulation ability are not only species-specific and dependent on light wavelength and intensity, but can also be modulated by the presence of other diatom species.

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Section: Introductionmentioning

confidence: 99%

Analysis of light quality and assemblage composition on diatom motility and accumulation rate

et al. 2016

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“…Negative correlation between algae abundance and suspended matter was also observed by Ács and Kiss (1993) in the Danube River. Motile diatoms may become abundant in an environment with high concentrations of nutrients and TS (Faria et al 2015). Notwithstanding the well-established literature around diatom guilds and growth forms, locating species tolerance information was difficult.…”

Section: Discussionmentioning

confidence: 99%

“…The low-profile guild consists of short stature diatoms, slow-moving species, and solitary centrics (Passy 2007). The disturbance event favored pioneer growth forms and ruderal species (Peterson 1996) that are tightly attached to the substrate (Peterson and Stevenson 1992) and resistant after disturbances (Stevenson 1997, Schneck andMelo 2012) such as physical stress persisting in the periphytic matrix (Rimet and Bouchez 2012, Faria et al 2015, Riato et al 2017. A. minutissimum is largely recorded in lotic and lentic eutrophic environments (lobo et al 2004b, Ács et al 2005), even in hypereutrophic conditions (Faria et al 2013), and could be considered tolerant to strong nutrient inputs.…”

Section: Discussionmentioning

confidence: 99%

“…Diatoms were identified according to specific literature, for example, Patrick and Reimer (1966), lange-Bertalot (1986, 1991a, b), Krammer (1997a, b), lange-Bertalot (1998, 2007), Metzeltin et al (2005), Hofmann et al (2013), levkov et al (2013,2016), and herein we provide the list of diatom taxa of the Negro River and the accompanying metrics. Diatoms were classified into three guilds: motile, high-profile, and lowprofile (adapted from Passy 2007 andBerthon et al 2011) and into six growth forms: motile, erect, colonial, tube-forming, pioneer, and planktonic (adapted from Rimet and Bouchez 2011, Berthon et al 2011and Faria et al 2015.…”

Section: Study Areamentioning

confidence: 99%

“…Diatom ecological guilds are strongly related to environmental gradients and respond to disturbance effects and resource availability (Passy 2007, Lange et al 2011, Berthon et al 2011, DeNicola and Kelly 2014. Studies have shown that biological traits can be successfully used for the assessment of ecological conditions in rivers (Passy 2007, lange et al 2011, Schneck and Mello 2012, Stenger-Kovács et al 2013, lakes (Faria et al 2015), and wetlands (Riato et al 2017) at different levels of stress or disturbance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Temporal changes in biological traits of diatom communities in response to an oil spill in a subtropical river

Faria

Costin

Tremarin

et al. 2019

An. Acad. Bras. Ciênc.

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Diatom growth strategies, which are used as a proxy to analyze disturbances and environmental impacts, can also provide reliable information about environmental gradients. In this study, we used diatom communities and biological traits to assess the structure of epilithic diatoms after an oil spill in a large tributary of the Iguaçu River (Paraná, Brazil). epilithon and water samples were taken on July 12th, 2004, and after an unexpected oil spill, on the following days: 09/19, 10/03, and 10/13/2004. We observed that the spill caused a distinct shift in both diatom composition and guild group. Diversity decreased and pollution-tolerant diatoms of the motile group became dominant in response to the elevated nutrient levels and reduced light. Tube-forming diatoms, which are strong competitors for light, dominated the epilithon 24 days after the oil spill. Both diatom guilds and growth forms were successfully used to predict the environmental conditions. While diatom guilds responded to disturbances along a temporal gradient, changes inside the guilds were the main factor for understanding the environmental gradient.

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Epiphyton dynamics during an induced succession in a large shallow lake: wind disturbance and zooplankton grazing act as main structuring forces

2016

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Periphytic diatoms show a longitudinal gradient in a large subtropical shallow lake

Cited by 6 publications

References 35 publications

Analysis of light quality and assemblage composition on diatom motility and accumulation rate

Analysis of light quality and assemblage composition on diatom motility and accumulation rate

Temporal changes in biological traits of diatom communities in response to an oil spill in a subtropical river

Epiphyton dynamics during an induced succession in a large shallow lake: wind disturbance and zooplankton grazing act as main structuring forces

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