Influence of underwater light climate on periphyton and phytoplankton communities in shallow lakes from the Pampa plain (Argentina) with contrasting steady states

Sánchez, María Laura; Pérez, Gonzalo L.; Izaguirre, Irina; Pizarro, Haydée

doi:10.4081/jlimnol.2013.e6

Cited by 20 publications

(14 citation statements)

References 45 publications

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“…Therefore, earthen fish ponds can provide a more suitable environment for the development of a benthic community which, in turn, has been found to increase the fish yield, particularly in fish polycultures (Azim et al 2002). The concentration of Chl a in the phytobenthos was considerably higher than that reported for natural shallow lakes in the Pampa plains (Sánchez et al 2013) though it was comparable to values measured in fertilized experimental fish ponds with a similar number of benthic taxa (Azim et al 2002). Macrophytes and phytobenthos are usually neglected in aquaculture production unless management is oriented to promote other ecosystem services in coastal waters such as protection against tidal surges (Sequeira et al 2008).…”

Section: Discussionmentioning

confidence: 93%

“…The dominance of diatoms would be the expected outcome of both phytoplanktonic and phytobenthic assemblages in shallow inorganic-turbid lakes (Sánchez et al 2013), but the study site encompassed a wide fluctuation of the underwater light climate with clearwater, inorganic-turbid and phytoplankton-turbid phases where chlorophytes and haptophytes clearly dominated over diatoms in the phytoplankton. As demonstrated by Flöder and Burns (2005), species coexistence is promoted in light-fluctuating environments when the phytoplankton also competes for the uptake of a nutrient, such as DIP in the present study.…”

Section: Discussionmentioning

confidence: 99%

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Bloom-Forming Microalgae in High-Species Phytoplankton Assemblages Under Light-Fluctuating and Low Phosphate Conditions

Fernández-Rodríguez

Hidalgo-Lara

Jiménez‐Rodríguez

et al. 2014

Estuaries and Coasts

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Wide changes of key environmental conditions prevented competitive exclusion in the phytoplankton assemblage of a turbid shallow wetland complex artificially managed for aquaculture production (Doñana Natural Park, SW Spain), and some genera showed specific adaptations to exploit those changes. The seasonal pattern of light, temperature and conductivity was frequently overridden by irregular events of sediment resuspension. Consequently, these shallow aquaculture ponds exhibited wide fluctuations of underwater light climate with clear-water, inorganic-turbid and phytoplankton-turbid phases that accommodated a variety of primary producers, such as submerged macrophytes, a softmud bottom phytobenthos and a phytoplankton assemblage of 72 recorded taxa. The algal biomass in the benthos was about 10 times higher than that found in the plankton (as estimated by chlorophyll a concentration) though the phytoplankton bloomed (>10 6 cell ml −1 ) on 10 occasions with four microalgae: Isochrysis sp. (Haptophyta), Diacronema sp. (Haptophyta), Nannochloris sp. (Chlorophyta) and Nephroselmis pyriformis (Chlorophyta). Several environmental conditions influenced microalgae both concurrently and in anticipation (with a time lag of 8-18 days), and this influence was different for both haptophytes with regard to Nannochloris sp. which significantly thrived when the water conductivity was above 12 mS cm −1 (about 6.85 psu of salinity) and the water dissolved inorganic phosphate (DIP) concentration was >0.40 μM. In contrast, the density of Isochrysis sp. was significantly higher at a water DIP concentration <0.40 μM, while the density of Diacronema sp. was higher when the pore water DIP concentration was above 4 μg g −1 d.w., suggesting that each microalgae bloomed at different conditions of P availability.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Bloom-Forming Microalgae in High-Species Phytoplankton Assemblages Under Light-Fluctuating and Low Phosphate Conditions

Fernández-Rodríguez

Hidalgo-Lara

Jiménez‐Rodríguez

et al. 2014

Estuaries and Coasts

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“…Phytoplankton and periphyton occupy different habitats, however compete for the same resources (light, nutrients) (Havens et al, 1996). Cyanobacteria blooms, for example, can reduce light availability to the periphyton, but the algae of this community can also show adaptations to shade (e. g. changes in pigments concentrations) (Borduqui & Ferragut, 2012;Sánchez et al, 2013). On the other hand, periphyton can assimilate and retain nutrients of water column and obtain dissolved nutrients from living substrates, such as macrophytes (Vadeboncoeur & Steinman, 2002).…”

Section: Introductionmentioning

confidence: 99%

Structural changes of the phytoplankton and epiphyton in an urban hypereutrophic reservoir

Santana

Ferragut

2016

Acta Limnol. Bras.

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Aim This study evaluated the temporal changes of phytoplankton and epiphyton structure and their relationships with limnological factors in an urban hypereutrophic reservoir (Rasgão Reservoir, Brazil). Methods We collected water sample and phytoplankton in different depths at two sites (dam and near tributary input) in summer and winter 2010. Epiphyton on Salvinia spp. was sampled only at site near the tributary input. We determined limnological variables and structural attributes (species composition, density, biovolume, descriptors species, diversity) for both communities. Results Phytoplankton density and epiphyton density and biovolume were higher in the winter (dry season), which occurred the higher nutrient concentrations and lower water flow. Chlorophyceae was dominant in the phytoplankton in both period and Cyanobacteria was the second most abundant class in the winter. In the epiphyton, Bacillariophyceae was dominant in the summer and Cyanobacteria in the winter. The increase in light availability and water flow can have provided high species richness and diversity in the summer. Conclusion Temporal changes in the structure of phytoplankton and epiphyton on Salvinia were more related to increased nutrients availability (nitrogen and phosphorus) and flow variations in a hypereutrophic reservoir.

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“…In well-developed biofilm (i.e., many layers of cells), only algae cells near the biofilm-water interface may experience photoinhibition, while cells in the layers below remain protected (Sand-Jensen & Revsbech 1987;. Biofilm in freshwater ecosystems may regularly experience irradiance values that may cause photoinhibition due to daily (DeNicola et al 1992) and seasonal (Hill & Dimick 2002) variation, however, natural biofilms can produce protective accessory pigments, like carotenoids, that facilitate their adaptation to changing light environments (Laviale et al 2009;Sánchez et al 2013) and, therefore, the relationship between light and biofilm biomass is typically positive.…”

Section: Lightmentioning

confidence: 99%

Environmental factors regulate the fatty acid content of primary producers and consumers in a freshwater pond in a warming world

Parmar¹

2021

Preprint

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Examining the impact of abiotic factors on the fatty acid profile of freshwater organisms is an important step in predicting the potential effects of climate change. I designed and deployed a heating system to manipulate the water temperature of a large mesocosm (>300,000 L) within a pond to simulate future predictions. Heating was observed near the piping system but not throughout the water column. In a separate experiment, the seasonal and depth-related variance in biomass and polyunsaturated fatty acids (PUFA) content of aquatic biofilm, grown on artificial substrates (unglazed ceramic tiles) was examined. Although summer biofilm typically had higher biomass and higher PUFA yield, fall biofilm typically contained higher PUFA content (standardized for biomass). Similarly, deeper biofilm accumulated higher organic matter but contained lower standardized PUFA content. These results suggest that abiotic factors may play a key role in determining the availability of nutritionally-important fatty acids in freshwater ecosystems.

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Influence of underwater light climate on periphyton and phytoplankton communities in shallow lakes from the Pampa plain (Argentina) with contrasting steady states

Abstract: Shallow lakes from the Pampa plain (Argentina)

Cited by 20 publications

References 45 publications

Bloom-Forming Microalgae in High-Species Phytoplankton Assemblages Under Light-Fluctuating and Low Phosphate Conditions

Bloom-Forming Microalgae in High-Species Phytoplankton Assemblages Under Light-Fluctuating and Low Phosphate Conditions

Structural changes of the phytoplankton and epiphyton in an urban hypereutrophic reservoir

Environmental factors regulate the fatty acid content of primary producers and consumers in a freshwater pond in a warming world

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