Periphytic algal community structure in relation to seasonal variation and macrophyte richness in a shallow tropical reservoir

Souza, Mariane Lima de; Pellegrini, Barbara Golebski; Ferragut, Carla

doi:10.1007/s10750-015-2232-2

Cited by 32 publications

(31 citation statements)

References 39 publications

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“…Considering these issues and the wide use of artificial substrata in experimental studies on periphyton ecology (e.g. Borduqui & Ferragut, ; Santos, Ferragut, & Bicudo, ; Souza, Pellegrini, & Ferragut, ), we decided to use periphyton samples from colonised artificial substratum. The sampler with artificial substrata used in this study followed the model described by Branco, Peres, and Necchi Júnior () and used the artificial material (glass slides) as well as the colonisation time (30 days) described by Souza et al.…”

Section: Methodsmentioning

confidence: 99%

“…Borduqui & Ferragut, 2012;Santos, Ferragut, & Bicudo, 2013;Souza, Pellegrini, & Ferragut, 2015), we decided to use periphyton samples from colonised artificial substratum. The sampler with artificial substrata used in this study followed the model described by Branco, Peres, and Necchi J unior (2010) and used the artificial material (glass slides) as well as the colonisation time (30 days) described by Souza et al (2015). After the submersion period, the glass slides were removed from the stream bottom, placed in a container filled with stream water, and immediately transported to the laboratory.…”

Section: Speciesmentioning

confidence: 99%

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Tropical lotic primary producers: Who has the most efficient photosynthesis in low‐order stream ecosystems?

et al. 2017

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Photosynthetic performance was assessed for the main groups of primary producers of low‐order tropical streams, comprising macroalgae (11 taxa of Chlorophyta, Rhodophyta and Xanthophyta plus Cyanobacteria), bryophytes (2), angiosperms (3), and the periphytic community, by means of the Chl‐a fluorescence and oxygen evolution techniques. Samples of primary producer were collected in nine stream reaches within the same drainage basin that were characterised as open or partially shaded. Low values of compensation irradiance (Ic) were found for all species tested, suggesting that they are able to maintain an autotrophic metabolism even under very low irradiances. Parameters derived from photosynthesis–irradiance curves revealed high values of the saturation parameter (Ik), associated with relative low values of photosynthetic efficiency (αETR) and photoinhibition (βETR) for species of Chlorophyta and the periphyton, suggesting adaptation to high irradiance conditions. Species of Rhodophyta, Xanthophyta, Bryophyta and angiosperms showed, in general low values of Ik and moderate to high values of αETR and βETR, indicating typical photosynthetic responses of shade‐adapted plants. Chlorophyta and the periphyton showed high photosynthetic efficiency in high irradiance, and rhodophytes, bryophytes and angiosperms seemed to be more efficient in shaded stream stretches. Considering that Cyanobacteria showed high values of the photosynthesis/respiration (P/R) ratio, we suggest that this group is the most efficient primary producer in a wide range of low‐order tropical streams. This physiological trait could be a feature that favours the abundance of Cyanobacteria in the benthic primary producer community, as is often reported in the literature.

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Section: Methodsmentioning

confidence: 99%

Section: Speciesmentioning

confidence: 99%

Tropical lotic primary producers: Who has the most efficient photosynthesis in low‐order stream ecosystems?

et al. 2017

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“…Considering that macrophytes and phytoplankton abundance can determine clear or turbid phases in ecosystem and that both communities can influence periphytic algal abundance, the relationship between these communities plays an important role in the functioning of shallow lakes and reservoirs (Scheffer et al, 1993;Casco et al, 2009). Quantitative effects of phytoplankton and macrophyte abundance on periphyton primary production have been well examined (e.g., Liboriussen and Jeppesen, 2003;Brothers et al, 2013), but few of these studies discuss variation in relation to periphytic algal abundance and species composition (Havens et al, 1996;Souza et al, 2015). Previous studies reported that the presence of macrophytes influenced species composition of phytoplankton and periphyton in the present reservoir (Fonseca and Bicudo, 2010;Souza et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Influence of seasonality and rooted aquatic macrophyte on periphytic algal community on artificial substratum in a shallow tropical reservoir

Casartelli

Ferragut

2015

Internat. Rev. Hydrobiol.

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The interrelationships of periphyton with macrophytes and phytoplankton are quite complex and poorly investigated in tropical reservoirs. We investigated the changes in the periphytic algal community structure at equidistant sites with and without macrophyte growth in four seasons in a shallow tropical reservoir. Our main objective was to evaluate the influence of the presence and absence of macrophytes, as well as seasonality, on changes in the periphytic algal community. Glass slides were submerged for 30 days for periphyton colonization. Environmental data on physical and chemical variables, periphyton, phytoplankton chlorophyll a, and macrophyte coverage were recorded for each site. Periphyton structure was analyzed for chlorophyll a, AFDM, algal density, biovolume, species richness, and N:P molar ratio. Principal component analysis mainly ordinated sites along a gradient of temperature and nutrient concentration. Cluster analysis showed that the lowest similarity of periphytic algal species composition was between seasons. The highest periphyton biomass and algal abundance occurred in the dry season when there was reduced macrophyte coverage and phytoplankton chlorophyll a. Periphytic algal descriptor species and total density were more sensitive to the presence/absence of macrophytes than were other structural attributes. We found that the periphytic algal community structure on artificial substratum was influenced by seasonality and presence of macrophyte (Nymphaea spp.), as well as by the interaction of these factors. Our results highlight the importance of macrophyte coverage and phytoplankton chlorophyll a to the periphytic algal community structure in the littoral zone. The relationship between primary producers needs further investigation in shallow tropical reservoirs.

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“…The reduction of periphyton biomass in response to the enrichment of nutrients could be attributed to promoting the growth of phytoplankton, which creates shade cutting off sunlight. Thus, the growth of phytoplankton inhibits the growth of its competitor periphyton . The destruction and variation of periphyton habitat and the weakened competitive impacts might contribute to the bloom formation in the TGR, since the algal bloom only began to appear after the reservoir has been impounded …”

Section: Discussionmentioning

confidence: 99%

Regulating Nutrients and Phytoplankton by Extending the Habitats of Periphyton in a Deep River‐Type Reservoir

Peng

Qin

et al. 2018

CLEAN Soil Air Water

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Eutrophication and phytoplankton blooms threaten the water quality of many, reservoirs especially deep ones. Periphyton is an important component of aquatic ecosystems that can compete with phytoplankton for light and nutrients. However, studies on the dynamics of periphyton development in deep reservoirs are rare. Here, the growth characteristics of periphyton on the artificial substrate (AS) in both open water and enclosures of the Three Gorges Reservoir (TGR) are investigated. The development and relative importance of periphyton are analyzed. The results indicate that mass growth of periphyton is observed on the AS platforms after several weeks. A potential phosphorus limitation for periphyton development in the TGR is evidenced by the relatively high TN/TP ratio in the water column. The differences of phytoplankton biomass in two enclosures suggest the existence of interactions between phytoplankton and periphyton. The results indicate that the artificially loaded AS on the water surface of the deep reservoir leads to the redistribution of nutrients and light between phytoplankton and periphyton. The results are very encouraging because the use of AS for periphyton incubation is an economical and practical way to reduce the probability of phytoplankton blooms in deep reservoirs, especially when the nutrient loads cannot be reduced effectively in a short period.

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Periphytic algal community structure in relation to seasonal variation and macrophyte richness in a shallow tropical reservoir

Cited by 32 publications

References 39 publications

Tropical lotic primary producers: Who has the most efficient photosynthesis in low‐order stream ecosystems?

Tropical lotic primary producers: Who has the most efficient photosynthesis in low‐order stream ecosystems?

Influence of seasonality and rooted aquatic macrophyte on periphytic algal community on artificial substratum in a shallow tropical reservoir

Regulating Nutrients and Phytoplankton by Extending the Habitats of Periphyton in a Deep River‐Type Reservoir

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