Structure and dynamics of the community of periphytic algae in a subtropical reservoir (state of São Paulo, Brazil)

Taniwaki, Ricardo Hideo; Borghi, Tatiana Cintra; Magrin, Albano Geraldo Emilio; Calijuri, Maria do Carmo; Bottino, Flávia; Moschini‐Carlos, Viviane

doi:10.1590/s0102-33062013000300013

Cited by 7 publications

(4 citation statements)

References 33 publications

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“…delicatissima. Such varieties of different algae were also observed in previous studies 52,53 . This observation is also supported by seasonal patterns of δ 13 C DIC and δ 13 C POC in the data set.…”

Section: Discussionsupporting

confidence: 87%

Dominance of in situ produced particulate organic carbon in a subtropical reservoir inferred from carbon stable isotopes

Bueno

Frascareli

Gontijo

et al. 2020

Sci Rep

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Sources of particulate organic carbon (poc) play important roles in aqueous carbon cycling because internal production can provide labile material that can easily be turned into CO 2. On the other hand, more recalcitrant external POC inputs can cause increased loads to sedimentary organic matter that may ultimately cause cH 4 release. In order to differentiate sources, stable isotopes offer a useful tool. We present a study on the Itupararanga Reservoir (Brazil) where origins of POC were explored by comparing its isotope ratios (δ 13 c poc) to those of dissolved inorganic carbon (δ 13 c Dic). The δ 13 c poc averaged around − 25.1‰ in near-surface waters, which indicates higher primary production inferred from a fractionation model that takes into account carbon transfer with a combined evaluation of δ 13 c POC, δ 13 c Dic and aqueous co 2. However, δ 13 c poc values for water depths from 3 to 15 m decreased to − 35.6‰ and indicated different carbon sources. Accordingly, the δ 13 c Dic values of the reservoir averaged around + 0.6‰ in the top 3 m of the water column. This indicates CO 2 degassing and photosynthesis. Below this depth, DIC isotope values of as low as − 10.1‰ showed stronger influences of respiration. A fractionation model with both isotope parameters revealed that 24% of the POC in the reservoir originated from detritus outside the reservoir and 76% of it was produced internally by aqueous co 2 fixation. Reservoirs and their tributaries are active components of landscapes. They receive, transport, process and store inorganic and organic carbon 1. Although lakes and reservoirs cover only 2.2% of the global continental area, they may play so far poorly accounted roles in cycling continental carbon 2-4. In addition, regional investigations of carbon budgets become increasingly important for managing water resources because they define ecosystem functions and services 5-8. Spatiotemporal changes of physicochemical and biological parameters in subtropical reservoirs, can increase our knowledge of carbon turnover in water bodies. For instance, excessive precipitation, can increase terrestrial nutrients, contaminants, soil leaching and additions of untreated sewage input 9. Rainfall events can also cause near-surface turbulences in lakes that has been shown to enhance gas exchange by increasing transfer velocities of CO 2 10,11. Precipitation can also lead to increased input from external sources (i.e. allochthonous matter for instance from plant debris or soils) that may become trapped in lakes and reservoirs. This can, in turn, change biogeochemical dynamics of the water column 12. Such processes include carbon uptake and release of carbon within the water column that may also be controlled by seasonal changes of temperature, weather patterns or light availability. These may in turn have important influences on carbon fluxes inside open water bodies such as for instance sedimentation, or gross primary production, ecosystem respiration and external carbon inputs 13. For the latter, reservoir catchments ma...

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Section: Discussionsupporting

confidence: 87%

Dominance of in situ produced particulate organic carbon in a subtropical reservoir inferred from carbon stable isotopes

Bueno

Frascareli

Gontijo

et al. 2020

Sci Rep

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“…This greater macrophyte presence in the SS further supported the abundant development of periphytic communities. Similar findings were reported by Taniwaki et al (2013), emphasizing that intricate aquatic macrophyte habitats promote increased diversity and richness of periphyton.…”

Section: Discussionsupporting

confidence: 87%

Can artificially induced habitat complexity alter macroinvertebrates diversity? A case study from a freshwater wetland ecosystem

Haque,

Jewel,

Atique

et al. 2024

Environ. Res. Commun.

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Habitat complexity can enhance the resilience of wetlands against environmental stressors such as extreme weather events, pollution, and habitat loss. The introduction of artificial induced complexity (AIC) can play a significant role in reshaping the macroinvertebrate communities within wetland ecosystems by enhancing habitat quality in protected areas. Therefore, this study was designed to examine the variation of macroinvertebrates community structure in artificially induced complex sanctuary site (SS), partially protected (PP) and open sites (OS) from July 2019-April 2020. AIC in the sanctuary sites was established through the installation of cemented hexapods and ring pipes. Over the study period, a total of 665 macroinvertebrates were gathered, with 55.55% originating from SS, 31.14% from PP, and 18.21% from OS sites. The community consists mainly of Lymnaea acuminatatea and Tubifex tubifex, with the most abundant species being Limnodrillus hoffmeisteri and Branchiura sowerbyi. A notable positive impact of AIC was evident in the increased total abundance and diversity indices of macroinvertebrate communities. The Analysis of Similarity (ANOSIM) revealed significant distinctions in community structures among various intervention types, which was further corroborated by a non-metric multidimensional scaling (nMDS) plot. Similarity of Percentage Analysis (SIMPER) highlighted that Limnodrillus hoffmeisteri made the most significant contribution to the dissimilarity observed among the different intervention types. Canonical Correspondence Analysis (CCA) revealed a close association between the structure of the macroinvertebrate community and three key ecological factors: periphyton biomass, macrophyte cover, and sediment properties. These findings could offer a more effective approach for managers and policymakers engaged in the conservation of macroinvertebrates and the sustainable management of fisheries resources within wetland ecosystems. 

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“…In this study, this class had greater representation in all ecosystems and between the periods studied. The individuals of this class are usually found well represented in a wide range of environments and periods (Cavati and Fernandes 2008;Taniwaki et al, 2013). According to Murakami et al (2009), the diatom predominance is associated to its characteristic morphological and physiological of secrete mucilage which enable the attachment and adhesion to substrates.…”

Section: Discussionmentioning

confidence: 99%

Periphytic algae dynamics in lentic ecosystems in the Brazilian semiarid

et al. 2016

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The hydrological periods drive the structure and organization of aquatic communities in semiarid regions. We hypothesize that a decrease of the precipitation during the dry period will favor the development of the periphytic algal community, leading to higher richness and density in this period. To test this hypothesis, we investigated the changes in the periphytic algal community structure in three shallow and eutrophic ecosystems of the Brazilian semiarid. The sampling was performed between 2007 and 2010 at two-mensal intervals. The sampling of periphytic algal was performed in aquatic macrophytes and rocks. The abiotic variables were analyzed simultaneously. Dominance in diatoms, cyanobacteria and chlorophytes, respectively, was observed in two periods. In the dry period, waters were alkaline and had high concentrations of nitrate and total phosphorus associated with the highest densities of Bacillariophyceae. In the rainy period the water was warmer, oxygenated and high concentrations of ammonia and soluble reactive phosphorus with diatoms remained dominant but with reduced density, while cyanobacteria and chlorophytes increased. Overall, periphytic algal community composition no responded to changes in the hydrological periods. However, the hydrological periods altered the dynamics of periphytic algal community, supported by the alternation of the most representative classes (diatoms and cyanobacteria) between the hydrologic periods. Our data suggest that the morphometric and chemical and physical characteristics of lentic aquatic ecosystems studied were more important in the dynamics of periphytic algal community than the hydrological periods and types of substrates.Keywords: seasonality, reservoirs, lentic aquatic ecosystems, periphyton. Estrutura da comunidade de algas perifíticas do semiárido brasileiro ResumoOs períodos hidrológicos impulsionam a estrutura e organização das comunidades aquáticas em regiões semiáridas. Nós hipotetizamos que uma diminuição da precipitação durante o período seco irá favorecer o desenvolvimento da comunidade de algas perifíticas, levando a uma maior riqueza e densidade nesse período. Para testar esta hipótese, nós investigamos as mudanças na estrutura da comunidade de algas perifíticas em três ecossistemas rasos e eutróficos do semiárido brasileiro. As amostragens foram realizadas entre 2007 e 2010 em intervalos de bimensais. A amostragem das algas perifíticas foi realizada em macrófitas aquáticas e rochas. As variáveis abióticas foram analisadas simultaneamente. A dominância de diatomáceas, cianobactérias e clorófitas, respectivamente, foi observada em todos os períodos. No período seco, as águas foram alcalinas com altas concentrações de nitrato e fósforo total associado às maiores densidades de Bacillariophyceae. Durante o período chuvoso as águas apresentaram-se mais quentes, oxigenadas e com altas concentrações de amônia e fósforo reativo solúvel. As diatomáceas permaneceram dominantes, mas com densidade reduzida, enquanto as cianobactérias e clorofíceas aumen...

show abstract

Structure and dynamics of the community of periphytic algae in a subtropical reservoir (state of São Paulo, Brazil)

Cited by 7 publications

References 33 publications

Dominance of in situ produced particulate organic carbon in a subtropical reservoir inferred from carbon stable isotopes

Dominance of in situ produced particulate organic carbon in a subtropical reservoir inferred from carbon stable isotopes

Can artificially induced habitat complexity alter macroinvertebrates diversity? A case study from a freshwater wetland ecosystem

Periphytic algae dynamics in lentic ecosystems in the Brazilian semiarid

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