First record of a bloom of the invasive species Ceratium furcoides (Levander) Langhans 1925 in Rio Grande do Sul state, Brazil

Cassol, Ana Paula Vestena; Filho, Waterloo Pereira; Oliveira, Maria Angélica; Domingues, André Luis; Corrêa, Fernando; Buriol, Galileo Adeli

doi:10.1590/1519-6984.05413

Cited by 17 publications

(13 citation statements)

References 8 publications

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“…During this period there was also a reduction in the abundance of green algae, beginning in fall and drastically declining in the winter. Chlorophytes are common components of freshwater phytoplankton in Brazilian tropical and subtropical lakes and usually co-occur with Ceratium blooms (Cassol et al 2014;Hackbart et al 2015). In general, chlorophytes are opportunistic organisms, which grow rapidly and depend on high concentrations of nutrients and light intensity (Olrik 1994).…”

Section: Discussionmentioning

confidence: 99%

“…Since then, there has been a series of papers publishing new occurrences of this algae in many Brazilian freshwater systems (Oliveira et al 2011;Cassol et al 2014;Jati et al 2014;Moreira et al 2015;Campanelli et al 2017) and a number of studies trying to understand the invasive behavior and the environmental factors that might favor the persistence and high abundance of C. furcoides in different tropical and subtropical systems. Matsumura-Tundisi et al (2010) showed that a bloom of C. furcoides in a tropical hypereutrophic reservoir (Billings reservoir, São Paulo -Brazil) was related to mild temperatures (19-21 °C) and water column turbulence.…”

Section: Introductionmentioning

confidence: 99%

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Invasion and establishment of Ceratium furcoides (Dinophyceae) in an urban lake in Porto Alegre, RS, Brazil

et al. 2019

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Ceratium furcoides has received attention due its invasive behavior in South America and consequent alterations in local phytoplankton communities. Pedalinhos Lake had been dominated by chlorophytes until 2015, when the first occurrence of this dinoflagellate was detected. In order to investigate the colonization process of this species, we monitored the meteorological variables and phytoplankton abundance of this urban lake on a weekly basis from September 2015 to September 2018. At the beginning of the invasion process (Year 1), a peak density of 10,170 ind.mL-1 was recorded, with a significant decrease to 23 ind.mL-1 , indicating an initial, unstable process of adaptation, with notable oscillation and reduction of cyanobacterial blooms. At this time, abundance of C. furcoides revealed inverse correlations with cyanobacteria, temperature, and insolation. In Year 2 there were a stabilization of the density of C. furcoides accompanied by increased cell size. Year 3 (starting in September 2017) was again marked by oscillations in the density of this dinoflagellate. This study contributes to improved understanding of the adaptation process of this dinoflagellate in an invaded environment and its effects on the local phytoplankton community.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Invasion and establishment of Ceratium furcoides (Dinophyceae) in an urban lake in Porto Alegre, RS, Brazil

et al. 2019

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“…This system has not been studied in the context of cascade systems. In the upper Jacuí course, only Dona Francisca reservoir, to our knowledge, has been studied to date (Torgan et al, 1981;Werner & Laughinghouse IV, 2009;Schneck et al, 2011;Rodrigues et al, 2012) and Itaùba reservoir (Cassol et al, 2014).…”

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confidence: 99%

Climate factors and limnological conditions shaping phytoplankton community in two subtropical cascading reservoirs

et al. 2017

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Cite as: Cassol, A.P.V. et al. Climate factors and limnological conditions shaping phytoplankton community in two subtropical cascading reservoirs. Acta Limnologica Brasiliensia, 2017, vol. 29, e17. Abstract: Aim: A series of dams along the course of a river forms a complex cascading reservoir system. The interconnectivity of the dams is perceived with the reduction of turbidity and phosphorus and the increase of specific richness throughout the system. Designing a management system that promotes the integration of biotic and abiotic data is essential to these resources of recognized importance for the population, the country's power generation and watersheds management. The Jacuí River is an important water resource in the state of Rio Grande do Sul, along its upper course, five water reservoirs comprise a cascade system tapped for energy generation and agriculture, but the effects on the phytoplankton community of cascading dams are still unknown. Thus, the present study aimed to investigate spatial and temporal patterns of phytoplankton associated with climatological and limnological characteristics of the Ernestina and Itaúba water reservoirs, located in the upper Jacuí River, RS, Brazil. Methods: Sampling campaigns were carried out seasonally from January 2012 to February 2013, with four sampling stations within each dam and at three different depths. The sampling units were determined according to the three zones of the reservoir: river areas, transition and lake. Results: A total of 91 phytoplankton species were identified in Ernestina and 130 in Itaúba. There was no significant difference between vertical and horizontal patterns, since the community responded to seasonal changes and the specific characteristics of each dam. Conclusions: The specific richness and water transparency increased downstream of the system and changes in water retention time were important for cell density and composition.Keywords: Plankton; seasonality; ecological dynamics; retention time.Resumo: Objetivo: Uma série de represas ao longo do curso de um rio formam o complexo sistema em cascata de reservatórios. A interconectividade dessas represas são percebidas com a redução da turbidez e fósforo e aumento da riqueza de espécie ao longo do sistema. Além disso, cada reservatório possui suas características, bióticas e abióticas, que devem ser avaliadas e utilizadas como instrumento na elaboração de propostas de manejo contínuo das bacias hidrográficas. O rio Jacuí, com cinco represas inseridas ao longo do seu curso superior, é um importante recurso hídrico do estado do RS, explorado para geração de energia e agricultura, no entanto seus efeitos na comunidade fitoplanctônica das represas construídas em cascata ainda é desconhecido. Dessa forma o presente estudo teve como objetivo investigar padrões espaciais e temporais do fitoplâncton associadas às características climatológicas e 2 Cassol, A.P.V. et al.

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“…Two genera, including Ceratium and Unruhdinium , were identified with high relative abundance along the Songhua River. Some species of Ceratium , such as Ceratium hirundinella and Ceratium furcoides , can form algae blooms (Van Ginkel, Hohls & Vermaak, 2001; Cassol et al, 2014). As such algae blooms may kill fish and lead to mass economic losses, as seen in Japan (Taylor, Fukuyo & Larson, 1995), harmful algae should be closely monitored for a better understanding of their population dynamics to manage economic and ecological issues along the Songhua River.…”

Section: Discussionmentioning

confidence: 99%

Distribution patterns of dinoflagellate communities along the Songhua River

Gao

Chen

Xiong

et al. 2019

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Background Dinoflagellates have the potential to pose severe ecological and economic damages to aquatic ecosystems. It is therefore largely needed to understand the causes and consequences of distribution patterns of dinoflagellate communities in order to manage potential environmental problems. However, a majority of studies have focused on marine ecosystems, while the geographical distribution patterns of dinoflagellate communities and associated determinants in freshwater ecosystems remain unexplored, particularly in running water ecosystems such as rivers and streams. Methods Here we utilized multiple linear regression analysis and combined information on species composition recovered by high-throughput sequencing and spatial and environmental variables to analyze the distribution patterns of dinoflagellate communities along the Songhua River. Results After high-throughput sequencing, a total of 490 operational taxonomic units (OTUs) were assigned to dinoflagellates, covering seven orders, 13 families and 22 genera. Although the sample sites were grouped into three distinctive clusters with significant difference (p < 0.05) in environmental variables, OTUs-based dinoflagellate communities among the three clusters showed no significant difference (p > 0.05). Among all 24 environmental factors, two environmental variables, including NO3-N and total dissolved solids (TDS), were selected as the significantly influential factors (p < 0.05) on the distribution patterns of dinoflagellate communities based on forward selection. The redundancy analysis (RDA) model showed that only a small proportion of community variation (6.1%) could be explained by both environmental (NO3-N and TDS) and dispersal predictors (watercourse distance) along the River. Variance partitioning revealed a larger contribution of local environmental factors (5.85%) than dispersal (0.50%) to the total variation of dinoflagellate communities. Discussion Our findings indicated that in addition to the two quantifiable processes in this study (species sorting and dispersal), more unquantifiable stochastic processes such as temporal extinction and colonization events due to rainfall may be responsible for the observed geographical distribution of the dinoflagellate community along the Songhua River. Results obtained in this study suggested that deeper investigations covering different seasons are needed to understand the causes and consequences of geographical distribution patterns of dinoflagellate biodiversity in river ecosystems.

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First record of a bloom of the invasive species Ceratium furcoides (Levander) Langhans 1925 in Rio Grande do Sul state, Brazil

Cited by 17 publications

References 8 publications

Invasion and establishment of Ceratium furcoides (Dinophyceae) in an urban lake in Porto Alegre, RS, Brazil

Invasion and establishment of Ceratium furcoides (Dinophyceae) in an urban lake in Porto Alegre, RS, Brazil

Climate factors and limnological conditions shaping phytoplankton community in two subtropical cascading reservoirs

Distribution patterns of dinoflagellate communities along the Songhua River

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