PRIMEIRO REGISTRO DA ESPÉCIE INVASORA Ceratium furcoides (LEVANDER) LANGHANS 1925 (DINOPHYCEAE) NO LAGO PARANOÁ, DISTRITO FEDERAL

Abstract

Dinoflagelados do gênero Ceratium são considerados invasores em águas doces da América do Sul. Desde os anos 2000, os registros em reservatórios têm se tornado frequentes, principalmente aqueles relacionados à C. furcoides. Este trabalho objetivou analisar a distribuição espacial e temporal (seca e chuva) de C. furcoides no Lago Paranoá, Distrito Federal, na fase inicial de sua colonização, relacionando os dados populacionais e morfológicos da espécie com variáveis limnológicas. As amostras foram coletadas a um metro de profundidade, em três pontos diferentes do Lago Paranoá (A, C e D), entre agosto de 2016 e agosto de 2017. A densidade foi mais alta durante os meses de setembro e outubro de 2016, com o valor máximo de 207 ind.mLno ponto de maior estado trófico no mês de outubro (Ponto A). Entretanto, não houve variação significativa da densidade na escala espacial nem temporal. O biovolume celular, porém, foi maior no período de seca. De modo geral, a densidade de C. furcoides esteve correlacionada positivamente com oxigênio dissolvido, pH, fósforo total e clorofila a, e negativamente com N-NH3. Já o biovolume celular correlacionou-se positivamente apenas com o N-NH3, e negativamente com temperatura, oxigênio dissolvido, pH e clorofila a. Análise de regressão linear mostrou relação negativa significativa entre a densidade e o biovolume celular. A ocorrência contínua de C. furcoides ao longo dos meses amostrados e nos três pontos estudados, mesmo em períodos de floração de cianobactérias, sinaliza seu avanço pela bacia hidrográfica do Paraná e o potencial de estabilização desta população no Lago Paranoá, reforçando a importância do seu monitoramento neste reservatório. Palavras-chaves: autoecologia; dinoflagelado; fitoplâncton; invasão biológica; variáveis limnológicas FIRST RECORD OF THE INVASIVE SPECIES Ceratium furcoides (LEVANDER) LANGHANS 1925 (DINOPHYCEAE) IN LAKE PARANOÁ, FEDERAL DISTRICT. Dinoflagellates of the genus Ceratium are considered invasive species in South American freshwaters. Since the 2000s, records in reservoirs have become frequent, mainly related to C. furcoides. This work aimed to analyze the spatial and temporal (rainy and dry seasons) distribution of C. furcoides in Lake Paranoá, Federal District, in its initial colonization phase, relating populational and morphological data with limnological variables. Samples were collected at one meter depth, at three different sites of Lake Paranoá (A, C and D), from August 2016 to August 2017. Density was higher during September and October 2016, with the maximum value of 207 ind.mL-1 at the site with greater trophic status in October (site A). However, there was no significant variation among sites or months. Cell biovolume was higher during the dry season nevertheless. In general, density of C. furcoides was positively related to dissolved oxygen, pH, total phosphorus and chlorophyll a and negatively to N-NH3.

Ceratium furcoides (Levander) Langhans: first record in Nova Avanhandava reservoir, Southeast Brazil

“…Since its first occurrence of Ceratium furcoides in 2007 on Furnas reservoir in Minas Gerais, 13 new studies have been published, whose results document the dispersion of the species to all regions of Brazil, except the Northern Region (Santos-Wisniewski 2007, Matsumura-Tundisi et al 2010, Oliveira et al 2011, Pires et al 2012, Cavalcante et al 2013, Cassol et al 2014, Jati et al 2014, Moreira et al 2015, Nishimura et al 2015, Cavalcante et al 2016, Silva et al 2018, Crossetti et al, 2019, Roriz et al 2019. In the State of São Paulo, the specie has been registered on the reservoirs: Billings (Matsumura-Tundisi et al 2010), Barra Bonita, Itupararanga and Mirinheirinho (Pires et al 2012), Billings and Guarapiranga (Nishimura et al, 2015), Jaguari e Jacareí (Hackbart et al, 2015), Ilha Solteira (Rosini et al, 2016), Lago das Garças (Crossetti et al, 2019).…”

“…Species of the genus Ceratium are considered invasive in continental aquatic environments of South America (Silva et al 2012, Pereira et al 2013, Cavalcante et al 2016, Crossetti et al 2019. The species Ceratium furcoides (Levander) Langhans demonstrates easy adaptation to different temperatures, trophies and physical and chemical conditions of the water thus presenting rapid dispersal and establishment in tropical reservoirs, including Brazilian ones, whose records of the species have been frequent (Santos-Wisniewski et al 2007, Matsumura-Tundisi et al 2010, Oliveira et al 2011, Cavalcante et al 2013, Jati et al 2014, Nishimura et al 2015, Oliveira et al 2016, Rosini et al 2016, Campanelli et al 2017, Silva et al 2018, Roriz et al 2019.…”

First report of the invasive Ceratium furcoides (dinoflagellate) in Paracambi Reservoir, Rio de Janeiro: Risks to the world's largest domestic water treatment plant

“…Reservoir. It has since attained notoriety for its proliferation throughout several waterbodies (Cavalcante et al, 2013;Matsumura-Tundisi et al, 2010;Oliveira et al, 2011;Roriz et al, 2019). The blooms of C. furcoides have caused deleterious effects on native aquatic communities, including biotic homogenization, resource consumption and oxygen depletion, contributing to severe fish-kill events (Cassol et al, 2014;Morales, 2016;Pacheco et al, 2021;Santos-Wisniewski et al, 2007).…”

“…The spatial variation in the second axis was evidenced between the sampling sites in the summer, being associated with the TDS (−0.52) and ORP (0.50) concentrations, and the Secchi depth (SD; −0.42). In regard to the relationship between the abiotic and biotic variables, the presence of C. furcoides was generally related to higher dissolved oxygen concentrations (7.40), a higher pH (mean of 7.48) (Mac Donagh et al, 2005;Roriz et al, 2019), and lower water temperature (23°C), corroborating results from experimental data and niche modeling outputs (Butterwick et al, 2005;Macêdo, Franco, Corrêa, Costa, et al, 2021;Meichtry-de-Zaburlín et al, 2016). Cyanobacteria densities were much higher in the summer, when C. furcoides were absent.…”

“…Specifically, Ceratium furcoides (Levander) Langhans 1925, a freshwater dinoflagellate first described for northern Europe, was first reported in Brazil by Santos‐Wisniewski et al (2007) in Furnas Reservoir. It has since attained notoriety for its proliferation throughout several waterbodies (Cavalcante et al, 2013; Matsumura‐Tundisi et al, 2010; Oliveira et al, 2011; Roriz et al, 2019). The blooms of C .…”