Effect of grazing by a neotropical copepod, Notodiaptomus, on a natural cyanobacterial assemblage and on toxic and non-toxic cyanobacterial strains

Panosso, Renata; Carlsson, Per; Kozlowsky‐Suzuki, Betina; Azevedo, Sandra M.F.O.; Granéli, Edna

doi:10.1093/plankt/25.9.1169

Cited by 69 publications

(39 citation statements)

References 23 publications

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“…Studies conducted by Panosso et al (2003) showed that copepods of the genus Notodiaptomus can utilise small colonies and filaments of cyanobacteria for food, which would favour their dominance in eutrophic systems.…”

Section: Discussionmentioning

confidence: 99%

Zooplankton assemblages in eutrophic reservoirs of the Brazilian semi-arid

Menezes

et al. 2013

Braz. J. Biol.

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Species composition, density, and temporal dynamics of zooplankton were studied in six reservoirs in a semi-arid region in tropical northeastern Brazil (Rio Grande do Norte state). All the reservoirs are highly eutrophic, with high contents of total nitrogen (minimum of 1200 µg.L -1 ) and total phosphorus (minimum of 10 µg.L -1 ), and extremely high algal biomass was registered (surpassing 20 µg Chl a.L -1). All the reservoirs showed an enduring condition of high turbidity and phytoplankton assemblages dominated by cyanobacteria. Zooplankton also showed quantitative patterns suggestive of eutrophic conditions, expressed by high densities, mainly in Passagem das Traíras and Sabugi reservoirs. A spatial differentiation in the composition of the zooplankton community was registered. Rotifers (especially Keratella tropica, Brachionus havanensis, and Keratella americana) were the dominant forms in the zooplankton community of Itans, Passagem das Traíras, and Sabugi reservoirs, while calanoid copepods (mainly Notodiaptomus cearensis) dominated in the Armando Ribeiro, Gargalheiras, and Parelhas systems. The existence of novel relationships in zooplankton community composition in eutrophic reservoirs in this tropical semi-arid region must be considered in designating zooplankton indicators of eutrophic conditions. Keywords: reservoirs, semi-arid, zooplankton, eutrophication. Assembléias zooplanctônicas em reservatórios eutróficos do semiárido brasileiro ResumoA composição de espécies, a densidade e a dinâmica temporal do zooplâncton foram estudadas em seis reservatórios de uma região semiárida no nordeste do Brasil (Estado do Rio Grande do Norte). Todos os reservatórios estão altamente eutróficos, com altas concentrações de nitrogênio total (mínimo de 1.200 µg.L -1 ) e fósforo total (mínimo de 10 µg.L -1), e biomassa algal extremamente alta (muitas vezes, superando 20 µg.L -1 de Chl a). Todos os reservatórios apresentaram alta turbidez e assembleias fitoplanctônicas dominadas por cianobactérias. O zooplâncton também apresentou padrões quantitativos sugestivos de condições eutróficas, expressas por altas densidades, principalmente nos Reservatórios Passagem das Traíras e Sabugi. Foi registrada uma diferenciação espacial na composição da comunidade zooplanctônica. Rotíferos (especialmente Keratella tropica, Brachionus havanensis e Keratella americana) foram as formas dominantes na comunidade zooplanctônica dos Reservatórios Itans, Passagem das Traíras e Sabugi, enquanto copépodos Calanoida (principalmente Notodiaptomus cearensis) dominaram nos Reservatórios Armando Ribeiro Gonçalves, Gargalheiras e Parelhas. A existência de novas relações na composição da comunidade zooplanctônica em reservatórios eutróficos dessa região semiárida tropical deve ser considerada no estabelecimento de indicadores zooplanctônicos de condições eutróficas.Palavras-chave: reservatórios, semiárido, zooplâncton, eutrofização.

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Section: Discussionmentioning

confidence: 99%

Zooplankton assemblages in eutrophic reservoirs of the Brazilian semi-arid

Menezes

et al. 2013

Braz. J. Biol.

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“…copepods and cladocerans) grazers in controlling HABs (e.g. Epp 1996, Elser 1999, Panosso et al 2003, Mitra & Flynn 2006. Previous studies have found that the survival of mesozooplankton grazers is negatively affected by the presence of toxic cyanobacteria (namely, Microcystis spp.…”

Section: Introductionmentioning

confidence: 99%

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Boyer¹,

Rollwagen‐Bollens²,

Bollens³

2011

Aquat. Microb. Ecol.

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“…Cladoceran-based generalizations restrict our understanding of plankton dynamics in bloom-dominated systems because cyanobacteria generally coexist with smaller and/or more selectively feeding zooplankton species such as copepods (Fulton and Paerl 1987;Koski et al 2002). In warmer climates with more persistent blooms, copepods typically dominate the crustacean zooplankton year-round, and may indirectly facilitate cyanobacteria by grazing on competing phytoplankton (Bouvy et al 2001;Panosso et al 2003;Wang et al 2010). Hence, predictions about plankton interactions in bloom dominated systems will remain incomplete until the nature of copepod grazing is better understood (Rondel et al 2007).…”

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confidence: 99%

Consequences of acclimation to Microcystis on the selective feeding behavior of the calanoid copepod Eudiaptomus gracilis

Ger

Panosso

Lürling

2011

Limnology & Oceanography

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We tested the hypothesis that calanoid copepods would adapt to extended periods of Microcystis exposure by increasing selective feeding on alternative food. Copepod (Eudiaptomus gracilis) clearance rates were compared before and after a 5-d acclimation to Microcystis aeruginosa using paired food mixtures containing a microcystinproducing (MC+) or -lacking (MC2) strain and the green alga Chlamydomonas reinhardtii. Acclimation reduced the ingestion of Microcystis, increased ingestion of Chlamydomonas, and subsequently increased feeding selectivity. The effect of acclimation was more pronounced for food mixtures with MC+ Microcystis, suggesting that E. gracilis uses a strain-specific cue related to microcystin or microcystin itself to avoid harmful food. The results indicate that exposure to sublethal abundances of Microcystis may increase copepod tolerance to blooms, given sufficient alternative food. Zooplankton grazing behavior should, therefore, be viewed as flexible and adaptive to extended periods of cyanobacteria blooms.

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Effect of grazing by a neotropical copepod, Notodiaptomus, on a natural cyanobacterial assemblage and on toxic and non-toxic cyanobacterial strains

Cited by 69 publications

References 23 publications

Zooplankton assemblages in eutrophic reservoirs of the Brazilian semi-arid

Zooplankton assemblages in eutrophic reservoirs of the Brazilian semi-arid

Microzooplankton grazing before, during and after a cyanobacterial bloom in Vancouver Lake, Washington, USA

Consequences of acclimation to Microcystis on the selective feeding behavior of the calanoid copepod Eudiaptomus gracilis

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