Relationships between rotifers, phytoplankton and bacterioplankton in the Corumbá reservoir, Goiás State, Brazil

Bonecker, Cláudia Cósta; Aoyagui, Anderson Setsuo Miyashiro

doi:10.1007/1-4020-4408-9_43

Cited by 6 publications

(7 citation statements)

References 15 publications

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“…shown the importance of rotifers as consumers of bacteria and detritus (Bonecker & Aoyagui, 2005). This probably occurred in the Parana River environments, where this size class was more frequent.…”

Section: Discussionmentioning

confidence: 97%

High food availability linked to dominance of small zooplankton in a subtropical floodplain

Bomfim

Braghin

Bonecker

et al. 2018

Internat Rev Hydrobiol

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Zooplankton body size is fundamentally affecting productivity, ecosystem respiration, nutrient cycling, and energy transfer and may be controlled by food availability but also water physical and chemical characteristics. However, the differences in control of water physical and chemical characteristics and food availability on zooplankton body size have rarely been investigated in subtropical systems. We tested the hypotheses that: (i) the type of environment, food availability, and water physical and chemical characteristics would influence body size distribution in the Upper Paraná River floodplain and nearby subsystems and (ii) in environments with higher food availability, small‐sized organisms would predominate showing higher abundance, whereas the opposite would occur in environments with lower food availability. To test these hypotheses, we performed partial redundancy and redundancy analyses (RDA). Our results showed that food availability, Secchi depth, and suspended inorganic matter influenced the body size structure of rotifers and cladocerans. Additionally, we observed that greater food availability was related to greater abundance of organisms, which were dominated by small‐sized zooplankton (size classes C2 and C1 in rotifers, and class C2′ in cladocerans). It was possible to associate different zooplankton body size spectra with phytoplankton biovolume and planktonic ciliate abundance. We suggest that large‐bodied cladocerans could have a competitive advantage over rotifers and small‐sized cladocerans when resources are scarce, because the large‐sized group could explore a wider range of resource types.

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Section: Discussionmentioning

confidence: 97%

High food availability linked to dominance of small zooplankton in a subtropical floodplain

Bomfim

Braghin

Bonecker

et al. 2018

Internat Rev Hydrobiol

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“…Zooplankton is an important component in floodplain lakes due to its role in matter and energy transfer from primary producers to higher trophic levels (Lansac-Tôha et al, 2009) and are also involved in the microbial loop (Work and Havens, 2003;Costa Bonecker and Aoyagui, 2005). Zooplankton is constituted by numerous groups (mainly rotifers, cladocerans and copepods), which can show great diversity (José de Maia-Barbosa et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

2013

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Environmental heterogeneity is an essential quality of ecosystems as it has important implications in community structure. Macrophytes are a main component of environmental heterogeneity in floodplain lakes, and their dynamics are highly influenced by water level changes. In this context, we analysed at different spatial scales the relationship among hydrological variations, environmental heterogeneity associated to macrophytes and zooplankton regional diversity (γ diversity) in a South American floodplain lake adjacent to the Paraná River, and we also compared the local zooplankton diversity (α diversity) among the different environments that comprised the lake heterogeneity. At very low waters, the environmental heterogeneity was reduced as the lake was mainly limited to open water areas with low zooplankton diversity. At high waters, the profuse vegetation development (emergent and free‐floating), in mixed or homogeneous patches, determined a higher lake environmental heterogeneity with enhanced regional zooplankton diversity; littoral species increased over limnetic ones. Zooplankton α diversity was higher in environments with free‐floating macrophytes than in those without these plants. The structural complexity in the water column provided by plant roots would be closely related to the enhanced diversity found under free‐floating mats. This study contributes to the knowledge on the effects of strong water level variations on environmental heterogeneity, which is strongly associated to macrophytes and on zooplankton diversity, and highlights the role of free‐floating plants as diversity hosts and ‘key structures’ in floodplain lakes. Copyright © 2013 John Wiley & Sons, Ltd.

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“…In eutrophic, saline-alkaline lakes, they appear to thrive well, where, for example, they may reach population densities as high as 20,000 ind l -1 (Gulati et al, 1992;Ooms-Wilms et al, 1999;Bonecker & Aoyagui, 2005). Such population dynamics may render them useful contributor to the trophic food web in their environments.…”

Section: Discussionmentioning

confidence: 96%

“…Vareschi, 1982;Vareschi & Vareschi, 1984;Vareschi & Jacobs, 1985;Finlay et al, 1987;Gilabert, 2001;Yasindi et al 2007;Oyoo-Okoth et al, 2011;Ong'ondo et al, 2013). Generally rotifers thrive well under eutrophic conditions, for example, they may reach population densities as high as 20,000 ind l -1 (Gulati et al, 1992;Ooms-Wilms et al, 1999;Bonecker & Aoyagui, 2005). In the alkaline-lakes, rotifers attain high population densities quickly, especially when large, competitively superior zooplankton species, such as Daphnia, are rare or absent (Gilbert, 1988;Echaniz et al, 2006).…”

Section: Introductionmentioning

confidence: 95%

Elemental ratios (C:N) and stable isotopic composition of dominant rotifer species in a tropical eutrophic alkaline–saline Lake Nakuru (Kenya)

et al. 2014

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Rotifers dominate zooplankton biomass of many aquatic environments. However, their link to food web biomass has rarely been elucidated in alkaline-saline lakes. Variations in C content, C:N ratio and stable isotope composition (d 13 C, d 15 N) of dominant rotifer species were studied from January to December 2008 in alkaline-saline Lake Nakuru to provide insights into their bioenergetics. We established that Brachionus dimidiatus dominated in terms of abundance (80,000-100,000 9 10 3 ind m -3 ) and C-biomass. Also B. dimidiatus constituted about 60-75% of the rotifer biomass in the samples. All the rotifer species exhibited significant (P \ 0.05) seasonal differences in biomass, C and C:N ratios. Rotifers had lower mean d 13 C than course particulate organic matter, fine particulate organic matter and fish, but higher than mean d 13 C in the dominant phytoplankton species. In all species, d 13 C and d 15 N increased markedly during the rainy season reflecting the feeding onset on allochthonous food sources. The isotopic increase correlated with an increase in their C:N. Our results demonstrate that rotifers respond quickly to any increase in primary production and can cope with changes in its nature and timing.

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Relationships between rotifers, phytoplankton and bacterioplankton in the Corumbá reservoir, Goiás State, Brazil

Cited by 6 publications

References 15 publications

High food availability linked to dominance of small zooplankton in a subtropical floodplain

High food availability linked to dominance of small zooplankton in a subtropical floodplain

Effect of Spatial Heterogeneity on Zooplankton Diversity: A Multi-Scale Habitat Approximation in a Floodplain Lake

Elemental ratios (C:N) and stable isotopic composition of dominant rotifer species in a tropical eutrophic alkaline–saline Lake Nakuru (Kenya)

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