Are bacteria an important food source for rotifers in eutrophic lakes?

Ooms-Wilms, A. L.

doi:10.1093/plankt/19.8.1125

Cited by 48 publications

(33 citation statements)

References 36 publications

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“…Their dominance in the Lake probably arose from their wide tolerance to variable dissolved oxygen concentrations (Galkovskaya, 1995) and from their capability to feed on bacteria and detritus (Ruttner-Kolisko, 1974;Habdija et al, 1993). The most abundant species -Keratella quadrata, K. cochlearis, Polyarthra vulgaris, Filinia terminalis and Hexarthra mira -are abundant in water bodies with a wide range of physico-chemical factors and are able to use bacteria and detritus in suspension as food resources (Bogdan and Gilbert, 1982;Zankai, 1989;Habdija et al, 1993;Ooms-Wilms, 1997). Macrophyte source detritus is likely the most important food source for rotifers in the Lake, since no correlations were found between these species and chlorophyll-a concentrations.…”

Section: Discussionmentioning

confidence: 99%

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

Pereira

Soares

Ribeiro

et al. 2002

Journal of Environmental Management

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Lack of recognition of the value of wetlands has led to the loss of considerable areas of these ecosystems in the past.Linhos lake (Figueira da Foz, Portugal) is a good example of one of these ecosystems, in which human intervention was responsible for its environmental degradation and led to its precocious terrestrialization. Physico-chemical conditions and zooplankton community structure were studied in Linhos lake, in order to evaluate ecosystem functioning and to acquire baseline information. The system is characterised by high oxygen depletion. Spatial heterogeneity was confirmed by the existence of significant differences in total densities for the three zooplanktonic groups. Rotifers were the most abundant group attaining their maximum density in April (2251Ð1 ind/l). Keratella quadrata, K. cochlearis, Polyarthra vulgaris, Filinia terminalis and Hexarthra mira were the main abundant species. Correspondence analysis suggested temperature as the main controlling factor in species seasonality. In order to prevent the precocious disappearance of the lake some restoration measures were proposed based on zooplankton community structure.

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Section: Discussionmentioning

confidence: 99%

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

Pereira

Soares

Ribeiro

et al. 2002

Journal of Environmental Management

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“…Metazooplankton were further divided into three groups (one feeding on bacteria, phytoplankton, heterotrophic fl agellates and ciliates, a second consuming phytoplankton, heterotrophic fl agellates and ciliates, and a third feeding from all metazooplankton groups). The groupings were based on feeding preferences (Bogdan and Gilbert, 1982;Pace et al, 1983;Browman et al, 1989;Bern, 1990;Boon and Shiel, 1990;Gilbert and Jack, 1993;Sarma, 1993;Ooms-Wilms, 1997). Although the results for the metazooplankton groups are presented as one unit, all groups were treated separately in carbon budget calculations (Table 2).…”

Section: Data Sources and Budget Assumptions For The Pelagic Habitat mentioning

confidence: 99%

A carbon budget for an oligotrophic clearwater lake in mid-Sweden

Andersson

Kumblad

2006

Aquat. Sci.

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In this study, a whole-lake carbon budget for the oligotrophic, clearwater Lake Eckarfjärden was established both on an annual and seasonal basis. For budget calculations, the lake was divided into three habitats (pelagial, littoral and benthic) and the biota into 19 functional groups. In the lake, major parts of biomass (97 %) and primary production (91 %) are concentrated in benthic and littoral habitats and to a few functional groups. Respiration on the other hand, is focused on benthic and pelagial habitats where 60 % and 39 %, respectively, of the respiration took place. Our conceptual model indicates strong interactions between habitats. For instance, the pelagial is fed with carbon fi xed by primary producers in the benthic and littoral zones. On an annual basis, total primary production exceeds total respiration and the lake is net autotrophic. However, there are clear differences between habitats and between seasons. For instance, the littoral is net autotrophic during spring, summer and autumn, the benthic habitat is net autotrophic only during summer, and the pelagial is always net heterotrophic. Our results demonstrate clear couplings between habitats and organisms and the importance of a holistic view when studying lake ecosystems.

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“…Traditionally, bacterioplankton abundance is considered to be under the control of heterotrophic nanoflagellates [7], as this component of the microbial food web has similar growth rates to bacteria. Nevertheless, such predator-prey relationships are not always established [19,71], and abundance of bacterioplankton and heterotrophic nanoflagellates could be controlled by other grazers [19,40,72]. Heterotrophic nanoflagellates could also be asymetrically related to the bacterioplankton with preference for larger bacterial cells [11].…”

Section: Introductionmentioning

confidence: 99%

Abundance and Biomass Responses of Microbial Food Web Components to Hydrology and Environmental Gradients within a Floodplain of the River Danube

Palijan

2012

Microb Ecol

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This study investigated the relationships of time-dependent hydrological variability and selected microbial food web components. Samples were collected monthly from the Kopački Rit floodplain in Croatia, over a period of 19 months, for analysis of bacterioplankton abundance, cell size and biomass; abundance of heterotrophic nanoflagellates and nanophytoplankton; and concentration of chlorophyll a. Similar hydrological variability at different times of the year enabled partition of seasonal effects from hydrological changes on microbial community properties. The results suggested that, unlike some other studies investigating sites with different connectivity, bacterioplankton abundance, and phytoplankton abundance and biomass increased during lentic conditions. At increasing water level, nanophytoplankton showed lower sensitivity to disturbance in comparison with total phytoplankton biomass: this could prolong autotrophic conditions within the floodplain. Bacterioplankton biomass, unlike phytoplankton, was not impacted by hydrology. The bacterial biomass less affected by hydrological changes can be an important additional food component for the floodplain food web. The results also suggested a mechanism controlling bacterial cell size independent of hydrology, as bacterial cell size was significantly decreased as nanoflagellate abundance increased. Hydrology, regardless of seasonal sucession, has the potential to structure microbial food webs, supporting microbial development during lentic conditions. Conversely, other components appear unaffected by hydrology or may be more strongly controlled by biotic interactions. This research, therefore, adds to understanding on microbial food web interactions in the context of flood and flow pulses in river-floodplain ecosystems.

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Are bacteria an important food source for rotifers in eutrophic lakes?

Cited by 48 publications

References 36 publications

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

Assessing the trophic state of Linhos lake: a first step towards ecological rehabilitation

A carbon budget for an oligotrophic clearwater lake in mid-Sweden

Abundance and Biomass Responses of Microbial Food Web Components to Hydrology and Environmental Gradients within a Floodplain of the River Danube

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