The epipelic algae of fishponds of Central and Northern Moravia (The Czech Republic).

Lysáková, Monika; Kitner, Miloslav; Poulíčková, Aloisie

doi:10.5507/fot.2007.006

Cited by 12 publications

(11 citation statements)

References 4 publications

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“…The study of epipelon was pioneered within freshwater habitats by Round (1953), but epipelic algae in general have received relatively little attention in comparison to studies of phytoplankton (Poulíčková et al, 2008a). Thus, the distribution patterns of benthic algae in fishponds remain largely unexplored (Lysáková et al, 2007;Hašler et al, 2008;Poulíčková et al, 2008a, b).…”

Section: Introductionmentioning

confidence: 97%

Distribution of epipelic diatoms in artificial fishponds along environmental and spatial gradients

et al. 2008

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Although epipelic diatoms play a key role in primary production of many ecosystems, many aspects of their biodiversity, ecology and geographical distribution are poorly understood. The present study is based on sampling of 45 man-made fishponds in the Czech Republic covering an environmental gradient from oligo/dystrophic highland ponds within protected areas to the eutrophic/hypertrophic lowland ponds used for intensive fish production. Diatom distribution patterns assessed using biomass and species composition variables were assessed along environmental and geographical gradients. In total, 185 epipelic diatom taxa were found in the investigated samples. The differences in species composition between sites were correlated with environmental parameters, but not with the geographic distance of the localities. This pattern might suggest that niche-based control, rather than the effect of dispersal limitation, is the main driving force in the species composition of epipelic diatoms in fishponds. The alpha-diversity of sites correlated with altitude, nitrogen and chlorophyll a concentrations but did not correlate with the area of the ponds. The significant relationships between local abundance of species and their regional occupancy were very similar to previous studies of diatoms in boreal streams. In addition, these data concur with patterns known for multicellular organisms suggesting that in this respect diatoms may not differ from groups of organisms with larger body sizes.

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Section: Introductionmentioning

confidence: 97%

Distribution of epipelic diatoms in artificial fishponds along environmental and spatial gradients

et al. 2008

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“…For example, research on epipelic diatoms from fishponds in Central and Northern Moravia, Czech Republic, showed that 24 h was necessary to trap some larger diatoms, such as Pinnularia and Amphora (Lysa´kova´et al, 2007). In our samples, the epipelic diatoms were Navicula, Frustulia, Pinnularia and Brachysira.…”

Section: Optimum Time To Harvest Motile Diatomsmentioning

confidence: 86%

An improved coverslip method for investigating epipelic diatoms

Yang¹,

Flower²,

Battarbee³

2010

European Journal of Phycology

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The traditional coverslip method for harvesting motile diatoms was improved and standardized by determining optimum times for diatom harvesting; by using opaque Petri dish bases as experimental chambers; and by preparing coverslips by burning. Three experiments were conducted to evaluate the harvesting efficiency of the coverslip method. Experiment 1 was performed to reveal the spatial distribution of epipelic diatoms on the coverslips after exposure periods ranging from 2 to 36 h. The transect count results were supplemented using an Inverse Distance Weighted algorithm and showed that after 8 h exposure the epipelic diatoms began to accumulate at the coverslip margin. Therefore, 8 h was identified as the optimum time for the coverslip method to capture epipelic diatoms efficiently for the samples. However, the optimum time could vary between sites because of differences in diatom composition, light intensity and other environmental conditions. Experiment 2 revealed that the numbers of epipelic diatoms harvested from opaque chambers were 15.6% higher than those harvested from transparent chambers, indicating that opaque sides and base reduce multi-directional diatom migration. Experiment 3 indicated that the burning method was more efficient than the traditional method (directly counting fresh diatoms) because it makes identification easier and yields higher densities of diatoms. All experiments demonstrated that the coverslip method harvested more epipelic diatoms, made identification easier than the traditional method, enabling permanent slides to be created. In addition, the method makes it possible to estimate in situ epipelic cell densities, if the sediment area is known.

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“…Although leaf litter from surrounding trees contributes to the sediment accumulation, the main source of eutrophication is intensive agriculture in surrounding fields and untreated sewage waters from the village of Bílá Lhota . By contrast to other ponds (LySáková et al 2007) Bílá Lhota has relatively high conductivity. The fishpond is not used for fish production and served as a wastewater recipient until 2004.…”

Section: Methodsmentioning

confidence: 99%

The influence of the coagulant PAX-18 on Planktothrix agardhii bloom in a shallow eutrophic fishpond.

Lelková¹,

Rulı́k²,

Hekera³

et al. 2008

Fottea

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Abstract:For the first time in the Czech Republic, the PAX-18 coagulant has been used to restore a eutrophic fishpond. The polyaluminium hydrochloride coagulant was applied repeatedly to a shallow eutrophic fishpond in spring 2005. Two cylindrical plastic enclosures were used to isolate parts of the pond as untreated controls. Selected environmental variables were measured in situ. Water samples were analyzed regularly for nutrients, chlorophyll a concentration and phytoplankton abundance and structure with special focus on Planktothrix agardhii. The PAX-18 treatment led to a marked increase in the N/P ratio and changes in the structure and abundance of phytoplankton in the fishpond and P. agardhii blooms were eliminated in the fishpond. By contrast, P. agardhii dominated the phytoplankton in the control enclosures, as it had in the fishpond in 2004, prior to the PAX-18 treatment.

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The epipelic algae of fishponds of Central and Northern Moravia (The Czech Republic).

Cited by 12 publications

References 4 publications

Distribution of epipelic diatoms in artificial fishponds along environmental and spatial gradients

Distribution of epipelic diatoms in artificial fishponds along environmental and spatial gradients

An improved coverslip method for investigating epipelic diatoms

The influence of the coagulant PAX-18 on Planktothrix agardhii bloom in a shallow eutrophic fishpond.

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