Testing effects of shore height level, sediment characteristics and vegetation cover on the seasonality of zoopsammon communities in the two boreal lakes differing in their trophic state

Lokko, Külli; Virro, Taavi; Kotta, Jonne

doi:10.1007/s10750-012-1210-1

Cited by 6 publications

(8 citation statements)

References 24 publications

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“…Many species-specific interactions between psammic rotifers and environmental factors were found in our previous study (Lokko et al 2013), but as evidenced by the current study, a combination of community indices (SDI and GRI) may produce a better general picture of seasonality and relationships between the ecological factors (incl. lake trophic status) and the community structure.…”

Section: Discussionsupporting

confidence: 52%

“…However, data on the composition of interstitial rotifer assemblages from the European Baltic ecoregion are very scanty. Our previous survey (Lokko et al 2013) revealed that rotifers were among the most abundant groups in the zoopsammon of two Estonian lakes with different trophic status. Rotifers are recognized as important carbon transporters in freshwater food webs (Nogrady et al 1993).…”

Section: Introductionmentioning

confidence: 97%

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The structure of psammic rotifer communities in two boreal lakes with different trophic conditions: Lake Võrtsjärv and Lake Saadjärv (Estonia)

Lokko

Virro

2014

Oceanological and Hydrobiological Studies

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Psammon communities are still poorly studied worldwide. The aim of the present study was to establish the structure of psammic rotifer communities including their diversity and quantitative parameters. A total of 41 rotifer taxa were found in hydro-, hygro-, and euarenal zones of eutrophic Lake Võrtsjärv and mesotrophic Lake Saadjärv during the study carried out in Estonia in 2008, including 11 rotifer species new to Estonia. In L. Võrtsjärv, the predominant rotifer taxa were Bdelloidea and Lecane psammophila. L. psammophila dominated in July and August and bdelloids prevailed in the rest of the year. In L. Saadjärv, the most abundant taxa were Lepadella ovalis, Keratella hiemalis, and Cephalodella megalocephala. The psammic rotifer community of L. Saadjärv proved to be more diverse than that of L. Võrtsjärv. Microphagous rotifers were dominant in L. Võrtsjärv. Raptorial feeders dominated in L. Saadjärv in summer and autumn and were more abundant at sites with coarser sand and low plant density.

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Section: Discussionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 97%

The structure of psammic rotifer communities in two boreal lakes with different trophic conditions: Lake Võrtsjärv and Lake Saadjärv (Estonia)

Lokko

Virro

2014

Oceanological and Hydrobiological Studies

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“…In our preceding studies (Lokko et al, 2013, 46 new zoopsammon taxa for the Estonian fauna were registered, including 25 rotifers, 17 testate amoebae, 1 cercozoan, 1 clitellate, 1 tardigrade, and 1 harpacticoid. The present study further adds new records of 11 rotifer, 19 amoebozoan, and 6 nematode taxa for Estonia (Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…At each sampling time various environmental parameters such as sand grain size, vegetation coverage, sand organic content, pH, temperature, and salinity were estimated. The details of measuring and estimating environmental parameters are described in Lokko et al (2013.…”

Section: Introductionmentioning

confidence: 99%

Taxonomic composition of zoopsammon in fresh and brackish waters of Estonia, a Baltic province ecoregion of Europe

Lokko

Virro²,

Kotta³

2014

Estonian J. Ecol.

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Zoopsammon communities, i.e. fauna dwelling in the interstitial sandy habitat at the water's edge, are largely understudied. The aim of the present study was to provide an overview of the taxonomic structure of zoopsammon in Estonian waters. The study is based on samples collected from four lakes across Estonia and from three sandy beaches on the Estonian coast of the Gulf of Finland, Baltic Sea, in 2008-2014. Animals from 12 phyla were found, of which the majority of rotifers and testate amoebae were identified to species level. A total of 156 taxa were determined, including 84 rotifer species and 39 testate amoebae species. In addition to the 46 new taxa for the Estonian fauna already registered in our previous works, the present study reports further 11 new rotifer, 19 testate amoebae, and 6 nematode taxa. The psammic communities in lake beaches had higher species richness than in coastal beaches, and the communities were more similar in coastal beaches than in lake beaches. The mesotrophic Lake Saadjärv had the highest taxon richness with 80 taxa from 10 phyla. Similarly, the number of testate amoebae species was higher in lake beaches than in coastal beaches. The number of taxa, especially the number of rotifer species, was lower in sampling sites with an elevated trophic state and/or human population density. The number of testate amoebae species was the highest in the hypertrophic Lake Verevi. As compared to testate amoebae, rotifer communities had a higher taxonomic richness at landscape scale characterized by variable communities both in time and space.

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“…This is probably related to its significant dynamics of transformation and the resulting necessity of organisms to adjust to the occurring environmental conditions. The composition of psammon includes bacteria, algae, protozoa, rotifers, nematodes, and also tardigrades and crustaceans (Lokko et al, 2013). According to Novitsky and MacSween (1989), bacteria constitute over 90% of the numbers of these microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

Nawrot¹,

Mieczan²

2014

Turk J Zool

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The objective of this study was to determine the abundance and biomass of microbial loop components in 2 lakes of different trophic status. The lakes (mesotrophic and eutrophic ones) were located in the Łęczna-Włodawa Lakeland. The effect of selected physical and chemical water parameters on this group of organisms was also analyzed. Psammon samples were collected during 3 seasons: spring, summer, and autumn 2011. In each of the lakes, samples were collected in the euarenal, higroarenal, and hydroarenal zones. The highest abundance and biomass of the microbial loop components were recorded in spring in the eutrophic lake. The mesotrophic lake showed an increase in flagellates in autumn with a decline in the abundance of ciliates. In the mesotrophic lake, the density of individual elements of the microbial loop was correlated with temperature and total organic carbon, and in the eutrophic lake with pH, chlorophyll a, and ammonium nitrogen. In both lakes, a significant correlation occurred between bacteria and ciliate abundances. In both trophic types of lakes, the highest correlations between bacteria and heterotrophic protists were noted in hydroarenal zone. In the euarenal and higroarenal zones, the correlations were weaker.

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Testing effects of shore height level, sediment characteristics and vegetation cover on the seasonality of zoopsammon communities in the two boreal lakes differing in their trophic state

Cited by 6 publications

References 24 publications

The structure of psammic rotifer communities in two boreal lakes with different trophic conditions: Lake Võrtsjärv and Lake Saadjärv (Estonia)

The structure of psammic rotifer communities in two boreal lakes with different trophic conditions: Lake Võrtsjärv and Lake Saadjärv (Estonia)

Taxonomic composition of zoopsammon in fresh and brackish waters of Estonia, a Baltic province ecoregion of Europe

Ciliates versus other components of the microbial loop in the psammolittoral zone: horizontal distribution

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