Horizontal distribution of the plankton rotifers Keratella cochlearis (Bory de St Vincent) and Polyarthra vulgaris (Carlin) in a small eutrophic lake

Saunders-Davies, A. P.

doi:10.1007/978-94-009-0465-1_18

Cited by 4 publications

(2 citation statements)

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“…According to field investigations and experimental laboratory studies provided by many authors, rotifer distribution in lakes is related to both abiotic factors, such as temperature (BÇRZINš and PEJLER, 1989;WATANABE, 1992), oxygen content (MIRACLE and ARMENGOL-DÍAZ, 1995), pH values (B - ERZINš and PEJLER, 1987), light intensity (SAUNDERS-DAVIES, 1989), and to biotic factors, such as food availability (POURRIOT, 1977;GILBERT and BOG-DAN, 1981;BOGDAN and GILBERT, 1987;ARNDT, 1993;HABDIJA et al, 1993), exploitative Table 1. Morphometric data of Lake Visovac.…”

Section: Introductionmentioning

confidence: 99%

Impact of Environmental Variables and Food Availability on Rotifer Assemblage in the Karstic Barrage Lake Visovac (Krka River, Croatia)

Špoljar¹,

Habdija

Primc-Habdija

et al. 2005

International Review of Hydrobiology

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Impact of Environmental Variables and Food Availability on RotiferAssemblage in the Karstic Barrage Lake Visovac (Krka River, Croatia)key words: karstic riverine lake, rotifer density and diversity, macrofilter-feeder rotifer, microfilter-feeder rotifer AbstractWe evaluated the impact of 18 environmental variables (physico-chemical, nutrients, food resources) on rotifer assemblage in the sub-Mediterranean karstic barrage Lake Visovac. In terms of the spacetime distribution the highest density of rotifers was noted in the summer period (average 386 ind/l, relative annual abundance 62%), and in the epilimnetic layer (average 309 ind/l, relative annual abundance 58%). A total of 41 rotifer taxa belonging to 22 genera and 14 families were identified. Three rotifer species: Gastropus stylifer, Synchaeta tremula and Trichocerca birostris were dominant and perennial during the annual investigation. Pearson's product-moment correlations and canonical correlation analysis suggest that temperature, pH values, alkalinity, chemical oxygen demand and chlorophyll a concentration significantly influenced rotifer density. According to rotifer food collection and selection, in Visovac Lake macrofilter-feeders predominated, and microfilter-feeders were in a minority. IntroductionMany recent studies have established the relationship between the plankton community density and diversity and limnological characteristics of different water body types, for instance: floodplains (DE AZEVEDO and BONECKER, 2003), backwaters (ARORA and MEHRA, 2003), riverine lakes (ECKERT and WALZ, 1998;WALZ and WELKER, 1998;FERNÁNDEZ-ROSADO and LUCENA, 2001), karstic lakes (HABDIJA et al., 1993;MIRACLE and ALFONSO, 1993;RODRIGO et al., 2000). Lake Visovac is a lentic dilatation of the Krka River and is bounded by two barriers with impressive waterfalls, Roški slap to the north and Skradinski buk to the south. With respect to the origin of the lake basin, Visovac Lake belongs to a group of karstic barrage lakes (HUTCHINSON, 1957). Water flowing through the karstic area precipitates calcite (limestone), which creates different sedimentary forms, one of them being barriers.According to field investigations and experimental laboratory studies provided by many authors, rotifer distribution in lakes is related to both abiotic factors, such as temperature (BÇRZINš and PEJLER, 1989;WATANABE, 1992), oxygen content (MIRACLE and ARMENGOL-DÍAZ, 1995), pH values (B - ERZINš and PEJLER, 1987), light intensity (SAUNDERS-DAVIES, 1989), and to biotic factors, such as food availability (POURRIOT, 1977; GILBERT and BOG-DAN, 1981;BOGDAN and GILBERT, 1987;ARNDT, 1993;HABDIJA et al., 1993) (GILBERT, 1985;KIRK, 1991), interference competition (GILBERT and STEM- BERGER, 1985;BURNS and GILBERT, 1986) and predation . According to KIRK (2002), rotifers show a gleaner-opportunistic trade-off. With such characteristics, they are able to adapt quickly to changing and fluctuating physico-chemical and hydrological conditions, which exist in barrage lakes. Thus, in freshwater communities ...

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Section: Introductionmentioning

confidence: 99%

Impact of Environmental Variables and Food Availability on Rotifer Assemblage in the Karstic Barrage Lake Visovac (Krka River, Croatia)

Špoljar¹,

Habdija

Primc-Habdija

et al. 2005

International Review of Hydrobiology

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“…The impact of phosphates led to the accumulation of rotifers including the dominant species Keratella cochlearis in the central and southern parts of the lake. K. cochlearis is considered as β-mesosaprobic species [67], but it is common in eutrophic lakes [68]. Both ammonia and phosphates mostly affected cyclopoid copepod Mesocyclops leuckarti positively.…”

Section: Statistical Mappingmentioning

confidence: 99%

Zooplankton as Indicator of the Ecological State of Protected Aquatic Ecosystems (Lake Borovoe, Burabay National Nature Park, Northern Kazakhstan)

Krupa

Romanova

Berkinbaev

et al. 2020

Water

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The enrichment of the protected Borovoe Lake with nutrients has taken place within the last 100 years, from the moment the first resort was formed on its shores. The purpose of this study was to assess the current ecological state of Borovoe based on the structure of zooplankton. According to the chemical data, in the summer of 2019, the content of nutrients in the water was, relatively, not high; the content of heavy metals was very low. Twenty-seven species were found in zooplankton. The average abundance of zooplankton was 988.8 thousand ind./m3 with a biomass of 1.52 g/m3. Rotifera dominated. Cladocera sub-dominated. The Shannon index values were 2.31 bit/ind. and 2.57 bit/mg; the values of Clarke’s W-statistics and Δ-Shannon were negative. The abundance of zooplankton increased more than nine times, but the average individual mass of an organism decreased from 0.0112 to 0.0016 mg over the past decade. Despite the relatively low content of nutrients, the structure of zooplankton demonstrated that the nutritional load on Lake Borovoe is currently close to critical. Statistical mapping of the data and redundancy analysis (RDA) showed that the primary source of lake pollution is the village of Borovoe and sanatoriums located on the southeast and northwest coasts.

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Horizontal distribution of rotifers in a subtropical shallow lake (Paraná floodplain, Argentina)

Paggi¹,

Muñoz²,

Frau³

et al. 2012

fal

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In water bodies where cladocerans are typically small or present in low biomass, such as in the tropics and subtropics of South America, rotifers may play a larger role in ecosystem functioning than in temperate lakes. The aim of this study was to analyze the horizontal distribution of richness and abundance of rotifers, their diel distribution patterns, and the relative importance of physical and biotic characteristics as their shaping factors, in a subtropical shallow vegetated lake of the Paraná River floodplain (Argentina). Three sampling stations were located along the major axis of the lake, one in open waters and two in littoral area dominated by the emergent Panicum elephan tipes, Cyperus alternifolius and floating mats of the filamentous algae Cladophora spp. Two further stations were located on the transverse axis. Rotifer samples were taken on four occasions (at noon and midnight) during a five week period in the summer to avoid possible changes in the pattern of distribution of macrophytes and hydrological variability of the lake. Rotifer richness was higher in the littoral zone whereas rotifer abundance was higher in the limnetic zone. Some rotifers, such as Brachionus havanaensis and Keratella tropica exhibited changes in their diel horizontal distribution with higher concentrations of organisms at vegetated zones during the day time. In contrast, Polyarthra sp. were more abundant at night-time in both limnetic and littoral areas. The heterogeneous horizontal distribution of rotifers cannot be explained by the rather homogeneous distribution of both physical environmental factors and phytoplankton abundance. Rotifer distribution may be related to a complex of factors including the presence or absence of vegetation, the relatively uniform distribution of visual predators (fishes) and the heterogeneous distribution of non-visual predators (insects and shrimps).

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Horizontal distribution of the plankton rotifers Keratella cochlearis (Bory de St Vincent) and Polyarthra vulgaris (Carlin) in a small eutrophic lake

Cited by 4 publications

References 4 publications

Impact of Environmental Variables and Food Availability on Rotifer Assemblage in the Karstic Barrage Lake Visovac (Krka River, Croatia)

Impact of Environmental Variables and Food Availability on Rotifer Assemblage in the Karstic Barrage Lake Visovac (Krka River, Croatia)

Zooplankton as Indicator of the Ecological State of Protected Aquatic Ecosystems (Lake Borovoe, Burabay National Nature Park, Northern Kazakhstan)

Horizontal distribution of rotifers in a subtropical shallow lake (Paraná floodplain, Argentina)

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