Macrozoobenthic communities of underwater landscapes in the shallow-water zone of southern Lake Baikal

Кравцова, Л. С.; Kamaltynov, Ravil M.; Karabanov, E. B.; Mekhanikova, I. V.; Sitnikova, T. Ya.; Рожкова, Н. А.; Slugina, Z. V.; Izhboldina, L. A.; Weinberg, I.V.; Akinshina, T.V.; Sherbakov, D. Yu.

doi:10.1023/b:hydr.0000029979.68265.3e

Cited by 26 publications

(22 citation statements)

References 11 publications

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“…comm.). D. geminata occurred as an epilith at 0.3-1.3 m depth at Bolshiye Koty Bay, where there are high rates of near-bottom currents and constant resuspension of fine clastic material (Kravtsova et al, 2004). In a further study in the same area, it was one of 23 diatom species in the community developing on bricks placed in March at 2-5 m depth (Kravtsova et al, 2006).…”

Section: Asiamentioning

confidence: 98%

Biology of the freshwater diatom Didymosphenia: a review

2009

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Features of the colonial diatom Didymosphenia are reviewed, especially D. geminata. Although there is a long record of its occurrence in north temperate regions, mass growths have been reported much more widely in recent years. Contrary to some statements in the literature, there are also reliable older records for the southern hemisphere, though the first report of mass growth was in New Zealand in 2004. The annual cycle of morphological changes in D. geminata in northern England, and probably elsewhere, includes a winter period when motile cells are attached to the substratum followed by spring when stalks start to develop. These raise cells into the water column and provide a site for phosphatase activity. Environmental factors associated with success include absence of extreme floods, high light, pH above neutral and nutrient chemistry. D. geminata often, but not always, occurs in waters where the N:P ratio is high for much of the year, but the key factor is the ratio of organic to inorganic phosphate. D. geminata thrives where organic P is predominant and the overall P concentration is low enough for organic P to be an important P source. It is unknown whether organic N can be used. Environmental changes increasing the relative importance of organic P are likely to favour D. geminata. Likely examples are increased N:P due to atmospheric N deposition and changes in form and seasonality of P release from organic-rich soils due to climatic warming. The nutrient chemistry of deep water released from dams to rivers also needs investigation. To what extent are genetic changes occurring in response to environmental changes and are new ecotypes spreading round the world? In spite of many adverse reports about D. geminata, such as detached mats blocking water pipes, there is still doubt about the extent to which it causes problems, particularly for fish. There have been few adverse effects on migratory salmonids in Europe and North America, but at least one report of harm to a brown trout population in USA. In New Zealand, it has caused serious problems for water sports, although it remains open to question how much adverse effect it has had on fish populations. If the presence of microcystins in or associated with D. geminata, as indicated recently for two populations, proves to be widespread and at sufficiently high concentration, their possible accumulation in fish requires study. Where control is required, this could Handling editor: Pierluigi Viaroli be achieved by enhancing the ratio of inorganic to organic phosphate in the water early in the growth season. Practical ways to achieve this are suggested.

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Section: Asiamentioning

confidence: 98%

Biology of the freshwater diatom Didymosphenia: a review

2009

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“…Similarly, the four bottom underwater complexes (beach, shallow-water terrace, underwater slope and underwater canyon) in Baikal littoral landscapes were defined by Kravtsova et al (2004). The authors showed the mosaic spatial distribution of biological communities along these complexes, and the dominance of gastropods in most of the communities.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

“…The authors showed the mosaic spatial distribution of biological communities along these complexes, and the dominance of gastropods in most of the communities. Baicaliids (2-11 coexistent species) prevailed among littoral gastropod assemblies, and small snails of Maackia herderiana (Lindholm 1909) were the dominant species among the baicaliids, inhabiting all three hydrodynamic zones and the four bottom underwater complexes on solid sediments (Kravtsova et al 2004;Sitnikova et al 2010;Maximova et al 2012). The snails of M. herderiana have been subdivided (Kozhov 1936) into three morphologically distinct forms or subspecies denoted as 'ribbed' (M. h. herderiana), 'middle' or weakly defined ribs (probably M. h. semicostulata Lindholm, 1909) and 'smooth' (M. h. laevis Kozhov, 1936) (Figure 1).…”

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confidence: 99%

“…We considered here the distribution of three morphotypes of the lithophilous Baikal endemic species along three dependent abiotic factors (depth, wave activity and type of substrate), although there are many other abiotic and biotic factors maintaining the heterogeneity of environments in the Baikal littoral (e.g. Kravtsova et al 2004). As the boundaries of the hydrodynamic zones are different in different regions of the Baikal littoral, the size of the bottom substrates is not equal and a wave force at the same depth of different geographical regions is dissimilar; thus, this is one of the reasons for the distinct compositions of morphotypes among the sampling sites.…”

Section: Shell Morphotypes and Habitatsmentioning

confidence: 99%

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On morphological and ecological evidence of adaptive differentiation among stony cliff littoral Baikal gastropods

Sitnikova

Maximova

2015

Journal of Natural History

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Three morpho-or ecotypes ('ribbed', 'middle' or 'ribless' shell and 'smooth') of lithophilous Maackia herderiana (Lindholm, 1909) (Caenogastropoda: Baicaliidae) were investigated along the hydrodynamic zones of four locations on the southwestern littoral of Lake Baikal in southeast Siberia. We found a prevalence of the ribbedshell morphotype inhabiting stones at a depth of 1.2-2.0 m, corresponding to the hydrodynamic zone of strong wave activity, and a predominance of the smooth-shell morphotype living on cliffy canyons at 21-31 m depth in the hydrodynamic zone where wave action is very weak or totally absent. Mixed groups of snails with ribbed, ribless and/or smooth shells were present on stonyboulder substrates at 3 to 15-19 m depth of the wave-cut and wave-weakening hydrodynamic zones. Ribbed-morphotype snails living in inshore and wave-cut hydrodynamic zones had a smaller shell size than did smooth-morphotype snails inhabiting zones where wave activity was weak or totally absent. The thickness of ribbed shells in the non-ribbed areas was equal to the thickness of smooth shells; ribs enhance the thickness of the shell by 3-4 times, thereby increasing the strength of ribbed shells against destructive wave action. On the basis of the different correlation coefficients of shell weight, soft body mass and total mass with increasing shell height, we assumed a growth differentiation between the ribbed and smooth morphotypes. We compared our results with data on ecotypes of some freshwater and marine gastropods. ARTICLE HISTORY

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“…This group has been extensively studied in Euro-American deep lakes (Ambrosetti and Barbanti, 2001;Barton, 2004;Dermott and Kerec, 1997;Grigorovich et al, 2003;Kravtsova et al, 2004;Lozano et al, 2001;Martin et al, 1999;Nalepa et al, 2003;Nocentini et al, 2001;Snimschikova and Akinshina, 1994), and Chinese shallow lakes (Chen et al, 1980;Jiang et al, 2006;Liang and Liu, 1995;Xu et al, 2003), but little attention has been paid to Chinese deep lakes so far.…”

Section: Introductionmentioning

confidence: 99%

Macrozoobenthic community of Fuxian Lake, the deepest lake of southwest China

2008

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Located in the Yunnan-Guizhou Plateau in southwest China, Fuxian Lake covers an area of 211 km 2 , with maximum depth of 155 m. It is known to have a unique fauna, including 14 described endemic species. In order to describe the zoobenthic community of the lake more completely, the present study was conducted from August 2002 to August 2003. Altogether 62 benthic taxa, including 22 oligochaetes, 21 molluscs and 18 insects were identified, of which the dominant taxa belonged to Potamothrix, Procladius and Paraprososthenia. The standing stocks of benthos were much higher in the littoral (824 ind/m 2 in density, 3.72 g/m 2 in biomass) than in the profundal region (23 ind/m 2 in density, 0.10 g/m 2 in biomass). Species richness was greatest in summer and standing stocks were larger in spring and summer than in other seasons. Analyses of functional feeding groups indicated that collector-gatherers and scrapers were predominant in entire lake. Stepwise multiple regression analysis demonstrated that the water depth is the most important factor affecting the distribution of macrozoobenthos.

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Macrozoobenthic communities of underwater landscapes in the shallow-water zone of southern Lake Baikal

Cited by 26 publications

References 11 publications

Biology of the freshwater diatom Didymosphenia: a review

Biology of the freshwater diatom Didymosphenia: a review

On morphological and ecological evidence of adaptive differentiation among stony cliff littoral Baikal gastropods

Macrozoobenthic community of Fuxian Lake, the deepest lake of southwest China

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