Distribution of Gastropoda in the Littoral Zone of Lake Baikal

Sitnikova, T. Ya.; Shirokaya, Alena A.; Maksimova, N. V.; Slugina, Z. V.; Тимошкин, О. А.

doi:10.1615/hydrobj.v46.i3.10

Cited by 8 publications

(12 citation statements)

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“…Kobeltocochlea martensiana —Starostin, 1926: 19 (distribution); Kozhov, 1928: 95; Kozhov, 1931: 69 (shell size, distribution in Bolshiye Koty on mixed sediments at depths of 2 to 100 m); Shadin, 1933: 148, Figure 130; Kozhov, 1936: 32–33, Table I, Figures 13–15, Table X, Figures 5–9 (morphology, distribution, and key to identification); Kozhov, 1941: 547, Figure 7 (morphology of the nervous system); Kozhov, 1945: 278, Figure 1 (male reproductive organs morphology); Kozhov, 1950: 4–13 (female reproductive system, reproduction, and egg morphology); Shadin, 1952: 240, Figure 173 (general information and key to identification); Poberezhnyi, 1989: 6 (diploid number of chromosomes 2 n = 34); Starobogatov & Sitnikova, 1990: 501, Figure 1 (adaptation to stone substrate in Southern Baikal); Sitnikova, 1995: 78, Figure 9A (general information and key to identification); Röpstorf & Sitnikova, 2000: 192, Figure 3, Photo 5a, b (protoconch morphology); Röpstorf et al, 2003: 169 (stomach contents); Kravtsova et al, 2004: 198, Figure 2M (dominant species in benthic community of underwater slope at a depth of 8 m); Sitnikova et al, 2010: 7 (record from Birkhin Bay); Sitnikova et al, 2012: 105 (records of spirochete microbial community in crystalline style); Koroleva et al, 2015: 301 (structure and length of telomeric DNA); Maximova et al, 2017: 189 (age dynamics of telomere length).…”

Section: Resultsmentioning

confidence: 99%

Discordance of genetic diversification between deep‐ and shallow‐water species of Kobeltocochlea Lindholm, 1909 (Caenogastropoda: Truncatelloidea: Benedictiidae) endemic to Lake Baikal with the description of a new species, review of the genus, and notes on its origin

Sitnikova

Teterina

Maximova

et al. 2021

J Zool Syst Evol Res

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We describe a new species, Kobeltocochlea tamarae Sitnikova, Teterina & Maximova sp. nov., from Lake Baikal discovered in the Saint Petersburg methane seep at a depth of approximately 1400 m. The uncorrected genetic distance was 4.26% of the COI gene between this new species and K. falsipumyla collected from the Academic Ridge at depths between 157 and 163 m. The two shallow-water species, K. martensiana and K. olchonensis, differed in substrate preference and geographic habitats, with a genetic distance of 0.97% for COI. Phylogenetic analysis of mitochondrial (COI, 16S) and nuclear (ITSI, 28S) sequences indicated that Kobeltocochlea was paraphyletic with respect to other benedictiid genera Benedictia and Yaroslawiella, formed well-supported monophyletic groups. We revealed the discordance of morphological and genetic data within Kobeltocochlea and other benedictiids, which reflected their complicated history. The current knowledge of benedictiids does not allow for significant changes in the taxonomy of the Benedictiidae, except for synonymizing K. lindholmiana with K. olchonensis and Pseudobenedictia with Benedictia that were also investigated. We speculate that three main lineages of benedictiids originated from three populations of a single ancient species approximately 3.2 Ma. The speciation of deep-water species was probably driven independently by bathymetric isolation in the cold methane seeps of different geomorphological structures. The diversification of the third lineage consisting of littoral (including K. martensiana/K. olchonensis), deep-water, and eurybathic benedictiids may be explained by rapid adaptive radiation to intralacustrine environments.

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Section: Resultsmentioning

confidence: 99%

Discordance of genetic diversification between deep‐ and shallow‐water species of Kobeltocochlea Lindholm, 1909 (Caenogastropoda: Truncatelloidea: Benedictiidae) endemic to Lake Baikal with the description of a new species, review of the genus, and notes on its origin

Sitnikova

Teterina

Maximova

et al. 2021

J Zool Syst Evol Res

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“…1; Kamaltynov et al, 1998). Coexistence is common; more than 20 gastropod species have been recorded at a sandy habitat site (Lindholm, 1909;Kozhov, 1936;Sitnikova et al, 2010). It is axiomatic that these coexisting gastropods require sufficient amounts of food; an enquiry into ecological dynamics is critical for understanding how this system functions.…”

Section: Introductionmentioning

confidence: 99%

Resource partitioning in endemic species of Baikal gastropods indicated by gut contents, stable isotopes and radular morphology

et al. 2011

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We used multiple analytical methods to demonstrate resource partitioning in five species of coexisting endemic gastropods in the family Baicaliidae and the genus Megalovalvata (Valvatidae) in rocky walls of the underwater canyons in Lake Baikal. We tested whether filter-feeding baicaliids and valvatids consume and assimilate different food using data from gut contents, stable d 13 C and d 15 N isotopes and radular morphology, with subsequent combined analyses. Our results showed that the four baicaliid species assimilate microalgae, diatoms and bacteria, whereas the single Megalovalvata species mostly assimilates plant detritus. The d 15 N variations in the baicaliids reflect differences in their digestion of seston components, whereas the d 13 C similarity illustrates consumption of food particles derived from similar primary producers. Gut contents in the baicaliids were dominated by a single species of planktonic diatom, although more than 30 species of microalgae were recorded in all seasons. However, the composition and quantity of additional food particles varied by species. Our results showed that baicaliids have significant fine scale differences in radular tooth morphology, which may allow partitioning of food resources.

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“…Вони слугують тест-об'єктами під час екологічного моніторингу навколишнього середовища, бо здатні вилучати в індикаторних кількостях із довкілля та накопичувати у своєму організмі радіонукліди, різні макро-та мікроелементи, токсичні речовини неорганічного та органічного походження тощо (Kyrychuk, 2006;Kyrychuk and Muzyka, 2015;Kyrychuk and Muzyka, 2016). Саме черевоногі молюски являють собою таксономічно різноманітну, екологічно пластичну та досить розповсюджену групу гідробіонтів, роль яких у житті прісноводної екосистеми величезна (Orvain and Sauriau, 2002;Stadnychenko et al, 2005;Sitnikova et al, 2010). Молюски досить часто вступають у різноманітні взаємозв'язки у біогеоценозах, що визначає трофічну сітку багатьох гідроценозів.…”

Section: вступunclassified

Ecological and geographical characteristics of algal communities on gastropod shells of the river Uzh

2017

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Freshwater molluscs serve as test objects in the ecological monitoring of the environment, because they are able to extract in indicator quantity from the environment and accumulate in their bodies radionuclides, various macro-and micronutrients, toxic substances of inorganic and organic origin, and so on. The gastropods are a taxonomically diverse, ecologically plastic and rather widespread group of aquatic organisms, whose role in the life of freshwater ecosystems is very important. Molluscs often have various interactions in biogeocenoses that determines their trophic net. As a rule, these interactions occur in the form of ectocommensalism, endocommensalism, supercrescence, predation or parasitism. The latter type of interaction is the subject of many studies, but the epibionts of gastropods and bivalves are practically not studied and that causes the relevance of the research. Species composition of algal epibionts identifies specific sensitivity to the effects of certain environmental factors and reflects the processes occurring in water bodies of its ecosystem. This determines their efficient use for analyzing changes of water bodies, particularly in terms of complex anthropogenic pressure on aquatic ecosystems, as aquatic habitat. The aim of the research was to determine the ecological characteristics of algal communities on gastropod shells: Lymnaea stagnalis, L. auricularia and Viviparus viviparus (the Uzh river, Korosten district, Zhytomyr region). Identified microalgae communities were grouped and studied according to such indices as: confinedness to the habitat (substrate), temperature, fluidity and water oxygenating, saprobiological characteristics according to the Pantle-Buck system in the modification of Sladecek and Watanabe, salinity according to Kolbe's system, pH at Hustedt scale in the interpretation of M. M. Davydova and geographical confinedness of objects of study. Algae fouling on shells L. stagnalis, L. auricularia and V. viviparous are formed by benthic and benthic-planktonic species. Algal epibionts of studied communities are mainly confined to slowflowing waters. The basis of a floristic list according to the temperature in all studied groups of gastropods formed indifferent species. According to geographical distribution of algae fouling cosmopolitan species dominated. In relation to salinity according to Kolbe's system, most discovered species were indifferent oligo-galob. Algal communities are reliable indicators of one of the important indices of watercourse hydrochemical conditions-pH of water. Analysis of algal epibionts on gastropod shells of the river Uzh, showed the dominance of alkaliphiles and indifferent species (from the number of identified microalgae). According to saprobiological characteristic of water quality of the river Uzh predominance of o-saprobes. Analysis of indicator groups showed that the most numerous algal epibionts on shells were euresaprobe species. A detailed ecological and geographical characteristic of algae fouling on shells of studied groups of mollu...

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Distribution of Gastropoda in the Littoral Zone of Lake Baikal

Cited by 8 publications

References 0 publications

Discordance of genetic diversification between deep‐ and shallow‐water species of Kobeltocochlea Lindholm, 1909 (Caenogastropoda: Truncatelloidea: Benedictiidae) endemic to Lake Baikal with the description of a new species, review of the genus, and notes on its origin

Discordance of genetic diversification between deep‐ and shallow‐water species of Kobeltocochlea Lindholm, 1909 (Caenogastropoda: Truncatelloidea: Benedictiidae) endemic to Lake Baikal with the description of a new species, review of the genus, and notes on its origin

Resource partitioning in endemic species of Baikal gastropods indicated by gut contents, stable isotopes and radular morphology

Ecological and geographical characteristics of algal communities on gastropod shells of the river Uzh

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