Yury Deart

Yury Deart
Severtsov Institute of Ecology and Evolution · Laboratory for Ecology and Morphology of Marine Invertebrates

Diplom

About

33
Publications
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Citations
Introduction
Yury Deart currently works at the Laboratory for Ecology and Morphology of Marine Invertebrates, Severtsov Institute of Ecology and Evolution. Yury does research in Marine Biology, Zoology and Biostatistics. His main current project is about the long-term dynamic of macrobenthic communities in the Barents Sea. He also works on some projects about symbiotic communities in Vietnam
Education
September 2005 - May 2010
Lomonosov Moscow State University
Field of study
  • Faculty of Biology, Department of Invertebrate Zoology

Publications

Publications (33)
Article
Full-text available
Small fionid nudibranch specimens collected within a Chaetopterus sp. tubeworm are described here as a new species Tenellia chaetopterana sp. nov. This case is the first example of symbiotic association between a mollusс and an annelid host among cladobranch sea slugs. The external morphology of this species suggests it is adapted for living inside...
Article
Full-text available
To assess whether closely related host species harbour similar symbiotic communities, we studied two polychaetes, Chaetopterus sp. (n=11) and Chaetopterus cf. appendiculatus (n=83) living in soft sediments of Nhatrang Bay (South China Sea, Vietnam). The former harboured the porcellanid crabs Polyonyx cf. heox and Polyonyx sp., the pinnotherid crab...
Article
Full-text available
The symbiotic community associated with a scleractinian coral Pocillopora verrucosa has been studied along the Red Sea coast of Saudi Arabia from Al Wajh to the entrance of the Gulf of Aqaba. Forty colonies have been sampled from 2- to 15-m depth in 2 areas, southern and northern. Thirty-six associated species were found, including 15 symbionts and...
Article
Full-text available
Abra prismatica (Montagu, 1808) and Gari fervensis (Gmelin, 1791) were found in the Russian sector of the Barents Sea in 2008–2010 for the first time. These data allowed us to propose the expansion of their geographical range by at least 300 km to the east. Such a range expansion is probably preconditioned by the current warming trend observed for...
Article
Full-text available
Four species of Onoba H. Adams et A. Adams, 1852 are reported from the Barents Sea and adjacent waters of Arctic Basin and White Sea: O. aculeus (Gould, 1841), O. semicostata (Montagu, 1803), O. leptalea (Verrill, 1884) and O. improcera Warén, 1996. Onoba karica Golikov, 1986 is considered as a synonym of O. leptalea. Both O. mighelsi (Stimpson, 18...
Article
The impact of the introduced red king crab (RKC), Paralithodes camtschaticus, in the Barents Sea was mostly studied through its direct predation on native species. This study uses stable isotope analysis of carbon and nitrogen to characterize major trophic groups (including grazing sea urchins) and specifically looks at RKC's trophic position and n...
Article
Full-text available
Coryphellina rubrolineata (Gastropoda: Nudibranchia: Flabellinidae) was believed to be a widespread tropical species demonstrating high diversity in external and internal morphological traits. In this paper, we perform an integrative analysis of the C. rubrolineata species complex based on samples collected in Vietnam waters, combined with availabl...
Article
Full-text available
The variability of the species composition and community structure of coral ectosymbiotic invertebrates was studied using the reef-building coral Pocillopora verru-cosa sampled from Dongsha Atoll (the northernmost atoll of the South China Sea). Overall, we discovered 61 symbiotic species, comprising 17 specialized obligate species and 44 generalist...
Article
Full-text available
Benthic communities of the partially isolated deep fjordic lagoons Linjalampi and Sisajarvi in the inner part of Ambarnaya Bay, Varanger-fjord, Barents Sea, are influenced by the limited water exchange and surge in combination with other abiotic and biotic factors. Among the latter, the presence of numerous red king crabs (Paralithodes camtschaticu...
Article
This study presents the first record of two eulimid species, Stilapex zebra and Pyramidelloides sp., found on the arms of the brittle star Ophiothrix (Acanthophiothrix) purpurea on Spratly Islands (Truong Sa). Previously eulimids were found on ophiuroids only in central Vietnam (Nhatrang Bay), while the current study is the first symbiotic associat...
Article
Full-text available
Донные сообщества частично изолированных ковшовых губ (лагун) кута губы Амбарной (Линьялампи и Сисяярви) отражают влияние ограничения водообмена и волнения в сочетании с другими абиотическими и биотическими факторами. Среди последних особенно важную роль может играть присутствие многочисленной группировки камчатского краба (Paralithodes camtschatic...
Poster
Studies on heterobranch fauna of Southern Vietnam are very fragmented. To date only two revisions of local species composition were conducted, however they were based on a sparse sampling in restricted areas. In total 150 species of heterobranchs were registered, among which about 120 species were nudibranchs. Nevertheless, this number is much lowe...
Article
Full-text available
In this study we analyze a spatial distribution and abundance of red king crab Paralithodes camtschaticus (Tilesius 1815) in different seasons in the semi-enclosed bay by diving observations. The study was performed in Zelenaya Inlet, which is a small fjord type bay, protected from waves by a shallow sill and 2 small islands on the entrance. The ab...
Article
Full-text available
Abstract—Based on the data of benthic surveys of 2010–2012, three benthic communities: a shallow-water community with the dominance of Scoloplos spp., Nucula tennuis, and Scalibregma inflatum; a deep-water community with the dominance of Chaetosone sp.; and a community of mixed sediments, have been distinguished in soft sediments in marine lakes Si...
Article
Full-text available
Based on the data of benthic surveys of 2010-2012, three benthic communities: a shallow-water community with the dominance of Scoloplos spp., Nucula tennuis, and Scalibregma inflatum; a deep-water community with the dominance of Chaetosone sp.; and a community of mixed sediments, have been distinguished in soft sediments in marine lakes Sisjajarvi...
Data
Main data on the two Chaetopterus hosts Main data on the two Chaetopterus hosts (tube length in cm, body volume in ml), symbionts’ abundance and number of species, and number of specimens of each symbiotic species found in each individual host specimen tube.
Data
Body volume and tube length of Chaetopterus cf. appendiculatus Body volume (ml) and tube length (cm) of the 45 specimens of Chaetopterus cf. appendiculatus selected to estimate the relationship between these two measures in the analysis of community structure.
Article
Full-text available
The paper considers the influence of the geographical position and local conditions on the structure and abundance of symbiotic communities (SCs) associated with the crinoid Himerometra robustipinna. Two water areas at the coast of Vietnam (Nhatrang Bay and the Anthoy Archipelago; our data), Hansa Bay (Papua, New Guinea; Deyen et al., 2006), and th...
Article
Full-text available
Рассмотрено влияние географического положения и локальных условий на состав и обилие симбиотических сообществ (СС), ассоциированных с морскими лилиями Himerometra robustipinna. Сравниваются 2 акватории у побережья Вьетнама (залив Нячанг и архипелаг Антхой), залив Ханса (Папуа Новая Гвинея) [13] и Большой Барьерный Риф (Австралия) [14]. Выявлено схо...
Conference Paper
Full-text available
Genus Acrocephalus is an extraordinary diverse group of birds and it had been an object for countless studies. However there are still many questions left and several species remain almost unstudied. Blunt-winged warbler could be counted among them for we still confront the lack of data about the range, habitat, behavior and breeding biology of thi...

Questions

Questions (2)
Question
There is a quite a lot of ecological papers, dedicated to kelp - urchin barren transformation. But how to define “urchin barren” properly?
“Urchin barrens” are usually considered as an alternative state of COLLAPSED kelp ecosystem on hard substrates in upper sublittoral, so they likely mean to occur INSTEAD of kelp forest and be sea urchin dominated. But how can they be compared to “Lithothamnion+Sea urchin” dominated communities, which occur UNDER kelp belt?
The general scheme of vertical communities distribution on the hard bottom on Murman coast of Barents sea usually involve communities in such an order: laminarian kelp belt=>filamentous red algae belt=>Lithothamnion belt=> gravel or sand slope. I do not see any direct evidence that sea urchins always maintain the lower border of dense kelp belt(although sometimes this seems evident and sea urchin aggregations may occur on the deeper border of a kelp), and it is not light limited on 15m depth or so…
On the other hand, that seems that the “Urchin barrens” are usually observed visually from the boat, by fishermen, or by a scientist using “sea telescope”. So, this observation was likely limited by seawater transparence (probably up to 5m depth in Barents sea in summer). So, could we define typical “urchin barren” as the hard bottom community dominated by coralline algae and sea urchins in depth from 0 to 5m(or to max observable depth from the surface)?
Question
My colleagues are working on feeding preferences of macro symbionts of feather stars. They gathered data on stable isotopes from both sea lilies and its symbionts(shrimps, crabs, ,polychaetes, myzostomida etc). The results are quite surprising and not easy to interpret, so we want to have some reference points. Some people (who work with stable isotopes) advise us, that it might be more useful to collect data on primary consumers (not primary producents) from our area to have such a reference point.
But than we realized, that it is not an easy task to find really specialized primary consumer on the coral reef, as there is little known about food spectrum of most coral reefs inhabitant and many of them are mixotrophic.

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Projects

Project (1)
Project
Participants: Mikheev VN, Dgebuadze P.Y, Mekhova E.S., Deart Y.V., The role of symbiotic assemblages in ecosystems of the World Ocean was underestimated for a long time. Only in the last two - three decades, due to the progress in the study of the ocean depths and the increased interest in biodiversity estimates, the symbiotic communities (SC) structure, their role in the functioning of marine ecosystems, the role of symbionts in the regional and global diversity gained momentum. The aim of the project is to analyze the biological interactions between the symbionts, as parameters regulated the composition and abundance of SC in marine ecosystems. The role of antagonistic and cooperative interactions in SC of different degrees of complexity, from simple symbionts–host associations to multi-species assemblages, consisting of dozens of symbiotic species (association of hydrobionts with sponges, crinoids, scleractinian corals) will be considered.