Ksenia N. Kosobokova

Ksenia N. Kosobokova
P.P. Shirshov Institute of Oceanology · Marine Biology and Ecology

Doctor of Science, PhD

About

116
Publications
26,215
Reads
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3,233
Citations
Introduction
Dr. Ksenia Kosobokova is a recognized expert on Arctic marine zooplankton. She has over 160 scientific publications on Arctic zooplankton taxonomy, biodiversity, distribution, various taxa life cycles strategies and reproductive biology. She participated in numerous Russian and international research expeditions to the Arctic Ocean and Antarctic with >800 days at sea and conducted her studies in all Russian Arctic seas (the Barents, Kara, Laptev, East-Siberian, Chukchi and the White seas).
Additional affiliations
May 1980 - March 2020
Russian Academy of Sciences
Position
  • Researcher
Description
  • Completed her PhD at Shirshov Institute of Oceanology, Russian Academy of Sciences in 1981, and completed her Habilitation at the same institute in 2010.
October 1975 - present
P.P. Shirshov Institute of Oceanology
Position
  • Leading Researcher
Education
September 1970 - May 1975
Lomonosov Moscow State University
Field of study
  • Biological Faculty, Department of Invertebrate Zoology

Publications

Publications (116)
Article
Full-text available
The calanoid copepod Calanus glacialis dominates the mesozooplankton biomass in the Arctic shelf seas, but its smaller North Atlantic sibling Calanus finmarchicus is expanding northwards and may potentially replace it if the climate continues to warm. Here we studied the population structure, overwintering strategies, gonad maturation and egg produ...
Article
Full-text available
The diel vertical migration (DVM) of zooplankton is one of the largest species migrations to occur globally and is a key driver of regional ecosystems and the marine carbon pump. The dramatic changes in the Arctic environment in recent years, mainly associated with sea-ice decline, may have wide significance for the Arctic shelf ecosystems includin...
Article
Full-text available
Marine zooplankton are key players in pelagic food webs, central links in ecosystem function, useful indicators of water masses, and rapid responders to environmental variation and climate change. Characterization of biodiversity of the marine zooplankton assemblage is complicated by many factors, including systematic complexity of the assemblage,...
Article
Full-text available
Characterization of species diversity of zooplankton is key to understanding, assessing, and predicting the function and future of pelagic ecosystems throughout the global ocean. The marine zooplankton assemblage, including only metazoans, is highly diverse and taxonomically complex, with an estimated ~28,000 species of 41 major taxonomic groups. T...
Article
Full-text available
In recent decades, the central Arctic Ocean has been experiencing dramatic decline in sea ice coverage, thickness and extent, which is expected to have a tremendous impact on all levels of Arctic marine life. Here, we analyze the regional and temporal changes in pan‐Arctic distribution and population structure of the key zooplankton species Calanus...
Article
DNA-based analyses have become powerful tools for characterizing the metazoan biodiversity of diverse marine ecosystems. Metabarcoding (i.e., large-scale taxonomic identification of complex samples via high-throughput sequencing of a DNA barcode region) frequently uses hypervariable regions of the nuclear eukaryotic 18S ribosomal RNA (rRNA) gene. H...
Article
The population size structure, vertical distribution, gonad maturation, individual fecundity and embryonic development of the chaetognath Eukrohnia hamata were studied in the northernmost part of its distribution area, the Arctic Ocean. Analysis was based on stratified zooplankton samples collected in the Canada Basin during July 2005 that covered...
Article
The Arctic Ocean is overwhelmingly forced by its lateral boundaries, and interacts with, the global system. For the development of nested conceptual models of the Arctic Ocean ecosystem we here choose the full pan-Arctic as our focal scale. Understanding the pan-Arctic scale, however, requires that we look at the underlying scales of its major comp...
Article
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Continental slopes – steep regions between the shelf break and abyssal ocean – play key roles in the climatology and ecology of the Arctic Ocean. Here, through review and synthesis, we find that the narrow slope regions contribute to ecosystem functioning disproportionately to the size of the habitat area (∼6% of total Arctic Ocean area). Driven by...
Chapter
This chapter summarizes global patterns and mechanisms of both ecological and historical crustacean biogeography resulting in the contemporary species distributions described over the past decades. In the pelagic realm, hydrographic features such as ocean currents, physical depth profiles, and latitudinal temperature gradients are major structuring...
Article
Pelagic polychaetes collected in the deep Arctic Ocean between 2011 and 2016 during three expeditions of R/V Polarstern were investigated using morphological taxonomic and molecular methods based on DNA sequences for portions of the mitochondrial 16 S and nuclear 18 S and 28 S rDNA genes. A comparison of our results on arctic Pelagobia cf. longicir...
Article
Full-text available
Half of the Arctic Ocean is deep sea (>1000 m), and this area is currently transitioning from being permanently ice-covered to being seasonally ice-free. Despite these drastic changes, it remains unclear how organisms are distributed in the deep Arctic basins, and particularly what feeds them. Here, we summarize data on auto-and heterotrophic organ...
Conference Paper
Full-text available
Severnaya Zemlya Archipelago (SZA) is the last sizeable archipelago on Earth discovered in 1913 by the Russian expedition on the icebreaking transports Taimyr and Vaigach. SZA separates two marginal seas of the Arctic Ocean, the Kara Sea in the west and the Laptev Sea in the east, and its coastal zone from the biological and ecological standpoints...
Article
Full-text available
The East-Siberian Sea (ESS) plays a significant role in circulation of surface water and biological production in the Arctic, yet due to its remote location and historically difficult sampling conditions remains the most understudied of all Arctic shelf seas, with even baseline information on biological communities absent in literature. We aim to f...
Article
Full-text available
Adult males of Calanus copepods in the Arctic are mainly observed between late autumn and late spring, and are seldom recorded during summer. Due to logistical constraints, there are still relatively few studies on zooplankton in high-latitude regions during the winter, and subsequently, little is known about Calanus males. Here, we present data on...
Chapter
A comprehensive review of the state-of-the art knowledge on structure, ecology, and distribution of zooplankton communities of the White Sea is provided. Based on the detailed species inventory and understanding of the zoogeographical origin of the planktonic fauna of the White Sea, a comparison of zooplankton communities of different regions and b...
Article
Full-text available
Copepods of the genus Calanus play a key role in marine food webs as consumers of primary producers and as prey for many commercially important marine species. Within the genus, Calanus glacialis and Calanus finmarchicus are considered indicator species for Arctic and Atlantic waters, respectively, and changes in their distributions are frequently...
Article
Full-text available
Planktonic copepods of the genus Calanus play a central role in North Atlantic/Arctic marine food webs. Here, using molecular markers, we redrew the distributional ranges of Calanus species inhabiting the North Atlantic and Arctic Oceans and revealed much wider and more broadly overlapping distributions than previously described. The Arctic shelf s...
Article
Copepods of the genus Pseudocalanus are important members of zooplankton communities in temperate and polar shelf regions, but few studies have focused on their species-specific biology due to the very subtle morphological differences between the species. We assess the distribution, population structure and production of four co-occurring species o...
Article
Full-text available
По материалам, собранным в прол. Фрама, а также в глубоководной евразийской части Арктического бассейна к северу от Карского моря и моря Лаптевых летом 1995 и 1997 гг., впервые охарактеризованы размерный состав и особенности созревания массового вида щетинкочелюстных Eukrohnia hamata (Möbius, 1875) (Chaetognatha) в ар-ктических водах. Описаны морфо...
Article
Full-text available
The size structure of the population, morphology of the reproductive system, and gonad maturation of the chaetognath Eukrohnia hamata (Möbius, 1875) (Chaetognatha) were studied for the first time from zooplankton samples collected in Fram Strait and the deep Eurasian basin of the Arctic Ocean north of the Kara and Laptev seas in the summers of 1995...
Book
Издание состоит из шести тематических глав по физической географии, океанологии, гидрометеорологии, фауне и экологии, истории исследований и экономической освоенности акватории моря Лаптевых и прилегающих территорий. В атласе отражена подробная информация о типизации берегов моря Лаптевых, а также приведены актуальные сведения о морских млекопитающ...
Article
Full-text available
This study examines changes in egg production rates of two co-occurring Pseudocalanus species, P. acuspes and P. minutus, in response to changing temperatures (0, 3, 6, 9 and 12°C) in the White Sea. The boreal P. acuspes (sample size >650 individuals) increased its reproductive rate gradually across the entire range of temperatures from 0 to 12°C....
Article
Full-text available
Siberian marginal seas cover large parts of the marine Arctic and host unique zooplankton communities. Detailed knowledge of their community structure and life history traits is a prerequisite to predict their response to ongoing and future climate and anthropogenic changes although winter data is extremely rare. Here data are presented from winter...
Article
Full-text available
This study examines changes in egg production rates of two co-occurring Pseudocalanus species, P. acuspes and P. minutus, in response to changing temperatures (0, 3, 6, 9 and 12°C) in the White Sea. The boreal P. acuspes (sample size >650 individuals) increased its reproductive rate gradually across the entire range of temperatures from 0 to 12°C....
Poster
Full-text available
В рамках Российско-Американского Долговременного Исследования Арктики «РУСАЛКА» (http://www.arctic.noaa.gov/rusalca/) в регионе Чукотского моря и Берингова пролива были выполнены три комплексные океанографические экспедиции в 2004, 2009, 2012 гг. Полученные гидрологические данные позволили построить карты распространения водных масс Тихоокеанского...
Article
Full-text available
The current understanding of Arctic ecosystems is deeply rooted in the classical view of a bottom-up controlled system with strong physical forcing and seasonality in primary-production regimes. Consequently, the Arctic polar night is commonly disregarded as a time of year when biological activities are reduced to a minimum due to a reduced food su...
Article
Full-text available
Using data from a number of summer surveys of the Chukchi Sea over the past decade, we investigate aspects in which the benthic fauna, sediment structure, and zooplankton there are related to circulation patterns and shelf hydrographic conditions. A flow speed map is constructed that reveals the major pathways on the shelf. Regions of enhanced flow...
Article
Full-text available
The Chukchi Sea pelagic ecosystem, which is finely tuned to the region’s seasonal ice formation and retreat, has been undergoing dramatic oceanographic change related to shifting sea ice cover and increasing temperatures over the last decades. We examine historical data sets on zooplankton communities in the central Chukchi Sea during the time peri...
Article
This review paper integrates the current knowledge, based on available literature, on the physical and biological conditions of the Amerasian and Eurasian basins (AB, EB) of the deep Arctic Ocean (AO) in a comparative fashion. The present day (Holocene) AO is a mediterranean sea that is roughly half continental shelf and half basin and ridge comple...
Article
The central Arctic Ocean is not isolated, but tightly connected to the northern Pacific and Atlantic Oceans. Advection of nutrient-, detritus- and plankton-rich waters into the Arctic Ocean forms lengthy contiguous domains that connect subarctic with the arctic biota, supporting both primary production and higher trophic level consumers. In turn, t...
Article
Full-text available
The Chukchi Sea shelf is a complex transition zone between the Pacific and Arctic Oceans, on which climate variation may have a profound impact. We examined summer zooplankton community structure of the western Chukchi Sea in Alaskan and Russian waters during 2004, 2009, 2010 and 2012 within the ongoing Russian-American Long-term Census of the Arct...
Article
Full-text available
Cyanea is a genus of large bloom-forming scyphozoans, including some of the most conspicuous representatives of megaplankton. Its taxonomy has been revised repeatedly throughout the last century due to the fact that most of the morphological characteristics of Cyanea species, such as color, structure of gastrovascular system and number of tentacles...
Article
Full-text available
The species composition and vertical distribution of radiolarians were studied from the plankton samples collected in the Amundsen, Makarov and Canada basins of the central Arctic Ocean. A total of 19 species was registered, including 11 species of Polycystina (seven Spumellaria and four Nassellaria) and eight species of Phaeodaria. The maps of hor...
Chapter
Full-text available
The lower trophic level taxa underpin the marine ecosystems of the Pacific Arctic Region (PAR). Recent field observations indicate that range shifts, and changes in the relative abundance of particular taxa have occurred within the last decade. Here we provide a region wide survey of the diversity and distribution of viruses, bacteria, archaea, aut...
Article
Full-text available
The species composition and vertical distribution of Radiolaria were studied from the plankton samples collected in the Amundsen, Makarov and Canada basins of the central Arctic Basin. A total of 19 species was registered, including 11 species of Polycystina (seven Spumellaria and four Nassellaria) and eight species of Phaeodaria. The maps of horiz...
Book
This monograph provides a comprehensive review of the state-of-the-art knowledge on the structure, functioning, and productivity of the zooplankton communities of the Arctic Ocean. Based on the broad species inventory, contemporary analyses, and understanding the zoogeographical origin of the Arctic Ocean planktonic fauna, a pan-arctic comparison o...
Article
Full-text available
The species composition and distribution of pelagic polychaetes were studied using plankton collected in the deep Arctic basin during expeditions of ice%breakers and drifting stations in 1975–2005. Adult individuals of four pelagic species were identified: Pelagobia longicirrata, Phalacrophorus pictus borealis, Tomopteris septentrionalis, and Typhl...
Article
Full-text available
This study examines some morphological aspects of the male and female reproductive system of Metridia longa, a common Arctic copepod, and discusses their biological implications. M. longa males exhibit dimorphic assymetry, and the population contains two morphotypes of males, which are mirror images of each other. The relative positions of asymmetr...
Article
Full-text available
This paper considers features of the external morphology and internal structure of the genital system of adult males and females of Metridia longa Lubbock from the White Sea, as well as related with them features of reproduction biology of this mass Arctic copepod. Males of M. longa are dimorphically asymmetric. In the population, there are two mor...
Chapter
Full-text available
The paper summarizes the current understanding of the structure, seasonal and inter-annual dynamics and productivity of the White Sea zooplankton communities based on historical and recent data collected within the international and national research oceanographic projects and the project of the Institute of Oceanology of Russian Academy of Science...
Article
Full-text available
The societal need for—and urgency of obtaining—basic information on the distribution of Arctic marine species and biological communities has dramatically increased in recent decades as facets of the human footprint alter Arctic marine biodiversity. The primary goals of this article are to present updated species inventories based on focused biodive...
Article
The societal need for-and urgency of obtaining-basic information on the distribution of Arctic marine species and biological communities has dramatically increased in recent decades as facets of the human footprint alter Arctic marine biodiversity. The primary goals of this article are to present updated species inventories based on focused biodive...
Article
Full-text available
Zooplankton was sampled in the Storfjord and ice-covered Barents Sea during March 2003. Environmental conditions represented a typical winter situation with low air temperatures, close pack ice, and extremely low chlorophyll concentrations. Polar water dominated the hydrographic regime in the upper layers. Zooplankton distribution reflected spatial...
Article
Full-text available
Metazoan zooplankton diversity is characterized for the oceanic environments of the Arctic Ocean, specifically the deep Nansen, Amundsen, Makarov and Canada Basins. Our species inventory is based on original records from 134 locations where stratified sampling of the entire water column was conducted from the surface to the bottom (or a maximum of...
Article
Full-text available
A new calanoid copepod species, Brodskius arcticus sp. nov. (family Tharybidae Sars, 1902), and three new species of a new genus Pertsovius gen. nov. (family Discoidae Gordejeva, 1975) are described from deep waters of the Arctic Canada Basin. The female of Brodskius arcticus differs from five of the other six known species of this genus in the abs...
Data
(*) Species collected by other sampling gears than plankton nets during the same expeditions (see Raskoff et al. 2010). (**) Species observed in the Arctic Ocean for the first time by other authors using sampling gears other than plankton nets during the same expeditions (see Raskoff et al 2010)
Chapter
IntroductionThe Background ArcOD ActivitiesUnknown AspectsInto the FutureAcknowledgmentsReferences
Article
Zooplankton species diversity and distribution are important measures of environmental change in the Arctic Ocean, and may serve as 'rapid-responders' of climate-induced changes in this fragile ecosystem. The scarcity of taxonomists hampers detailed and up-to-date monitoring of these patterns for the rarer and more problematic species. DNA barcodes...
Article
The distribution and egg production of Pseudocalanus species was studied in the Chukchi Sea during August 2004. Three species were identified throughout the study area, Pseudocalanus minutus, Pseudocalanus acuspes and Pseudocalanus newmani. The more subpolar/temperate P. newmani-dominated stations where water was warmer and likely influenced by Ala...
Article
Full-text available
Zooplankton were sampled in the Chukchi Sea along three transects between Alaska and Russia, plus four high-speed transects across the axis of Herald Valley in August of 2004. A total of 50 holoplanktonic species, along with a prominent assemblage of meroplankton were encountered; most were of Pacific Ocean origin. Copepods represented the most div...
Article
Full-text available
The Arctic Ocean is undergoing changes at an unprecedented rate because of global climate change. Especially poorly-studied in arctic waters are the gelatinous zooplankton, which are difficult to study using traditional oceanographic methods. A distinct zooplanktivore community was characterized in the surface 100 m by use of a Remotely Operated Ve...
Article
Full-text available
In order to provide a baseline understanding of gelatinous zooplankton biodiversity and distribution in the rapidly changing Arctic Ocean, 12 stations were sampled across the Canada Basin, Northwind Ridge, and Chukchi Plateau with detailed deep-water ROV observations and multinet tows down to 3000 m. The complex, multi-origin water layers of the Ar...
Article
The composition and biomass of the zooplankton community within the Canada Basin down to 3000 m was studied during July 2005 at 12 stations. A total of 111 species including 74 species of crustaceans (55 species of copepods, 2 euphausiids, 11 amphipods, 1 decapod, 5 ostracods), 17 cnidarians (12 hydromedusae, 1 scyphomedusae, 4 siphonophora), 1 for...
Article
Full-text available
The results of multiyear observations of the seasonal and inter-annual variability of the population structure, abundance, and biomass of the arctic calanoids copepod Calanus glacialis in the White Sea are presented. The spring season represents the most crucial period for the population’s seasonal dynamics. During the spring, the maximal abundance...
Article
Only a few historical assessments of the zooplankton biomass in the Arctic Ocean exist are difficult to compare due to methodological differences including incomplete sampling of the water column. We present assessments of the zooplankton biomass for 66 locations scattered over the Eurasian and Makarov Basins of the Arctic Ocean and analyze regiona...
Chapter
Full-text available
Results of 15-years joint Russian-German multidisciplinary studies in the Arctic are presented. The chapter summirises results of the zooplankton community studies in the Laptev Sea and adjacent Eurasin Basin from 1993 to 1998.