Nina Denisenko - Academia.edu (original) (raw)
Papers by Nina Denisenko
Diversity
An analysis of archival and literary materials, as well as recently collected data in coastal are... more An analysis of archival and literary materials, as well as recently collected data in coastal areas at 14 locations in the Eurasian seas showed that the diversity of biomass-dominating key bryozoan species is low, totaling 26 species, less than 1/15 of the total bryozoan fauna richness. Their number decreases eastward from 17 species with an average total biomass of >16 g/m2 in the Barents Sea to three species with an average biomass of about 3 g/m2 in the East Siberian Sea. In the Chukchi Sea, their number and average biomass increase to 10 species and ~12 g/m2, respectively. Average biomass strongly correlates with the number of species in each sea. Furthermore, variation in biomass is significantly correlated with the composition of bottom sediments and, in some locations, with depth. The marked decrease in the number of key species along the vector from Barents→Kara→Laptev→East Siberian Sea is due to a decline in the number of boreal and boreal–Arctic bryozoans of Atlantic or...
Figure 4. Escharoides jacksoni (Waters, 1900), material formerly placed in Escharoides jacksoni v... more Figure 4. Escharoides jacksoni (Waters, 1900), material formerly placed in Escharoides jacksoni var. rostrata (Kluge, 1946) (ZI 1/2364), bleached. (A) Colony encrusting a stem showing autozooids and ovicellate zooids; (B) ovicellate zooid with paired lateral avicularium; (C) autozooid with one lateral avicularia; (D) orifice of autozooid with characteristic plain suboral shelf. Scale bars: 200 mm (A); 100 mm (B, C, D).
Figure 3. Escharoides jacksoni (Waters, 1900), bleached. (A) Colony showing autozooids and ovicel... more Figure 3. Escharoides jacksoni (Waters, 1900), bleached. (A) Colony showing autozooids and ovicellate zooids (NHM 2006.07.31.2); (B) autozooid lacking avicularia and ovicellate zooid with paired lateral avicularia (ZI 50/ 354); (C) orifice of autozooid with characteristic plain suboral shelf (NHM 2006.07.31.2); (D) ancestrula and surrounding zooids (ZI 50/354). Scale bars: 1 mm (A); 100 mm (B, C); 200 mm (D).
Currently, > 4,000 Arctic macro- and megabenthic species are known, representing the majority ... more Currently, > 4,000 Arctic macro- and megabenthic species are known, representing the majority of Arctic marine faunal diversity. This estimate is expected to increase. • Benthic invertebrates are food to shes, marine mammals, seabirds and humans, and are commercially harvested. • Traditional Knowledge (TK) emphasizes the link between the benthic species and their predators, such as walrus, and their signi cance to culture. • Decadal changes in benthos biodiversity are observed in some well-studied regions, such as the Barents Sea and Chukchi Sea. • Drivers related to climate-change such as warming, ice decline and acidification are affecting the benthic community on a pan-Arctic scale, while drivers such as trawling, river/glacier discharge and invasive species have signficant impact on regional or local scales. • Increasing numbers of species are moving into, or shifting, their distributions in Arctic waters. These species will outcompete, prey on or offer less nutritious value ...
Invertebrate Zoology, 2014
An annotated checklist is given of Bivalvia species occurring deeper than 2000 m in the seas bord... more An annotated checklist is given of Bivalvia species occurring deeper than 2000 m in the seas bordering Europe. The checklist is based on published data. The checklist includes 252 species. For each species synonymy, data on localities in European seas and general species distribution are provided. Station data are presented separately in the present thematic issue. How to cite this article: Janssen R., Krylova E.M. 2014. Deep-sea fauna of European seas: An annotated species checklist of benthic invertebrates living deeper than 2000 m in the seas bordering Europe. Bivalvia // Invert.
Box 3.3.1: Benthic macro-and megafauna Distribution of major benthic invertebrate groups in the A... more Box 3.3.1: Benthic macro-and megafauna Distribution of major benthic invertebrate groups in the Arctic Arthropods (e.g., shrimps, crabs, sea spiders, amphipods, isopods) dominate taxon numbers in all Arctic regions, followed by polychaetes (e.g., bristle worms) and mollusks (e.g., gastropods, bivalves). Other taxon groups are diverse in some regions, such as bryozoans in the Kara Sea, cnidarians in the Atlantic Arctic, and foraminiferans in the Arctic deep-sea basins. This pattern is biased, however, by the meiofauna inclusion for the Arctic Basin (macro-and meiofauna size ranges overlap substantially in deep-sea fauna, so nematodes and foraminiferans are included) and the influence of a lack of specialists for some difficult taxonomic groups. Box figure 3.3.1 Regional pie charts showing the species/taxon number (in brackets) per region and the relative proportion of certain taxa in species richness. Regions have been sampled with one or several types of sampling gears, including different grabs, sledges and trawls, but also subjected to different levels of taxonomic resolution for the different taxon groups.
Paleontological Journal, 2008
... dig-nity, and when in trouble she quoted from memory poems congenial to her mood, especially ... more ... dig-nity, and when in trouble she quoted from memory poems congenial to her mood, especially those of Anna Akhmatova, which ... TB Leonova, DV Lisitsyn, AV Lopatin, IN Manankov, OP Mezentseva, LA Nevesskaja, LV Nekhorosheva, EA Nikulina, SV Nikolaeva, IV Novikov ...
The ecosystem of the Kara Sea is subjected to strong Arctic as well as continentalinfluences (riv... more The ecosystem of the Kara Sea is subjected to strong Arctic as well as continentalinfluences (river runoff) and, together with its coastal region, expected to become increasingly used for navigation and exploitation (e.g. of oil and gas resources) and changed by global climate alterations. The benthic compartment of the system is insufficiently known. Therefore, quantitative samples of the benthic invertebrate fauna were collected for analyses of species composition, distribution and biogeographic and community structures at 35 stations at water depths between 17 and 200 m from the estuarine and the southern parts of the Kara Sea in 1993. A total of 500 zoobenthos taxa were identified. Shannon diversity indexes varied from 0.42 to 5.35. The lower values correspond to estuarine parts of the study area, where other characteristics of the bottom fauna also reflect the strong influence of fresh water outflow from 0.42 to 5.35. The lower values correspond to estuarine parts of the study ...
Marine Pollution Bulletin, 2010
Marine Ecology Progress Series, 2003
Journal of Natural History, 2007
ICES Journal of Marine Science, 1999
Structural and functional characteristics of zoobenthos of the Cheshskaya Bay (SE Barents Sea) we... more Structural and functional characteristics of zoobenthos of the Cheshskaya Bay (SE Barents Sea) were studied at 21 stations in June/July 1995. Strong prevailing cyclonic and tidal currents result in relatively uniform temperature and salinity in the area. Sediments consist mainly of sand and pebbles, while the flux of suspended matter from rivers locally increases the share of finer fractions. Analysis of species composition (419 taxa), abundance (up to 4,200 ind m -2 and up to 29,000 ind m -2 with juveniles) and biomass (up to >6,000 g wet wt m -2 ) indicates high species richness in most parts of the bay, especially in the northeast. Analysis of community structure using production characteristics of species revealed a general predominance of suspension feeders partitioned into seven communities. The dominant species of these communities were Mytilus edulis and Balanus crenatus (Type 1), B. crenatus (Type 2), Modiolus modiolus and Verruca stroemia (Type 3), Flustra foliacea and ...
Diversity
An analysis of archival and literary materials, as well as recently collected data in coastal are... more An analysis of archival and literary materials, as well as recently collected data in coastal areas at 14 locations in the Eurasian seas showed that the diversity of biomass-dominating key bryozoan species is low, totaling 26 species, less than 1/15 of the total bryozoan fauna richness. Their number decreases eastward from 17 species with an average total biomass of >16 g/m2 in the Barents Sea to three species with an average biomass of about 3 g/m2 in the East Siberian Sea. In the Chukchi Sea, their number and average biomass increase to 10 species and ~12 g/m2, respectively. Average biomass strongly correlates with the number of species in each sea. Furthermore, variation in biomass is significantly correlated with the composition of bottom sediments and, in some locations, with depth. The marked decrease in the number of key species along the vector from Barents→Kara→Laptev→East Siberian Sea is due to a decline in the number of boreal and boreal–Arctic bryozoans of Atlantic or...
Figure 4. Escharoides jacksoni (Waters, 1900), material formerly placed in Escharoides jacksoni v... more Figure 4. Escharoides jacksoni (Waters, 1900), material formerly placed in Escharoides jacksoni var. rostrata (Kluge, 1946) (ZI 1/2364), bleached. (A) Colony encrusting a stem showing autozooids and ovicellate zooids; (B) ovicellate zooid with paired lateral avicularium; (C) autozooid with one lateral avicularia; (D) orifice of autozooid with characteristic plain suboral shelf. Scale bars: 200 mm (A); 100 mm (B, C, D).
Figure 3. Escharoides jacksoni (Waters, 1900), bleached. (A) Colony showing autozooids and ovicel... more Figure 3. Escharoides jacksoni (Waters, 1900), bleached. (A) Colony showing autozooids and ovicellate zooids (NHM 2006.07.31.2); (B) autozooid lacking avicularia and ovicellate zooid with paired lateral avicularia (ZI 50/ 354); (C) orifice of autozooid with characteristic plain suboral shelf (NHM 2006.07.31.2); (D) ancestrula and surrounding zooids (ZI 50/354). Scale bars: 1 mm (A); 100 mm (B, C); 200 mm (D).
Currently, > 4,000 Arctic macro- and megabenthic species are known, representing the majority ... more Currently, > 4,000 Arctic macro- and megabenthic species are known, representing the majority of Arctic marine faunal diversity. This estimate is expected to increase. • Benthic invertebrates are food to shes, marine mammals, seabirds and humans, and are commercially harvested. • Traditional Knowledge (TK) emphasizes the link between the benthic species and their predators, such as walrus, and their signi cance to culture. • Decadal changes in benthos biodiversity are observed in some well-studied regions, such as the Barents Sea and Chukchi Sea. • Drivers related to climate-change such as warming, ice decline and acidification are affecting the benthic community on a pan-Arctic scale, while drivers such as trawling, river/glacier discharge and invasive species have signficant impact on regional or local scales. • Increasing numbers of species are moving into, or shifting, their distributions in Arctic waters. These species will outcompete, prey on or offer less nutritious value ...
Invertebrate Zoology, 2014
An annotated checklist is given of Bivalvia species occurring deeper than 2000 m in the seas bord... more An annotated checklist is given of Bivalvia species occurring deeper than 2000 m in the seas bordering Europe. The checklist is based on published data. The checklist includes 252 species. For each species synonymy, data on localities in European seas and general species distribution are provided. Station data are presented separately in the present thematic issue. How to cite this article: Janssen R., Krylova E.M. 2014. Deep-sea fauna of European seas: An annotated species checklist of benthic invertebrates living deeper than 2000 m in the seas bordering Europe. Bivalvia // Invert.
Box 3.3.1: Benthic macro-and megafauna Distribution of major benthic invertebrate groups in the A... more Box 3.3.1: Benthic macro-and megafauna Distribution of major benthic invertebrate groups in the Arctic Arthropods (e.g., shrimps, crabs, sea spiders, amphipods, isopods) dominate taxon numbers in all Arctic regions, followed by polychaetes (e.g., bristle worms) and mollusks (e.g., gastropods, bivalves). Other taxon groups are diverse in some regions, such as bryozoans in the Kara Sea, cnidarians in the Atlantic Arctic, and foraminiferans in the Arctic deep-sea basins. This pattern is biased, however, by the meiofauna inclusion for the Arctic Basin (macro-and meiofauna size ranges overlap substantially in deep-sea fauna, so nematodes and foraminiferans are included) and the influence of a lack of specialists for some difficult taxonomic groups. Box figure 3.3.1 Regional pie charts showing the species/taxon number (in brackets) per region and the relative proportion of certain taxa in species richness. Regions have been sampled with one or several types of sampling gears, including different grabs, sledges and trawls, but also subjected to different levels of taxonomic resolution for the different taxon groups.
Paleontological Journal, 2008
... dig-nity, and when in trouble she quoted from memory poems congenial to her mood, especially ... more ... dig-nity, and when in trouble she quoted from memory poems congenial to her mood, especially those of Anna Akhmatova, which ... TB Leonova, DV Lisitsyn, AV Lopatin, IN Manankov, OP Mezentseva, LA Nevesskaja, LV Nekhorosheva, EA Nikulina, SV Nikolaeva, IV Novikov ...
The ecosystem of the Kara Sea is subjected to strong Arctic as well as continentalinfluences (riv... more The ecosystem of the Kara Sea is subjected to strong Arctic as well as continentalinfluences (river runoff) and, together with its coastal region, expected to become increasingly used for navigation and exploitation (e.g. of oil and gas resources) and changed by global climate alterations. The benthic compartment of the system is insufficiently known. Therefore, quantitative samples of the benthic invertebrate fauna were collected for analyses of species composition, distribution and biogeographic and community structures at 35 stations at water depths between 17 and 200 m from the estuarine and the southern parts of the Kara Sea in 1993. A total of 500 zoobenthos taxa were identified. Shannon diversity indexes varied from 0.42 to 5.35. The lower values correspond to estuarine parts of the study area, where other characteristics of the bottom fauna also reflect the strong influence of fresh water outflow from 0.42 to 5.35. The lower values correspond to estuarine parts of the study ...
Marine Pollution Bulletin, 2010
Marine Ecology Progress Series, 2003
Journal of Natural History, 2007
ICES Journal of Marine Science, 1999
Structural and functional characteristics of zoobenthos of the Cheshskaya Bay (SE Barents Sea) we... more Structural and functional characteristics of zoobenthos of the Cheshskaya Bay (SE Barents Sea) were studied at 21 stations in June/July 1995. Strong prevailing cyclonic and tidal currents result in relatively uniform temperature and salinity in the area. Sediments consist mainly of sand and pebbles, while the flux of suspended matter from rivers locally increases the share of finer fractions. Analysis of species composition (419 taxa), abundance (up to 4,200 ind m -2 and up to 29,000 ind m -2 with juveniles) and biomass (up to >6,000 g wet wt m -2 ) indicates high species richness in most parts of the bay, especially in the northeast. Analysis of community structure using production characteristics of species revealed a general predominance of suspension feeders partitioned into seven communities. The dominant species of these communities were Mytilus edulis and Balanus crenatus (Type 1), B. crenatus (Type 2), Modiolus modiolus and Verruca stroemia (Type 3), Flustra foliacea and ...