База данных: Электронная библиотека
Страница 3, Результатов: 25
Отмеченные записи: 0
21.
Подробнее
K50
Kivva, K.K.
Assessment of Primary Production in the Bering with New Approach [Электронный ресурс] / Kivva, K.K. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 73-84. - 2014
~РУБ Article
Рубрики: Bering Sea
Bioproductivity
Biochemistry
Ecosystems
Calculations
Okhotsk
Аннотация: Oceanographic surveys of high spatial resolution were carried out in the western Bering Sea during past few years, which allow estimating primary production in the region based on drawdowns of nutrients. Present work suggests a new method of net (≈ to new) and gross (≈ total) primary production assessment based on summer or autumn nutrients and dissolved oxygen profiles. For 2012, gross (or total) primary production in the region was in range of 50-250 g C m-2 a-1, while net community (or new) primary production reached 30-80 g C m-2 a-1. New to total production ratio was in range of 0.2-0.8. The presented new method revealed good agreement with previous studies and supposed for use in the future ivestigations.
K50
Kivva, K.K.
Assessment of Primary Production in the Bering with New Approach [Электронный ресурс] / Kivva, K.K. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 73-84. - 2014
Рубрики: Bering Sea
Bioproductivity
Biochemistry
Ecosystems
Calculations
Okhotsk
Аннотация: Oceanographic surveys of high spatial resolution were carried out in the western Bering Sea during past few years, which allow estimating primary production in the region based on drawdowns of nutrients. Present work suggests a new method of net (≈ to new) and gross (≈ total) primary production assessment based on summer or autumn nutrients and dissolved oxygen profiles. For 2012, gross (or total) primary production in the region was in range of 50-250 g C m-2 a-1, while net community (or new) primary production reached 30-80 g C m-2 a-1. New to total production ratio was in range of 0.2-0.8. The presented new method revealed good agreement with previous studies and supposed for use in the future ivestigations.
22.
Подробнее
L29
Lapina, N.M.
Biochemical Monitoring of the Russian Arctic Seas under the Climate Change [Электронный ресурс] / Lapina, N.M., Torgunova, N.I., Agatova, A.I. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 101-117. - 2014
~РУБ Article
Рубрики: Biochemistry
Monitoring
Climate
Hydrobionts
Ecosystems
Calculations
Аннотация: Quantities and biochemical composition of dissolved and particulate organic matter (OM) as well as rates of the OM transformation in the Russian Arctic seas are analyzed. There is a significant variability in the OM concentrations with the maximum concentrations of dissolved and particulate OM in the White and Kara seas, while the minimum ones were observed in the East-Siberian Sea. Rates of the OM oxidation were maximum in various frontal zones formed with water masses of different origin as well as the seasonal ice melting. It is shown that despite low temperatures in the Arctic marine ecosystems, there is an intensive transformation of both autochthonous, and allochthonous OM, because local phsycrophils expend low activation energies on oxidation and hydrolytic splitting of OM. In the Arctic seas, the main biochemical components of the dissolved OM are carbohydrates and lipids, while proteins and carbohydrates dominate in the particulate OM.
Доп.точки доступа:
Torgunova, N.I.
Agatova, A.I.
L29
Lapina, N.M.
Biochemical Monitoring of the Russian Arctic Seas under the Climate Change [Электронный ресурс] / Lapina, N.M., Torgunova, N.I., Agatova, A.I. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 101-117. - 2014
Рубрики: Biochemistry
Monitoring
Climate
Hydrobionts
Ecosystems
Calculations
Аннотация: Quantities and biochemical composition of dissolved and particulate organic matter (OM) as well as rates of the OM transformation in the Russian Arctic seas are analyzed. There is a significant variability in the OM concentrations with the maximum concentrations of dissolved and particulate OM in the White and Kara seas, while the minimum ones were observed in the East-Siberian Sea. Rates of the OM oxidation were maximum in various frontal zones formed with water masses of different origin as well as the seasonal ice melting. It is shown that despite low temperatures in the Arctic marine ecosystems, there is an intensive transformation of both autochthonous, and allochthonous OM, because local phsycrophils expend low activation energies on oxidation and hydrolytic splitting of OM. In the Arctic seas, the main biochemical components of the dissolved OM are carbohydrates and lipids, while proteins and carbohydrates dominate in the particulate OM.
Доп.точки доступа:
Torgunova, N.I.
Agatova, A.I.
23.
Подробнее
D84
Dudina, T.V.
Primary Production of Phytoplankton and Benthic Primary Producers' Community in the South-Eastern Barents Sea under Conditions of Polar Day [Электронный ресурс] / Dudina, T.V. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 155-168. - 2014
~РУБ Article
Рубрики: Phytoplankton
Barents Sea
Kola bay
Biochemistry
Ecosystems
Productivity
Аннотация: The daily dynamics of the primary producers' photosynthesis of the South-Eastern Barents Sea in the period of polar day was studied. The experimental work conducted in the Kola Bay coastal zone and on the Kola Section (33degrees30' E, 69-74degrees N). A modified oxygen method of light and dark bottles was used for the primary production estimation. Dissolved oxygen concentration was determined by Winkler. The microalgae photosynthetic activity is associated with daily PAR dynamics. All groups of marine algae retained circadian biological rhythms during polar day. The percentage of macrophytes accounted for major portion of the coastal primary production. Phytoplankton community produces about 1/3 of the total primary production. Phytoplankton starts taking the leading position as a primary organic matter producer towards the open sea. The level of primary production declines compared with the coastal area.
D84
Dudina, T.V.
Primary Production of Phytoplankton and Benthic Primary Producers' Community in the South-Eastern Barents Sea under Conditions of Polar Day [Электронный ресурс] / Dudina, T.V. // Modern methods for assessing the biological productivity of waters in industrial areas of the World ocean: VNIRO proceedings. - M.: VNIRO Publishing, 2014. - V. 152. - P. 155-168. - 2014
Рубрики: Phytoplankton
Barents Sea
Kola bay
Biochemistry
Ecosystems
Productivity
Аннотация: The daily dynamics of the primary producers' photosynthesis of the South-Eastern Barents Sea in the period of polar day was studied. The experimental work conducted in the Kola Bay coastal zone and on the Kola Section (33degrees30' E, 69-74degrees N). A modified oxygen method of light and dark bottles was used for the primary production estimation. Dissolved oxygen concentration was determined by Winkler. The microalgae photosynthetic activity is associated with daily PAR dynamics. All groups of marine algae retained circadian biological rhythms during polar day. The percentage of macrophytes accounted for major portion of the coastal primary production. Phytoplankton community produces about 1/3 of the total primary production. Phytoplankton starts taking the leading position as a primary organic matter producer towards the open sea. The level of primary production declines compared with the coastal area.
24.
Подробнее
S70
Sologub, D.
Distribution and Age Structure of Euphausiids Larvae at the Western Antarctic Peninsula (Subarea 48.1) [Электронный ресурс] / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 3-15. - 2015
~РУБ Article
Рубрики: Krill
Distribution
Stocks
Antarctic
Climate
Ecosystems
Аннотация: Euphausiids (Euphausiacea) are the key species in the trophic structure of ecosystems of the Southern Ocean. The data on the distribution and age structure of Euphausiids larvae were collected during R/V "Polarstern" expedition in January 2011 in the West Antarctic Peninsula region. Three types of distribution were found out among the four Euphausiids species: offshore (T. macrura and E. frigida), inshore (E. crystallorophias) and distribution at the shelf slope (E. superba). The densities of E. superba larvae in 2011 were higher than the results of previous studies in the 70's and 80's. This indicates a high recruitment rates in spite of rapid climatic changes in the Antarctic Peninsula region.
S70
Sologub, D.
Distribution and Age Structure of Euphausiids Larvae at the Western Antarctic Peninsula (Subarea 48.1) [Электронный ресурс] / Sologub, D. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 3-15. - 2015
Рубрики: Krill
Distribution
Stocks
Antarctic
Climate
Ecosystems
Аннотация: Euphausiids (Euphausiacea) are the key species in the trophic structure of ecosystems of the Southern Ocean. The data on the distribution and age structure of Euphausiids larvae were collected during R/V "Polarstern" expedition in January 2011 in the West Antarctic Peninsula region. Three types of distribution were found out among the four Euphausiids species: offshore (T. macrura and E. frigida), inshore (E. crystallorophias) and distribution at the shelf slope (E. superba). The densities of E. superba larvae in 2011 were higher than the results of previous studies in the 70's and 80's. This indicates a high recruitment rates in spite of rapid climatic changes in the Antarctic Peninsula region.
25.
Подробнее
P32
Patin, S.A.
Anthropogenic Impact on Marine Ecosystems and Living Resources: Sources, Effects, Problems [Электронный ресурс] / Patin, S.A. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 85-104. - 2015
~РУБ Article
Рубрики: Chemistry
Pollutions
Ecosystems
Resources
Methodology
Petroleum products
Аннотация: The present environmental situation in the World Ocean is characterized by the diversity and unevenness of human impact on marine ecosystems and living resources. An alarming trait of this global picture is the concurrence of highly bioproductive areas with regions of the heaviest anthropogenic impact. The most of the offshore and coastal human activities is accompanied by pollution of marine environment. The probable decrease of the overall biological productivity in coastal ecosystems due to chronic pollution is about 10%, as compared with the optimum production in a "pure" World Ocean. Potential risk of ecological catastrophes at the regional level is associated mainly with oil spills, eutrophication of coastal waters, and invasion of alien species. Relatively new factors of large-scale anthropogenic impact include appearance of small particles of plastics in the open ocean and "noise pollution" of water masses. Up to now, the generally accepted methodology of quantitative assessment of anthropogenic impact on marine ecosystems and living resources does not exist.
P32
Patin, S.A.
Anthropogenic Impact on Marine Ecosystems and Living Resources: Sources, Effects, Problems [Электронный ресурс] / Patin, S.A. // Commercial species and their biology: VNIRO proceedings. - M.: VNIRO Publishing, 2015. - V. 154. - P. 85-104. - 2015
Рубрики: Chemistry
Pollutions
Ecosystems
Resources
Methodology
Petroleum products
Аннотация: The present environmental situation in the World Ocean is characterized by the diversity and unevenness of human impact on marine ecosystems and living resources. An alarming trait of this global picture is the concurrence of highly bioproductive areas with regions of the heaviest anthropogenic impact. The most of the offshore and coastal human activities is accompanied by pollution of marine environment. The probable decrease of the overall biological productivity in coastal ecosystems due to chronic pollution is about 10%, as compared with the optimum production in a "pure" World Ocean. Potential risk of ecological catastrophes at the regional level is associated mainly with oil spills, eutrophication of coastal waters, and invasion of alien species. Relatively new factors of large-scale anthropogenic impact include appearance of small particles of plastics in the open ocean and "noise pollution" of water masses. Up to now, the generally accepted methodology of quantitative assessment of anthropogenic impact on marine ecosystems and living resources does not exist.
Страница 3, Результатов: 25