Wyniki wyszukiwania - Biblioteka Nauki

1

Distribution and community structure of microphytoplankton in relation to increasing anthropogenic impact along coastal waters of Jeddah, the central Red Sea

100%

Al-Amri A. A. , Qari H. A. , El-Sherbiny M. M.

Oceanological and Hydrobiological Studies

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2020

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tom Vol. 49, No. 2

193--205

EN

Seasonal distribution and diversity of surface phytoplankton have been studied in relation to anthropogenic activities at seven locations along the coastal waters of Jeddah, Saudi Arabia in 2017. The concentration of nitrite, nitrate, ammonia, phosphate and silicate varied over wide ranges: 0.04–20.27, 0.05–29.3, 0.22–78.16, 0.02–25.90 and 43–24.50 μmol l-1, respectively. Inorganic nutrients, phytoplankton biomass and density were at eutrophic levels at two lagoon locations (4 and 5), while other coastal locations showed oligotrophic characteristics of the Red Sea. Phytoplankton biomass was positively correlated with all measured inorganic nutrients. The total phytoplankton density varied between 52.4 × 103 and 40800 × 103 cells m-3 (average 6249.9×103 ± 10797×103 cells m-3). A total of 174 species of phytoplankton (95 diatoms, 75 dinoflagellates, 3 cyanophytes and 1 silicoflagellates) were recorded in this study, with the dominance of diatoms (95.1%). Higher densities observed at lagoon locations were mainly due to the proliferation of the diatom species Skeletonema costatum and Chaetoceros decipiens. In terms of diversity, dinoflagellates were more numerous than diatoms in July, otherwise mostly diatoms dominated. On the other hand, cyanophytes were more abundant in November. Based on the present study, anthropogenic activities (especially sewage effluent) in Jeddah coastal waters had a significant impact on the phytoplankton densities and diversity.

2

Investigation of the sewage pollution zone in the marine coastal waters by chemical and bacteriological indices

100%

Korzeniewski K. , Korzeniewska J.

Oceanologia

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1979

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tom 11

3

Remotely operated ship used for measurements in coastal waters

100%

Marks R. , Suwalski G.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 3

EN

A remotely operated model ship has been constructed to provide a mobile platform for measurements in the coastal waters. on board both dissolved oxygen and water temperature microcomputer probes as well as data loggers along with a water pump were deployed. This set-up allowed us to cross the coastal breaking wave zone and trace both oxygen and water temperature with a frequency of 1-15 seconds, as well as to collect samples of subsurface water. The constructed model was successfully used under conditions of high wind speed and during the winter, when measurements in coastal waters are most difficult and dangerous. Data on dissolved oxygen distribution showed enhanced oxygen evasion taking place within the breaking wave paths along the coastal barriers. Results indicate that breaking waves control the dissolved oxygen and other gaseous content in the coastal surface waters as well as their water-to-air fluxes.

4

First record of the oriental shrimp Palaemon macrodactylus M. J. Rathbun, 1902 in the Baltic Sea

86%

Janas U. , Tutak B.

Oceanological and Hydrobiological Studies

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2014

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tom 43

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nr 4

5

Decomposition study of in vivo phytoplankton absorption spectra aimed at identifying the pigments and the phytoplankton group in complex case 2 coastal waters of the Arabian Sea

86%

Shaju S. S. , Minu P. , Srikanth A. S. , Ashraf P. M. , Vijayan A. K. , Meenakumari B.

Oceanological and Hydrobiological Studies

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2015

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tom 44

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nr 3

6

Low-active high-density Noctiluca scintillans cells in surface seawater

86%

Tada K. , Asahi T. , Kitatsuji S. , Nomura M. , Yamaguchi H. , Ichimi K.

Oceanologia

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2020

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tom No. 62 (3)

402--407

EN

Noctiluca scintillans is an important member of the mesozooplankton in terms of biomass and production in the Seto Inland Sea, Japan. The densities and adenosine triphosphate (ATP) contents of N. scintillans cells were measured. Vertical profiles of N. scintillans cellular activity in the coastal water were determined and the ATP contents were high at middle layers, with a maximum depth of 10 m. ATP contents were low in the surface and lower layers. These results suggest that active N. scintillans cells in subsurface layers with low density play an important role in the coastal ecosystem, and high-density cells in the surface water are not active.

7

Satellite estimates of the long-term trend in phytoplankton size classes in the coastal waters of North-Western Bay of Bengal

86%

Miranda J. , Lotliker A. A. , Baliareingh S. K. , Jena A. K. , Samanta A. , Sahu K. C. , Kumar T. S.

Oceanologia

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2021

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tom 63

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nr 1

8

Evaluation of morphodynamics of Miani Hor, a coastal lagoon of Lasbela, Balochistan, Pakistan

86%

Syed N. A. , Siddiqa T. , Sohoo N.

Oceanologia

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2020

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tom 62

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nr 1

9

An attempt to determine trophic structure of the bottom fauna in coastal waters of the Gulf of Gdansk

86%

Wiktor K.

Oceanologia

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1985

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tom 21

10

The slender sunfish, Ranzania laevis (Actinopterygii, Tetraodontiformes, Molidae), in the coastal waters of the Oman Sea

86%

Jawad L. , Al-Mamary J. , Al-Kharusi L.

Acta Ichthyologica et Piscatoria

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2010

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tom 40

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nr 2

EN

Captures of the slender sunfish, Ranzania laevis, are reported off the coastline of the cities of Sohar and Seeb, Oman Sea, Sultanate of Oman in February and March 2009. Their association with the environmental factors such as warming process is discussed.

11

Distribution of oil, grease and polycyclic aromatic hydrocarbons in coastal water and sediments of Suez Bay

86%

Elmorsi R.

Oceanological and Hydrobiological Studies

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2021

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tom Vol. 50, No. 4

373--384

EN

The permanganate index (PI), oil and grease (O&G), and 17 polycyclic aromatic hydrocarbons (PAHs) were analyzed in surface sediment and water samples collected at 13 sites along the western coast of Suez Bay (SB). PI and O&G in the SB coastal seawater ranged from 9.6 mg O2 l−1 and 17.0 mg l−1 to 16.0 mg O2 l−1 and 37.0 mg l−1, respectively. The level of polycyclic aromatic hydrocarbons (PAH) in water and sediment in the SB offshore area was determined by gas chromatography/flame ionization detection. The concentration ranged from 0.574 to 16873.2 ng g−1 in the sediment and 0.502 to 43.540 ng l−1 in water. The collected data were compared with values reported in the literature. The possible source and origin of pollution was also assessed based on the determined relative PAH levels at the study sites, the ratio of low molecular mass PAHs (LPAHs) to high molecular mass PAHs (HPAHs), and molecular indices of samples.

12

Morphological characteristics of South Baltic lumpfish, Cyclopterus lumpus L., 1758

86%

Lampart-Kaluzniacka M. , Heese T.

Acta Ichthyologica et Piscatoria

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2000

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tom 30

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nr 2

EN

Morphological characteristic of lumpfish caught in the spring of 1995 in coastal waters of the Southern Baltic Sea near Unieście and Chłopy have been outlined in this paper. In total 140 fish were used for measurements. The analysis of countable features of fish revealed that the number of fin rays was as follows: D2 10-11; A 9-11; P 18-24. Also tubercles arranged in three rows situated on body sides were counted. Characteristics of 19 morphometric features have been set out; 17 features were described with indices expressed as percentage of the standard length. Sexual dimorphism refers to the head and fin dimensions.

PL

Tasza jest rybą żyjącą w Atlantyku, występującą również w stosunkowo mało wysolonych wodach Morza Bałtyckiego. W pracy przedstawiono zagadnienia związane z morfologią tego gatunku. Ryby do badań pozyskano z łowisk w okolicach Unieścia i Chłopów, w lutym 1995 roku. Analiza cech policzalnych dotyczyła liczby promieni w płetwach (piersiowych, drugiej grzbietowej i odbytowej), oraz liczby guzków kostnych znajdujących się w 3 rzędach na każdym boku ciała. Dla płetw ustalono następującą formułę: D2 10-11, A 9-11, P 18-24. Liczba guzków kostnych charakteryzowała się wysokimi współczynnikami zmienności, co świadczy o dużej plastyczności tej cechy w badanej populacji. Analiza cech wymierzalnych dotyczyła 19 zmiennych, z których 17 zostało opisane za pomocą indeksów, wyrażonych w % długości ciała. Spośród 17 przebadanych zmiennych indeksowanych, aż u dziewięciu średnie wartości cech samic i samców okazały się statystycznie istotne. Samce posiadały masywniejszą głowę, mocniejsze szczęki i większe przyssawki niż samice, jednak na podstawie wyglądu głowy i przyssawki nie zawsze można było jednoznacznie ustalić płci. Badając siłę związku korelacji pomiędzy długością ciała a ccchami wymierzalnymi, stwierdzono dużą wartość diagnostyczną cech indeksowanych, prowadzonych dla pomiarów wzdłuż osi ciała ryby. Najwyższe współczynniki korelacji zanotowano dla zależności długości ciała (mm) a odległości przedodbytowej (mm) (r = 0,826), oraz dla długości ciała (mm) a odległości przedgrzbietowej (mm) (r = 0,770).

13

Attenuation of ultraviolet irradiance in North European coastal waters

86%

Aas E. , Hojerslev N. K.

Oceanologia

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2001

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tom 43

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nr 2

EN

A total of 439 measurements of downward ultraviolet irradiance in North European coastal waters have been analysed,half of which have been taken from other authors. The depths Z(10%) where the irradiance is reduced to 10% of its surface value vary by one order of magnitude in the open coastal waters,b oth at wavelengths of 310 nm (0.3–10.4 m) and 380 nm (1.2–13.0 m). In the fjords and estuaries the depth ranges are reduced to 0.08–6.1 m at 310 nm and 0.18–7.7 m at 380 nm. Mixing with saline ocean waters can increase these light penetration depths to more than 10 m,while river water can reduce them to a few centimetres.

14

Coastal lakes and marine intrusions on the Southern Baltic coast

86%

Drwal J. , Cieslinski R.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr 2

15

Palaemon elegans - a new component of the Gulf of Gdańsk macrofauna

86%

Janas U. , Zarzycki T. , Kozik P.

Oceanologia

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2004

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tom 46

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nr 1

EN

The present paper reports on the occurrence of the prawn Palaemon elegans Rathke in the coastal waters of the Gulf of Gdańsk in the years 2002–2003, and in other regions of the Baltic Sea as recorded by various authors.

16

Sky glint correction in measurements of upward radiance above the sea surface

86%

Olszewski J. , Kowalczuk P.

Oceanologia

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2000

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tom 42

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nr 2

EN

An experiment has been performed to determine the upward water-leaving radiance by non-contact measurement of the total upward and downward radiance above the sea surface from a moving ship. The method for achieving this aim is described: the radiance meters are both tilted in such a way that the upward radiance meter can ‘see’ that part of the measured downward radiance which would be reflected if the water surface were smooth and which is not derived directly from solar glitter. Both meters are firmly fixed in a special frame, which ensures that the required orientation is the most probable one. Time records of the measured parameters are analysed. The results are presented in several forms: frequency (histogram) analysis appears to be the most promising one.

17

Presence of the broad-nosed pipefish [Syngnathus typhle] in coastal waters of the Gulf of Gdansk

86%

Tarnowska K. , Sapota M. R.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr 2

18

The first recorded bloom of Prorocentrum minimum (Pavillard) Schiller in the coastal zone of the Gulf of Gdańsk

86%

Witek B. , Plinski M.

Oceanologia

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2000

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tom 42

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nr 1

EN

Prorocentrum minimum (Pavillard) Schiller has occurred in the Gulf of Gdańsk in low abundance for several years. However, in summer 1997 a significant increase in the numbers of cells was noted. In the same year a P. minimum bloom was recorded for the first time in one of the harbour basins in Gdynia, giving rise to a brown-red coloration of the water.

19

Influence of wind climate changes on the mean sea level and current regime in the coastal waters of West Estonia, Baltic Sea

86%

Suursaar U. , Kullas T.

Oceanologia

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2006

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tom 48

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nr 3

EN

The response of semi-realistic wind speed increase scenarios to the mean sea level and current regime of semi-enclosed sub-basins in the Baltic Sea is studied with a 2D hydrodynamic model. According to the model output of spatial mean sea levels, an increase in the westerly wind component by 2 m s−1 leads, for example, to a mean sea level rise of up to 3 cm in windward locations in the study area. The sea level change patterns depend on the wind scenario and coastline configuration. The increases in wind speed considered here also lead to enhanced water exchange through the straits, strengthening of the basin-scale circulation, enhancement of up- and downwelling, and increased bottom stresses near coasts.

20

Hemimysis anomala G.O. Sars, 1907 (Crustacea, Mysidacea) - first record in the Gulf of Gdańsk

86%

Janas U. , Wysocki P.

Oceanologia

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2005

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tom 47

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nr 3

EN

The present paper reports on the occurrence of Hemimysis anomala G.O. Sars, 1907 (Crustacea, Mysidacea) in the coastal waters of the Gulf of Gdańsk in the years 2002–2005.