Wyniki wyszukiwania - AGRO

1

Polychlorinated biphenyls in the sediments of the Odra River and its tributaries

100%

Rodziewicz M., Kaczmarczyk A., Niemirycz E.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr 2

This paper presents the results of polychlorinated biphenyls (PCBs) determination in sediments from different sites of the Odra River and its tributaries, collected in 1998-2002. It was found that concentrations of PCBs varied significantly. The results of individual congeners show that contents of PCBs 180 and 138 were the highest in the sediments investigated. For better identification of places most polluted by PCBs, PCB contents on TOC (total organic carbon) basis in surface sediments are presented.

2

Soil erosion during the younger Holocene in Germany

100%

Bork H. R.

Roczniki Akademii Rolniczej w Poznaniu. Melioracje i Inżynieria Środowiska

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1994

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tom 14

3

Seismostratigraphy of the nearshore sediments at Kepa Redlowska, Gulf of Gdansk

100%

Wicher W., Necel A.

Oceanological Studies

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2000

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tom 29

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nr 3

4

Organotin compounds in marine sediments

86%

Radke B., Staniszewska M., Wasik A., Namiesnik J., Bolalek J.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 5

643-654

Organotin compounds are widely used in almost all sectors of industry. Antifouling paints, which were applied to ship hulls to protect from fouling organisms, are the main source of TBT and TPhT derivatives loaded into the sea. The global ban on the use of these compounds in antifouling systems was introduced by the IMO in 2001. However, the ban did not solve the problem of the use of alternatives to TBT in the ship industry. Moreover, the issue of storing the organotins-containing dredged spoils at sea still remains unresolved. The pollution load deposited in port sediments may become an additional threat to the organisms that dwell in a given water basin. In such cases, it is necessary to establish appropriate norms for the quality classification of dredged spoils. Unfortunately, detailed guidelines concerning the disposal of dredged spoils are still lacking.

5

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The effect of plant cover on the mechanical composition of eroded soil

86%

Baryla A., Hejduk L.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 2

Water erosion causes migration of the finest soil particles and chemical compounds. The paper attempts to compare the mechanical composition of sediments susceptible to water erosion on the hillslopes with different cover crops. The research was conducted on the experimental plots in Puczniew. Its results showed that the composition of the sediment washed out from the fallow land significantly differed from that washed out from the plots with grass and barley crops. In the case of fallow land, soil particles were markedly larger. This might indicate the existence of a very hard mineral fraction.

6

Spatiotemporal variation of biochemical composition of organic matter and number of bacteria in core sediments of selected beaches of the southern Baltic Sea

86%

Bigus K., Astel A., Stec M., Piskula P.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2017

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tom 21

Sandy sediments coming from three beaches of the southern Baltic Sea were collected and analyzed. Investigated beaches were divided according to strength of anthropogenic impact and degree of sheltering. The first beach was situated in Ustka on the eastern side of the mouth of the Słupia River, second in Czołpino and the last one in Puck. Core sediment samples were collected seasonally, depending on the influence of the sea water on the examined sediments. At each station, surface sediments (0-5 cm) were collected as well as sediments at the depth of 10-15 cm. The general content of organic matter, proteins, lipids, carbohydrates, organic carbon and total bacterial number were determined. The results of the conducted tests reveal, that anthropopressure, degree of sheltering, the depth where the collected sediments were taken and the direct influence of the sea water on the sediments have impact on the chemical composition of organic matter and bacterial number in beach sediments.

7

Evaluation of carbon stock in the sediment of two mangrove species, Avicennia marina and Rhizophora mucronata, growing in the Farasan Islands, Saudi Arabia

86%

Eid E. M., Khedher K. M., Ayed H., Arshad M., Moatamed A., Mouldi A.

Oceanologia

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2020

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tom 62

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nr 2

8

Mercury fluxes through the sediment water interface and bioavailability of mercury in Southern Baltic Sea sediments

86%

Beldowski J., Miotk M., Pempkowiak J.

Oceanologia

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2009

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tom 51

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nr 2

263-285

Sediment cores collected in several areas of the southern Baltic were analysed for total mercury (HgTOT) and five operationally defined mercury fractions: HgA – contained in pore waters, HgF – bound to fulvic acids, HgH – bound to humic acids, HgS – bound to sulphide, and HgR – residual. An effort was made to quantify mercury fluxes at the sediment/water interface in the study area. Net mercury input, calculated on the basis of sedimentation rate and concentration in the uppermost sediments, ranged from 1 to 5.5 ng cm−2 year−1. Mercury remobilisation from sediments due to diffusion and resuspension was calculated from the proportion of labile mercury and the velocity of near-bottom currents. The results showed that the return soluble and particulate fluxes of mercury from the sediments to the water column constitute a substantial proportion of the input (20–50%), and are slightly higher than those found in pristine areas, although they are less than the values recorded in areas with a history of mercury contamination. In addition, an index was developed to assess the methylation potential of mercury in sediments. Mercury contained in pore waters, and mercury bound to fulvic and humic acids together with Loss on Ignition were used to calculate the semiquantitative methylation potential (Pm). Despite the simplicity of this approach, Pm correlates well with methyl mercury in fish from the study area.

9

Metal concentrations in chub, Leuciscus cephalus, from a submontane river

86%

Krywult M., Klich M., Szarek-Gwiazda E.

Acta Ichthyologica et Piscatoria

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2008

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tom 38

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nr 1

Background. Fish are often used as indicators of pollution levels in water environments. The omnivorous chub inhabiting rivers of Europe, including their more polluted parts, is a potentially suitable indicator. The information published, however, on the metal accumulation in the tissues of chub living in varyingly polluted waters (both polluted and unpolluted environments) is scarce. The presently reported study was conducted to examine the metal concentrations in selected tissues of chub living in a natural submontane river. Materials and Methods. Sediment samples (0–5 cm layer) and chub, Leuciscus cephalus (L.), were collected from the upper (stations 1–4) and lower (stations 5–8) sections of the Biała Tarnowska River in summer 2003. Fish age was determined from the otoliths. The AAS method was used to determine metal concentrations (Cd, Pb, Cu, and Zn) in sediment and chub tissues (spleen, liver, and muscle). Results. According to the values of the geochemical index (Igeo), the river sediments were not polluted by Pb, Cu, and Zn, while in various degrees polluted by Cd. Despite the low metal concentrations, the mean Cd and Cu concentrations were higher (c. 2× and 4×, respectively) in the upper part of the river compared to the lower section, while concentration of Pb and Zn were similar in the two areas. Chub accumulated the greatest amount of Cu in the liver, while the bulk of Cd, Pb, and Zn was found in the spleen. In the upper part of the river, elevated concentrations of trace elements in selected tissues of chub were found: Cu (spleen, muscle), Cd (spleen), Zn (muscle). The pollution status of the river, on the basis of trace element contents in the sediment, was also determined. Conclusion. The obtained results indicated tissue-specific metal accumulation in chub. Selected chub tissues are sensitive to Cd and Cu contents in the river sediment.

10

Paleochannel fills as an index of channel dynamics, the Sola River valley floor, the Carpathian foreland

86%

Grocholska J.

Quaestiones Geographicae

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1989-1990

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tom 15-16

11

Socio-economic aspects and impact of land use change on sediment production dynamics in the northeastern region of India

86%

Sharma U. C., Sharma V.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2010

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tom 42

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nr 1

209-217

The northeastern region of India, with an area of 255 090 km2, is predominantly hilly. Major socio-economic factors affecting sediment production in the region are; shifting cultivation, land tenure system, fast growing population, small land-holdings, deforestation and free range grazing. A multi-disciplinary long- -term study showed that 92.9 to 99.1% of rainwater can be retained in-situ, compared to 66.3% in shifting cultivation. Mean annual soil loss varied from 11.2 to 97.2 t km–2 in new land use systems as against 3621.3 t km–2 in shifting cultivation. The sediment load per litre of runoff from watersheds varied from 1250–20,300 mg suspended sediment, 5.4 to 23.6 mg NO3 – N, 2.3 to 6.5 mg P–PO4, 17.2 to 35.8 mg K2O, 0.4 to 1.8 mg Zn, 0.9 to 2.7 mg Mn, 6.5 to 12.0 mg Mg, 7.1 to 18.4 mg Fe and 4.0 to 7.2 mg SO4. The sediment transport from the catchments showed spatial and temporal variations.

12

Semionotus cf. bergeri Agassiz from the Lias of the Holy Cross Mountains, Poland

86%

Maslankiewiczowa Z.

Acta Palaeontologica Polonica

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1965

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tom 10

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nr 1

A specimen of a fish, described here as Semionotus cf. bergeri Agassiz, has been found in the siderite spherolite concretion from the gray claystones of the main ore-bearing series in horizon Ia of the "Edward" mine at Czarniecka Góra near Staporków. This specimen represents two halves of the exoskeleton from their inner sides. The caudal fin and the endoskeleton are lacking. Sediments, in which this fish has been found, belong to the Lower Lias.

13

Acid volatile sulphide estimation using spatial sediment covariates in the Eastern Upper Gulf of Thailand: multiple geostatistical approaches

86%

Chaikaew P., Sompongchaiyakul P.

Oceanologia

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2018

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tom 60

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nr 4

14

Can seabirds modify carbon burial in fjords?

86%

Weslawski J. M., Urbanski J., Gluchowska M., Grzelak K., Kotwicki L., Kwasniewski S., Legezynska J., Wiktor J., Wlodarska-Kowalczuk M., Zaborska A., Zajaczkowski M., Stempniewicz L.

Oceanologia

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2017

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tom 59

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nr 4

Two high latitude fjords of Spitsbergen (Hornsund 77°N and Kongsfjorden 79°N) are regarded as being highly productive (70 g and 50 gC m−2 year−1) and having organic-rich sediments. Hornsund has more organic matter in its sediments (8%), nearly half of it of terrestrial origin, while most of that in Kongsfjorden (5%) comes from fresh, marine sources (microplankton). Analysis of the carbon sources in both fjords shows that a major difference is the much larger seabird population in Hornsund-dominated with over 100 thousands pairs of plankton feeding little auks in Hornsund versus 2 thousand pairs in Kongsfjorden, and marine food consumption estimated as 5573 tonnes of carbon in Hornsund, versus 3047 tonnes in Kongsfjorden during one month of chick feeding period. Seabird colonies supply rich ornithogenic tundra (595 tonnes of C, as against only 266 tonnes of C in the Kongsfjorden tundra). No much of the terrestrial carbon, flushed out or wind-blown to the fjord, is consumed on the seabed – a state of affairs that is reflected by the low metabolic activity of bacteria and benthos and the lower benthic biomass in Hornsund than in Kongsfjorden.

15

Distribution of heavy metals in sediments of the Nemunas River [Lithuania]

86%

Kruopiene J.

Polish Journal of Environmental Studies

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2007

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tom 16

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nr 5

715-722

The distribution of heavy metals in sediments of the Nemunas river have been investigated. The most obvious anthropogenic impact has been observed in the middle part of the river. Nevertheless, sediment metal concentrations are within the limits of global, regional and local concentration levels. Particular attention has been paid to the Kaunas Reservoir. Although it is a part of the river, sediment characteristics, including metal distribution, have been found to follow the bottom dynamic zones, as in lakes. Metal concentrations in the Kaunas Reservoir are close to the concentrations in the upstream part of the Nemunas river, without indicating increased contamination with metals due to the lower flow velocity. An unusual Fe/Mn ratio is characteristic to the Reservoir. Fe concentrations confirm the occurrence of anoxic hypolimnion, whereas Mn concentrations indicate the possibility of Mn transport from the nearshore sediments to the deepest places.

16

Toxic heavy metals in sediments of Mahul Creek near Mumbai, India

86%

Singare P. U., Ansari M. V. A., Dixit N. N.

International Letters of Natural Sciences

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2014

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tom 10

The present study was performed for the period of one year from January 2013 to December 2013 in order to understand the level of toxic heavy metals in the sediments of Mahul Creek near Mumbai. The annual average concentration of heavy metals like Cr, Zn, Cu, Ni, Pb, Cd, As and Hg was found to be 277.5, 121.7, 100.3, 63.8, 21.5, 14.6, 10.4 and 4.9 ppm respectively. It is feared that this heavy metals accumulated in the creek sediments may enter the water thereby creating threat to the biological life of an aquatic ecosystem. The results of present study indicates that the existing situation if mishandled can cause irreparable ecological harm in the long term well masked by short term economic prosperity due to extensive industrial growth.

17

Past and recent lake eutrophication evidenced by microfossil (over 160 years) diatom succession in sediments, Lake Xingyun (Southwest China)

86%

Ji M., Li Y., Shen J.

Polish Journal of Ecology

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2013

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tom 61

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nr 4

Eutrophication, disappearance of aquatic vegetation and fish introduction are important disturbances of aquatic ecosystems, especially in plateau lakes, which are generally considered to be very vulnerable. This study investigated the effects of eutrophication, aquatic vegetation and fish introduction on the diatom community of Lake Xingyun by examining the changes of microfossil diatom assemblage. Results showed that diatom assemblages changed with increasing trophic level, decreasing aquatic vegetation and fish introduction. A mesotrophic, alkaliphilous species, Aulacoseira ambigua, was dominant in Lake Xingyun before 1950, which indicated the lake was mesotrophic in the period. Epiphytic diatom species (Achnanthes minutissima, Denticula sp., Gomphonema pumilum) presented high relative concentration between 1950–1980, which indicated aquatic vegetation had a higher cover in this period. The number of diatom species varied from 20 to 66, and to 52 with the change of aquatic vegetation from the past to present. Epiphytic diatoms except Achnanthes minutissima disappeared with the decrease of aquatic vegetation after 1980. Since 1980, with the sharply rising of TP and TN concentration, mesotrophic species (Aulacoseira ambigua) disappeared and eutrophic species (Cyclostephanos dubius, Fragilaria crotonensis, Aulacoseira granulata, Nitzschia palea) were dominant. It indicates the lake has evolved towards eutrophication after 1980. Our study indicated that change of trophic status and aquatic vegetation are important driving factors affecting diatom community composition in Lake Xingyun, but that fish introductions have also been an additional factor.

18

The biochemical composition of sedimentary organic matter in sandy beaches of various anthropopressure

86%

Trojanowski J., Bigus K.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2013

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tom 17

Beach sediments from two beaches at the Polish coast of the Baltic Sea were collected and analyzed. The sediments were collected in two seasons – winter and summer – at two stations, depending on the influence of the sea water on the examined sediments. At each station, surface sediments (0-5 cm) were collected as well as sediments at the depth of 10-15 cm. The results of the conducted tests reveal, that anthropopressure, the depth where the collected sediments were taken and the direct influence of the sea water on the sediments have impact on the chemical composition of beach sediments and their food quality for the inhabiting psammon. The conducted tests disclose that there is more organic matter and its labile forms in the sediments originating from Ustka. Strong anthropogenic pressure found at the beach in Ustka also contributes to higher concentration of uncharacterized fraction of organic carbon in the area. Analyzing alimentary usefulness of the organic matter there, it seems to be higher at the beach in Czołpino.

19

An attempt to assess the impact of anthropopressure on the ecological state of urbanised watercourses of Krakow conurbation and the difficulties encountered

86%

Wardas M., Aleksander-Kwaterczak U., Jusik S., Hryc B., Zgola T., Sztuka M., Kaczmarska M., Mazurek M.

Journal of Elementology

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2010

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tom 15

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nr 4

725-743

Rivers and streams in cities are treated as urbanised watercourses because of their significant transformation. Their load, channeling and incorporation into the water-sewerage infrastructure are often so considerable that such watercourses can hardly be recognised as an intrinsic component of surface waters. Anthropopressure, as reflected in quantitative and qualitative degradation caused by flow regulation and economic development in the drainage basin area, makes evaluation of the impact of human activity on the aquatic environment somewhat difficult. Based on the recommendations of the Water Framework Directive, an attempt has been made to assess the ecological state of selected tributaries of the Prądnik-Białucha River within the Krakow Conurbation. Aquatic environment sampling of the Sudół Dominikański (Rozrywka) watercourse was performed (September 2005) in order to determine some physicochemical, chemical and biological parameters, paying particular attention to macrophytes. The parameters measured on site: pH, electrolytic conductivity and Eh of water and bottom sediments, and sozological observations, were subjected to analysis. In the laboratory, concentrations of heavy metals, both in water and in solid particles (sediments and suspended matter) and anions in water were determined. The environmental state of the Sudół Dominikański watercourse was compared with that in the area of the Prądnik-Białucha River valley, for which an assessment had been conducted in the previous year (September 2004).

20

Determination of sediment delivery ratio in draining systems

86%

Michalec B.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2018

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tom 17

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nr 4

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