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Factors regulating the compositions and distributions of dissolved organic matter in the estuaries of Jiaozhou Bay in North China

100%

Hu J., Zou L., Wang J., Ren Q., Xia B., Yu G.

Oceanologia

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2020

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tom 62

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nr 1

2

Effect of drag coefficient formula choice on wind stress climatology in the North Atlantic and the European Arctic

100%

Wrobel-Niedzwiecka I., Drozdowska V., Piskozub J.

Oceanologia

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2019

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tom 61

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nr 3

3

Characteristic properties of bottom backscattering in the southern Baltic Sea at ultrasound frequencies

100%

Klusek Z., Tegowski J., Szczucka J., Sliwinski A.

Oceanologia

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1994

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tom 36

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nr 1

4

Budgets of elements in a lowland forested watershed: the comparison of watershed with and without the stream

100%

Kruk M.

Polish Journal of Ecology

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1999

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tom 47

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nr 3

5

Ecohydrodynamic model of the Baltic Sea. Part 1. Description of the ProDeMo model

100%

Oldakowski B., Kowalewski M., Jedrasik J., Szymelfenig M.

Oceanologia

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2005

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tom 47

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nr 4

The ProDeMo (Production and Destruction of Organic Matter Model), a 3D coupled hydrodynamic-ecological model, was formulated and applied to the whole Baltic Sea and the subregion of the Gulf of Gdańsk. It describes nutrient cycles (phosphorus, nitrogen, silicon) through the food web with 15 state variables, oxygen conditions and the parameterisation of water-sediment interactions. The present version of the model takes two groups of phytoplankton – diatoms and non-diatoms – as well as zooplankton into consideration. It covers the flow of matter and energy in the sea, including river discharges and atmospheric deposition. Numerical applications are embedded on a 1 NMgri d for the Gulf of Gdańsk and a 5 NMgri d for the Baltic Sea. Since the model results largely concur with observations, the model can be regarded as a reliable tool for analysing the behaviour of the Baltic ecosystem. Some examples of the spatial-temporal variability of the most important biological and chemical parameters are presented. The model results are compared with those of other modelling research in the Baltic Sea. Both the ProDeMo model algorithm and its computing procedures need to be further developed. The next version should therefore enable more phytoplankton groups to be defined, for example cyanobacteria, which are able to take up molecular nitrogen from the atmosphere (nitrogen fixation). Additionally, the sediment phase should be divided into active and non-active layers.

6

Experiments on wave motion and suspended sediment concentration at Nang Hai, Can Gio mangrove forest, Southern Vietnam

100%

Hong Phuoc V. L., Massel S. R.

Oceanologia

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2006

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tom 48

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nr 1

Biogeochemical and trophodynamic processes as well as hydrodynamic factors play a major role in the structure and function of mangrove ecosystems. This study outlines field experiments on wave motion and suspended sediment concentration carried out at Nang Hai, Can Gio mangrove forest, Southern Vietnam. Pressure sensors were used to measure sea surface elevation, and Optical Backscatter Sensors (OBS) were applied to detect infrared (IR) radiation scattered from suspended particles in order to measure turbidity and suspended sediment concentrations. The experimental results indicate that most of the energy is dissipated inside the mangrove forest as a result of wave-trunk interactions and wave breaking. The suspended sediment concentration depends on wave intensity and tidal current velocity. Wave action is one of the main factors forcing sediment transport and coastal erosion at the study site; even the wave field at the study site is not so strong. The establishment of mangrove vegetation can encourage the deposition of sediment, or at least the retention of the flood-tide sediment influx.

7

Genetic diversity in relation to secondary succession of forest tree communities

80%

Wehenkel C., Corral-Rivas J. J., Hernandez-Diaz J. C.

Polish Journal of Ecology

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2011

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tom 59

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nr 1

Forest succession is a fundamental ecological process, which has significant implications for the biological, biophysical, and biogeochemical processes in an ecosystem. Genetic diversity is not only a product of the number of species present in a given area, but also of successional change from colonization of gaps by pioneer species to mature climax forest. Genetic diversity should be higher in earlier successional stages than in later stages because high environmental predictability in later successional stages favours low genetic diversity. In the present study the relationship between secondary succession and genetic diversity was explored in eight stands of characteristic tree communities in the Thuringian forest area (Germany). Each of the eight stands was subdivided into six plots in a grid of 40 x 40 m to detect as much as possible tree species and genetic variants within the forest tree community and successionspecific structures. To define secondary succession, the mean Ellenberg indicator values for light and nitrogen in the herb layer, weighted for coverage, as well as the percentage of climax tree species in naturally regenerated stands were used. All species and genotype diversities based on the investigated tree species were calculated by the so-called Hill numbers. The results showed that the Gregorius´s Covariation (C) of secondary succession with the transspecific genotype diversity as well as the transspecific genotype diversity per species for the enzyme systems AAT, HEK, PGI, MDH, IDH as well as the AFLP trait was statistically significant in several relationships. The transspecific genotype diversities were often significantly greater in the earlier successional stages than in the later stages. Selection effects during replacement of light and nitrogen demanding species and plant communities by more economical and competitive species such as Abies alba Mill. and Fagus sylvatica L. probably dominated in the study. Based on the results of the study, we conclude that genetic diversity may be an essential attribute of stages of secondary succession that should be further explored because of its relation to adaptability and ecological stability.

8

Soluble forms of zinc in profiles of selected types of arable soils

80%

Domanska J.

Journal of Elementology

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2009

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tom 14

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nr 1

55-62

The research was carried out on arable soils of the region of Lublin. The aim of the study was to determine the content of Zn extractable in 1 M HCl⋅dm-3 in profiles of selected types of soils and the total content of Zn (measured in aqua regia) in soil samples from the accumulative layer 0-20 cm of the soils. The investigations included 8 morphological types of soils: Rendzic Leptosols (typical rendzinas), Rendzic Leptosols (humic rendzinas), Haplic Phaeozems, Calcaric Cambisols, Haplic Luvisols, Cambic Arenosols, Haplic Podzols, Eutri-Terric Histosols. The content of zinc (Zn) was measured by Atomic Absorption Spectrometry (AAS). In mineral soils the highest content of total Zn was found in rendzinas (48.0-55.8 mg⋅kg-1 DM) and the lowest one appeared in rusty soil and in podzolic soil – about 13 mg Zn⋅kg-1 each, at average 24.5 mg⋅kg-1. Average concentration of available forms of zinc was 5.2 mg Zn⋅kg-1. The amount of this element in soils was from 2.0 mg Zn⋅kg-1 in the level Cca of typical rendzinas to 17.0 mg Zn⋅kg-1 in the accumulative level of peat soil. In most profiles the highest concentration of soluble form of Zn was present in the accumulative layer and was usually decreasing deeper in the profile. The distribution of Zn in profiles was shaped by the biological accumulation of this element in the humus horizon and natural biogeochemical processes.

9

The eutrophication model of the Vistula Lagoon

70%

Kwiatkowski J., Rasmussen E. K., Ezhova E., Chubarenko B.

Oceanological Studies

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1997

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tom 26

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nr 1

Ograniczanie wyników

Factors regulating the compositions and distributions of dissolved organic matter in the estuaries of Jiaozhou Bay in North China

Effect of drag coefficient formula choice on wind stress climatology in the North Atlantic and the European Arctic

Characteristic properties of bottom backscattering in the southern Baltic Sea at ultrasound frequencies

Budgets of elements in a lowland forested watershed: the comparison of watershed with and without the stream

Ecohydrodynamic model of the Baltic Sea. Part 1. Description of the ProDeMo model

Experiments on wave motion and suspended sediment concentration at Nang Hai, Can Gio mangrove forest, Southern Vietnam

Genetic diversity in relation to secondary succession of forest tree communities

Soluble forms of zinc in profiles of selected types of arable soils

The eutrophication model of the Vistula Lagoon