bluuebunny/crossref_metadata_2025_split huggingface dataset:
Morphometry changes of Lake Ostrowskie (the Gniezno Lakeland) on the basis of cartographic, remote sensing and geodetic surveying
Authors: Kunz Mieczysław , Skowron Rajmund , Skowroński Szymon 
Published: April 2011

Morphometry changes of Lake Ostrowskie (the Gniezno Lakeland) on the basis of cartographic, remote sensing and geodetic surveying
The authors studied changes in the morphometry of Lake Ostrowskie over the period of 123 years on the grounds of cartographic materials, remote sensing data, land surveying, and data referring to the water stages. The changes that occurred in the lake up to the 1960s were related to the regulation and melioration works conducted in the entire area of the Gniezno Lakeland. On the other hand, drainage of the open pits of brown coal resulted in the considerable decline of the water table by another 2.5 m in the years 2002-2009. As a result of the decline of water down to 96.4 m a.s.l. the present lake was divided into two water bodies (the eastern one and the western one) joint with a channel. This led to the decline in the lake area from 346.7 ha in 1887 to 242.0 ha, and its volume by 28.9%, out of which by 18.3% only in recent twenty-eight years.
Differentiation of concentration level of iron compounds in water reservoirs in subsidence depressions in the Katowice Upland
Authors: Machowski Robert 
Published: April 2011

Differentiation of concentration level of iron compounds in water reservoirs in subsidence depressions in the Katowice Upland
The aim of investigations was to evaluate the influence of varied anthropopression on the concentration of iron compounds in water reservoirs located in subsidence depressions treated as geosystems. Investigations were carried out during period of three hydrological years 2003-2005 within 10 reservoirs located in the Katowice Upland. The presence of iron was systematically measured in water and one time in bottom deposits. Measurements in taken samples were made by means of spectrometer of atomic absorption SOLAAR M6. Results confirmed varied influence of anthropopression on concentration of iron compounds in described reservoirs. It refers to waters and bottom deposits as well. Large differences between reservoirs occurred in a case of iron concentration in bottom deposits. The smallest amounts of it (3.10 g kg-1) were stated in transfer (flow-through) reservoir in Sosnowiec. Maximum values occurred also in reservoir in Sosnowiec, and the level of iron concentration in its deposits amounted to 44.28 g kg-1. Waters were also characterized by varied level of iron concentration. The lowest average values (0.0437 mg Fe l-1) were typical for one of reservoirs in Sosnowiec, whereas the maximum average iron concentration in amount of 0.4331 mg Fe l-1 referred to one of reservoirs in Zabrze. In the described reservoirs dynamic temporal changes in iron concentration in limnic waters was also stated. In every reservoir periods of complete disappearance of this metal occurred, whereas the maximum amounts of it in particular objects changed from 0.1132 mg Fe l-1 in reservoir in the borderland of Bytom and Chorzów up to 1.3744 mg Fe l-1 in reservoir located in Zabrze. The presence of iron compounds in the described water reservoirs on the one hand is shaped by environmental conditions, but on the other hand varied influence of anthropopression decides significantly of their spatial and temporal cycle in the nature.
Circulation of biogenic substances in the Kamionka river-lake system
Authors: Maślanka Wojciech , Jańczak Jerzy 
Published: April 2011

Circulation of biogenic substances in the Kamionka river-lake system
Reservoirs in river-lake systems play a dominant role in the circulation of biogenic substances. Their evolutional transformations, consisting in accumulation of substances, results it their ultimate disappearance. However, at a given moment, the roles played by reservoirs are far more diverse - they accumulate, perform a transit role or supply the system with biogenic substances. The assignment of roles played in the system to reservoirs performed on the basis of data of 2006 was verified in 2007 with respect to the durability of their roles. Some of the lakes consistently accumulated biogenic substances. Their performing of this function in the system was facilitated by favourable morphometric conditions accompanied by strong pressure, exceeding the value determined for critical load. A tendency of supplying the system by other lakes was visible when they were charged with a lower load than the critical values for phosphorus load. The reservoirs then utilised the opportunity to discharge a part of biogenic substance present in them, partially of internal origin.
Assessment of the ecological state of lakes as proposed by the Polish Limnological Society
Authors: Bajkiewicz-Grabowska Elżbieta 
Published: April 2011

Assessment of the ecological state of lakes as proposed by the Polish Limnological SocietyThe paper presents a method of assessment of the ecological state of lakes. It is based on methodology proposed by the Polish Limnological Society. According to this methodology, a set of indicators may be determined and may serve as a basis to make recommendations on what actions should be taken to maintain or restore a good ecological state of a lake. The set of indicators used for remedy recommendations includes: environmental pressure indicators that determine the rate of eutrophication in bodies of water, indicators of the state of the environment describing water quality and the balance of the water resources of a lake, and reaction indicators providing information on the degree of eutrophication of a lake.
Spatial variation of basin supply as a factor of water quality in a shallow, flow-through lake
Authors: Ferencz Beata , Dawidek Jarosław 
Published: April 2011

Spatial variation of basin supply as a factor of water quality in a shallow, flow-through lakeLake Syczyńskie is a water body that represents a group of the smallest Łęczna-Włodawa Lakes. The lake is supplied with waters from the four streams, while the outlet from the lake is directed into the Świnka River. The residence time of water is very short in Lake Syczyńskie. A role and variation of water supply from the catchment area were calculated using the mean seasonal loads transported from lakes sub-basins. A range of ionic migration into the basin of the lake was presented by means of daily and five-day radiuses. Among all inflows, C2 and C4 streams that drained Chełm Hills structure, were the most stable ones. The C3 stream that drained lake vicinity, was less important in shaping the quality of the lake water, while stream C1 was the one with a wide range of seasonal loads inconstancy. The highest fluviodynamic and matter transport occurred during the cold season. However, during the warm season in-lake processes were significant in terms of shaping the quality of lake water.
Soil transformations in catchment of disappearing Sumówko Lake (Brodnickie Lake District, Poland)
Authors: Gonet Sławomir , Markiewicz Maciej , Marszelewski Włodzimierz , Dziamski Andrzej 
Published: April 2011

Soil transformations in catchment of disappearing Sumówko Lake (Brodnickie Lake District, Poland)
Lake disappearing is a natural process which contemporarily escalates in consequence of human activity. It is estimated that within the area of Northern Poland from the last glaciation period (ca. 17 000 years ago) a half of lakes totally have disappeared. Areas exposed after water basins desiccation have become native rocks for new soils. Reduced water level results in changes of morphology and properties of the soils situated in direct vicinity of former water basins. The aim of this study was to estimate impact of the catchment groundwater level fall on morphology and properties of direct lake catchment soils, exemplified by the lake Sumowko (Northern Poland) as well as description of new soils formed of lake sediments. The analysis covered 11 soil profiles emerging within former lake basin (newly formed soils) and soils from direct vicinity of former lake (modified through ground water level fall). Obtained results prove that newly formed soils (Limnic Histosol Drainic and Haplic Gleysol) in majority are utilized as grasslands. Soils of the former lake surroundings prove relic features of gleying while they are also subject to mucking process because of dehydration.
Total phosphorus and organic matter content in bottom sediments of lake under restoration measures with iron treatment
Authors: Kowalczewska-Madura Katarzyna , Dondajewska Renata , Gołdyn Ryszard 
Published: April 2011

Total phosphorus and organic matter content in bottom sediments of lake under restoration measures with iron treatmentRusałka Lake is a shallow, man-made, strongly eutrophicated reservoir, being a place of recreational activities for Poznan citizens. Restoration measures with the use of iron sulphate were conducted in years 2006-2007. Phosphorus and organic matter concentrations in lake sediments were analyzed in years 2005-2007 at two research stations (profundal and littoral) to determine its changes under the influence of restoration. Greater phosphorus concentrations were noted in profundal (max 1.55 mg P g-1dry weight (DW)) than in littoral (max 0.98 mg P g-1DW). An increase of P amount in sediment was observed after iron treatment. Among phosphorus fractions Res-P dominated, i.e. phosphorus biologically unavailable for organisms. Organic matter content reached 23.1% in profundal, while 14.8% in littoral. Its amount decreased in following years.
Overgrowing of two polymictic lakes in Central-Western Poland
Authors: Ławniczak Agnieszka 
Published: April 2011

Overgrowing of two polymictic lakes in Central-Western PolandThis study examined the overgrowth in two eutrophic lakes during the period 1961-2008. In addition, for comparative studies, analyses of plant community structures in these lakes were performed to assess the effects of human pressure, such as water level reduction and increase of nutrient availability on changes in the range of the littoral zone surface. To achieve these aims aerial photos, ortophotmaps, GPS measurements were used to evaluate changes in plant cover in two lakes: Niepruszewskie and Tomickie. Considerable differences between the studied lakes located in an agricultural catchment were observed. Lake Niepruszewskie was characterised by a threefold higher rate of overgrowing, measured per hectare, in comparison with Lake Tomickie. Moreover, in comparison with lake areas, rates of overgrowing were substantialy higher in Lake Tomickie than Lake Niepruszewskie, which is almost seven times bigger. The littoral zones of both lakes are dominated by emergent vegetation. Compared to the data from 1961, the zone of Lake Niepruszewskie increased almost threefold. The biggest changes in overgrowing were observed after reduction of water level (>2002) which was 1.30 ha yr-1. During almost 50 years, emergent vegetation in Lake Tomickie increased more than fivefold. The most intensive growth was observed in years from 1961 to 1986, which amounted to 0.73 ha yr-1. Probably, water level reductions in Lake Niepruszewskie and high eutrophication in Lake Tomickie were recognised as major factors causing intensive overgrowing in the studied lakes.
Significance of reference observation in the evaluation of Secchi disk visibility on the example of lakes in the vicinity of Ełk
Authors: Maślanka Wojciech 
Published: April 2011

Significance of reference observation in the evaluation of Secchi disk visibility on the example of lakes in the vicinity of Ełk
The method of measuring transparency of water environments using the Secchi disc is still applied, despite a certain level of subjectivity of obtained results. At present, it should be used as a supplement to more reliable methods of measuring the thickness of the euphotic zone. A serious drawback is the low informative value of isolated measurements of the transparency of water environments, representing different stages of cyclic annual variability. This is also confirmed by the summer visibility measurements in the waters of lakes near Ełk of 2003 and 2005. Reservoirs investigated twice were sometimes characterised by a significant diversity of the observed absolute values of the Secchi disc visibility in particular years. However, treating them as benchmark reservoirs makes it possible to determine relative relationships of optical properties among water environments of all the 21 lakes analysed then. They can be expressed in the form of an ordered sequence of reservoirs with increasingly better optical properties of water environments. The ordered sequence was verified on the basis of the research results of 2006. The observed stability of the position of the benchmark reservoirs with respect to each other makes it possible to abandon treating the observed isolated values of the Secchi disc visibility in other reservoirs as, out of necessity, representative ones of the investigated lakes. The knowledge of the values of scopes of the disc visibility in the waters of the benchmark lakes makes it possible to precisely estimate, against them, this value in less frequently investigated lakes.
Oxygen conditions and trophic state of Lake Głębokie (Szczecin, Poland) in the years 2008-2010
Authors: Nędzarek Arkadiusz , Tórz Agnieszka , Kubiak Jacek 
Published: April 2011

Oxygen conditions and trophic state of Lake Głębokie (Szczecin, Poland) in the years 2008-2010The research in Lake Głębokie was conducted in the years 2008-2010. Sampling from three selected sites was designed in such a way that vertical profiles of the characteristics of interest were obtained. Measurements were performed to determine the content of dissolved oxygen, oxygen saturation expressed as a percentage, water temperature, total phosphorus, chlorophyll a, dry seston mass, and Secchi disk depth. During the course of a year, water temperature varied from 0.58°C to 24.72°C. However, a permanent thermal stratification was not observed in the summer season due to complete water mixing. Dissolved oxygen concentrations in the water varied within a range that started at hard-to-measure insignificant values and reached up to 9.63 mg O2 l-1, while oxygen saturation reached a maximum of 116% O2. At the same time, it was observed that oxygen conditions gradually worsened as the depth became greater. The largest oxygen deficits occurred in the winter season of 2009-2010. The oxygen conditions were typical for an eutrophic lake. Its high trophic state was confirmed by an analysis performed using the method proposed by Carlson (1977) as well as by an analysis performed according to the directives of the OECD (1982). The trophic state of this lake is borderline eutrophic and hypertrophic. The oxygen conditions found in this lake ought to be seen as not beneficial to fish.
The Rise of the Total Abstinence Model. Recommendations Regarding Alcohol Use During Pregnancy in Finland and Denmark
Authors: Leppo Anna , Hecksher Dorte 
Published: April 2011

AIMS Adverse effects of alcohol on the fetus are currently defined as a serious public health problem in all western countries. Exposure of the fetus to alcohol may result in a spectrum of adverse effects, referred to collectively as fetal alcohol spectrum disorders (FASD). Different countries vary in terms of policy regarding alcohol consumption during pregnancy. This paper sets out to examine and compare official recommendations on alcohol intake during pregnancy in Finland and Denmark since the 1970s. In addition, the paper analyses the rationale behind these recommendations. Methods and Data The method used is qualitative content analysis. The data consists of 1) health education material for pregnant women and 2) reports and guidelines produced by government health authorities. The data comes from Finland and Denmark and covers the period between the 1970's and today. Results The article demonstrates how the official Finnish and Danish recommendations regarding alcohol intake during pregnancy have in the last decades fluctuated between a more permissive and a total abstinence approach. Both countries have recently adopted a total abstinence message. This policy line is not, however, based on research evidence pertaining to the harmfulness of a small-to-moderate alcohol intake during pregnancy but rather on the principle of precaution. The Finnish data contains very little information about the background of the changing recommendations whereas the Danish trajectories are explained in policy documents and expert debates. The paper suggests that the recent adoption of a total abstinence message in Finland and Denmark is closely linked to a change in the social and cultural climate regarding FASD. Moreover, it is argued that the adoption of the total abstinence model in Finland and Denmark is part of a wider international trend. Conclusions The knowledge gap with regards to the fetal effect of low-to-moderate levels of alcohol consumption combined with an urge to protect the fetus makes the formulation of health education messages complicated. The paper discusses problematic features in the current Finnish and Danish policy arguing that the recommendations to pregnant women contain contradictory elements. Future research should focus on women's and health professionals’ risk perceptions and international trends with regards to the total abstinence model.
Implementation of Substitution Treatment in Finland: Beyond Rationalisation and Medicalisation
Authors: Selin Jani 
Published: April 2011

AIMS Finnish treatment of drug abuse has during the last two decades shifted from a predominantly psychosocial approach to a more medical mode. This is especially evident in the rapid implementation of substitution treatments (STs). My aim is to show that labelling this development as ‘medicalisation’ or ‘rationalisation’ as a form of medical progress will not increase our understanding of the change. MATERIAL AND DESIGN I analysed texts from several periodicals with psychosocial, social policy and medical perspectives between 1997 and 2005. Four basic conceptual and argumentative underpinnings emerged which gave credence to the medical and rationalapproach, and the validity of these four elements was then investigated. I also collected all the texts on drug addiction and its treatment from two medical journals in 1965–1976 to examine the way in which drug addiction was conceptualised during this earlier phase. Results The material shows that there are at least four reasons why medicalisation and rationalisation cannot explain the implementation of substitution treatments in Finland. First, progress in medical research on addiction did not make STs necessary. Second, the effectiveness of substitution treatments hinges on a particular kind of scientific rationality that cannot be equated with rationality per se. Third, it was not the 1990s and 2000s that drug addiction was coded as a medical problem for the first time. Fourth, it is difficult to include into the medicalisation theory how people actively want to be ‘medicalised’. Medical knowledge and technology open up new domains of knowledge with possible relations to practices of power and offer people new ways of self-understanding. How these different practices work is a question of empirical research. Both ‘rationalisation’ and ‘medicalisation’ are concepts often used in an inflationary way, and this may make them insensitive as analytical instruments.
The Effects of Missing Data When Surveying Alcohol Habits
Authors: Wennberg Peter , Svensson Johan , Ramstedt Mats 
Published: April 2011

AIMS This study aimed at describing the effects of missing data when surveying alcohol consumption using a Random Digit Dialling procedure. Methods Data was part of the Monitor project including repeated monthly data on the alcohol habits in the general Swedish population. Non-respondents during four months were followed up a year later and asked to do a shortened telephone interview and were compared to a concurrent sample of respondents (n=2552 versus n=6005). Further, using a second approach, the monthly levels of non-response was related to the level of measured alcohol use in a time series analysis (n=67500). Results The results indicated no differences in the level of reported alcohol or tobacco use with except for a slightly higher proportion of alcohol abstainers in the sample of initial non-response. The time series showed no pattern of co-variation between the obtained non-response levels and the assessed levels of alcohol or tobacco use. Conclusions On the basis of the results it was meaningful to make a distinction between “soft” non-respondents (responding after extensive contacting effort) and “hard” non-respondents (not responding albeit extensive effort) and the results suggest that inclusion of the “soft” non-respondents does not by necessity lead to higher levels of assessed alcohol use.
Periphyllus californiensis Shinji, 1917 (Hemiptera: Aphidoidea) - an invasive aphid species new to Poland
Authors: Junkiert Łukasz , Wieczorek Karina , Wojciechowski Wacław 
Published: April 2011

Periphyllus californiensis Shinji, 1917 (Hemiptera: Aphidoidea) - an invasive aphid species new to Poland
Periphyllus californiensis Shinji, 1917, an aphid species associated with Acer palmatum and A. japonicum, was recorded in the Botanic Garden of the Jagiellonian University, Kraków, in 2009 and 2010. This invasive species, new to Poland, is presented (apterous viviparous female, alate viviparous female) and described in detail. A key to the Polish species of the genus Periphyllus van der Hoeven, 1863 is provided.
The first records of the Nearctic treehopper Stictocephala bisonia in Poland (Hemiptera: Cicadomorpha: Membracidae) with some comments on this potential pest
Authors: Świerczewski Dariusz , Stroiński Adam 
Published: April 2011

The first records of the Nearctic treehopper Stictocephala bisonia in Poland (Hemiptera: Cicadomorpha: Membracidae) with some comments on this potential pest
Stictocephala bisonia Kopp et Yonke, 1977 has been recorded for the first time in three localities in Poland. This is a Nearctic species introduced into Europe at the beginning of the 20th century and has expanded its range ever since. We briefly characterize this new treehopper and provide a key to the identification of the Polish species of Membracidae.