scholarly journals Microplastics in freshwater fish from Central European lowland river (Widawa R., SW Poland)

2020 ◽  
Vol 27 (10) ◽  
pp. 11438-11442 ◽  
Author(s):  
Natalia Kuśmierek ◽  
Marcin Popiołek
Keyword(s):  
Freshwater Fish ◽  
Lowland River ◽  
Central European ◽  
Sw Poland

Performance of a pool-and-weir fish pass for small bottom-dwelling freshwater fish species in a regulated lowland river

2007 ◽  
Vol 57 (4) ◽  
pp. 423-432 ◽  
Author(s):  
Evelien Maerten ◽  
Marcel Eens ◽  
Guy Knaepkens
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Assemblages ◽  
Regulated River ◽  
Lowland River ◽  
Stone Loach ◽  
Spined Loach ◽  
Freshwater Fish Species ◽  
Cottus Gobio ◽  
Fish Pass

AbstractAlthough small benthic freshwater fish species are an important biological component of fish assemblages and free instream movement is indispensable for their survival, they are often neglected in fish pass performance studies. In this study, a capture-mark-recapture approach was used to assess whether small bottom-dwelling species, including gudgeon (Gobio gobio), stone loach (Barbatula barbatula), spined loach (Cobitis taenia) and bullhead (Cottus gobio), were able to cross a pool-and-weir fish pass in a regulated lowland river. Some tagged individuals of stone loach (18%), gudgeon (7%) and spined loach (2%) managed to successfully ascend the fish pass under study, despite the fact that water velocity levels in the different overflows of the facility (between 0.55-1.22 m/s) exceeded the critical swimming speed of all three species. Although this suggests that a pool-and-weir fish pass is a able to facilitate upstream movement of some small benthic species in a regulated river, more detailed research incorporating advanced tagging and retrieving techniques is necessary.

scholarly journals Influence of 200 years of water resource management on a typical central European river Does industrialization straighten a river?

2021 ◽  
Author(s):  
Stefanie Sabine Wolf ◽  
Verena Esser ◽  
Holger Schüttrumpf ◽  
Frank Lehmkuhl
Keyword(s):  
Industrial Development ◽  
Water Resource Management ◽  
Power Plants ◽  
Large Scale ◽  
Developed Countries ◽  
Water Withdrawal ◽  
Lowland River ◽  
Running Water ◽  
Central European ◽  
Time Periods

Abstract Background Over the last 200 years, the courses of most European rivers have experienced significant irreversible changes. These changes are connected to different kinds of anthropogenic river use and exploitation, which have varied from running water mills and rafting to large-scale hydroelectric power plants, industrial water withdrawal and flood protection measures. Today, in most developed countries, water quality and ecological river development are important factors in water management. The aim of this study is to evaluate the specific impacts of different time periods during the last 200 years on river courses and their effects on current river management using the example of the 165 km-long German Rur River (North Rhine-Westphalia). The Rur River is a typical central European upland to lowland river whose catchment has been affected by various phases of industrial development.MethodsIn this study, a range of morphological changes over the last 200 years are determined based on historic maps and up-to-date orthophotos. River length, sinuosity, oxbow structures, sidearms and the number of islands are used to investigate human impact. The results are correlated with historic time periods.ResultsThis analysis shows that river straightening increases, especially during the Industrial Revolution, even without direct hydraulic channelization. The period and grade of river straightening have a direct morphodynamic impact on today’s river restorations. Since the Rur River is a typical upland to lowland river, the results show an additional impact by geofactors, such as landform configurations.ConclusionsMorphodynamic development is correlated with five historic periods of industrial development between 1801 and 2019 up to the introduction of the EU - Water Framework Directive (EU-WFD). Each period shows a different influence on the watercourse, which is connected with human intervention. Even if worldwide comparisons show that the five historical phases differ slightly in their timing between regions, they are applicable to other study areas.

Multiple Archaean to Early Palaeozoic events of the northern Gondwana margin witnessed by detrital zircons from the Radzimowice Slates, Kaczawa Complex (Central European Variscides)

2007 ◽  
Vol 145 (1) ◽  
pp. 85-93 ◽  
Author(s):  
RAFAŁ TYSZKA ◽  
RYSZARD KRYZA ◽  
JAN A. ZALASIEWICZ ◽  
ALEXANDER N. LARIONOV
Keyword(s):  
North Africa ◽  
Detrital Zircons ◽  
Central European ◽  
Late Cambrian ◽  
Gondwana Margin ◽  
Sw Poland ◽  
Depositional Age ◽  
Ordovician Magmatism ◽  
Early Palaeozoic ◽  
European Variscides

AbstractSIMS dating of detrital zircons from the stratigraphically enigmatic Radzimowice Slates of the Kaczawa Mountains (Sudetes, SW Poland), near the eastern termination of the European Variscides, has yielded age populations of: (1) 493–512 Ma, corresponding to late Cambrian to early Ordovician magmatism and constraining a maximum depositional age; (2) between 550 and 650 Ma, reflecting input from diverse Cadomian sources; and (3) older inherited components ranging to c. 3.3 Ga, with age spectra similar to those from Gondwanan North Africa. The new data show that the Radzimowice Slates cannot form a Proterozoic base to the Kaczawa Mountains succession, as suggested by earlier models, but was deposited, at the earliest, as an extensional basin-fill, during a relatively late stage of the break-up of this part of northern Gondwana.

Assessment of the movement behaviour of the bullhead (Cottus gobio), an endangered European freshwater fish

2005 ◽  
Vol 55 (3) ◽  
pp. 219-226 ◽  
Author(s):  
◽  
◽  
Keyword(s):  
Freshwater Fish ◽  
Lowland River ◽  
Economic Interest ◽  
Movement Behaviour ◽  
Seasonal Differences ◽  
Cottus Gobio ◽  
Conflicting Information ◽  
Wide Range ◽  
Physical Barriers ◽  
The Impact

AbstractDespite the increasing recognition that in-stream movement probably represents an important aspect of the ecology of many stream fish populations, there is still limited and often conflicting information on the movement behaviour of a wide range of fish, especially species that are threatened and/or with no economic interest. In this study, movement behaviour of the endangered bullhead (Cottus gobio), a small, bottom-dwelling European freshwater fish, was assessed by mark-recapture in a Flemish (northern part of Belgium) lowland river between September 2002 and May 2003. The majority (61-72%) of tagged bullheads recaptured during the different sampling occasions were found at or near (< 10 m) their initial tagging site. The other re-sighted specimens however had covered distances between 20 and 270 m. There were no significant indications of seasonal differences in bullhead movement behaviour. In general, our results strongly suggest that bullhead populations not only consist of stationary individuals but also of relatively mobile fish. Consequently, to effectively conserve this endangered species, fisheries managers should (i) consider sufficiently large areas of habitat as critical to bullhead populations, and (ii) minimise the impact of physical barriers on bullhead movement.

scholarly journals Influence of 200 years of water resource management on a typical central European river. Does industrialization straighten a river?

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Stefanie Wolf ◽  
Verena Esser ◽  
Holger Schüttrumpf ◽  
Frank Lehmkuhl
Keyword(s):  
Industrial Development ◽  
Water Resource Management ◽  
Power Plants ◽  
Large Scale ◽  
Developed Countries ◽  
Water Withdrawal ◽  
Lowland River ◽  
Running Water ◽  
Central European ◽  
Time Periods

Abstract Background Over the last 200 years, the courses of most European rivers have experienced significant irreversible changes. These changes are connected to different kinds of anthropogenic river use and exploitation, which have varied from running water mills and rafting to large-scale hydroelectric power plants, industrial water withdrawal and flood protection measures. Today, in most developed countries, water quality and ecological river development are important factors in water management. The aim of this study is to evaluate the specific impacts of different time periods during the last 200 years on river courses and their effects on current river management using the example of the 165-km-long German Rur River (North Rhine-Westphalia). The Rur River is a typical central European upland-to-lowland river whose catchment has been affected by various phases of industrial development. Methods In this study, a range of morphological changes over the last 200 years are determined based on historic maps and up-to-date orthophotos. River length, sinuosity, oxbow structures, sidearms and the number of islands are used to investigate human impact. The results are correlated with historic time periods. Results This analysis shows that river straightening increases, especially during the Industrial Revolution, even without direct hydraulic channelization. The period and grade of river straightening have a direct morphodynamic impact on today’s river restorations. Since the Rur River is a typical upland-to-lowland river, the results show an additional impact by geofactors, such as landform configurations. Conclusions Morphodynamic development is correlated with five historic periods of industrial development between 1801 and 2019 up to the introduction of the EU—Water Framework Directive (EU-WFD). Each period shows a different influence on the watercourse, which is connected with human intervention. Even if worldwide comparisons show that the five historical phases differ slightly in their timing between regions, they are applicable to other study areas.

Earthen mounds in the Głubczyce Forest (SW Poland) – are they prehistoric long-barrows? Geoarchaeology of the Silesian soil record and human-environment interplay in the Holocene

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mateusz Krupski ◽  
Maksym Mackiewicz ◽  
Cezary Kabała ◽  
Maciej Ehlert ◽  
Marzena Cendrowska
Keyword(s):  
Anthropogenic Activity ◽  
Vegetation Changes ◽  
Funerary Practices ◽  
Human Environment ◽  
Central European ◽  
Loess Area ◽  
Ancient Agriculture ◽  
Human Management ◽  
Sw Poland ◽  
Funnel Beaker Culture

Abstract Two earthen mounds, trapezoid in shape, oriented along the W-E/NW-SE axis and located in prominent landscape positions, were recently discovered in the Głubczyce Forest in the loess area of the Głubczyce Plateau (SW Poland). Their resemblance to long-barrows of the Funnel Beaker culture, as yet unknown in this part of Silesia prompted low-invasive research, involving ALS data analysis, magnetic prospection and a study of soil properties. The objective was to determine if these are indeed anthropogenic structures and if so, how and when were they built. The results indicate: 1) a transformation from chernozemic (Phaeozem) to clay-illuvial soil (Luvisol/Retisol) in the Głubczyce Forest area. Similar processes were identified in neighbouring Central European loess regions and linked with prehistoric climate/vegetation changes (the spread of dense, beech-dominant forests). Human management of the landscape (involving sustained deforestation), enabled the patchy preservation of chernozemic soils until the present-day, 2) both mounds are anthropogenic features, built on a Phaeozem using chernozemic soil. Their construction occurred before the soil transformation, i.e. most likely in prehistory. The development of the Głubczyce Forest may have taken place during the Migration period – a time of settlement decline in Silesia, and 3) the Głubczyce Forest bears further traces of anthropogenic activity: ancient agriculture (field systems), funerary practices, forest management and WWII combat.

scholarly journals Month-to-Month Variations in Densities and Dominance of Birds Breeding in an Extensive Pine Forest

2017 ◽  
Vol 51 (1) ◽  
pp. 53-60 ◽  
Author(s):  
G. Kopij
Keyword(s):  
Forest Type ◽  
Diversity Index ◽  
Coniferous Forest ◽  
Line Transect ◽  
Population Densities ◽  
Bird Population ◽  
Central European ◽  
Sw Poland ◽  
Shannon’S Diversity Index ◽  
Forest Habitats

Abstract Month-to-month changes in avian assembages are considerable in forest habitats. In this study such changes were studied by means of the line transect method (eight transect with total length of 77.7 km) in lowland coniferous forest in SW Poland (dominant forest type in Central European Plain), in three consecutive spring months: April, May and June. Shannon’s diversity index varied between 1.31 and 2.25 in particular month, while Simpson’s diversity index and Pielou’s evenness index were almost identical everywhere: H′ = 0.92-0.93 and J′ = 0.74-0.78, respectively. In overall, the differences in mean densities of breeding species between three months on all transects pooled were not statistically significant, as were also not statistically significant such differences on particular transects. Month-to-month variations in densities in all transects pooled were statistically significant in the case of 26 out of 54 species (48.1 %). Month-to-month changes in population densities recorded on transects, only partly conform to the arrival patterns. Two counts, instead of three, would sufficed for precise estimation of bird population densities in Central European lowland pine forests: one count should be conducted in April, to register mainly resident species, and the second one in May to count mainly the migrant species.

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