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1

Global paleohydrological change

100%
Baker V. R.
Quaestiones Geographicae. Zeszyt Specjalny
|
1995
|
tom 04
2
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Content available

New image analysis method for the estimation of global and spatial changes in fruit microstructure

75%
Pieczywek P. M., Cybulska J., Dyki B., Konopacka D., Mieszczakowska-Frac M., Zdunek A.
International Agrophysics
|
2016
|
tom 30
|
nr 2
3
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Content available

The changing North Sea: knowledge, speculation and new challenges

75%
Sundermann J.
Oceanologia
|
2003
|
tom 45
|
nr 2
Synthesis and New Conception of North Sea Research (SYCON) is the title of a German project carried out from 1998–2000 under the leadership of Hamburg University1. It was accompanied by an international advisory board and covered North Sea issues as well as the general challenges to shelf sea research and sustainable management under global change. Particular emphasis was placed on the interdisciplinary analysis of comprehensive areas of knowledge: the data situation, understanding of processes, model development, instruments and methods, understanding of the system. Based on this, perspectives for future North Sea research were developed. The project produced a synthesis report, eleven monodisciplinary reports and an illustrated brochure for the general public (see Annex 1, this paper, p. 258).
4

Carbon isotope composition of plants along altitudinal gradient and its relationship to environmental factors on the Qinghai-Tibet Plateau

75%
Li M., Liu H., Li L., Yi X., Zhu X.
Polish Journal of Ecology
|
2007
|
tom 55
|
nr 1
Distribution pattern of δ¹³C values of plateau plants and their responses to environment along altitudinal gradients were investigated. In the growing season of 2003 (June– August), stable carbon isotope ratios (δ¹³C) of 174 plant samples belonging to 89 species of 20 families and 58 genera along the gradient 2800– 4400 m (above sea level) was studied in six sites on the east edge of Qinghai-Tibet Plateau. The results indicated that the range of δ¹³C values of plants is narrow from –30.2‰ to –25.2‰, which means that none of the species examined belonged to C₄ photosynthetic pathway and all of these species performed C₃ photosynthetic pathway. The average δ¹³C values of plants at 6 sites were positively correlated to altitude (r = 0.974, P <0.01). The results revealed that site-averaged δ¹³C values were negatively correlated with temperature (r = 0.907, P <0.05) as well as CO₂ partial pressure (r = 0.940, P <0.01). The combination of these two factors account for 80% of the variation of δ¹³C values (r² = 0.859, P <0.01). Varying precipitation with increasing altitude does not affect the plant δ¹³C values (r = 0.469, P> 0.05) as well as the sunlight duration(r = 0.630, P> 0.05).
5

Global environmental policy: the role for economic instruments

75%
Zylicz T.
Geographia Polonica
|
1995
|
tom 65
6

Long-term decrease of the vendace population in Lake Pluszne (Poland) - results of global warming, eutrophication or both?

63%
Godlewska M., Doroszczyk L., Dlugoszewski B., Kanigowska E., Pyka J.
International Journal of Ecohydrology and Hydrobiology
|
2014
|
tom 14
|
nr 1
7
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European alliance of global environmental change

63%
Papers on Global Change
|
2012
|
nr 19
8
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Total suspended particulate matter in the Porsanger fjord (Norway) in the summers of 2014 and 2015

63%
Bialogrodzka J., Stramska M., Ficek D., Wereszka M.
Oceanologia
|
2018
|
tom 60
|
nr 1
High-latitude fjords, very vulnerable to global change, are impacted by their land and ocean boundaries, and they may be influenced by terrestrial water discharges and oceanic water inputs into them. This may be reflected by temporal and spatial patterns in concentrations of biogeochemically important constituents. This paper analyses information relating to the total suspended matter (TSM) concentration in the Porsanger fjord (Porsangerfjorden), which is situated in the coastal waters of the Barents Sea. Water samples and a set of physical data (water temperature, salinity, inherent optical properties) were obtained during two field expeditions in the spring and summer of 2014 and 2015. Bio-optical relationships were derived from these measurements, enabling optical data to be interpreted in terms of TSM concentrations. The results revealed significant temporal variability of TSM concentration, which was strongly influenced by precipitation, terrestrial water discharge and tidal phase. Spatial distribution of TSM concentration was related to the bathymetry of the fjord, dividing this basin into three subregions. TSM concentrations ranged from 0.72 to 0.132 g m−3 at the surface (0–2 m) and from 0.5 to 0.67 g m−3 at 40 m depth. The average mineral fraction was estimated to be 44% at surface and 53% at 40 m.
9

Global freshwater resources for sustainable development

63%
Kundzewicz Z. W.
International Journal of Ecohydrology and Hydrobiology
|
2007
|
tom 07
|
nr 2
125-134
10
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Forests and rural development in the light of global change - a perspective of mountain forests

63%
Jandl R., Stohr D.
Folia Forestalia Polonica. Series A . Forestry
|
2009
|
tom 51
|
nr 1
Mountain forests are facing substantial changes. The need to adapt forest management to climate change is overlaid by the consequences of demographic changes that alter the form of land use profoundly. The European policy is aware of the challenges and supports mountain regions by the Regulation for Rural Developments and other strategies. Regional efforts of the Forest Authorities account for the changing ownership structure in order to ensure sustainable forest management and the provision of the dependent ecosystem services.
11

Ecohydrology - process oriented thinking for sustainability of river basins

63%
Zalewski M.
International Journal of Ecohydrology and Hydrobiology
|
2012
|
tom 12
|
nr 2
12

Hydrological processes in a catchment scale under global climate change

63%
Kaczmarek Z.
International Journal of Ecohydrology and Hydrobiology
|
2002
|
tom 02
|
nr 1-4
The following areas of research related to the climate\water resources interface may be identified: detecting changes in atmospheric and hydrological variables by means of measurable indicators, including paleohydrological data; assessing sensitivity of land surface processes to climate characteristics; analyzing implications of climate change on regional water supply and demand; assessing the impact of climate change on physical, chemical and biological processes in water bodies. There is a possibility of applying a range of approaches, from simple empirical relationships to complex conceptual models based on simplified representation of the processes involved in the hydrological cycle. There are still uncertainties propagated through the numerous levels of analysis as one moves from CO2 scenarios, through the transference of climatic data to hydrologic characteristics, impacts on water sectors and on management decisions and socioeconomic impacts of response measures. Climate/hydrology impact studies should allow answering questions important for decision making: e.g. is the water system able to fulfil required tasks for the current economic, climatic and hydrologic conditions? If not, what action should be taken to improve the situation? Will the system be able to meet requirements 20 to 50 years from now, assuming stationarity of hydrological processes? If not, what kind of measures must be foreseen to enhance system's ability to cope with water deficits and floods? To what extent a water resource system may be affected as a result of climate change? How to deal with uncertainties? What are the adaptation options? How the analysts should communicate with decision makers in order to demonstrate that there is a problem to be addressed? Based on the current knowledge, the following conclusions seem to be justified: there are reasons for decision makers to be concerned, because the water supply and demand may be affected by the climate change; water systems may be effectively adapted to changed climatic conditions; cost of adaptation in various regions of the country will vary depending on the depth of expected water deficits; the vulnerability of water systems to changes decrease as the level of water system development increase; improved demand management and institutional adaptation are primary components for increasing the robustness of water resources systems; a continuous adaptation of design criteria, development plans, operating rules and water allocation policies to the newly developed climate scenarios is needed.
13

4th IASC Council Meeting, Ilulissat, West Greenland, May 1994

63%
Birkenmajer K.
Polish Polar Research
|
1994
|
tom 15
|
nr 1-2
14

XXIII SCAR meeting, Rome, Italy, August-September 1994

63%
Birkenmajer K.
Polish Polar Research
|
1994
|
tom 15
|
nr 1-2
15

Combined effects of earthworms and diurnal temperature fluctuations on successional changes of litter nematode community

51%
Uvarov A. V., Kolosova N., Kulinich O.
Polish Journal of Ecology
|
2009
|
tom 57
|
nr 4
685-696
Earthworm functioning and temperature regime are among the most important biotic and abiotic factors of soil environment; their combined action on soil nematode activities has not been studied. In a 4-month laboratory experiment, effects of the epigeic earthworm Dendrobaena octaedra on a succession of nematode community in litter of a mid-European birch/oak forest were tested in the gradient of an increase of diurnal temperature fluctuations from 0℃ (constant 15℃; T₁₅) to 10℃ (daily range between 10° and 20℃; T₁₀₋₂₀) and 20℃ (daily range between 5° and 25℃; T₅₋₂₅). Earthworm and temperature effects were measured as differences in nematode community respiration rates between the experimental treatments. Nematode respiration rates were calculated on the basis of body size/weight/O₂ consumption relationships for individual species. Nematode community was dominated by bacterial feeders and changed in a characteristic successional pattern which, however, was markedly modified by temperature regime and earthworm activities. Dominant nematode taxa revealed specific patterns of temporal dynamics in connection with their responses to temperature and earthworm presence. Thus, metabolic activity of Plectus acuminatus was strongly reduced by D. octaedra but did not react to variation of temperature regime. In contrast, activity of Panagrolaimus sp. significantly responded to temperature but not to earthworm presence, whereas Pl. thornei reacted to both factors separately and in combination. Ceratoplectus armatus was stronger affected by earthworm presence then by temperature; Tylocephalus auriculatus showed the opposite pattern. The variety of responses may explain the coexistence of several taxonomically related (Plectidae) and trophically similar species within the dominant group. Both earthworm presence and increase of the range of diurnal temperature fluctuations strongly affected the net of interspecific correlations within the nematode community. Earthworms strongly reduced total activities of nematode community at any temperature regime. T₁₅ regime showed markedly lower level of cumulative nematode respiration than both fluctuating regimes, irrespective of earthworm presence. In conclusion, combined effects of earthworms and temperature regime drastically changed patterns of relationships within the nematode litter community. The results of the experiments may have implications for the perspectives of global warming events at the study site: it is suggested that the ultimate vector of the changes in litter environment might be directed towards the conditions of the treatment [T₁₅ regime; earthworms present], with the corresponding trends in the development of the litter nematode community.
16

Ecohydrology in the face of the Anthropocene

51%
Zalewski M.
International Journal of Ecohydrology and Hydrobiology
|
2007
|
tom 07
|
nr 2
99-100
17

Effects of saline-alkaline stress on early growth strategy and colonization success of Flaveria bidentis ( L.) Kuntze (Asteraceae ) - a new exotic plant in Northern China

51%
Chai M., Shi F., He K. S., Li R., Cao D., He Z.
Polish Journal of Ecology
|
2012
|
tom 60
|
nr 3
Flaveria bidentis, an annual grass native to South America, has invaded into many countries all over the world, including South Africa and Egypt in Africa, Britain and France in Europe, Japan in Asia, and Australia. In China, this plant species has been widely distributed in Hebei province since 2001 of its first discovery in Tianjin. In salinized soil of northern China, F. bidentis has formed mono dominant communities owing to its opportunistic characteristics. In this study, we investigated germination rate, germination energy, germination index and vigor index in response to different saline-alkaline stresses. Lengths of seedling, hypocotyl, and radicle were also examined. During germination process, germination rate, germination energy, germination index, and vigor index decreased due to higher salinity and alkalinity (pH). Hypocotyl elongation was stimulated at low salinity and alkalinity, but decreased with increasing salinity and alkalinity. The lengths of radicle and seedling were inhibited sharply with increasing salinity and alkalinity. These results suggest that a reciprocal enhancement between salt stress and alkaline stress was a characteristic feature during seed germination of F. bidentis. Ungerminated seeds resumed to germinate after transferred to distilled water, indicating that seeds remained viable during their exposure to saline-alkaline stresses. Stepwise regression analysis indicated that the effects of salinity, alkalinity (pH), and buffer capacity on seed germination and seedling growth were significantly different in magnitude. Salinity and alkalinity (pH) were the dominant factors in seed germination and seedling growth of F. bidentis respectively. burther, the results of this study suggest that F. bidentis has developed excellent adaptative strategy in its early stage of life cycle which partially explains its current invasion success in northern China.
18
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Water trophicity of Utricularia microhabitats identified by means of SOFM as a tool in ecological modeling

51%
Kosiba P., Stankiewicz A.
Acta Societatis Botanicorum Poloniae
|
2007
|
tom 76
|
nr 3
The study objects were 48 microhabitats of five Utricularia species in Lower and Upper Silesia (POLAND). The aim of the paper was to focus on application of the Self-Organizing Feature Map in assessment of water trophicity in Utricularia microhabitats, and to describe how SOFM can be used for the study of ecological subjects. This method was compared with the hierarchical tree plot of cluster analysis to check whether this techniques give similar results. In effect, both topological map of SOFM and dendrogram of cluster analysis show differences between Utricularia species microhabitats in respect of water quality, from eutrophic for U. vulgaris to dystrophic for U. minor and U. intermedia. The used methods give similar results and constitute a validation of the SOFM method in this type of studies.
19

ANT'PHIPODA, the biodiversity reference centre for Antarctic Amphipoda: A tool for developing and managing Antarctic marine biodiversity information

51%
De Broyer C., Duchesne P. A., Vander Linden C., Van Roozendael F., Jazdzewski K., Sicinski J., Jamar C., Chapelle G., Dauby P., Kuyken T., Nyssen F., Robert H.
Polskie Archiwum Hydrobiologii
|
2000
|
tom 47
|
nr 3-4
20

Challenges to freshwater management

51%
Somlyody L., Yates D., Varis O.
International Journal of Ecohydrology and Hydrobiology
|
2001
|
tom 01
|
nr 1-2
Water (including increasing use relative to availability, and deteriorating quality) may be one of the most severe stresses on the exponentially growing human population in the next century. Problems are becoming increasingly complex and diverse and require more and more specific knowledge from both a technical and non-technical perspective. These complexities create the need to understand and comprehend the more detailed technical components as well as broader managerial and societal issues. These non-complementary elements will increasingly demand the efficient integration of various disciplines, sectors, countries, and societies. The major challenges addressed are whether we are capable of and prepared to realize the needed integration and whether we can resolve the large amounts of existing gaps and barriers. The paper analyzes major past and desired future trends in fresh water management. There is an attempt to draw from the three main socio-economic regions: the developed world, Central and Eastern Europe (including countries of the former USSR) and the developing world. A number of issues are selected with regards to integrated freshwater management: • Identification, occurrence, and perception of various problems (e.g. eutrophication, acidification, global warming, salinization, groundwater contamination, eco-system degradation, land cover changes, vulnerability); • Current integration of methodologies; their strengths and weaknesses; • Large scale projects; dams, irrigation schemes and water transfers; • Global urbanization; • Wastewater treatment and pollution control types (considering also consumption emissions); • Modeling and monitoring; • Planning and environmental impact assessment; • Legislation and institutions; • Education and public awareness; • Sustainable development and time preference; • The role of science and engineering. The past two decades showed tremendous developments in the management of water as seen from many different perspectives. In spite of these advancements there is still room for improvement. The focus of the present discussion lays mostly on the dissemination of lessons and questions which are crucial to likely future problems and desired improvements.
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