Search Results

1 - 10 of 54 items :

  • "ecological factor" x
Clear All
Wind – an important ecological factor and destructive agent in forests

, R. P., Ayres, M. P., Flannigan, M. D., Hanson, P. J. et al., 2001: Climate change and forest disturbances. BioScience, 51:723–734. Ennos, A.R., 1997: Wind as an ecological factor. Trends in Ecology and Evolution, 12: 108-111. Gardiner, B. A., Schelhaas, M. J., Blennow, K., Orazio, Ch., Landmann, G.: Wind storms and forest losses. A brief history of the wind damage to European forests. European Forest Institute, Forest Research. Avaiable at: www.forestreserach.gov.uk ; www.efi.int . Gardiner, B. A., 1995: The interaction of wind and tree

Open access
THE EVALUATION OF ECOLOGICAL FACTOR S AFFECTING ENVIRONMENTAL FUNCTION S OF THE SOIL S IN AREA OF TRADITIONAL AGRARIAN STRUCTURE S

Abstract

Krnačova Z., Hreško J., Kanka R., Boltižiar M.: The evaluation of ecological factors affecting environmental functions of the soils in area of traditional agrarian structure. Ekologia (Bratislava),Vol. 32, No. 2, p. 248-261, 2013. Cultural landscape can be seen as a result of hundred years of founding and sensitive cultivation of landscape structures respecting natural conditions. Specific geomorphological, climatic as well as social conditions enabled the conservation of original agrarian landscape structures mainly in the marginal regions of Slovakia. They are created by mosaic structures of extensively used small-scale landscape elements of permanent agricultural and arable land. An example of traditional agrarian way of using is foothill meadow-grazing landscape of the village Liptovska Teplička. By using the traditional extensive maintenance of the agricultural landscape, optimal environmental characteristics of soils were preserved. These were modified to some extent by the way of using and management. The submitted contribution is focused on the following:

• Indication of environmental characteristics of soils

• Quantification of the influence of chosen ecological factors on these environmental functions Seven research localities representing main types of the traditional landscape maintenance were chosen for needs of the research of soil and environmental conditions in a relation with the way of using the land and management. In given localities, we chose 21 sampling sites for secondary landscape structure (according to the legend of project Corine Land Cover, 2000), geological, soil, physical, biochemical and chemical conditions evaluation. Environmental functions indication was assessed in the following way: by assigning an amount of organic carbon (Cox) in a standard way (Fiala et al., 1999) for production functions, by assigning a ratio of granular fractions (pipetting method according to Novak) for retention functions. Buffering functions were evaluated potentiometrically by assigning an active soil reaction of pH (H2O) and exchange reaction of pH (KCl) in a soil. Highest values of Cox in the Ap horizon (7.67-6.62%), as well as pH of the soil environment (pH/KCl 7.26-7.21, pH/H2O 7.69-7.68) were assigned to anthrosolic and cultisolic rendzinas of extensively used grasslands. On the contrary, the lowest monitored values of organic matter Cox (2.51-2.53%), as well as pH of the soil environment (pH/KCl 4.81-5.21) (pH/ H2O 5.21-6.19) were indicated for soil subtypes anthrosols of the large fields and lithosol of theextensively used grasslands on non-carbonate substrates. Most favourable production and buffering soil properties were preserved in rendzinas on the carbonate substrates and extensively used meadows. Similarly, this type of soil on limestone used in a form of extensive meadows preserved also the most favourable retention functions according to the stated ratio of granularity fractions. Quantification of the influence of chosen ecological factors on environmental functions was performed using multivariate statistical methods, specifically principal component analysis (PCA). PCA is an indirect gradient analysis using the linear correlation of data, with a biplot as an output. Closeness of points in ordination graph represents their similarity of composition. The CANOCO (Ter Braak, Šmilauer, 2002) software was used to perform the analysis and to create the graph.

Open access
Methods to describe the botanical composition of vegetation in grassland research

.C. Hsieh (2012): Proposing a resolution to debates on diversity partitioning. Ecology 93, 2037–2051. 10.1890/11-1817.1 23094376 Chao A. Chiu C.-H. Hsieh T.C. 2012 Proposing a resolution to debates on diversity partitioning Ecology 93 2037 2051 Copeland, O.L. (1965): Land use and ecological factors in relation to sediment yields. Proceedings of the Federal Inter-Agency Sedimentation Conference 2, 72–84. Copeland O.L. 1965 Land use and ecological factors in relation to sediment yields Proceedings of the Federal Inter-Agency Sedimentation

Open access
Monitoring the Vitality of Isoëtes Lacustris by Using a Non-Destructive Method

References Boston H.L., Adams M.S., 1987, Productivity, growth and photosynthesis of two small “isoëtid” plants, Littorella uniflora and Isoëtes macrospora, J. Ecol. 75: 333-350. Ellenberg H., 1979, Zeigerwerte der Gefãßpflanzen Mitteleurapas, Scripta. Geobot. 9: 1-122. Gacia E., Ballesteros, E., 1994, Production of Isoëtes lacustris in a Pyrenean lake: seasonality and ecological factors involved in the growing period, Aquat. Bot. 48: 77-89. Grzybowski M., Endler Z., Jaworska B., 2008, Disappearance of Isoëtes lacustris localities and changes in the

Open access
Hydromorphological assessment of the anastomosing section of the Narew River after restoration

hydromorphological assessment of running waters based on the example of Mała Panew), Sindruk, Opole, p. 67 (in Polish). Dawson F.H., Szoszkiewicz K., 1999, Relationship of some ecological factors with the associations of vegetation in British rivers, Hydrobiologia 415: 117-122. [EA] Environment Agency, 2003, River Habitat Survey in Britain and Ireland. Field Survey Guidance Manual: 2003, Environment and Heritage Services, Warrington, p. 140. Górniak A., 2000, Klimat województwa podlaskiego (Climate of Podlaskie Voivodeship), IMGW, Białystok, p. 119

Open access
Young urban trees as important structures in the cultural heritage of cities – a case study from Prague

, 417: 1–17. Zackrisson O., Ostlund L., Korhonen O., Bergman I. 2000. The ancient use of Pinus sylvestris L. (Scots pine) inner bark by Sami people in northern Sweden, related to cultural and ecological factors. Vegetation History and Archaeobotany , 9, 2: 99–109.

Open access
Factors affecting the distribution patterns of aquatic macrophytes

: 53-63. Coops H., Brink F.W.B., Velde V.G., 1996, Growth and morphological responses of four helophyte species in an experimental water-depht gradient, Aquat. Bot. 54: 11-24. Cronk J.K., Fennessy M.S., 2001, Wetland Plants: Biology and Ecology, Lewis Publ., Boca Raton, pp. 462. Dale H.M., 1986, Temperature and light: the determining factor in maximum depth distribution of aquatic macrophytes in Ontario,Canada, Hydrobiologia 133: 73-77. Dawson F.H., Szoszkiewicz K., 1999, Relationships of some ecological

Open access
Distribution patterns, history, and dynamics of peatland vascular plants in Pomerania (NW Poland)

piaszczystych, pp. 61-65. WBiOS, ZJPK, Katowice. Dickson J. H. 1990. Epipactis helleborine in gardens and other urban habitats: an example for apophytism. In: H. Sukopp & S. Hejny (eds). Urban ecology, pp. 245-249. SPB Academic Publishing, The Hague. Dierssen K. 1982. Die wichtigsten Pflanzengesellschaften der Moore NW-Europas. 382 pp. Conservatoire et Jardin botaniques, Genève. Dufręne M. & Legendre P. 1991. Geographic structure and potential ecological factors in Belgium. J. Biogeogr. 18: 257

Open access
Assessment of Mountain Ecosystems Changes Under Anthropogenic Pressure in Latorica River Basin (Transcarpathian Region, Ukraine)

). Dominant species identity regulates invasibility of old-field plant communities. Oikos, 115, 549-558. DOI: 10.1111/j.2006.0030-1299.15172.x. Godefroid, S., Phartyal, S.S., Weyembergh, G. & Koedam N. (2005). Ecological factors controlling the abundance of non-native invasive black cherry (Prunus serotina) in deciduous forest understory in Belgium. For. Ecol. Manag, 210, 91-105. DOI: 10.1016/j.foreco.2005.02.024. Herenchuk, K. (1981). Nature of Zakarpatska Oblast (Transcarpathia). Lviv: Vyshcha Shkola Publishing House. Honnay O., Jacquemyn, H., Bossuyt, B

Open access
Antropogenically Created Forest Edge in the Starohorské Vrchy Mts. on the Example of Donovaly Village

Antropogenically Created Forest Edge in the Starohorské Vrchy Mts. on the Example of Donovaly Village

Forest edges represent specific elements forming the character of landscape. They are very important factors in ecological stability. To know and to understand them as a part of dynamic and hierarchic structure in vertical and horizontal shaping of the landscape contributes to understanding of the processes between forest and non-forested landscape in connection to influence of ecological factors towards broad knowledge of the country in the shape of its utilization and monitoring of its dynamic changes. The aim of the paper is to analyze in a geographic sense the types of anthropic forest edges in the area of Starohorské vrchy Mts. (on the example of Donovaly village) and their partial geographic synthesis in the frame of chosen attributes and forest edge functions. Basic question is whether human activity influences the dynamics of environmental variables, its structure, taxonomic diversity and other attributes of forest edges.

Open access