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Impact of sample size on principal component analysis ordination of an environmental data set: effects on eigenstructure

References Anderson, M.J. & Wilis T.J. (2003). Canonical analysis of principal coordinates: a useful method of constrained ordination for ecology. Ecology , 84, 511–525. DOI: 10.1890/0012-9658(2003)084[0511:CAOPCA]2.0.CO;2. APHA, (1992). Standard methods for the examination of water and waste water . American Washington: Public Health Association. Bandalos, D.L. & Boehm-Kaufman M.R. (2009). Four common misconceptions in exploratory factor analysis. In C.E. Lance & R.J. Vandenberg (Eds.), Statistical and methodological myths and urban legends

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Multiple Parallel Ordinations: the Importance of Choice of Ordination Method and Weighting of Species Abundance Data

References Austin, M.P. & Greig-Smith, P. 1968. The application of quantitative methods to vegetation survey: II. Some methodological problems of data from rain forest. J. Ecol 56: 827-844. Beals, E.W. 1973. Ordination: Mathematical elegance and ecological naivete. J. Ecol. 61: 23-35. Bratli, H., Økland, T., , Økland, R.H., Dramstad, W.E., Elven, R., Engan, G., Fjellstad, W., Heegaard, E., Pedersen, O. & Solstad, H. 2006. Patterns of variation in vascular plant species richness and composition in SE Norwegian

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Diversity and gradients of vegetation of Sivrihisar Mountains (Eskişehir-Turkey)

, M., Serin, M., 2000: The steppe vegetation of the area among Hadim (Konya), Ermenek and Bucakkışla (Karaman). Selçuk Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi 1, 21–35 (in Turkish). Tatlı, A., Eyce, B., Serin, M., 1994: The vegetation of Kızılören, Çal and Loras Mountains (Konya). Turkish Journal of Botany 18, 267–288 (in Turkish). Ter Braak, J. F. C., Šmilauer, P., 2002: CANOCO Reference Manual and CanoDraw for Windows User’s Guide, Software for Canonical Community Ordination (version 4.5) Wageningen. Tichý, L., 2002: JUICE, software for

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Phylogenetic Diversity of Plant Metacommunity of the Dnieper River Arena Terrace Within the ‘Dnieper-Orilskiy ’ Nature Reserve

, C.J.F. & Champely S. (1996). Matching species traits to environmental variables: a new three-table ordination method. Environ. Ecol. Stat., 3, 143-166. DOI: 10.1007/BF02427859. Elton, Ch. (1946). Competition and the structure of ecological communities. J. Anim. Ecol., 15, 54-68. DOI: 10.2307/1625. Euro+Med (2006−2016). Euro+Med PlantBase - the information resource for Euro- Mediterranean plant diversity. Published on the Internet http://ww2.bgbm.org/EuroPlusMed/ [accessed 1st January 2016]. Faith, D.P. (1992

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Gradients analyses of forests ground vegetation and its relationships to environmental variables in five subtropical forest areas, S and SW China

purum to a Mineral Nutrient Pulse. - Funct Ecol. 8: 686-693. Beatt Y, S. W. & Sholes, D. D. V. 1988. Leaf litter effects on plant species composition of deciduous forest treefall pits. - Can J For Res. 18: 553-559. Belbin, L. 1991. Semi-strong hybrid scaling: a new ordination algorithm. -J. Veg. Sci. 2: 491-496. Belbin, L. 1993a. PATN Technical Reference Manual. - CSIRO Division of Wildlife and Ecology, pp. 234. Belbin, L. 1993b. PATN User Manual. - CSIRO Division

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Stipetum novakii ass. nova – a new association of serpentine rocky grassland vegetation (Halacsyetalia sendtneri) in Serbia

the Brdjani gorge. Acta Agriculturae Serbica 9, 65-72. WALTER, H., LEITH, H., 1964: Klimadiagramm-Weltatlas 2. Gustav Fischer Verlag, Jena. WESTHOFF, V., VAN DERMAAREL, E., 1973: The Braun-Blanquet approach. In: WHITTAKER, R. H. (ed.), Ordination and classification of communities, Handbook of Vegetation Science 5, 619-726. W. Junk, Hague.

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The Tall-Herb and Tall-Grass Plant Communities of the Class Mulgedio-Aconitetea in the Subalpine Belt of the Krivánska Malá Fatra MTS (Slovakia)

. J. F. & Šmilauer, P. 2002: CANOCO reference manual and CanoDraw for Windows user's guide. Software for canonical community ordination (version 4.5). Biometris, Wageningen & České Budějovice, 500 pp. Theurillat, J.-P., Aeschimann, D., Kupfer, Ph. & Spichiger, R. 1995: The higher vegetation units of the Alps. Colloques Phytosociologiques 23 (1994): 189-239. Tichý, L. 2002: JUICE, software for vegetation classification. Journal of Vegetation Science 13: 451-453. Tichý, L. & Chytrý, M

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Vegetation composition, gradients and environment relationships of birch forest in six reference areas in Norway

for multivariate direct gradient analysis. - Ecology 67: 1167-1179. Braak, C.J.F. ter 1987a. The analysis of vegetation-environment relationships by canonical correspondence analysis. - Vegetatio 69: 69-77. Braak, C.J.F. ter 1987b. CANOCO - a FORTRAN program for canonical community ordination by (partial) (detrended) (canonical) correspondence analysis, principal components analysis and redundancy analysis (version 2.1). - TNO Inst. Appl. Comp. Sci., Stat. Dept. Wageningen, Wageningen

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The Alliances Arrhenatherion, Cynosurion and Trifolion Medii in Western Bulgaria - Environmental Gradients and Ecological Limitations

Vegetation Ecology. John Wiley & Sons, Inc., New York, 547 pp. Oberdorfer, E. 1994: Exkursionsflora. Verlag Eugen Ulmer., Stuttgart, 1049 pp. Otýpková Z. & Chytrý M. 2006: Effects of plot size on the ordination of vegetation samples. Journal of Vegetation Science 17: 465-472. Parolly, G. 2003: Towards common standards in phytosociological papers submitted to the Turkish Journal of Botany: A Letter from the Editor. Turkish Journal of Botany 27: 163-165. Pavlov, D

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Numeric syntaxonomical analysis of communities of the Molinia caerulea complex in Southwestern of Ukraine

Abstract

The aims of the paper are: i) to establish the coenotic affinity of each species of the Molinia caerulea complex in the southwest of Ukraine, ii) to present the results of a comparative analysis of the syntaxa in which include Molinia, iii) to explain possible reasons for the expansion of Molinia caerulea in the studied area. The study area ranges from the basins of the Upper Prut River to the Upper Siret River in Ukraine. To determine the coenotical affinity of the studied species, 134 relevés were analysed. The data analysis was carried out using the Modified TWINSPAN algorithm provided by the JUICE software. Ecological features of the communities were analyzed by means of a DCA-ordination and phytoindication assessment. It was revealed that in the studied region the species of the Molinia caerulea complex are characterized by a relatively wide coenotic and ecological range and that they can be attributed to different communities of 4 vegetation classes: Molinio-Arrhenatheretea (Polygono bistortae-Trisetion flavescentis, Molinion cearuleae, Arrhenatherion elatioris alliances), Festuco-Brometea (Bromion erecti alliance), Mulgedio-Aconitetea (Calamagrostion villosae alliance), Oxycocco-Sphagnetea (Sphagnion magellanici alliance). This paper presents the results of the floristic composition analyses outlines some ecological peculiarities and discusses the conservational values of the identified syntaxa.

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