1,721,029 research outputs found
Identifying plant communities of thermophilous deciduous forest in Greece: Species composition, distribution, ecology and syntaxonomy
No full textThermophilous deciduous forest is widespread in northern mainland Greece and extends in patches further south to Peloponnisos and the bigger islands. In this paper, we provide a phytosociological survey of the plant communities of deciduous oak and mixed forest throughout Greece, based on about 370 releves from the literature and more than 300 personal unpublished ones. Assocation names of the thermophilous deciduous forest are re-evaluated, and syntaxonomic conclusions added. The releves are classified, and 13 associations and several additional subtypes described and presented in synoptic constancy tables. The following associations were recognized, and characterized by species composition, ecology and distribution: 1. Phillyreo-Carpinetum orientalis, 2. Dryopterido pallidae-Ostryetum carpinifoliae, 3. Tilio tomentosae-Castanetum; 4. Genisto carinalis-Quercetum petraeae, 5. Querco frainetto-Castanetum, 6. Cytiso villosi-Castanetum; 7. Lathyro laxiflori-Castanetum; 8. Symphyto ottomani-Quercetum frainetto, 9. Verbasco glabrati-Quercetum frainetto; 10. Huetio cynapioidis-Quercetum frainetto; 11. Digitali viridiflorae-Quercetum frainetto; 12. Geranio asphodeloidis-Quercetum frainetto; 13. Oenantho pimpinelloidis-Quercetum frainetto. Associations 1-2 are assigned to the alliance Fraxino orni-Ostryion, 4-6 and 8-13 to the Quercion frainetto (both Quercetalia pubescentis), 3 interim to the Tilio-Acerion, and 7 to the Quercetalia ilicis. The two Quercetalia pubescentis alliances co-occur in northern Greece; their habitats differ chiefly in terms of soil conditions, bedrock and topography, rather than in overall climatic character
FIGURE 2 in Verbascum salicifolium (Scrophulariaceae) a new species from Central Macedonia, Greece
No full textFIGURE 2. Holotype of Verbascum salicifolium.Published as part of Zografidis, Aris, Liveri, Eleni, Ioannidis, Vasilis & Dimopoulos, Panayotis, 2022, Verbascum salicifolium (Scrophulariaceae) a new species from Central Macedonia, Greece, pp. 182-190 in Phytotaxa 552 (3) on page 187, DOI: 10.11646/phytotaxa.552.3.2, http://zenodo.org/record/677695
FIGURE 2 in Typification of the names Verbascum limnense and Celsia tomentosa (Scrophulariaceae) and a new nothospecies, V. × sipiadense, with the hybrid formula V. limnense × V. sinuatum
No full textFIGURE 2. Lectotype of Celsia tomentosa Zucc. kept in M (M-0244375).Published as part of Zografidis, Aris, Esser, Hans-Joachim, Dimopoulos, Panayotis & Raus, Thomas, 2022, Typification of the names Verbascum limnense and Celsia tomentosa (Scrophulariaceae) and a new nothospecies, V. × sipiadense, with the hybrid formula V. limnense × V. sinuatum, pp. 214-220 in Phytotaxa 542 (2) on page 217, DOI: 10.11646/phytotaxa.542.2.9, http://zenodo.org/record/641802
Hellenic Beech Forests Database (Hell-Beech-DB)
No full textThe Hellenic Beech Forests Database (GIVD ID EU-GR-007) includes relevés dominated or co-dominated by Fagus sylvatica s.l. It includes almost all published relevés from the northeast, north-central and east-central floristic regions of Greece. Ca. 50 unpublished relevés have been already entered and more than 300 new relevés are going to be entered soon. Furthermore, existing relevés from northwestern Greece are going to be entered to complete the data. Species data concern vascular plants and additionally most relevés have environmental data such as altitude, aspect, and slope inclination. For about 40% of the relevés precise geographic locality is given, while for a small proportion (ca. 3%) soil physical and chemical attributes are included. Relevé data have already been classified into 14 vegetation units, corresponding to the association or community level. The database is available for research purposes, upon agreement
Verbascum tomentosum Lamarck 1779
No full textVerbascum tomentosum Lamarck (1779: 260), nom. illeg. (published as a replacement name for the earlier V. phlomoides Linnaeus [1753: 1194]). Lectotype (designated by Fischer 1997: 115):— COUNTRY UNKNOWN. “ Habitat in Europa australi. D. Monti “, date unknown, Herb. Burser XIII: 125 (UPS).Published as part of Zografidis, Aris, Esser, Hans-Joachim, Dimopoulos, Panayotis & Raus, Thomas, 2022, Typification of the names Verbascum limnense and Celsia tomentosa (Scrophulariaceae) and a new nothospecies, V. × sipiadense, with the hybrid formula V. limnense × V. sinuatum, pp. 214-220 in Phytotaxa 542 (2) on page 216, DOI: 10.11646/phytotaxa.542.2.9, http://zenodo.org/record/641802
A new algorithm for the determination of differential taxa
No full textHow can we determine differential taxa in a vegetation data set? The new algorithm presented here uses an intuitive fidelity threshold based on relative constancy differences. It is tested on a simulated and a real data set. The results of the proposed algorithm are discussed in comparison with other methods used for the determination of differential taxa. The new algorithm defines each taxon in each group of relevEs as: (1) positively differentiating, (2) positively-negatively differentiating, (3) negatively differentiating, or (4) non-differentiating. Each taxon in a data set may be: (1) positively, positively-negatively or negatively differentiating for each group in the data set, (2) differentiating for some groups and non-differentiating for the remaining groups, or (3) non-differentiating for all groups in the data set. The new algorithm finds the relevE groups that are positively differentiated against other groups that are negatively differentiated. It reveals differentiating structures in the data set and thus makes quantification of the relations among and between different syntaxonomic ranks conceivable. As it distinguishes between different types of differential taxa, it might improve standards of typification in vegetation classification
The importance of soil water availability for local plant species richness in the alpine zone
No full textNo change in the balance between competition and facilitation along an alpine stress gradient
No full textGeographical and ecological differentiation in Greek Fagus forest vegetation
No full textQuestion: Which are the gradients of floristic differentiation in Greek beech ( Fagus sylvatica) forests? Which is the role of geographical and ecological factors in this differentiation? Location: Beech forests of the plant geographical regions Northeast, North Central and East Central Greece. Methods: A total of 1404 published and unpublished phytosociological releves were used in the analyses. TWINSPAN and DCA were applied to classify and ordinate the releves. Altitude, Indicator Values of releves and their X and Y coordinates were used in a posteriori interpretation of the ordination axes. Kendall ' s correlation coeffcients were calculated between DCA releve scores and explanatory variables. Multiple linear regression was used to partition the variation explained by the. rst two DCA axes, between the geographical and the ecological variables. Results: Classiffication resulted in 14 vegetation units defined by species composition. Two types of gradients, ecological and geographical, were revealed by the DCA of all releves. The partition of the variation accounted for by the. rst and second DCA axis was attributed mainly to ecological and geographical variables, respectively. Conclusions: Beech forests of northeast and Central Greece show phytogeographical differences, while ecologically similar vegetation units occur in both regions. A west-east gradient is revealed in Greek beech forest vegetation. The extent of the study area, its position along regional gradients and the comprehensiveness of the data set that is analysed determine the types of the gradients which can be revealed in a vegetation study
Figure 4. Seasonal range generated from a in Demographic characteristics, seasonal range and habitat topography of Balkan chamois population in its southernmost limit of its distribution (Giona mountain, Greece)
No full textFigure 4. Seasonal range generated from a Fixed Kernel Density Estimator (FKDE) (95% probability) and respective core areas of Balkan chamois in Giona Mt for (A) winter, (B) spring, (C) summer and (D) autumn. In the upper right corner the diagram presents the delineation of the probability of species occurrence within the core area.Published as part of Papaioannou, Haritakis, Sgardelis, Stefanos, Chondropoulos, Basilios, Vassilakis, Dimitrios, Kati, Vassiliki & Dimopoulos, Panayotis, 2014, Demographic characteristics, seasonal range and habitat topography of Balkan chamois population in its southernmost limit of its distribution (Giona mountain, Greece), pp. 327-345 in Journal of Natural History 49 (5) on page 336, DOI: 10.1080/00222933.2013.869365, http://zenodo.org/record/400407
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