Papers by ELENI ELEFTHERIADOU
The geographical distribution of the birch (BeTula pendula Roth.) in Greece is Limited to the nor... more The geographical distribution of the birch (BeTula pendula Roth.) in Greece is Limited to the northern mountains (Varnous, Voras, Vennio, Paiko, Beles, Orvilos, Lailias, Pangeo, Phalakro and Rhooope). The unique extensive pure Betula penduta - forest, which covers an area of about 1755 ha, occurs in the western part of the Rhodope mountain range. The other appearances of birch in the Greek area are limited either to small stands or to individuals in mixture with other forest trees. The Betula pendula forest in western Rhodope have been studied using the Braun - B1anquet mtethod with 36 phytosociological releves. Two associations. Querco dalechampii - Betuletum pendulae (Quercetalia pubescentis) and Fago sylvalicae - Betuletum pendulae (Fagetali sylvAticae ), as well as rurther subdivisions, are distinguished. Their syntaxonomy as well as information about the site characteristics, structure and syndynamical position of the distinguished communities are given.
In the current study the authors report for the first time the occurrence of Salix ×velchevii, a ... more In the current study the authors report for the first time the occurrence of Salix ×velchevii, a recently described willow hybrid, in Greece. The specimens were collected from three localities in the northeastern part of the Drama Prefecture, at low altitudes, where both parent species were present. Detailed information concerning the taxon’s ecology is provided too. Finally, a contribution to its description is made with the measurement and description of the leaf morphological characters and with the first- time description of the female catkins and fruits.
Mediterranean Erica heathlands and evergreen broadleaved shrublands consist considerably degraded... more Mediterranean Erica heathlands and evergreen broadleaved shrublands consist considerably degraded communities primarily due to overgrazing and repetitive fires. A phytosociological analysis of these communities was carried out at the north side of Mount Cholomon (Chalkidiki, N. Greece) using the Braun-Blanquet method. The classification of the vegetation units was achieved through Twinspan analysis on 80 relevés and resulted in one community and one association. The evergreen broadleaved shrublands are assigned to the Quercetea (-alia) ilicis, as Arbutus unedo-Erica arborea community, and the Erica manipuliflora heathlands to the Cisto-Micromerietea julianae, as Ericetum verticillatae association. The floristic composition of the research area consist of 176 taxa comprising high number of taxa belonging to the classes Thero-Brachypodietea and Festuco-Βrometea that confirm the intense degradation.
The area of responsibility of the «Management Agency of Olympus National Park» encompasses a vari... more The area of responsibility of the «Management Agency of Olympus National Park» encompasses a variety of habitat types, a result of the great variation in micro-site conditions due to differences in bedrock, exposition, elevation, inclination and from the relief of the area in general. The potential natural vegetation of the aforementioned area, resulting from the macro- and micro-climate and the edaphic variability, is expressed by four vegetation zones and their subdivisions, as well as by azonal and extrazonal vegetation types. The four zones are: Eu-mediterranean vegetation zone (Quercetalia ilicis), zone of beech, beech - fir and mountainous para-mediterranean coniferous forests (Fagetalia), zone of cold resistant conifers (Vaccinio-Piceetalia) and non-forested zone of high mountains (Astragalo-Acantholimonetalia or Daphno-Festucetalia). The submediterranean vegetation zone of the deciduous oak forests (Quercetalia pubescentis) is not clearly expressed. The actual vegetation, ma...
Mt. Vourinos (1866 m) is situated in Western Macedonia, in the regional units of Grevena and Koza... more Mt. Vourinos (1866 m) is situated in Western Macedonia, in the regional units of Grevena and Kozani and consists of serpentine and calcareous rocks. It includes the “Natura 2000” network areas encoded GR1330001 and GR1330002 and the flora is characterized by high endemism percentage. A floristic catalog consisting of 340 taxa (247 species, 93 subspecies and 2 varieties) is presented. There were 62 taxa recorded for the first time and are considered new to the area flora. Furthermore, 23 rare and protected species were found.
The study of secondary vegetation’s succession is an important tool for the restoration and the b... more The study of secondary vegetation’s succession is an important tool for the restoration and the biodiversity enhancement of disturbed ecosystems. In the present paper, the secondary succession of vegetation was studied in an area, situated in the estuary of Aliakmon river, that had been partly cultivated until the year 1999 when it was included in the project ‘long-term pause of cultivation of agricultural land’ (Regulation 2078/92). Vegetation’s succession was studied by means of eight permanent plots, applying non-metric multidimensional scaling ordination. Additionally, the chorological spectra were analyzed and the possibility that some chorological units could be used as indicators of primary or later stages of succession was tested via indicator species analysis. The results demonstrate that a) based on the floristic composition and the structure of vegetation, four groups, reflecting different phases of succession, can be distinguished and b) the analysis of chorological spec...
Progress in Botanical Research, 1998
A modern pollen deposition monitoring program has been initiated in Greece for the first time. Fo... more A modern pollen deposition monitoring program has been initiated in Greece for the first time. For this purpose six modified Tauber traps (Hicks and Hyvarinen, 1986), were placed on a transect from black pine (Pinus nigra) forest to the tree-line of Scots pine (Pinus sylvestris) in the Pieria mountains.
Willdenowia, 2013
BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.
Phytochemistry, 2014
The chemical composition of the essential oil (analysed by GC and GC-MS), the types and distribut... more The chemical composition of the essential oil (analysed by GC and GC-MS), the types and distribution of trichomes and pollen morphology (analysed by scanning electron microscopy) were investigated in two closely related species, Micromeria kerneri Murb. and Micromeria juliana (L.) Benth. (Lamiaceae) from Southeast Europe as a contribution to their taxonomy. The essential oil of M. kerneri was characterized by a high concentration of oxygenated sesquiterpenes, with caryophyllene-oxide as the major compound. Caryophyllene-oxide was also the major component of the essential oil of M. juliana from all localities, except from Mt Krivošije (Montenegro), where piperitone oxide was the major constituent. Non-glandular trichomes, peltate trichomes, and two types of capitate trichomes (type 1 composed of one basal epidermal cell, and one head cell with subcuticular space; type 2 composed of one basal epidermal cell, two stalk cells, and one head cell with subcuticular space) were observed on leaves, the calyx and on the stem. Pollen of both species had six apertures (hexacolpate) set in the equatorial pollen belt (zonocolpate) and showed medium reticulate ornamentation. Multivariate analysis (PCA and UPGMA) of essential oil components clearly separated the investigated M. kerneri and M. juliana populations, and confirmed the opinion that they are different taxa. On the other hand, micromorphological traits between these species were the same. Nevertheless, definitive conclusions about the taxonomic relationships among these species will require genetic analysis.
Journal of Irrigation and Drainage Engineering, 2011
... REF-ET Software, University of Idaho. http://www.kimberly.uidaho.edu/ref-et/. ... Drain Eng.,... more ... REF-ET Software, University of Idaho. http://www.kimberly.uidaho.edu/ref-et/. ... Drain Eng., 128(3), 180184. Irmak, S., Allen, RG, and Whitty, EB (2003). Daily grass and alfalfa-reference evapotranspiration estimates and alfalfa-to-grass evapotranspiration ratios in Florida. J. Irrig. ...
Willdenowia, 1996
Page 1. Willdenowia 25 - 1996 455 ELENI ELEFTHERIADOU & THOMAS RAUS ... Forest roads ... more Page 1. Willdenowia 25 - 1996 455 ELENI ELEFTHERIADOU & THOMAS RAUS ... Forest roads were built from 1976 to 1979, and the immense stock of wood was exploited to a limited extent until, in 1980, the area was declared a totally protected nature reserve. ...
Acta Botanica Croatica, 2014
Vegetation succession is a key element for research studying biodiversity losses, effects of clim... more Vegetation succession is a key element for research studying biodiversity losses, effects of climatic change on ecosystems, invasive species and restoration of ecosystems in which human activities have shifted their natural or semi-natural vegetation. Surrogate variables like Pignatti's bioindicator values or dissimilarity indices can provide further insights regarding succession trajectories aggregating the combined effects of changes in the cover/abundance of taxa. The land-use abandonment in an area in the estuary of the River Aliakmon, N. Greece, provides an opportunity to study medium-term rates and patterns during the first twelve years of vegetation succession. Cluster and time-series analyses of turnover rates, Sørensen's dissimilarity index and Pignatti's bioindicator values revealed clear differences in succession patterns and rates among permanent plots. Succession rates and patterns in the study area were found to be dominated by two ecological factors. On th...
Journal of environmental protection and ecology
Drosera rotundifolia has a circumboreal distribution and is widespread and abundant in many regio... more Drosera rotundifolia has a circumboreal distribution and is widespread and abundant in many regions. Globally it is not threatened with extinction in the foreseeable future; however, the occurrences located within Greece are geographically isolated. The 3 localities of D. rotundifolia are located in small moors in Drimos Xanthi. D. rotundifolia is characterised as endangered (EN) according to the Red Data Book of Rare and Threatened Plants of Greece. The most immediate threats to D. rotundifolia are events that alter the hydrologic function of its habitats. Changes that may negatively affect or deteriorate the quality of Drosera rotundifolia natural habitats should be prevented. Primary and other conservation measures are proposed in order to improve the ecological conditions of the biotope and thus effectively to contribute to the D. rotundifolia protection. Phytosociologically, D. rotundifolia participates to sub-association Caricetum nigrae, Sphagnetosum subsecundi.
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Papers by ELENI ELEFTHERIADOU