1,720,973 research outputs found
On the identity of <em>Anchusa leucantha </em>(Boraginaceae) from northern Greece
No full textTan, Kit, Gjeta, Ermelinda, Mullaj, Alfred, Shuka, Lulezim, Vold, Gert (2013): On the identity of Anchusa leucantha (Boraginaceae) from northern Greece. Phytotaxa 140 (1): 35-42, DOI: 10.11646/phytotaxa.140.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.140.1.
FIGURE 3 in On the identity of Anchusa leucantha (Boraginaceae) from northern Greece
No full textFIGURE 3. Anchusa officinalis subsp. leucantha (from Librazhdi, SE Albania).Published as part of Tan, Kit, Gjeta, Ermelinda, Mullaj, Alfred, Shuka, Lulezim & Vold, Gert, 2013, On the identity of Anchusa leucantha (Boraginaceae) from northern Greece, pp. 35-42 in Phytotaxa 140 (1) on page 40, DOI: 10.11646/phytotaxa.140.1.3, http://zenodo.org/record/509979
Vegetation database of Albania
No full textAlthough Albania’s territory is small, its natural heritage is characterized by a high diversity of ecosystems and
habitats and a considerable species richness. This diversity is attributable to the country’s geographic position
(at the interface of three important regions: the Balkans, the Mediterranean region and southern continental
Europe), as well as geological, hydrological, climatic, soil diversity, and a large altitudinal range. The study of
the vegetation of Albania begun, apart from a few pioneer works, in the late 1980s. However, only recently
Albanian authors adopted the Zurich-Montpellier method. In the frame of a IUCN project (2012–2014) the
study of vegetation of two Albanian Protected Areas (PAs) has been carried out. These PAs were the Buna
River Protected Landscape (BRPL) and the Shebenik-Jabllanicë National Park (SJNP). We conducted an intensive
field campaign (532 phytosociological relevés) to investigate all the vegetation communities present in the
PAs. Here the resulting Vegetation Database of Albania (GIVD ID: EU-AL-001) is presented. The BRPL
(20.000 ha) comprises both the alluvial plain of the lower course of the Buna river which marks the boundary
between Montenegro and Albania, a carbonatic range and a narrow dune system along the Adriatic sea. Between
1947 and 1980 about 36 km2 of agricultural lands were reclaimed, at the expense of wetlands. Despite
these changes the vegetation is characterized by a high β-diversity (27 alliances and 46 associations), especially
in wetlands and dry grasslands. The SJNP (33.928 ha) is located along the border with Macedonia. The biodiversity
of the SJNP is a complex and dynamic result of several factors: the wide altitudinal range (roughly
300–2200 m a.s.l.), and the land use that, combined with large gradients of geological (conglomerate and sandstone-
limestone-ultramaphic rocks) topographical and climatic diversity, have determined a high diversity of
vegetation communities. In 2016 a new Italian development cooperation between IUCN and the Italian Botanical
Society aimed at several objectives and activities among which the vegetation investigation of another
five PAs in Albania, and the preparation of a preliminary list of Natura 2000 sites for the whole country, has
started. A new field campaign has already been carried out, so that this database will soon host relevés from all
over the country
The ophiolitic communities of Shebenik-Jablanice National Park (Albania)
No full textThe Shebenik-Jablanice National Park is located in east central Albania which is characterized by one of the most important outcrops of the Mirdita ophiolitic formation. Ophiolites are often serpentinized and rich in metals, and present therefore a specialized flora and vegetation, which has attracted much research, but which is still incompletely known. In this paper we present the main communities of this vegetation, which encompasses subalpine grasslands, scrub and dry grasslands. Six associations are presented as new (Stachyo scardicae-Buxertum sempervirentis, Daphno oleoidi-Ericetum herbaceae, Carici sempervirentis-Seslerietum coerulantis, Carici macrolepidis-Genistetum hassertianae, Alysso bertolonii subsp. scutarinum-Euphorbietum glabriflorae, Sedo serpentini-Festucopsietum serpentini) and a few others are presented without a formal description (Bornmuellera baldaccii community, Astragalus angustifolius community, Viola magellensis scree vegetation). Serpentinicolous dry grassland vegetation of the Shebenik mountains is compared to other communities of serpentines in Italy, Balkans and Greece and a new alliance is described for this community, Festucopsion serpentini (Halacsyetalia sendtneri) vicariant of the Centaureo-Bromion fibrosi which occurs in northern Albania and Kosovo. The alliance is characterized by a set of species which do not occur or are rare further north and by a relatively dry climate with Mediterranean affinity. We also present a thorny cushion vegetation with Astragalus angustifolius, which grows on limestone but is vicariant to the analogous community with Genista hassertiana. Finally, considering the rarity of these communities at continental scale, and their richness of endemic and rare species, we present the description of a new habitat for future inclusion in the Annex I of the Habitat Directive
The forest communities of Shebenik-Jabllanice National Park (Central Albania)
No full textAims: Albania is one of the most diverse countries in Europe (over 4560 plant taxa in 28,748 km2), but is still poorly known. We present here the phytosociological analysis of the forest communities of a mountain area in Central Albania. Study area: The Shebenik-Jabllanicë National Park (SJNP; 34,000 ha), located along the bor- der with Macedonia. Methods: 84 relevés have been carried out in the years 2012-2013 and subsequently 63 of these relevés were selected and classified by the Ward’s minimum variance Clustering, using package cluster of R software, to identify the forest communities of the park. Their diagnostic species have been selected using the fidelity coefficient in Juice software and for the ecological interpretation of vegetation differentiation we per- formed a non-metric multidimensional scaling (NMDS) analysis, using the vegan package of R. Results: The main vegetation belts in an altitudinal gradient are Quercus cerris-Quercus frainetto woodlands, Carpinus ori- entalis secondary formations, and forest dominated respectively by Quercus petraea, Fagus sylvatica and Pinus peuce. The vegetation is strikingly diverse, with 9 well characterized forest communities well segregated accord- ing to the large altitudinal gradient and the diverse geology (limestone and alluvial vs ophiolite and flysch). Conclusion: The forests of SJNP are characterized by striking β-diversity in a small area. The forests are often heavily exploited at lower altitude and the road network recently developed is causing new pressures and threats. The old growth beech forest (UNESCO World heritage site), the Balkan Pinus peuce forests and the marginal population of Pinus heldreichii deserve a careful monitoring and protection
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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