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FIGURE 5 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 5. Growth forms of lichens in the Tamentout Forest.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 205, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
FIGURE 2 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 2: Number of lichen species on the different phorophytes in the Tamentout Forest.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 202, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
FIGURE 4 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 4: Parmeliella testacea from the Tamentout Forest (Belguidoum, A. no. Cl92, ABHCH) A. Thallus overview (h: black hypothallus; arrow: button-shaped soralia). B. close-up of humid, bluish green thallus (arrow: button shaped soralia). C. close-up of wet, olive thallus. Scale bars: 5 mm.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 205, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
Parmeliella testacea
No full textDescription of Parmeliella testacea from the Tamentout Forest: The species has a squamulose to minutely foliose thallus composed of pale chestnut-brown to gray-brown lobes, forming a rosette. It tightly adheres to its substrate with distinct peripheral lobes and its upper surface is fragile (Fig. 4). When wet, the thallus turns dark blue-gray. The thallus is sorediate with dark gray, coarsely granular soredia formed in predominantly marginal, sometimes also laminar, button-shaped soralia. These soralia are initially concolorous with the thallus surface, their soredia sometimes brittle, on a ± uniform surface, which may become coarsely cracked along the margin. The thallus resides on an arachnoid hypothallus, blue-black in color. In the specimens collected in Algeria, apothecia were not observed; the photobiont is Nostoc. Notes: Only a single corticolous specimen of Parmeliella testacea was found in the Tamentout Forest, growing on Q. suber. The species generally appears to be quite rare, and in France its threat status has been assessed according to IUCN red-list criteria as Vulnerable (VU) by Roux et al. (2017). In the past, the species had been reported from England, but it is considered extinct (Cannon et al. 2021). Specimen examined. ALGERIA. Setif Province: Tamentout Forest, Collection Site 5 (36° 30ꞌ 52ꞌꞌN, 5° 44ꞌ 05ꞌꞌE), 961 m altitude, 2021, Belguidoum, A . no. Cl 92 (ABHCH).Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 204, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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