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Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes
No full textSim, Kathrin A., Buddle, Christopher M., Wheeler, Terry A. (2014): Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes. Zootaxa 3884 (2): 169-178, DOI: http://dx.doi.org/10.11646/zootaxa.3884.2.
FIGURE 2 in Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes
No full textFIGURE 2. Box plots (heavy line = median; box = quartiles; dashed line = range) of genitalic characters of Nearctic Pardosa lapponica and P. concinna. The mean size of all characters is significantly larger in P. concinna (grey boxes), but the size range overlaps between the two species. l.—length; M.—median; w.—width.Published as part of Sim, Kathrin A., Buddle, Christopher M. & Wheeler, Terry A., 2014, Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes, pp. 169-178 in Zootaxa 3884 (2) on page 173, DOI: 10.11646/zootaxa.3884.2.5, http://zenodo.org/record/495160
FIGURE 2 in Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes
No full textFIGURE 2. Box plots (heavy line = median; box = quartiles; dashed line = range) of genitalic characters of Nearctic Pardosa lapponica and P. concinna. The mean size of all characters is significantly larger in P. concinna (grey boxes), but the size range overlaps between the two species. l.—length; M.—median; w.—width.Published as part of Sim, Kathrin A., Buddle, Christopher M. & Wheeler, Terry A., 2014, Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes, pp. 169-178 in Zootaxa 3884 (2) on page 173, DOI: 10.11646/zootaxa.3884.2.5, http://zenodo.org/record/495160
FIGURE 3 in Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes
No full textFIGURE 3. Variation within the epigynes of female Pardosa lapponica and P. concinna specimens: a) P. lapponica specimen from Dempster Hwy, hood low and short septal ridge; b) P. lapponica from Dempster Hwy, hood low and septal pocket irregular; c) P. lapponica from Churchill, hood malformed and septal ridge completely exposed; d) P. concinna from North Battleford, hood high and septal pocket smooth; e) P. concinna from Yellowknife, hood malformed with exposed septal ridge; and f) P. lapponica from Churchill, straight and curved spermathecae. White arrows indicate the hood. The black arrows indicate the septal pockets. The dashed arrows indicate the copulatory tubes, curved in d) and straight in e).Published as part of Sim, Kathrin A., Buddle, Christopher M. & Wheeler, Terry A., 2014, Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes, pp. 169-178 in Zootaxa 3884 (2) on page 174, DOI: 10.11646/zootaxa.3884.2.5, http://zenodo.org/record/495160
FIGURE 4 in Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes
No full textFIGURE 4. Apical division of the male pedipalp: a) Pardosa concinna from Yellowknife; b) P. concinna from Yellowknife; and c) P. lapponica from Dempster Hwy. The white arrow indicates the position of the protrusion on the palea, present in a) and absent in b) and c). Black arrows indicate the conductor, protruding past the lower limit of the terminal apophysis in c). The conserved shape of the embolus can be seen in b) and c). Inter-specific variation in the terminal apophysis can be seen between a), b) and c).Published as part of Sim, Kathrin A., Buddle, Christopher M. & Wheeler, Terry A., 2014, Species boundaries of Pardosa concinna and P. lapponica (Araneae: Lycosidae) in the northern Nearctic: morphology and DNA barcodes, pp. 169-178 in Zootaxa 3884 (2) on page 174, DOI: 10.11646/zootaxa.3884.2.5, http://zenodo.org/record/495160
Community structure of an assemblage of Northern flies (Diptera) among varying spatial scales
No full textThis thesis explores the ecological and evolutionary dynamics shaping northern Canadian Diptera assemblages. Despite their significance in Arctic ecosystems, research on northern flies is limited due to taxonomic challenges. Molecular tools, such as the cytochrome c oxidase subunit I (COI) universal animal barcode fragment and Barcode Index Numbers (BINs), provide a solution for studying fly community structure. Real Diptera BIN datasets were used in this thesis to explore fly community assembly. Understanding why groups of species are found at one location but not another requires consideration of their physiological requirements/limitations, dynamics with other species and abiotic environment, and evolutionary history. These processes act as successive sieves at the regional and local scale: evolutionary and biogeographic processes create the species pool; dispersal and physiological tolerances decide species presence; biotic and abiotic interactions operate at individual and species levels. Two popular metrics used to measure “community assembly” are the standard effect size of mean nearest taxon distance (ses.MNTD) and mean pairwise distance (ses.MPD), which compare local samples to the regional species pool. The first study assesses the reliability of calculating ses.MNTD and ses.MPD while subsampling a Diptera dataset from Churchill, Manitoba. Results suggest high sample percentages are necessary for accurate calculations, with optimal subsampling strategies depending on goals. The second study had a continental focus and investigates muscid fly ecology and phylogenetic structure across ecoclimatic zones in the Canadian North using 15,675 Muscidae individuals across 207 BINs. Unique patterns in assemblage composition and evolutionary structure were revealed, highlighting the influence of environmental factors on regional species pools. The third study had a local focus and examined the ecological and evolutionary dynamics of brachyceran Diptera in Churchill, Manitoba. 1,066 Brachycera individuals were collected, and 910 were successfully barcoded and grouped into 146 BINs. Distinct assemblages were found in boreal forest and tundra habitats and larger species were favored in the tundra, suggesting habitat-specific trait selection. Overall, this thesis highlights the complex interplay between ecological and evolutionary processes in shaping fly assemblages in the Canadian North, which is crucial knowledge for informing conservation and ecosystem management strategies in the face of climate change
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
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