1,721,166 research outputs found
Fig. 2 in The Phylogeographic Shortfall in Hexapods: A Lot of Leg Work Remaining
No full textFig. 2. Distribution and number of sequences available on GenBank for insect species, as obtained from the PhylogatR database (www.phylogatR.org). Cell colors represent the number of unique sequences at localities falling within that cell (see figure scale).Published as part of Satler, Jordan D., Carstens, Bryan C., Garrick, Ryan C. & Espíndola, Anahí, 2021, The Phylogeographic Shortfall in Hexapods: A Lot of Leg Work Remaining, pp. 1-18 in Insect Systematics and Diversity (AIFB) 5 (5) on page 6, DOI: 10.1093/isd/ixab015, http://zenodo.org/record/718235
Fig. 3 in Analysis of biodiversity data suggests that mammal species are hidden in predictable places
No full textFig. 3. Consensus results of species delimitation analyses. Phylogenetic distribution of hidden diversity estimated from strict consensus of delimitation results (SI Appendix, Table S1). Each silhouette represents a mammalian order with its shadow reflecting the ratio of predicted species to recognized species. Striped silhouettes represent orders with conflicting delimitation results that were not included in the predictive analysis. Phylogeny was adapted from ref. 31.Published as part of Parsons, Danielle J., Pelletier, Tara A., Wieringa, Jamin G., Duckett, Drew J. & Carstens, Bryan C., 2022, Analysis of biodiversity data suggests that mammal species are hidden in predictable places, pp. 1-7 in Proceedings of the National Academy of Sciences 119 (14) on page 4, DOI: 10.1073/pnas.2103400119, http://zenodo.org/record/644814
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
Fig. 3 in The Phylogeographic Shortfall in Hexapods: A Lot of Leg Work Remaining
No full textFig. 3. Distribution of phylogeography studies by major insect group.We conducted a literature search in Web of Science for publication titles including the term "Phylogeograph*" and insect order (the rank of class was used for Protura, Collembola, and Diplura).The search returned 1,955 total hits. (a) The proportion of phylogeography studies (black) and the proportion of described species (gray) for each group. Species numbers are from Stork (2018). (b) A phylogeny of Hexapoda (with relationships as estimated from Misof et al. 2014) matching our major insect groups, with colors matching those in panel a. Transparency in circles reflects the proportion of phylogeography publications for that group. Circles with bluer shades indicate groups with the bulk of insect phylogeography publications; circles with redder shades show insect groups receiving little or no phylogeographic attention.Published as part of Satler, Jordan D., Carstens, Bryan C., Garrick, Ryan C. & Espíndola, Anahí, 2021, The Phylogeographic Shortfall in Hexapods: A Lot of Leg Work Remaining, pp. 1-18 in Insect Systematics and Diversity (AIFB) 5 (5) on page 13, DOI: 10.1093/isd/ixab015, http://zenodo.org/record/718235
Fig. 2 in Analysis of biodiversity data suggests that mammal species are hidden in predictable places
No full textFig. 2. Scope of the dataset. Genetic sequences for ∼70% of currently recognized mammalian species were obtained. All mammalian orders are represented, with 23 orders containing sequences from both COI and cytb and 4 having only sequences from cytb. (A) Circle plots reflect species representation for the COI and cytb genes in each order. Dark bars represent the species present in the dataset and light bars represent species for which no genetic data are available. (B) Blue bars represent the proportion of the sequence database represented by each order, and gray bars represent the proportion of recognized species in each order. (C) A total of 3,205,630 geographic occurrence records were obtained for species present in the genetic database.Published as part of Parsons, Danielle J., Pelletier, Tara A., Wieringa, Jamin G., Duckett, Drew J. & Carstens, Bryan C., 2022, Analysis of biodiversity data suggests that mammal species are hidden in predictable places, pp. 1-7 in Proceedings of the National Academy of Sciences 119 (14) on page 3, DOI: 10.1073/pnas.2103400119, http://zenodo.org/record/644814
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
Does microhabitat influence cryptic diversity?: An investigation using microsnails (Punctum randolphi) from the Pacific Northwest rainforests.
Full text linkThe Pacific Northwest temperate rainforests are biodiversity hotspots with a dramatic geological history, with many species endemic to forests in the Cascades mountains. The Pleistocene glacial cycles drastically impacted the ranges of these endemics, with the much of the Northern Cascades mountain range being covered by alpine ice. Previous work suggests that many species survived the Pleistocene in small isolated refugia throughout the Pleistocene glaciation. Here, we investigate whether the microsnail Punctum randolphi was able to survive in the Northern Cascades throughout the Pleistocene by living in refugia and expand into its current range after the last glacial maximum. We also investigate whether P. randolphi harbors cryptic diversity due to divergence in these isolated refugia. Results from gene tree inference, multimodel inference and niche modeling suggest that P. randolphi was able to survive throughout Pleistocene glaciation in a single isolated refugium before expanding its range after the last glacial maximum.No embargoAcademic Major: Evolution and Ecolog
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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