1,721,115 research outputs found
Contributions to Disholcaspis Dalla Torre And Kieffer (Hymenoptera: Cynipidae: Cynipini)
No full textCooke-Mcewen, Crystal, Gates, Michael (2020): Contributions to Disholcaspis Dalla Torre And Kieffer (Hymenoptera: Cynipidae: Cynipini). Zootaxa 4859 (3): 355-382, DOI: https://doi.org/10.11646/zootaxa.4859.3.
Microbial community Phylogeny and function in relation to environment in the Norwegian Sea: A high-throughput community-sequencing-based assessment
No full textSignificant changes to seasonal ice cover, stratification, and warming are altering the oceanic boundaries between Polar and Atlantic Water masses. The resultant increased mixing and intrusion of Atlantic Waters into the Arctic region is resulting in novel competition between extant microbial communities that drive biogeochemical cycles and underpin the food-web in these regions. However, it remains unclear how extant microbial communities will respond to these new opportunities and challenges. This work aims to provide an insight into how the bacterial and microbial eukaryotic communities present across a transect in the Norwegian Sea may be impacted by predicted future environmental change to the Arctic region through the use of Next Generation Sequencing methodologies. It is revealed that the microbial communities of the region are being partitioned into distinct assemblages that correlate with gradients of temperature and salinity.Analysis of the microbial communities from locations influenced by both Polar and Atlantic waters is used to indicate which components of the microbial communities will be selected for as these waters mix. The results of these analyses suggests the potential for the displacement of bacterial communities found at locations determined to be highly influenced by Polar Water, by bacterial communities from locations found to be primarily influenced by Atlantic Waters. This response appears consistent for all abundance fractions and constituent taxonomic groups within the bacterial community.Analysis of the eukaryotic community suggests a more complex response whereby abundant eukaryotic cold water associated species could dominate over temperate associated species, and different eukaryotic lineages display contrasting responses. Metatranscriptomes are generated for the eukaryotic community to determine the functional differences between the regional communities. Partitioning was observed which matched the gradient of Polar Water influence implying the presence of distinct genetic profiles between regional communities.Each station is observed to feature different profiles of gene expression for genes related to key ecosystem process including primary production, nutrient cycling, biogeochemical cycles, the carbon cycle and metabolic processes. However, despite some differences in the expression of functional profiles, functionality is found to be largely conserved across regional communities, suggesting increase Atlantic Water influence within the sampled region may not result in large perturbations to ecosystem functionality, despite potential changes to community composition.This study has significant implications for the vulnerability of polar associated community assemblages, which may become displaced under predicted increasesof Atlantic mixing and warming within the Arctic region.<br/
FIGURES 13–17. 13 in Nomenclatural Notes on the Eurytomids (Chalcidoidea: Eurytomidae) Described by Jean Brèthes Housed in Museo Argentino de Ciencias Naturales " Bernardino Rivadavia "
No full textFIGURES 13–17. 13, Bruchophagus opposita, lectotype and paralectotype card mount; 14, Bruchophagus opposita, lectotype; 15, Proseurytoma parodii, lectotype and paralectotype card mount; 16, Proseurytoma parodii, lectotype lateral habitus; 17, Aximopsis vulgata, holotype lateral habitus.Published as part of Gates, Michael W., 2014, Nomenclatural Notes on the Eurytomids (Chalcidoidea: Eurytomidae) Described by Jean Brèthes Housed in Museo Argentino de Ciencias Naturales " Bernardino Rivadavia ", pp. 185-193 in Zootaxa 3790 (1) on page 191, DOI: 10.11646/zootaxa.3790.1.9, http://zenodo.org/record/22949
Eurytoma ridiaschinae Brethes
No full textEurytoma ridiaschinae Brèthes urn:lsid:zoobank.org:act: 1797 F 6 E 2 - 1 C 7 A- 4892 -B 3 C 4 -A 1 FFD 2 FDE 952 Eurytoma ridiaschinae Brèthes, 1916 b: 415. Type material. Missing from collection of MACN.Published as part of Gates, Michael W., 2014, Nomenclatural Notes on the Eurytomids (Chalcidoidea: Eurytomidae) Described by Jean Brèthes Housed in Museo Argentino de Ciencias Naturales " Bernardino Rivadavia ", pp. 185-193 in Zootaxa 3790 (1) on page 192, DOI: 10.11646/zootaxa.3790.1.9, http://zenodo.org/record/22949
FIGURE 1. Maximum likelihood tree for cytb and ITS2 in Contributions to Disholcaspis Dalla Torre And Kieffer (Hymenoptera: Cynipidae: Cynipini)
No full textFIGURE 1. Maximum likelihood tree for cytb and ITS2, for known species of Disholcaspis and unidentified specimens. Names starting with "D_" represent specimens from Nicholls et al. (2017). Names starting with USNM are newly collected; those in blue (only) can be assigned to previously-described species based on phylogenetic placement, genetic distances, and host plant data. Bootstrap values above 50% are shown to the left of the nodes.Published as part of Cooke-Mcewen, Crystal & Gates, Michael, 2020, Contributions to Disholcaspis Dalla Torre And Kieffer (Hymenoptera: Cynipidae: Cynipini), pp. 355-382 in Zootaxa 4859 (3) on page 361, DOI: 10.11646/zootaxa.4859.3.3, http://zenodo.org/record/441315
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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