1,720,965 research outputs found
Assessing the potential for avifauna recovery in degraded forests in Indonesia
No full textMarthy, William, Clough, Yann, Tscharntke, Teja (2017): Assessing the potential for avifauna recovery in degraded forests in Indonesia. Raffles Bulletin of Zoology 65: 35-48, DOI: 10.5281/zenodo.535584
Assessing the biodiversity value of degraded lowland forest in Sumatra, Indonesia
No full textForest degradation, forest fires, and wildlife poaching have devastated biodiversity in Indonesia. To assess the impact of forest degradation and the potential for recovery, we used birds as a proxy for biodiversity and assessed density estimates (hereafter density) in the degraded lowland forest of Harapan Rainforest Ecosystem Restoration Concession (HRF) in Sumatra. In this study, a total of 149 bird species (from 5,317 individuals) were recorded. Of the 103 species for which densities could be calculated, 45% were lowland bird specialists (i.e. species occurring below 200 m above sea level in Sumatra), including three globally threatened and 41 Near-Threatened species. Comparison with bird densities in degraded forest of Borneo..
Assessing the biodiversity value of degraded lowland forest in Sumatra, Indonesia
No full textForest degradation, forest fires, and wildlife poaching have devastated biodiversity in Indonesia. To assess the impact of forest degradation and the potential for recovery, we used birds as a proxy for biodiversity and assessed density estimates (hereafter density) in the degraded lowland forest of Harapan Rainforest Ecosystem Restoration Concession (HRF) in Sumatra. In this study, a total of 149 bird species (from 5,317 individuals) were recorded. Of the 103 species for which densities could be calculated, 45% were lowland bird specialists (i.e. species occurring below 200 m above sea level in Sumatra), including three globally threatened and 41 Near-Threatened species. Comparison with bird densities in degraded forest of Borneo..
Fig. 1 in Assessing the potential for avifauna recovery in degraded forests in Indonesia
No full textFig. 1. NMDS ordination biplots of bird species (e.g., sp1) that show a significant difference in their densities between less and highly degraded forest with the habitat variables (text) superimposed. Bird species code: (sp1) yellow-bellied bulbul Alophoixus phaeocephalus; (sp2) hairy-backed bulbul Tricholestes criniger; (sp3) green iora Aegithina viridissima; (sp4) scaly-crowned babbler Malacopteron cinereum; (sp5) chestnut-rumped babbler Stachyris maculata; (sp6) rufous-tailed shama Trichixos pyrrhopygus; (sp7) blue-winged leafbird Chloropsis cochincinensis; (sp8) greater racket-tailed drongo Dicrurus paradiseus; (sp9) short-tailed babbler Malacocincla malaccensis; (sp10) black-capped babbler Pellorneum capistratum; (sp11) blue-eared barbet Psilopogon duvaucelii; (sp12) brown barbet Calorhamphus hayii; (sp13) black-headed bulbul Pycnonotus atriceps; (sp14) spectacled bulbul Pycnonotus erythropthalmos; (sp15) olive-winged bulbul Pycnonotus plumosus; (sp16) cream-vented bulbul Pycnonotus simplex; (sp17) sooty-capped babbler Malacopteron affine; (sp18) fluffybacked tit-babbler Macronous ptilosus; (sp19) purple-naped sunbird Hypogramma hypogrammicum.Published as part of Marthy, William, Clough, Yann & Tscharntke, Teja, 2017, Assessing the potential for avifauna recovery in degraded forests in Indonesia, pp. 35-48 in Raffles Bulletin of Zoology 65 on page 39, DOI: 10.5281/zenodo.535584
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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