1,721,180 research outputs found
FIGURE 1 in Three new species of Paratanaoidea (Crustacea, Tanaidacea) from the South China Sea
No full textFIGURE 1. Map of the South China Sea. The star symbols show the three collection sites and the present species: 1) Alloleptochelia falciformes sp. nov.; 2) Kalloleptochelia multiarticulata sp. nov.; 3) Paranesotanais incisus sp. nov..Published as part of <i>Tzeng, You-Wei, Wei, Chih-Lin, Ma, Lin & Li, Xinzheng, 2023, Three new species of Paratanaoidea (Crustacea, Tanaidacea) from the South China Sea, pp. 1-30 in Zootaxa 5375 (1)</i> on page 3, DOI: 10.11646/zootaxa.5375.1.1, <a href="http://zenodo.org/record/10170958">http://zenodo.org/record/10170958</a>
Biodiversity–ecosystem functioning relationships in long-term time series and palaeoecological records: deep sea as a test bed
No full textThe link between biodiversity and ecosystem functioning (BEF) over long temporal scales is poorly understood. Here, we investigate biological monitoring and palaeoecological records on decadal, centennial and millennial time scales from a BEF framework by using deep sea, soft-sediment environments as a test bed. Results generally show positive BEF relationships, in agreement with BEF studies based on present-day spatial analyses and short-term manipulative experiments. However, the deep-sea BEF relationship is much noisier across longer time scales compared with modern observational studies. We also demonstrate with palaeoecological time-series data that a larger species pool does not enhance ecosystem stability through time, whereas higher abundance as an indicator of higher ecosystem functioning may enhance ecosystem stability. These results suggest that BEF relationships are potentially time scale-dependent. Environmental impacts on biodiversity and ecosystem functioning may be much stronger than biodiversity impacts on ecosystem functioning at long, decadal–millennial, time scales. Longer time scale perspectives, including palaeoecological and ecosystem monitoring data, are critical for predicting future BEF relationships on a rapidly changing planet.link_to_subscribed_fulltex
Kalloleptochelia Gutu 2016
No full textKey to the adult males of the species of <i>Kalloleptochelia</i> (modified and updated from Guţu 2016) <p> 1 Antennule flagellum ten-articled or more; uropod exopod two-articled...................... <b> <i>K. multiarticulata</i> sp. nov.</b> </p> <p> 1a Antennule flagellum eight-articled or less; uropod exopod one-articled.......................................... <b>2</b></p> <p> 2 Uropod endopod five-articled........................................................................... <b>3</b></p> <p> 2a Uropod endopod six-articled............................................................................ <b>4</b></p> <p> 3 Antennule flagellum six-articled, as long as peduncle............................................... <i>K. pauxilla</i></p> <p> 3a Antennule flagellum eight-articled, shorter than peduncle........................................... <i>K. tenuicula</i></p> <p> 4 Pereopod-1 propodus about six times longer than wide, dactylus plus unguis longer than propodus............ <i>K. robusta</i></p> <p> 4a Pereopod-1 propodus about four times longer than wide, dactylus plus unguis as long as propodus........... <i>K. maiorina</i></p>Published as part of <i>Tzeng, You-Wei, Wei, Chih-Lin, Ma, Lin & Li, Xinzheng, 2023, Three new species of Paratanaoidea (Crustacea, Tanaidacea) from the South China Sea, pp. 1-30 in Zootaxa 5375 (1)</i> on page 19, DOI: 10.11646/zootaxa.5375.1.1, <a href="http://zenodo.org/record/10170958">http://zenodo.org/record/10170958</a>
Kalloleptochelia Gutu 2016
No full textGenus <i>Kalloleptochelia</i> Guţu, 2016 <p> <b>Type species</b>. <i>Kalloleptochelia robusta</i> Guţu, 2016</p> <p> <b>Remarks.</b> Guţu (2016) established the genus <i>Kalloleptochelia</i>, which comprises four species: <i>K. maiorina</i> Guţu, 2016 (Réunion Island, western Indian Ocean), <i>K. pauxilla</i> Guţu, 2016 (Langkawi Island, Malaysia), <i>K. robusta</i> (Bunaken Island, Indonesia), and <i>K. tenuicula</i> (Makkaveeva, 1968) (Cuba). In these publications, only the male characteristics were described, although the first morphological description of the female <i>Kalloleptochelia</i> species was probably mentioned in the redescription of <i>Leptochelia tenuicula</i> (<i>K. tenuicula</i>) from Martinique Island by Guţu (2011). However, doubts were later raised regarding that particular species (Guţu 2016: 132).</p> <p> According to Guţu (2016: 132), the males of <i>Kalloleptochelia</i> species share similarities with those of <i>Alloleptochelia</i>, but they can be distinguished by certain distinct features: 1) the antennule peduncle article-1 is no longer than the carapace (longer than the carapace in <i>Alloleptochelia</i> species); 2) the cheliped is shorter than the body (at least as long as the body in <i>Alloleptochelia</i> species); 3) both the fixed finger and the dactylus of the cheliped have numerous denticles along the incisive margin (only a proximal apophysis, a few proximal denticles or smooth on fixed finger in <i>Alloleptochelia</i> species).</p>Published as part of <i>Tzeng, You-Wei, Wei, Chih-Lin, Ma, Lin & Li, Xinzheng, 2023, Three new species of Paratanaoidea (Crustacea, Tanaidacea) from the South China Sea, pp. 1-30 in Zootaxa 5375 (1)</i> on page 14, DOI: 10.11646/zootaxa.5375.1.1, <a href="http://zenodo.org/record/10170958">http://zenodo.org/record/10170958</a>
Modeled environmental data-layers and changes predicted under RCP2.6, 4.5 and 8.5 for the deep Atlantic Ocean
No full textThe data layers provided show current values for seawater temperature, pH, calcite and aragonite saturation (%), oxygen concentration, and particulate organic carbon (POC) flux to the seafloor at different depths (500, 1000, 2000, 3000, and 4000m) at the present day (1951-2000) and changes in these variables expected between 2041-2060 and 2081-2100 under different RCP scenarios. The data layers were generated following the methods described in Levin et al. (2020). In short, in 2019, we obtained the present day and future ocean projections for the different years which were compiled from all available data generated by Earth Systems Models as part of the Coupled Model Inter-comparison Project Phase 5 (CMIP5) to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Three Earth System Models, including GFDL‐ESM‐2G, IPSL‐CM5A‐MR, and MPI‐ESM‐MR were collected and multi-model averages of temperature, pH, O2 , export production at 100-m depth (epc100), carbonate ion concentration (co3), and carbonate ion concentration for seawater in equilibrium with aragonite (co3satarg) and calcite (co3satcalc) were calculated. The epc100 was converted to export POC flux at the seafloor using the Martin curve (Martin et al., 1987) following the equation: POC flux = export production*(depth/export depth)0.858. The export depth was set to 100 m, and the water depth using the ETOPO1 Global Relief Model (Amante and Eakins, 2008). Seafloor aragonite and calcite saturation were computed by dividing co3 by co3satarg and co3satcalc. All variableswere reported as the inter-annual mean projections between 1951-2000, 2041-2060, and 2081-2100. The data for calcite and aragonite saturation can be found in Morato et al. (2020)
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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