131,097 research outputs found
FIG. 2 in Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans)
No full textFIG. 2.—The eight lunar phases considered in this study and the assignment of days since new moon and days from the nearest new moon. Adapted from Grant et al. (2009).Published as part of Henrique, Rafael S. & Grant, Taran, 2019, Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans), pp. 38-46 in Herpetologica 75 (1) on page 40, DOI: 10.1655/D-18-00018.1, http://zenodo.org/record/771238
Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans)
No full textHenrique, Rafael S., Grant, Taran (2019): Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans). Herpetologica 75 (1): 38-46, DOI: 10.1655/D-18-00018.1, URL: https://bioone.org/journals/herpetologica/volume-75/issue-1/D-18-00018.1/Influence-of-Environmental-Factors-on-Short-Term-Movements-of-Butter/10.1655/D-18-00018.1.ful
FIG. 4 in Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans)
No full textFIG. 4.—Mean displacement by individuals of Leptodactŋlus latrans during each lunar phase at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul, Brazil. Each bar corresponds to a lunar phase, and bar length indicates the mean displacement of frogs (m). The new moon is positioned on the top of the figure, and the full moon is positioned at the bottom (additional details in Fig. 2).Published as part of Henrique, Rafael S. & Grant, Taran, 2019, Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans), pp. 38-46 in Herpetologica 75 (1) on page 43, DOI: 10.1655/D-18-00018.1, http://zenodo.org/record/771238
FIG. 1 in Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans)
No full textFIG. 1.—Example of Leptodactŋlus latrans habitat at the Agronomic Experimental Station of the Federal University of Rio Grande do Sul, Brazil. The surveyed wetlands were each surrounded by pasture and underbrush matrices and all sited in a former Atlantic Forest area. A color version of this figure is available online.Published as part of Henrique, Rafael S. & Grant, Taran, 2019, Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans), pp. 38-46 in Herpetologica 75 (1) on page 39, DOI: 10.1655/D-18-00018.1, http://zenodo.org/record/771238
Geochemistry of volcanic fluids
No full textThis special issue is dedicated to Yuri Taran's outstanding
contributions to gas geochemistry that began in the early
1980s with his work on deuterium and 18O compositions of
geothermal waters in the Mutnovsky (Kamchatka) region and
continues to this day with work on the Kamchatka volcanic
volatile budget, carbon isotopes of hydrocarbons, and new
insights into the geochemistry of El Chichón volcano,
Chiapas. Yuri has contributed greatly to the field of volcanic
gas geochemistry and was the first to recognize the distinct
deuterium and oxygen isotopic composition of fumarole
condensates from volcanoes in Kamchatka (Taran et al.
1987a). The shift in δD and δ18O to significantly heavier
values compared to local meteoric water led Yuri to introduce
the term “andesitic water” (Taran et al. 1989a, b) which has
since been recognized at subduction zone volcanoes globally.
This distinct isotopic composition is evidence that volcanoes
release water that ultimately originates as subducted seawater
and is recycled through the mantle wedge back to the earth's
surface. Yuri's early work on the gas emissions from
Kamchatka and Kurile Islands volcanoes also included the
development and testing of gas geothermometers (Taran
1986) and investigating hydrothermal alteration using isotopic
data (Taran et al. 1987b). His curiosity remained focused
on the isotope systematics of volcanic gases discharging from
Kamchatka and the Kuriles through the late 1980s and 1990s
with publications on the gas compositions of Klyuchevskoi
(Taran et al. 1991), Mutnovsky (Taran et al. 1992),
Avachinsky and Koryaksky (Taran et al. 1997). Yuri was
involved in the discovery of a pure and unique rhenium
mineral on Kudryavy volcano (Korzhinsky et al. 1994) and
provided one of the most detailed chemical studies of high
temperature (up to 950°C) fumaroles to date of any volcano
(Taran et al. 1995). His 1995 paper on Kudryavy remains
highly cited and provides the highest quality volcanic gas
data which also include trace elements from a subduction
zone. Such data are crucial when we attempt to interpret
lower temperature volcanic gas compositions or calculate rare
metal fluxes from volcanoes worldwide. His most recent
publication on Kamchatka-Kurile volcanic emissions provides
a detailed analysis of the total gas flux from these
volcanoes (Taran 2009).Published369-3711.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive2.4. TTC - Laboratori di geochimica dei fluidiJCR Journalreserve
ENEPO: EU Eastern Neighbourhood - Economic Potential and Future Development
No full textThe purpose of this paper is to measure and analyse how intensively CIS countries apply non-tariff barriers (NTBs) to restrict foreign trade in regard to certain products and total trade. Five CIS countries were selected for this analysis: Ukraine, the Russian Federation, Moldova, Belarus, and the Kyrgyz Republic. We first considered measurement methods usually applied to NTBs, reviewed other studies measuring NTBs in CIS countries, and then described our own findings on the matter. This analysis was made in the framework of the EU Eastern Neighbourhood: Economic Potential and Future Development (ENEPO) project seeking to examine different aspects of the European Union's relations with its neighbours to the East.non-tariff barriers, CIS countries, trade policy
Rorippetum dogadovae-palustris (Bidentetea tripartitae), a New Association from the Ob River Floodplain (Kaibasovo Key Area, Tomsk Region, Russia)
No full textРастительные сообщества союза Chenopodion rubri (Tx. in Poli et J. Tx. 1960) Hilbig et
Jage 1972 (Bidentetalia tripartitae Br.-Bl. et Tx. ex Klika et Hadač 1944, Bidentetea tripartitae Tx. et al.
ex von Rochow 1951) в Сибири не изучены. В статье дан оригинальный диагноз западносибирской
ассоциации Rorippetum dogadovae-palustris
Taran ass. nov. (Chenopodion rubri). Ассоциация
изучена в естественных экотопах на берегах реки Оби на южной границе подзоны южной
тайги. Диагностические виды (д.в.) ассоциации: Rorippa dogadovae и Chenopodium acerifolium.
Ассоциация включает две субассоциации: Rorippetum dogadovae-palustris
typicum и R. d.-p.
sonchetosum arvensis Taran subass. nov. (д.в.: Sonchus arvensis, Poa palustris). В ценозах субасс.
R. d.-p. typicum содоминируют Rorippa palustris и Rorippa dogadovae, среднее видовое богатство –
26 видов на описание, средняя площадь описания – 17 м2. В ценозах субассоциации R. d.-p.
sonchetosum arvensis содоминируют Rorippa palustris и Chenopodium rubrum, среднее видовое
богатство – 43 вида на описание, средняя площадь описания – 18 м2. Самобытность ассоциации
Rorippetum dogadovae-palustris
доказана при ее сравнении с ранее описанными ассоциациями
союза Chenopodion rubri. Вероятная область распространения асс. Rorippetum dogadovae-palustris
– южнотаежный и подтаежный отрезки поймы реки Оби. Щавель украинский (Rumex
ucranicus) принимается в качестве регионального дифференцирующего вида западносибирских
сообществ союза Chenopodion rubriPlant communities of the alliance Chenopodion rubri (Tx. in Poli et J. Tx. 1960) Hilbig et Jage 1972 (Bidentetalia tripartitae Br.-Bl. et Tx. ex Klika et Hadač 1944, Bidentetea tripartitae Tx. et al. ex von Rochow 1951) have not been studied in Siberia. The article presents an original diagnosis of the West Siberian association Rorippetum dogadovae-palustris Taran ass. nov. (Chenopodion rubri). The association has been studied in natural ecotopes on the banks of the Ob River at the southern boundary of the southern taiga subzone. The diagnostic species (d.s.) of the association are Rorippa dogadovae and Chenopodium acerifolium. The association includes two subassociations: Rorippetum dogadovae-palustris typicum and R. d.-p. sonchetosum arvensis Taran subass. nov. (d.s.: Sonchus arvensis, Poa palustris). In the stands of the R. d.-p. typicum subassociation, Rorippa palustris and Rorippa dogadovae predominate, the average species richness is 26 species per relevé, and the average relevé area is 17 m2. In the stands of the R. d.-p. sonchetosum arvensis subassociation, Rorippa palustris and Chenopodium rubrum predominate, the average number of species is 43 species per relevé, and the average relevé area is 18 m2. The originality of the Rorippetum dogadovae-palustris association is demonstrated by comparing it with the previously described associations of the Chenopodion rubri alliance. The probable range of the Rorippetum dogadovae-palustris association is south taiga and subtaiga sections of the Ob River floodplain. Ukrainian sorrel (Rumex ucranicus) is accepted as a regional differential species of the West Siberian communities of the Chenopodion rubri allianc
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Major and trace element geochemistry of neutral and acidic thermal springs at El Chichón volcano, Mexico. Implications for monitoring of the volcanic activity
No full textFour groups of thermal springs with temperatures from 50 to 80 °C are located on the S–SW–W slopes of El Chichón volcano, a composite dome-tephra edifice, which exploded in 1982 with a 1 km wide, 160 m deep crater left. Very dynamic thermal activity inside the crater (variations in chemistry and migration of pools and fumaroles, drastic changes in the crater lake volume and chemistry) contrasts with the stable behavior of the flank hot springs during the time of observations (1974–2005). All known groups of hot springs are located on the contact of the basement and volcanic edifice, and only on the W–SW–S slopes of the volcano at almost same elevations 600–650 m asl and less than 3 km of direct distance from the crater. Three groups of near-neutral (pH≈6) springs at SW–S slopes have the total thermal water outflow rate higher than 300 l/s and are similar in composition. The fourth and farthest group on the western slope discharges acidic (pH≈2) saline (10 g/kg of Cl) water with a much lower outflow rate (b10 l/s). Water–rock interaction modeling of main types of the El Chichón thermal waters using regular log Q/K graphs (saturation indices vs temperature) showed maximum equilibrium temperature slightly higher than 200 °C. Acidic waters are equilibrated with some clay minerals at about 120 °C. Three main sources of the salinity of thermal water are suggested on the basis of mixing plots and isotopic data: a magmatic source for CO2, boron, sulfur and a limited part of Cl; volcanic rock source for the major cations and trace elements; the oil-bearing evaporitic basement source (oil-field brine?) for NaCl, Br, a part of Ca and some trace elements. All flank thermal springs end up in the river Rio Magdalena that has a variable seasonal flow rates from 4 to 20 m3/s. Any changes in the chemistry of springs must notably change the composition of the streams draining hot springs and eventually, Rio Magdalena. A monthly geochemical monitoring of Rio Magdalena and streams draining main hot springs would be a useful tool for surveying the activity of the volcano
FIG. 3 in Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans)
No full textFIG. 3.—Particularly long-distance movements of individuals of Leptodactŋlus latrans at Agronomic Experimental Station of the Federal University of Rio Grande do Sul, Brazil. Arrows indicate the direction of the movements. When their temporary pond dried up, Frogs 3 and 5 moved to different marshy areas, and Frog 4 moved to a permanent pond. Frogs 10 and 19 moved from the same temporary pond to the same small stream. Frog 10 subsequently returned to the original temporary pond, whereas Frog 19 moved to a new permanent pond. Frogs 12 and 15 moved relatively long distances (37.6 and 31.3 m, respectively) from the same shallow area (<0.5 m) to deeper areas (1.0–1.5 m in depth) of the pond on the same night. Both frogs remained in the deeper areas for 15 d, showing little or no movement (<2 m). On another night, Frogs 12 and 15 moved 35.1 and 43.5 m, respectively, from the deeper areas to shallow areas. A color version of this figure is available online.Published as part of Henrique, Rafael S. & Grant, Taran, 2019, Influence of Environmental Factors on Short-Term Movements of Butter Frogs (Leptodactŋlus latrans), pp. 38-46 in Herpetologica 75 (1) on page 42, DOI: 10.1655/D-18-00018.1, http://zenodo.org/record/771238
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