Search results for "Baltica"
showing 10 items of 21 documents
First Perigondwanan record of actinolepids (Vertebrata: Placodermi: Arthrodira) from the Lochkovian (Early Devonian) of Spain and its palaeobiogeogra…
2011
Different palaeogeographic models have been proposed for the position of Laurussia ( including Baltica) and Gondwana-derived microcontinents ( including Ibero-Armorica) during Ordovician to Late Carboniferous times. Principal differences concern the presence and duration of a large ocean, the Rheic Ocean, acting as a faunal barrier between these areas. The timing of the collision of Laurussia with Gondwana and/or Gondwana-derived terranes continues to be debated. Here we present new faunal data revealing close biogeographical relations between Ibero-Armorica ("Perigondwanan" or Gondwanan derivate terranes) and Podolia (SE margin of Baltica, in Laurussia). The placoderm assemblage found in t…
Baltijas pētnieciskās žurnālistikas centra Re:Baltica darbība sociālajos tīklos: žurnālistu un auditorijas attieksmes
2021
Bakalaura darbā analizētas pētnieciskās žurnālistikas centra Re:Baltica aktivitātes sociālajos tīklos, to efektivitāte un lietotāju attieksme pret tām. Izmantojot Sociālās atbildības teorijas pieeju, noskaidroti pētnieciskās žurnālistikas uzdevumi, savukārt definējot sociālo tīklu, viltus ziņu un dezinformācijas jēdzienus, nozīmi un problēmas, kā arī noskaidrojot Facebook lomu masu komunikācijā, konstatēti sociālo tīklu izmantošanas iemesli un to efektivitāte auditorijas sasniegšanā pētnieciskajā žurnālistikā. Ar kontentanalīzes palīdzību konstatētas galvenās publikāciju tēmas un lietotāju reakcijas uz tām, savukārt, intervējot Re:Baltica žurnālistes, atklāti iemesli aktivitātēm sociālajos …
Folkloras festivāla „Baltica" publiskā komunikācija Latvijā no 2006. līdz 2015. gadam
2015
Maģistra darba “Folkloras festivāla „Baltica” publiskā komunikācija Latvijā no 2006. līdz 2015. gadam” mērķis ir iegūt padziļinātu ieskatu starptautiskā folkloras festivāla “Baltica” publiskajā komunikācijā un noskaidrot, vai tā publiskās komunikācijas organizācija kā būtisks festivāla Baltica popularizēšanas instruments kopš 2006.gada atbilst veiksmīgas un daudzpusīgas komunikācijas kampaņas organizācijai. Šī darba teorētiskajā daļā īpaša uzmanība tikusi pievērsta tādiem jēdzieniem kā kultūra un radošums kā cilvēku tradicionālās kultūras izpausmju pamats, kultūras un radošās industrijas kā kultūras mantojuma realizētājs mūsdienās, mantojuma jēdziens un tā tipi, kā arī publiskās komunikācij…
Aproximación a las comunidades de carófitos que existieron en la albufera de valencia a partir del estudio de las oósporas del sedimento
2009
14 páginas, 8 figuras, 3 tablas.
New records and observations to the Characean flora (Charales, Charophyceae) of Sicily (Italy)
2019
New records to the Characean flora of Sicily are presented. Five species (Chara baltica, C. conimbrigensis, C. oedophylla, Nitella gracilis, Tolypella salina) are new to Sicily, two of them being also new to Italy (Chara conimbrigensis, C. oedophylla). Two species are confirmed for Sicily (Chara aspera, Nitella opaca), three (Chara braunii, C. canescens, Nitella capillaris) are rare taxa. The Characean flora of Sicily, updated with these records, currently includes 25 species, distributed in four genera: Chara (13 species), Nitella (eight species), Tolypella (three species) and Lamprothamnium (one species).
Palaeozoogeographical connections of the Devonian vertebrate communities of the Baltica Province. Part II. Late Devonian
2010
Abstract Late Devonian vertebrate communities within the Baltica zoogeographical Province are analysed for intra- and interprovincial connections. Components within the category of provincial endemics are used to assign the communities to a particular zoogeographical province. Marine and continental, presumably freshwater types of vertebrate dispersal are outlined. During the Late Devonian marine dispersal is displayed by ptyctodonts, struniiforms, and some dipnoans, and continental dispersal by psammosteids, acanthodians, and some arthrodires. Isolation of communities is reflected by predominance of local and provincial endemics; the majority of polydemics and cosmopolitans records wider c…
Proposal of a reference section and point for the Cambrian Series 2-3 boundary in the Mediterranean subprovince in Murero (NE Spain) and its intercon…
2011
The classical lower-middle Cambrian boundary is approximately equivalent with the boundary of the Cambrian Series 2 and 3, which is now in the process of definition by the International Subcommission on Cambrian Stratigraphy. Currently, there are two oryctocephalid trilobite species first appearance data (FAD) that are suggested as possible markers of this level: Ovatoryctocara granulata Tchernysheva, 1962 and Oryctocephalus indicus (Reed, 1910), respectively. Until now neither of these two species has been recorded in the Mediterranean subprovince or Baltica. As a result, in these regions a level potentially correlating with either the FAD of Ovatoryctocara granulata or Oryctocephalus indi…
Long-term changes of river discharge regime in Latvia
2008
The study of changes in river discharge is important for regional climate variability characterization and for development of an efficient water resource management system. The hydrological regime of rivers and their long-term changes in Latvia were investigated. Four major types of river hydrological regimes, which depend on climatic and physicogeographic factors, were characterized. These factors are linked to the changes observed in river discharge. Periodic oscillations of discharge, and low- and high-water flow years are common for the major rivers in Latvia. A main frequency of river discharge regime changes of about 20 and 13 years was estimated for the studied rivers. A significant …
Tectonic models for accretion of the Central Asian Orogenic Belt
2007
The Central Asian Orogenic Belt ( c . 1000–250 Ma) formed by accretion of island arcs, ophiolites, oceanic islands, seamounts, accretionary wedges, oceanic plateaux and microcontinents in a manner comparable with that of circum-Pacific Mesozoic–Cenozoic accretionary orogens. Palaeomagnetic and palaeofloral data indicate that early accretion (Vendian–Ordovician) took place when Baltica and Siberia were separated by a wide ocean. Island arcs and Precambrian microcontinents accreted to the active margins of the two continents or amalgamated in an oceanic setting (as in Kazakhstan) by roll-back and collision, forming a huge accretionary collage. The Palaeo-Asian Ocean closed in the Permian with…
Ordovician echinoderms from the Tabas and Damghan regions, Iran: palaeobiogeographical implications
2005
Abstract Two echinoderm assemblages are described in the Middle Ordovician of Iran (Darriwilian). The Simeh Kuh section (Damghan area, eastern Alborz range) has yielded a rich and diverse blastozoan fauna consisting of fistuliporite (Echinosphaerites, Heliocrinites) and dichoporite rhombiferans (cheirocrinids indet., hemicosmitids indet.), as well as aristocystitid (Sinocystis) and sphaeronitid diploporites (Glyptosphaerites, Tholocystis). Heliocrinites, cheirocrinids, hemicosmitids, Glyptosphaerites, and Tholocystis are reported for the first time in the Ordovician of Iran. A less diverse assemblage was collected in the Shirgesht section (Tabas area, Derenjal Mountains), and represents the…