Search results for "Luvia"

Interpretación paleohidrológica y geoarqueológica del substrato romano y musulmán de la ciudad de Valencia

1990

SE ESTUDIA EL REGISTRO GEOARQUEOLOGICO, ROMANO Y MUSULMAN DE LA CIUDAD DE VALENCIA. SE OBSERVAN CUATRO NIVELES DE SEDIMENTACION DIFERENCIADOS: UN SUELO HIDROMORFO DE EPOCA PRERROMANA, LIMOS Y ARENAS DE DESBORDAMIENTO EN FACIES OVERBANK Y CREVASSE SPLAY DEL PERIODO ROMANO, ARCILLAS Y LIMOS ORGANICOS TARDO ROMANOS Y, FINALMENTE, SECUENCIAS VERTICALES DE SEDIMENTOS DE GRANO MUY GRUESO EN FACIES DE BARRAS Y DEPOSITOS DE CANAL DE EPOCA MUSULMANA. LOS DEPOSITOS DE INUNDACION DE EPOCA HISTORICA CORRESPONDEN A FASES DE PROGRADACION CONTINENTAL EN LA LLANURA COSTERA. (A)

Filtration of Nordic recirculating aquaculture system wastewater: Effects on microalgal growth, nutrient removal, and nutritional value

2021

Abstract Microalgal bioremediation of recirculating aquaculture system (RAS) wastewater represents an alternative for wastewater treatment with the potential to generate valuable biomass. This study evaluated the effects of removing biological contamination and suspended solids from Nordic area RAS wastewater through filtration with 0.45 μm filters on the performance and nutritional value of microalgae. All three tested green microalgae (Haematococcus pluvialis, Monoraphidium griffithii, and Selenastrum sp.) were able to grow in raw (unfiltered) and filtered RAS wastewater. Cultivation in raw RAS wastewater decreased the ω-3 and ω-6 fatty acid content of H. pluvialis as compared to filtered…

Soil Bacterial Community Along an Altitudinal Gradient in the Sumaco, a Stratovolcano in the Amazon Region

2022

Our study is a pioneering exploration of the microbiome in the soil of the Sumaco stratovolcano and an assessment of the effects of an elevational gradient and related physicochemical soil parameters on richness and community structure. The Sumaco, as an isolated Amazonian stratovolcano, may be among one of the least studied ecosystems in Ecuador and perhaps the Amazon region. Universal patterns remain unresolved or available information inconclusive to establish a supported consensus on general governing processes by which elevation and its associated environmental gradients may determine the microbial richness and community structure. We tested a recent proposal on how microbial diversity…

Vegetation of taluses and screes of the high montane and alpine zone in the Pamir Alai Mountains (Tajikistan, Middle Asia)

2015

This paper presents the results of phytosociological research on scree vegetation of the Pamir Alai Mts. In total, 128 phytosociological relevés were made during field studies conducted in 2012–2014, applying the Braun-Blanquet method. Plant communities of mobile and fairly stabilised scree of colluvial cones, aprons and fans, inhabiting mainly the high montane and alpine zone in several ranges (e.g.the Zeravshan, Hissar, Hazratishoh, Darvaz, Rushan and Vanch Mts) are herein described. A hierarchical syntaxonomic synopsis of scree communities at montane and alpine elevations in the Pamir Alai Mts is provided. The collected vegetation samples represent the majority of the variations among th…

Vegetation Diversity of Screes and Taluses of The Pamir and South-Western Tian Shan in Middle Asia

2021

AbstractThis paper presents the results of phytosociological research on scree vegetation of the Pamir and south-western Tian Shan. We collected 222 phytosociological relevés during field studies conducted in 2015–2019, applying the Braun-Blanquet approach. We identified 21 plant communities on mobile and stabilized screes of colluvial cones, aprons and fans, inhabiting mainly the montane and alpine belts in several ranges (e.g. Peter the First, Alichur, Shugnan, Shachdarian, Darvaz, Rushan, Vanch, Fergana, Kyrgyz and Terskey ranges). As a result we provide the first comprehensive hierarchical syntaxonomic synopsis of scree communities at montane and alpine elevations in the eastern Middle …

Taphonomy of the vertebrate bone beds from the Klūnas fossil site, Upper Devonian Tērvete Formation of Latvia

2012

Combined sedimentological and taphonomical study of the siliciclastic sequence of the Tērvete Formation in the stratotypical area was aimed at revealing the formation of the three oryctocoenoses discovered and related structural and textural features of the deposits, as well as at detailed observation of the taphonomical peculiarities of the obtained palaeontological material. The fossil vertebrate assemblage is represented by 14 taxa comprising placoderms, acanthodians, sarcopterygians and actinopterygians. The three oryctocoenoses, first recognized in 2010, differ in the proportions of repeatedly buried material, in the number and degree of preservation of small and fragile skeletal eleme…

Three-dimensional evolution of the Keuper of the Paris basin based on detailed isopach maps of the stratigraphic cycles: tectonic influences

1997

Detailed isopach maps of the stratigraphic cycles of the Keuper of the Paris basin are used to reconstruct the 3D evolution of the basin cycle by cycle and to investigate the influence of tectonic movements. The major base-level cycles record variations in the rate of subsidence in time and space. The area of greatest subsidence, which was confined to the east of the basin during the Scythian–Carnian cycle, shifted northwestwards during the Carnian–Liassic cycle. Within the “Marnes irisees inferieures”, the E–W faults abruptly limited the extent of salt deposits to the north and south by forming a “corridor” where subsidence was greater. The westward shift of areas of subsidence induced by …

GOVERNARE I TERRITORI FLUVIALI IL CONTRATTO DI FIUME STRUMENTO PER UNA GESTIONE INTEGRATA A SCALA DI BACINO DOTTORANDA: Maria Laura Scaduto TUTOR ITA…

2012

Luminescence Dating of Fluvial Deposits in the Rock Shelter of Cueva Antón, Spain

2015

Abstract The fluvial sediments at Cueva Antón, a Middle Palaeolithic rock shelter located in the valley of the River Mula (Southeast Spain), produced abundant lithic assemblages of Mousterian affinities. Radiocarbon dates are available for the upper part of the archaeological succession, while for the middle to lower parts chronometric data have been missing. Here we present luminescence dating results for these parts of the succession. Quartz OSL on small aliquots and single grain measurements yield ages ranging from 69 ± 7 ka to 82 ± 8 ka with a weighted mean of 72 ± 4 ka for sub-complexes AS2 to AS5. Equivalent dose estimates from large aliquots were highest and inconsistent with those f…

Beaches in Valencian Coast

2018

The main factors that determined the Valencian beaches characteristics are the configuration of relief structures; fluvial sediment supply; low tidal range; the predominance of low energy waves; scarcity of big storms; longshore littoral drift; and human action. There is a significant prevalence of sandy beaches. Nevertheless, both at the northern part of the Gulf of Valencia and in the structural segment, between the Cape Sant Antoni and Alicante city, pebble and gravel beaches are predominant. Most of the Valencian beaches have experienced significant morphological changes during the last decades due to the human interventions -voluntary or involuntary- in the coastal system. The implemen…