A new Middle Pleistocene interglacial sequence from Måløv, Sjælland, Denmark

Interglacial deposits in Denmark have traditionally been referred to the Cromerian complex (Hareskovian), Holsteinian or Eemian stages. However, based on studies of sediment cores from the deep sea many more than three Quaternary interglacials have been documented, and in other parts of north-western Europe it is becoming increasingly clear that the on-shore Quaternary sequences are much more complex than previously believed. Interglacial deposits are characterised by plant and animal remains indicating longer periods with climatic conditions similar to or warmer than today, whereas interstadial deposits were formed during shorter time spans and usually contain remains of relatively cold-adapted, arctic or sub-arctic species. Interglacial and interstadial deposits can be dated more or less precisely, and thus provide information about the relative age of glacial deposits

Characterizing ecoregions in Argentinian patagonia using extant continental ostracods

In order to characterize Patagonian (Argentina) ecoregions using non-marine ostracods, their associations in 69 environments were assessed. Twenty eight taxa were recorded, including 12 endemic of the Neotropical region. Our results indicate that Patagonian ostracods are mainly influenced by electrical conductivity (EC), altitude, pH, and temperature; and shows a correlation with Argentinian ecoregions. Assemblage I is composed of sites located at high altitude in the Andean Patagonian forest ecoregion. Host waters have low temperature, EC and pH, and support as representative species Cypris pubera, Eucypris virens, Bradleystrandesia fuscata, Tonacypris lutaria and Amphicypris nobilis. Assemblage II, related to mid-altitude environments in the Patagonian Steppe ecoregion, thrived in waters with moderate to high EC, and alkaline pH values. Dominant species includes Limnocythere rionegroensis, L. patagonica, E. virgata, Riocypris whatleyi, Riocypris sarsi, Newnhamia patagonica, Kapcypridopsis megapodus, Ilyocypris ramirezi and Penthesinelula incae. Assemblage III inhabited environments within Monte and Espinal ecoregions, situated in the eastern part of the study area at low altitude, EC moderate and temperate waters, supporting Heterocypris hyalinus, Amphicypris argentinensis, Sarscypridopsis aculeata, Cypridopsis vidua, Herpetocypris intermedia and Chlamidotheca incisa. Our results indicates that Argentinian Patagonia hosts a diverse ostracod fauna and highlights their capacity as proxies in ecological and palaeoenvironmental studies.Fil: Cusminsky, Gabriela Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Coviaga, Corina Anabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Ramos, Lorena Yésica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Perez, Patricia Andrea. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Schwalb, Antje. Technische Universität Braunschweig; AlemaniaFil: Markgraf, Vera. University of Colorado; Estados UnidosFil: Ariztegui, Daniel. Universidad de Ginebra; SuizaFil: Viehberg, Finn. Universitat zu Köln; Alemania. Universität Greifswald; AlemaniaFil: Alperin, Marta Ines. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentin

Совершенствование системы стимулирования персонала

Объект исследования - ООО "Партнеры-Ноябрьск". Предмет исследования – система стимулирования персонала на предприятии. Цель ВКР ? совершенствование системы стимулирования персонала на предприятии для активизации трудового потенциала на повышение производительности труда работников. В соответствии с поставленной целью решены следующие задачи: осуществлен обзор основных научных подходов к стимулированию трудовой активности сотрудника; проведен анализ процессов стимулирования трудовой активности сотрудника на примере ООО "Партнеры Ноябрьск"; разработаны основные направления совершенствования стимулирования трудовой активности сотрудника предприятия ООО "Партнеры-Ноябрьск".The object of the study - LLC "Partners-Noyabrsk." Subject of research - the system of incentives for staff in the enterprise. The purpose of the WRC is to improve the system of incentives for personnel in the enterprise to enhance the labor potential to increase the productivity of workers. In accordance with the goal, the following tasks have been accomplished: a review of the main scientific approaches to stimulating employee labor activity has been carried out; an analysis of the processes of stimulating employee labor activity was carried out using the example of Partners Noyabrsk LLC; developed the main directions of improving the stimulation of labor activity of the employee of the company Partners-Noyabrsk

Recurrent explosive eruptions from a high risk Main Ethiopian Rift volcano throughout the Holocene

Corbetti caldera is the southernmost large volcanic system in Ethiopia, and has been categorized at the highest level of uncertainty in terms of hazard and risk. Until now, the number and frequency of past explosive eruptions at Corbetti has been unknown, due to limited studies of frequently incomplete and patchy outcrop sequences. Here we use volcanic ash layers preserved in sediments from three Main Ethiopian Rift lakes to provide the first detailed record of volcanism for the Corbetti caldera. We show that lake sediments yield more comprehensive, stratigraphically-resolved dossiers of long-term volcanism than often available in outcrop. Our eruptive history for Corbetti spans the last 10 k.y. and reveals eruptions at an average return period of ~900 years. The threat posed by Corbetti has, until now, been underestimated. Future explosive eruptions, similar to those of the past 10 k.y. would blanket nearby Awassa and Shashamene, currently home to ~260,000 people, with pumice fall deposits and would have significant societal impacts. A lake sediment tephrostratigraphic approach shows significant potential for application throughout the East African Rift system, and will be essential to better understanding volcanic hazards in this rapidly developing region.</p

Distribution and ecology of freshwater ostracods from northern patagonia: An approach

There are only a few studies about the ostracod faunal assemblages and their environmental requirements from Patagonia (e.g. CUSMINSKY et al., 2011; RAMÓN MERCAU et al., 2012). Here we present the results of a survey of thirteen water bodies (streams, springs, temporary habitats) in Northern Patagonia (39° 52’ – 41°50’ S; 70°36’ – 71°27’ W) and their comparison with those of previous studies in the earstern Patagonia. The goal of this research is to enhance our understanding of the regional Patagonian ostracoda fauna and evaluate the relationship between ostracod species and physical and chemical (depth, temperature, pH, conductivity, dissolved oxygen concentration, seston and main ions) parameters of host waters along a W-E precipitation gradient (ranging from 1200 to 160mm/annually). To date, seven species were identified: Amphicypris nobilis Sars 1901, Bradleystrandesia fuscata (Jurine, 1820), Cypridopsis vidua (O. F. Müller, 1776), Cypris pubera O. F. Müller 1776, Eucypris virens (Jurine, 1820), Heterocypris incongruens (Ramdohr, 1808) and Tonnacypris lutaria (Koch, 1838). The more frequent species were T. lutaria and E. virens, while A. nobilis and C. vidua were only found in one site. Males of A. nobilis were found while the other species were represented only by females. The environment of this fauna is related to low conductivity and salinity in the water. Conversely, previous studies in the easternmost area of Patagonia have shown different fauna such us Penthesinelula incae (Delachaux, 1928), Potamocypris smaradigma (Vávra, 1891), Ilyocypris ramirezi Cusminsky and Whatley, 1996, Limnocythere patagonica Cusminsky and Whatley, 1996, Eucypris fontana (Graf, 1931), Kapcypridopsis megapodus Cusminsky et al. 2005 and Limnocythere rionegroensis, Cusminsky and Whatley, 1996 living in comparatively higher conductivity (CUSMINSKY et al., 2011). The latter suggest that the decreasing precipitation trend towards eastern Patagonia is reflected in the distribution of different ostracod fauna association. On the other hand, new distributions of cosmopolitan species are present, spreading out their geographical distribution to the Neotropical region (MARTENS et al., 2008). Some of the species such us C. pubera, E. virens and B. fuscata have been also described in the Neartic region, suggesting that birds could be responsible to their dispersion. However, the mode of dispersion of T. lutaria in this region is still an open question.Fil: Coviaga, Corina Anabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Cusminsky, Gabriela Catalina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Perez, Alejandra Patricia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Biodiversidad y Medioambiente. Universidad Nacional del Comahue. Centro Regional Universidad Bariloche. Instituto de Investigaciones en Biodiversidad y Medioambiente; ArgentinaFil: Diaz, Analia Roxana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; ArgentinaFil: Schwalb, Antje. Technische Universitat Carolo Wilhelmina Zu Braunschweig. Iinstitut fur Geosysteme und Bioindikation.; AlemaniaFil: Alperin, Marta Ines. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Estadística; ArgentinaFil: Viehberg, Finn. University of Cologne.Institute of Geology and Mineralogy; AlemaniaFil: Whatley, Robin. University Aberystwyth.Institute of Earth Studies.Department of Geology; Reino UnidoFil: Ariztegui, Daniel. University of Geneva.Department of Earth Sciences; SuizaFil: Markgraf, Vera. University of Colorado; Estados Unidos. Northern Arizona University.; Estados Unido

Holocene glacier fluctuations and environmental changes in sub-Antarctic South Georgia inferred from a sediment record from a coastal inlet

The sub-Antarctic island of South Georgia provides terrestrial and coastal marine records of climate variability, which are crucial for the understanding of the drivers of Holocene climate changes in the sub-Antarctic region. Here we investigate a sediment core (Co1305) from a coastal inlet on South Georgia using elemental, lipid biomarker, diatom and stable isotope data to infer changes in environmental conditions and to constrain the timing of Late glacial and Holocene glacier fluctuations. Due to the scarcity of terrestrial macro-fossils and relict organic matter in the sediments, age control was obtained by compound-specific radiocarbon dating of mostly marine derived n-C16 fatty acids. A basal till layer recovered in Co1305 was likely deposited during an advance of local glaciers during the Antarctic cold eversal. After glacier retreat an oligotrophic lake occupied the site, which transitioned to a marine inlet around 8.0±0.9 ka due to relative sea level rise. From 7.0±0.6 to 4.0±0.4 ka reduced vegetation coverage in the catchment as well as high siliciclastic input and deposition of ice rafted debris indicate glacier advances in the terrestrial catchment and likely in the adjacent fjord. A second, less extensive period of glacier advances occurred in the late Holocene, after 1.8±0.3 ka

Using multiple chronometers to establish a long, directly-dated lacustrine record:Constraining &gt;600,000 years of environmental change at Chew Bahir, Ethiopia

Despite eastern Africa being a key location in the emergence of Homo sapiens and their subsequent dispersal out of Africa, there is a paucity of long, well-dated climate records in the region to contextualize this history. To address this issue, we dated a ∼293 m long composite sediment core from Chew Bahir, south Ethiopia, using three independent chronometers (radiocarbon, 40Ar/39Ar, and optically stimulated luminescence) combined with geochemical correlation to a known-age tephra. The site is located in a climatically sensitive region, and is close to Omo Kibish, the earliest documented Homo sapiens fossil site in eastern Africa, and to the proposed dispersal routes for H. sapiens out of Africa. The 30 ages generated by the various techniques are internally consistent, stratigraphically coherent, and span the full range of the core depth. A Bayesian age-depth model developed using these ages results in a chronology that forms one of the longest independently dated, high-resolution lacustrine sediment records from eastern Africa. The chronology illustrates that any record of environmental change preserved in the composite sediment core from Chew Bahir would span the entire timescale of modern human evolution and dispersal, encompassing the time period of the transition from Acheulean to Middle Stone Age (MSA), and subsequently to Later Stone Age (LSA) technology, making the core well-placed to address questions regarding environmental change and hominin evolutionary adaptation. The benefits to such studies of direct dating and the use of multiple independent chronometers are discussed. Highlights • Four independent dating methods applied to ∼293 m lake core from southern Ethiopia. • Reveals 620 ka high-resolution sedimentary record near key fossil hominin sites. • Mean accumulation rate of 0.47 mm/a comparable to other African lacustrine sediments. • Accumulation rate fell to 0.1 mm/a during MIS 2, likely due to reduced sediment supply. • Use of multiple independent chronometers is a powerful approach in lake settings

Characterizing ecoregions in Argentinian Patagonia using extant continental ostracods

In order to characterize Patagonian (Argentina) ecoregions using non-marine ostracods, their associations in 69 environments were assessed. Twenty eight taxa were recorded, including 12 endemic of the Neotropical region. Our results indicate that Patagonian ostracods are mainly influenced by electrical conductivity (EC), altitude, pH, and temperature; and shows a correlation with Argentinian ecoregions. Assemblage I is composed of sites located at high altitude in the Andean Patagonian forest ecoregion. Host waters have low temperature, EC and pH, and support as representative species Cypris pubera, Eucypris virens, Bradleystrandesia fuscata, Tonacypris lutaria and Amphicypris nobilis. Assemblage II, related to mid-altitude environments in the Patagonian Steppe ecoregion, thrived in waters with moderate to high EC, and alkaline pH values. Dominant species includes Limnocythere rionegroensis, L. patagonica, E. virgata, Riocypris whatleyi, Riocypris sarsi, Newnhamia patagonica, Kapcypridopsis megapodus, Ilyocypris ramirezi and Penthesinelula incae. Assemblage III inhabited environments within Monte and Espinal ecoregions, situated in the eastern part of the study area at low altitude, EC moderate and temperate waters, supporting Heterocypris hyalinus, Amphicypris argentinensis, Sarscypridopsis aculeata, Cypridopsis vidua, Herpetocypris intermedia and Chlamidotheca incisa. Our results indicates that Argentinian Patagonia hosts a diverse ostracod fauna and highlights their capacity as proxies in ecological and palaeoenvironmental studies.Facultad de Ciencias Naturales y Muse

Environmental change during MIS4 and MIS 3 opened corridors in the Horn of Africa for <i>Homo sapiens</i> expansion

Archaeological findings, numerical human dispersal models and genome analyses suggest several time windows in the past 200 kyr (thousands of years ago) when anatomically modern humans (AMH) dispersed out of Africa into the Levant and/or Arabia. From close to the key hominin site of Omo-Kibish, we provide near continuous proxy evidence for environmental changes in lake sediment cores from the Chew Bahir basin, south Ethiopia. The data show highly variable hydroclimate conditions from 116 to 66 kyr BP with rapid shifts from very wet to extreme aridity. The wet phases coincide with the timing of the North African Humid Periods during MIS5, as defined by Nile discharge records from the eastern Mediterranean. The subsequent record at Chew Bahir suggests stable regional hydrological setting between 58 and 32 kyr (MIS4 and 3), which facilitated the development of more habitable ecosystems, albeit in generally dry climatic conditions. This shift, from more to less variable hydroclimate, may help account for the timing of later dispersal events of AMH out of Africa