Search results for "Trend."
showing 10 items of 394 documents
Alien flora of Europe: Species diversity, temporal trends, geographical patterns and research needs
2008
International audience; The paper provides the first estimate of the composition and structure of alien plants occurring in the wild in the European continent, based on the results of the DAISIE project (2004–2008), funded by the 6th Framework Programme of the European Union and aimed at “creating an inventory of invasive species that threaten European terrestrial, freshwater and marine environments”. The plant section of the DAISIE database is based on national checklists from 48 European countries/regions and Israel; for many of them the data were compiled during the project and for some countries DAISIE collected the first comprehensive checklists of alien species, based on primary data …
Temporal evolution of heavy rainfall in the southern West Africa coastline belt.
2018
The Southern Coastalbelt of West Africa (SCWA) is exposed to recurrent flooding. The two objectives of the study are to show thespecificity of SCWA to heavy rainfall occurrence and to determine the trends of the latter. Daily rainfall data of41 stations in the southern parts of Côte d’Ivoire, Ghana, Togo and Benin for the period 1951–2015 and ClimateHazards Group InfraRed Precipitation data were used. The approach is based on the determination (for eachstation and grid point) of the 95th centile (P95) of precipitations greater than or equal to 1 mm. Results indicatethat rainfall is heavier on the coastal belt than inland (average P95 is 65,4 and 45,5 m/day for coastal and inlandstations res…
Participation and performance trends in multistage ultramarathons--the 'Marathon des Sables' 2003-2012
2012
International audience; BackgroundThe purpose of this study was to investigate participation and performance changes in the multistage ultramarathon 'Marathon des Sables' from 2003 to 2012.MethodsParticipation and performance trends in the four- or six-stage running event covering approximately 250 km were analyzed with special emphasis on the nationality and age of the athletes. The relations between gender, age, and nationality of finishers and performance were investigated using regression analyses and analysis of variance.ResultsBetween 2003 and 2012, a number of 7,275 athletes with 938 women (12.9%) and 6,337 men (87.1%) finished the Marathon des Sables. The finisher rate in both women…
Widespread diminishing anthropogenic effects on calcium in freshwaters
2019
Calcium (Ca) is an essential element for almost all living organisms. Here, we examined global variation and controls of freshwater Ca concentrations, using 440 599 water samples from 43 184 inland water sites in 57 countries. We found that the global median Ca concentration was 4.0 mg L−1 with 20.7% of the water samples showing Ca concentrations ≤ 1.5 mg L−1 , a threshold considered critical for the survival of many Ca-demanding organisms. Spatially, freshwater Ca concentrations were strongly and proportionally linked to carbonate alkalinity, with the highest Ca and carbonate alkalinity in waters with a pH around 8.0 and decreasing in concentrations towards lower pH. However, on a temporal…
Dendro-archaeological contribution to the history of forest exploitation. The case of the Gallo-Roman settlement of Odenburg (Alsace, France) between…
2010
Long-term changes in breeding bird community of a Primeval Temperate Forest: 45 years of Censuses in the Białowieża National Park (Poland)
2022
W pracy omówiono długoterminowe trendy zmian liczebności 30 leśnych, pospolitych ptaków lęgowych na 7 stałych powierzchniach próbnych w Białowieskim Parku Narodowym w latach 1975– 2019 (wschodnia Polska, dalej BPN, Fig. 1). Przeanalizowano zmiany w składzie ugrupowań ptaków lęgowych w trzech najważniejszych typach drzewostanów pierwotnych w BPN: łęgach (Fig. 2), grądach (Fig. 3) i borach (Fig. 4). Cenzusy kontynuowane w latach 2015–2019 z wykorzystaniem kombinowanej metody kartograficznej na siedmiu stałych powierzchniach próbnych w BPN, monitorowanych od 1975 r., w tym dwóch na skraju lasu i pięciu w jego wnętrzu wykazały gniazdowanie 69 gatunków ptaków. Najwięcej gatunków gniazdowało w łę…
Dendro-archaeological contribution to the history of forest exploitation: a case of the Gallo-Roman settlement of Oedenburg (Alsace, France) between …
2011
International audience
Sabiedrībā aktuālu tēmu vizualizācija, izmantojot sociālo tīklu un tīmekļa meklētāju datus
2015
Sabiedrībā risinās notikumi, kuri ir aktuāli un kuriem seko līdzi ikviens mūsdienīgs tīmekļa lietotājs. Pateicoties tieši moderno tehnoloģiju straujajai attīstībai, sabiedrībā aktuālo iespējams uzzināt praktiski vienlaicīgi ar tā risināšanās gaitu. Galvenie darba mērķi ir salīdzināt un izpētīt populārākos tīmekļu meklētājus un sociālos tīklus, kuri nodrošina informācijas piegādi lielākajai daļai lietotāju. Izmantojot tīmekļu meklētāju un sociālo tīklus, iegūtos datus, veikt analīzi par sabiedrībā aktuālo tēmu ieguves iespējām. Balstoties uz izdarītajiem secinājumiem, ievākt un attēlot pieejamo informāciju interneta vietnē. Galvenais uzsvars tiek likts uz vēsturisko datu pieejamību un inform…
The Future of Co-Creation
2011
The objective of this article is to provide a brief summary of the key directions in value co-creation research that have emerged in the last 10 years. It points to several emerging streams in value co-creation research including: i) general management perspective; ii) new product development and innovation; iii) virtual customer environments; iv) service science and service-dominant logic (SDL) of marketing; and v) international markets and entrepreneurship, with a focus on the general management and innovation perspectives. In addition, the article points to another emerging new direction focusing on business co-creation. The development of business co-creation frameworks integrating the …
A Methodological Approach to Determine Sound Response Modalities to Coastal Erosion Processes in Mediterranean Andalusia (Spain)
2020
Human occupation along coastal areas has been greatly increasing in recent decades and, in many places, human activities and infrastructures are threatened by erosion processes that can produce relevant economic and human losses. In order to reduce such impacts and design sound management strategies, which can range from the &ldquo