Search results for "destruction"
showing 10 items of 99 documents
Mining extraction in the ocean depths: a baseline to understand and reduce acoustic impact on biodiversity.
2020
[ES] A lo largo de la historia, el hombre ha explotado los recursos minerales de la tierra para su supervivencia y desarrollo tecnológico sin un equilibrio con su regeneración. Dado el crecimiento de la población mundial y la reducción de recursos, el hombre comenzó a buscar nuevos depósitos que se encontraron en la década de 1960 en las profundidades de los océanos. Con estos, la humanidad empezò a pensar en extraer los minerales de estos depósitos y esto llevò al nacimiento de Deep Sea Mining (DSM). Las consecuencias de las actividades mineras en las profundidades del mar no se conocen realmente y los efectos pueden ser diferentes: contaminación acústica, contaminación lumínica, contamina…
Effect of timing of grassland destruction on nitrogen mineralization kinetics.
2007
International audience
Actor engagement as a base for value co-creation in service ecosystem : case study of future electricity demand-side response service for households
2019
This thesis focuses on exploring the value co-creation in the future electricity demand-side response (DSR) service for households. DSR service is implemented as a cloud service, where high-power home appliances are switched off, if there are consumption overload in the power grid and the flexibility is needed. The service is necessary, especially when the use of electric cars increases. As electricity consumption is expected to increase, it creates challenges for electricity network capacity. Increased production in the near future, as well as moving towards more carbon-neutral production mode, will increase the challenges for the adequacy of electricity. With this service, it is possible …
Impact of human disturbance and beliefs on the tree agama Acanthocercus atricollis atricollis in a South African communal settlement
2009
We investigated the effects of human disturbance and attitudes on the density of the tree agama Acanthocercus atricollis atricollis in a densely populated rural settlement in South Africa. In this environment agamas live on trees that are harvested for firewood or maintained for fruit production. We conducted visual encounter surveys of A. a. atricollis and interviewed local households to establish whether human attitudes and actions could affect tree agama populations. Although local residents viewed tree agamas negatively (50% of interviewees claimed to have killed an agama) and acted to exclude them from their environment, tree agama density in villages was higher than that of adjacent c…
Thresholds in selection of breeding habitat by the Eurasian treecreeper (Certhia familiaris)
2005
Abstract Assessment of habitat thresholds is a topical issue in ecology, both from theoretical and applied perspectives. We examined how forest structure influences selection of breeding habitat in the Eurasian treecreeper (Certhia familiaris). It is an old-growth forest passerine, which can be considered an umbrella species. Habitat selection data, covering five breeding seasons, were collected from a study area across three spatial scales: (a) territory core scale (a radius of 30 m), (b) territory scale (a radius of 200 m) and (c) large scale (a radius of 500 m). Logistic regression analyses revealed that the radii of 30 and 200 m from the nest were the most important spatial scales for t…
From digitalization to cybernization : Delivering value with cybernized services
2019
This reflection note, based on the lead author’s keynote presentation at the Information Systems Research Seminar in Scandinavia/Scandinavian Conference on Information Systems 2019, makes an argument for the need to study the transformation from digital services to cybernized services offered by service providers to their customers. We first discuss the digitalization of services. Then, we argue that the emergence of cyber-physical systems enables a new kind of services that apply; e.g.; the internet of things, analytics of sensor-based big data, and artificial intelligence for value creation. In other words, the cybernization of services. We illustrate two particular approaches for underst…
Consequences of correlations between habitat modifications and negative impact of climate change for regional species survival
2011
Abstract While several empirical and theoretical studies have clearly shown the negative effects of climate or landscape changes on population and species survival only few of them addressed combined and correlated consequences of these key environmental drivers. This also includes positive landscape changes such as active habitat management and restoration to buffer the negative effects of deteriorating climatic conditions. In this study, we apply a conceptual spatial modelling approach based on functional types to explore the effects of both positive and negative correlations between changes in habitat and climate conditions on the survival of spatially structured populations. We test the…
Do not disturb the family: roles of colony size and human disturbance in the genetic structure of lesser kestrel
2015
Dispersal and philopatry are fundamental processes influencing the genetic structure and persistence of populations, and might be affected by isolation and habitat perturbation. Habitat degradation induced by human activities could have detrimental consequences on the genetic structure of populations. Therefore, it is crucial to understand the role of human impact in promoting or disrupting the genetic structure. Here, we conducted a genetic analysis using 12 polymorphic microsatellite markers of 70 lesser kestrels Falco naumanni from 10 breeding colonies of two subpopulations in Sicily (southern Italy). Genetic differentiation between the two subpopulations was negligible, and linear dista…
Comparative analysis of biological and ecological differentiation of Anemone palmata L. (Ranunculaceae) in the western Mediterranean (France and Spai…
2002
The western Mediterranean geophyte Anemone palmata L. is one of the most endangered angiosperm taxa in France. The biological and ecological characteristics of French populations are contrasted with those of populations from near the centre of the species distribution in east Spain. A Correspondence Analysis discriminates the French and Spanish populations according to substrate and the composition of the plant communities where they grow. The karyological study reveals that east Spanish plants are autotetraploid, whilst the French are all diploid. In addition, morphological differences were registered, Spanish plants generally being more vigorous. French populations consist mostly of senil…
La face cachée de la co-création de valeur : l’exemple de l’architecture commerciale française
2019
L’innovation requiert une activité en réseau pour laquelle différents acteurs doivent s’associer. La conduite d’une enquête ethnographique au sein de l’architecture commerciale française souligne l’ambivalence du processus de coproduction. L’analyse identifie des sources de co-création et co-destruction, liées aux motivations des acteurs et à leurs interactions, et rend compte de leurs conséquences. Les détaillants sont invités à se (re)positionner comme des chefs de projet, garants de l’assignation des rôles et de l’arbitrage entre les fonctions créatives et techniques. Le développement de nouvelles plateformes de communication, susceptibles de pallier les biais d’interprétation entre acte…