Zoekresultaten

Artificial reefs in the Caribbean

Caribbean coral reefs are in decline and the deployment of artificial reefs, structures on the sea bottom that mimic one or more characteristics of a natural reef, is increasingly often considered to sustain ecosystem services. Independent of their specific purposes, it is essential that artificial reefs do not negatively affect the already stressed surrounding habitat. To evaluate the ecological effects of artificial reefs in the Caribbean, an analysis was performed on 212 artificial reefs that were deployed in the Greater Caribbean between 1960 and 2018, based on cases documented in grey (n = 158) and scientific (n = 54) literature. Depending on the availability of data, reef type and purpose were linked to ecological effects and fisheries management practices around the artificial reefs. The three most common purposes to deploy artificial reefs were to create new dive sites (41%), toperform research (22%) and to support ecosystem restoration (18%), mainly by stimulating diversity. Ship wrecks (44%), reef balls© (13%) and piles of concrete construction blocks (11%) were the most-often deployed artificial reef structures and metal and concrete were the most-used materials. The ecological development onartificial reefs in the Caribbean appeared to be severely understudied. Research and monitoring has mostly been done on small experimental reefs that had been specifically designed for science, whereas the most commonly deployed artificial reef types have hardly been evaluated. Studies that systematically compare the ecological functioning of different artificial reef types are virtually non-existent in the Caribbean and should be a research priority, including the efficacy of new designs and materials. Comparisons with natural reef ecosystems are scarce. Artificial reefs can harbor high fish densities and species richness, but both fish and benthos assemblages often remain distinct from natural ecosystems. Studies from other parts of the world show that artificial reefs can influence the surrounding ecosystem by introducing non-indigenous species and by leaking iron. As artificial reefs attract part of their marine organisms from surrounding habitats, intensive exploitation by fishers, without clear management, can adversely affect the fish stocks in the surrounding area and thus counteract any potential ecosystem benefits. This study shows that over 80% of artificial reefs in the Caribbean remain accessible tofishers and are a risk to the surrounding habitat. To ensure artificial reefs and their fisheries do not negatively affect the surrounding ecosystem, it is imperative to include artificial reefs, their fisheries and the surrounding ecosystem in monitoring programs and management plans and to create no-take zones around artificial reefs that are not monitored.

Does Science-Fiction predict [or change] the future?

This research paper looks at a selection of science-fiction films and its connection with the progression of the use of television, telephone and print media. It also analyzes statistical data obtained from a questionnaire conducted by the research group regarding the use of communication media.

"There's no business like sportbusiness"

Oratie bij de aanvaarding van het lectoraat Sportbusiness aan de Fontys Economische Hogeschool Tilburg op 8 juni 2005.

Digital Twins for the Real World

Animal embodiment: embodying a beaver in immersive virtual environments to create empathy and teach about the impact of global warming in a playful way.

Constructing authenticity in contemporary consumer culture: The case of lifestyle sports

For twenty years, typical outdoor lifestyle sports like rafting, snowboarding and rock climbing, which used to be exclusively practised in natural environments, are being offered in controlled artificial settings. This process can be described as 'the indoorisation of outdoor sports'. With this development, questions of authenticity arise. Are these new, commercial forms still authentic lifestyle sports? And can we consider the participants in these indoorised lifestyle sports as authentic? There has been a discussion about authenticity in lifestyle sports since its worldwide popularisation and it is worth to reconsider this discussion against the background of new, commercial versions of lifestyle sports. Therefore, in this paper a qualitative analysis is offered about the consumption of a constructed authenticity in a cultural context increasingly characterized by artificialization.