Search results for "ECOSYSTEM"
showing 10 items of 1752 documents
Multibiomarker approach to fipronil exposure in the fish Dicentrarchus labrax under two temperature regimes
2020
12 pages, 5 figures, 3 tables, supplementary data https://doi.org/10.1016/j.aquatox.2019.105378
“I Learned It through the Grapevine…”: Exploring Atypical Ecosystems in Schools as a New Out-of-School Learning Site
2017
Ecology may be seen as one of the main topics of biological education as it functions at the interface of several other aspects of biology. Although it may easily be conveyed through field trips and hands-on activities, it is taught theoretically most of the time and in traditional ecosystems like forests or lakes. For this study, new teaching material has been developed that demonstrates the exploration of more special or “atypical” ecosystems in biology classes. It combines working in a local vineyard with hands-on elements for school. By exploring a human-made ecosystem, which is different from those traditionally used, students gain content knowledge and get to know scientific methods. …
Negative Engagement
2018
Negative engagement has steeply increased on the scholarly agenda along with the introduction of real time and social media, though negative experiences and emotions are as such not new phenomena. This chapter takes a future perspective and focuses on negative stakeholder engagement online in the context of organizations and brands, which increasingly face visible forms of negative stakeholder emotions or even fierce "shit storms". It begins by defining what negative stakeholder engagement refers to in the context of organizations and brands. The chapter introduces the development of negative engagement via related concepts. After introducing the concepts, the process and the outcomes of ne…
Regime shifts and alternative stable states in intertidal rocky habitats: State of the art and new trends of research
2018
Abstract The existence of regime shifts and alternative stable states in ecosystems is well known and has very large effects on their structure and dynamics. Since shifts between alternative stable states have significant implications for the ecosystems conservation, their prevention should be an aim of primary interest, and for this reason a particular attention has been paid to their study. Regarding marine ecosystems, rocky intertidal habitats, in particular, represent an ideal system for the study of alternative stable states because of their characteristics: they exhibit strong environmental gradients, are easy to manipulate, and most of the inhabiting species grow rapidly. Given the s…
An invasive species may be better than none: invasive signal and native noble crayfish have similar community effects
2014
14 pages; International audience; Human activities have resulted in the decline of native crayfish and promoted the spread of invasive crayfish species in European fresh waters, threatening ecosystem structure and functioning. We compared effects of native noble crayfish (Astacus astacus), invasive signal crayfish (Pacifastacus leniusculus) and of the absence of crayfish on leaf litter breakdown and invertebrate prey density and biomass in stream ecosystems. In microcosm experiments, invertebrate shredder density was significantly reduced by crayfish presence but similarly affected by the two crayfish species. While crayfish did not directly influence leaf litter breakdown, their presence r…
Cultivation of primmorphs from the marine sponge Suberites domuncula: morphogenetic potential of silicon and iron.
2002
Abstract Marine demosponges (phylum Porifera) are rich sources for potent bioactive compounds. With the establishment of the primmorph system from sponges, especially from Suberites domuncula , the technology to cultivate sponge cells in vitro improved considerably. This progress was possible after the elucidation that sponges are provided with characteristic metazoan cell adhesion receptors and extracellular matrix molecules which allow their cells a positioning in a complex organization pattern. This review summarizes recent data on the cultivation of sponges in aquaria and—with main emphasis—of primmorphs in vitro. It is outlined that silicon and Fe(+++) contribute substantially to the f…
What future for decommissioned historic irrigation canals? Crafting new identities in the Lower Ter (Spain)
2020
Historic irrigation canals are valuable socioecological systems capable of delivering several ecological and cultural services. However, ecological modernisation initiatives are leaving decommissioned ditches in limbo. A case study strategy is used to analyse the history of a decommissioned 700-year-old canal network in northeastern Spain and the unexpected intervention of several stakeholders who have attempted to redefine the former canals through new uses. The study relies on the analysis of documents and eight semistructured interviews with key stakeholders. We argue that this case reflects a policy failure in the application of multifunctionality, integrative planning and social partic…
Bridging Mediterranean cultures in the International Year of Soils 2015: A documentary exhibition on irrigation techniques in water scarcity conditio…
2017
The paper presents the activity performed at the University of Brescia by students and researchers, belonging to different Mediterranean cultures and different disciplines, to prepare a documentary exhibition on irrigation techniques in water scarcity conditions, on the occasion of the International Year of Soils 2015. Traditional irrigation techniques were identified as a key aspect of soil conservation and agricultural practices, to build living and autopoietic ecosystems, also in adverse climatic conditions, and to adapt to climatic changes. Being a structural source of ecosystem survival, and being based on long-lasting observation of the climate and of the environment, they have deep r…
Entrepreneurial ecosystems, knowledge spillovers, and their embeddedness in the sport field: a bibliometric and content analysis
2020
The aim of this article is to review the emerging research on entrepreneurial ecosystems and knowledge spillovers in general, and in the sport field in particular through bibliometric and content a...
A relational view of start-up firms inside an incubator. The case of the ARCA Consortium
2018
Purpose Analyzing the entrepreneurial ecosystem related to the ARCA consortium, the purpose of this paper is to study the relationships among the start-up firms inside an incubator. Design/methodology/approach Thanks to the adoption of the relationships concentric model and the density concentric model, the paper highlights the role of relational conditions for innovative projects in partnership among the incubated firms. Reflections herein are tested via a qualitative research approach based on a single case study: the ARCA consortium. Findings This research found that about 32 percent of relationships inside the incubator support the emergence of short-term relationships among the incuba…