University of Alcalá

About: University of Alcalá is a education organization based out in Alcalá de Henares, Spain. It is known for research contribution in the topics: Population & Context (language use). The organization has 10795 authors who have published 20718 publications receiving 410089 citations. The organization is also known as: University of Alcala & University of Alcala de Henares.

Regional convergence in the European Union: From hypothesis to the actual trends

Abstract: Economic convergence or non-convergence between countries and regions continues to attract analytical attention in Europe. To converge in real terms and not only in terms of nominal variables is one of the basic aims of the European Union Treaty. A first objective of this paper is to offer an overview on what is actually happening in the European Union in contrast to some generally accepted hypotheses and models predicting regional convergence. Empirical evidence shows that after a period of (relative) regional convergence in GDP per capita as well in terms of labour productivity, this process has almost completely ended. Possible explanations go from the most pro-convergence theories (optimists) to those that outweigh real obstacles to theoretical assumptions (pessimists). As a second objective the paper examines two important facts that can contribute to explaining the actual trends. The first is named the `national effect', where regions of each country have economic behaviour strongly linked to the national economy as a whole. The second is the `differential' behaviour of many European regions in terms of economic outcomes.

What explains the invading success of the aquatic mud snail Potamopyrgus antipodarum (Hydrobiidae, Mollusca)?

Abstract: The spread of non-native species is one of the most harmful and least reversible disturbances in ecosystems. Species have to overcome several filters to become a pest (transport, establishment, spread and impact). Few studies have checked the traits that confer ability to overcome these steps in the same species. The aim of the present study is to review the available information on the life-history and ecological traits of the mud snail, Potamopyrgus antipodarum Gray (Hydrobiidae, Mollusca), native from New Zealand, in order to explain its invasive success at different aquatic ecosystems around the world. A wide tolerance range to physico-chemical factors has been found to be a key trait for successful transport. A high competitive ability at early stages of succession can explains its establishment success in human-altered ecosystems. A high reproduction rate, high capacity for active and passive dispersal, and the escape from native predators and parasites explains its spread success. The high reproduction and the ability to monopolize invertebrate secondary production explain its high impact in the invaded ecosystems. However, further research is needed to understand how other factors, such as population density or the degree of human perturbation can modify the invasive success of this aquatic snail.

Shaping, organizing, and rethinking service innovation: a multidimensional framework

Abstract: Purpose – The purpose of this paper is to review key research contributions that may be useful for rethinking service innovation. Service innovation is not a monolithic construct; therefore, the opportunities for further research are multidimensional and interdisciplinary.Design/methodology/approach – A summary analysis of extant literature identifies valuable contributions and fundamental methodological issues from various perspectives. The proposed directions for future research entail where to innovate, how to innovate, and what to innovate in services.Findings – The analysis and discussion lead to a multidimensional framework of service innovation, with a particular emphasis on organizational and customer cocreation perspectives.Practical implications – This article contains guidelines and real‐world examples to help practitioners and policy makers develop service innovation strategies through the consideration of different levels, organizations, and perspectives.Originality/value – This article offer...

What explains variation in the impacts of exotic plant invasions on the nitrogen cycle? A meta-analysis.

Abstract: Exotic plant invasions can notably alter the nitrogen (N) cycle of ecosystems. However, there is large variation in the magnitude and direction of their impact that remains unexplained. We present a structured meta-analysis of 100 papers, covering 113 invasive plant species with 345 cases of invasion across the globe and reporting impacts on N cycle-related metrics. We aim to explain heterogeneity of impacts by considering methodological aspects, properties of the invaded site and phylogenetic and functional characteristics of the invaders and the natives. Overall, plant invasions increased N pools and accelerated fluxes, even when excluding N-fixing invaders. The impact on N pools depended mainly on functional differences and was greater when the invasive plants and the natives differed in N-fixation ability, plant height and plant/leaf habit. Furthermore, the impact on N fluxes was related mainly to climate, being greater under warm and moist conditions. Our findings show that more functionally distant invaders occurring in mild climates are causing the strongest alterations to the N cycle.