Urban park area and age determine the richness of native and exotic plants in parks of a Latin American city: Santiago as a case study

Plant diversity and composition in urban parks is determined by socio-economics, environmental, and ecological drivers. These drivers give rise to urban spaces with unique compositions of flora, consisting of planted and spontaneous species. The present study aimed to determine the contribution of native and exotic species in urban parks of a Latin American city, and to assess the related role of park area, age and socio-economic status. We also evaluated administration type (public or private) and the effect of environmental factors on plant richness. We hypothesized that the composition of park vegetation differs according to urban-rural gradient. To determine flora composition, two transects (100 m long by 1–3 m wide) per park were selected in 49 parks. In each of these, we identified all the vascular plants found (woody and herbs, planted and spontaneous), which were then classified as native or exotic. We conducted ANCOVAs in order to determine the effect of five independent variables and one factor, on native and exotic plant richness. Of 550 recorded species, 16.2% were native and 83.8% exotic. Number of plant species per park varied between 42 and 146. The parks are known urban habitats containing the highest planted and spontaneously occurring exotic diversity in the city of Santiago, contrasting with other types of habitats. Likewise, parks in Santiago are habitats with low levels of planted and spontaneously occurring native diversity, compared to the parks of Europe, America North and Asia. Ours results show that park area and age affected native plant richness, while exotic plant richness was determined only by park age. We rejected all other possible drivers. Finally, according to the low frequency of native species, we propose that Santiago’s parks could be gradually reoriented towards ex-situ conservation of native plants.     

Internal Migration Patterns of Foreign‐Born Immigrants in a Country of Recent Mass Immigration: Evidence from New Micro Data for Spain1

This paper extends the literature on the internal migration patterns of the foreign‐born by analyzing the situation in Spain, a country affected by recent but very significant migratory flows. We utilize a standard theoretical framework in order to assess the relative importance of human capital, economic, and social capital indicators. To this end, we take advantage of a new micro database, the National Immigrant Survey (Encuesta Nacional de Inmigrantes– ENI‐2007). Our findings suggest that the main theories explaining internal migration patterns of the foreign‐born are at least partly true. Evidence is presented in support of the importance of education and knowledge of the native language, income, and networks based on the sharing of social capital among family members, though less so for those based on friends and acquaintances. Spanish citizenship and employment status seem to be less important in explaining the propensity to move within the country. We argue that the lack of significance of some indicators is due mainly to the fact that Spain has become a major destination only very recently as well as to the way different immigrant groups tend to implement strategies for promotion and integration.     

Domestic Supply,Job-Specialization and Sex-differences in Pay

This article proposes an explanation of sex-differences in job-allocation and pay in different institutional contexts. Job-allocation calculations are considered to be related to (1) the distribution of housework and (2) the skill-specialization requirements of jobs. In a context of uncertainty and imperfect information, housework and job-specialization requirements generate a particular incentive structure for each sex. This incentive structure can, however, be altered by governmental action. Welfare policies and services are expected to affect allocation decisions at the micro-level both by reducing the risks of skill-depreciation for women as well as by increasing their intra-household bargaining power. Both effects combined should reduce the economic pay-offs of “traditional” sphere-specialization by sex. This model is tested using a sub-sample of married and cohabiting employees drawn for the second round of the European Social Survey. Results based on nested random-intercept regressions show that sex-differences in job-specialization and housework can explain the wage effects of occupational sex-composition and have a significant direct impact on hourly earnings. Welfare-regime interactions also suggest that the association between housework and earnings is much weaker in societies displaying high levels of defamilialization and decommodification.

On the lookout for danger: House Sparrow alert distance in three cities

Urban Ecosystems - The House Sparrow Passer domesticus, closely associated with human presence along urban–agricultural landscapes and widely distributed outside its native range, has shown...     

Physical workload during firefighting in Chilean volunteers

The study was performed in a sample of 39 firemen. The state of health for each fire fighter was evaluated by means of a clinical examination and also through some specific exams. Aerobic capacity was estimated as an indicator of physical fitness. In each load, cardiac frequency and oxygen consumption were measured under a steady state condition. Additionally, body composition was calculated using a Tanita professional scale. Physical effort at work was determined by measuring cardiac frequency using a telemetric unit. Evaluations were carried out during night shifts, registering information under the following conditions: night shifts without emergency, fire simulation, training exercises and real fire fighting. In general terms, it is possible to state that fire fighters are healthy according to the result of the clinical examination. However, it is very important to highlight that 70% of the firemen consume alcohol and 80% were smokers. The average aerobic capacity of the sample was 2.6 l/min or 34.5 ml/kg/min. In terms of overweight and obesity, the body mass index was 25.7, whereas the percentage fat mass reached an average of 22.9 %. The cardiovascular load in the night shifts without emergencies did not surpass 40%, which in Chile is considered the highest limit for sustained work. However, during training, simulations and real fires, the firemen had higher cardiac frequencies, reaching peak levels close to 100% cardiovascular load.     

Ethical issues raised by the new orientations in ergonomics and living labs

User Experience Theory (UXT) provides us with criteria for designing products and technical systems for everyday activities (playing, learning, working,…) so as to satisfy users. Living Labs (LL), are plateforms used for the design and evaluation of technical systems. As such, they constitute tools that bring to this process some constraints., However these constraints have to be articulated to the UXT. In other words, UXT should specify the place, the role and function LL should play in the design of new products, how it should contribute to satisfying UX, and how the methods and techniques should be conceived or borrowed from other disciplines. UXT also raises ethical issues: impartiality (independent, public, replicable) of research models in the context of economical constraints (dependant, private, secret prototypes) and of industrial pressure, the use of intrusive and persuasive techniques, even with the prior informed consent of participants, ergo-marketing, deontology codes, the use of specific participants, belonging of an UX innovative solution, confidentiality with ICT, and so on. Because the UX, as well as LL literature, have shown little concerns for ethical considerations, till now, we define LL-UX ethical issues as a new research topic, and we list a number of problems to be solved in order to have an ethical LL-UX methodology for open innovation.     

Longitudinal analysis of personal networks. The case of Argentinean migrants in Spain

This paper discusses and illustrates various approaches for the longitudinal analysis of personal networks (multilevel analysis, regression analysis, and SIENA). We combined the different types of analyses in a study of the changing personal networks of immigrants. Data were obtained from 25 Argentineans in Spain, who were interviewed twice in a 2-year interval. Qualitative interviews were used to estimate the amount of measurement error and to isolate important predictors. Quantitative analyses showed that the persistence of ties was explained by tie strength, network density, and alters’ country of origin and residence. Furthermore, transitivity appeared to be an important tendency, both for acquiring new contacts and for the relationships among alters. At the network level, immigrants’ networks were remarkably stable in composition and structure despite the high turnover. Clustered graphs have been used to illustrate the results. The results are discussed in light of adaptation to the host society.     

The Impact of Social Expenditure on Attitudes Towards Immigration in Europe

There is a growing body of literature dealing with the causes behind anti-immigrant sentiment and xenophobia. Based on the literature on the fiscal burden model, this paper contends that the differences in attitudes toward immigration, between low and high statuses, can be explained by the size of the welfare state. We argue that the impact of socio-economic status on attitudes toward immigration is larger in countries where social expenditure is high. Since a potential increase in the number of welfare recipients due to new immigrants might lead to a reduction in per capita transfers, low-income individuals in these countries are expected to be more concerned about the effect of immigration on social benefits. Using multilevel models and data from the European Social Survey we have found that while the effect of socio-economic status on attitudes toward immigration is positive there is a great deal of variation between countries. The difference in attitudes between high and low socio-economic statuses increases as social expenditure increases. Moreover, increases of social expenditure in the short run increases anti-immigrant sentiment as it raises concerns about the impact of immigration on welfare services.