996 resultados para AK4-227
Resumo:
Species-area relationships (SAR) are fundamental in the understanding of biodiversity patterns and of critical importance for predicting species extinction risk worldwide. Despite the enormous attention given to SAR in the form of many individual analyses, little attempt has been made to synthesize these studies. We conducted a quantitative meta-analysis of 794 SAR, comprising a wide span of organisms, habitats and locations. We identified factors reflecting both pattern-based and dynamic approaches to SAR and tested whether these factors leave significant imprints on the slope and strength of SAR. Our analysis revealed that SAR are significantly affected by variables characterizing the sampling scheme, the spatial scale, and the types of organisms or habitats involved. We found that steeper SAR are generated at lower latitudes and by larger organisms. SAR varied significantly between nested and independent sampling schemes and between major ecosystem types, but not generally between the terrestrial and the aquatic realm. Both the fit and the slope of the SAR were scale-dependent. We conclude that factors dynamically regulating species richness at different spatial scales strongly affect the shape of SAR. We highlight important consequences of this systematic variation in SAR for ecological theory, conservation management and extinction risk predictions.
Resumo:
We examined a remnant host plant (Primula veris L.) habitat network that was last inhabited by the rare butterfly Hamearis lucina L. in north Wales in 1943, to assess the relative contribution of several spatial parameters to its regional extinction. We first examined relationships between P. veris characteristics and H. lucina eggs in surviving H. lucina populations, and used these to predict the suitability and potential carrying capacity of the habitat network in north Wales. This resulted in an estimate of roughly 4500 eggs (ca 227 adults). We developed a discrete space, discrete time metapopulation model to evaluate the relative contribution of dispersal distance, habitat and environmental stochasticity as possible causes of extinction. We simulated the potential persistence of the butterfly in the current network as well as in three artificial (historical and present) habitat networks that differed in the quantity (current and X3) and fragmentation of the habitat (current and aggregated). We identified that reduced habitat quantity and increased isolation would have increased the probability of regional extinction, in conjunction with environmental stochasticity and H. lucina's dispersal distance. This general trend did not change in a qualitative manner when we modified the ability of dispersing females to stay in, and find suitable habitats (by changing the size of the grid cells used in the model). Contrary to most metapopulation model predictions, system persistence declined with increasing migration rate, suggesting that the mortality of migrating individuals in fragmented landscapes may pose significant risks to system-wide persistence. Based on model predictions for the present landscape we argue that a major programme of habitat restoration would be required for a re-established metapopulation to persist for > 100 years.
Resumo:
Purpose
A number of school-based domestic abuse prevention programmes have been developed in the United Kingdom, but evidence as to the effectiveness of such programmes is limited. The aim of the research was to evaluate the effectiveness of one such programme and to see whether the outcomes differ by gender and experiences of domestic abuse.
Method
Pupils aged 13–14 years, across seven schools, receiving a 6-week education programme completed a questionnaire to measure their attitudes towards domestic violence at pre-, post-test, and 3-month follow-up, and also responded to questions about experiences of abuse (as victims, perpetrators, and witnesses) and help seeking. Children in another six schools not yet receiving the intervention responded to the same questions at pre- and post-test. In total, 1,203 children took part in the research.
Results
Boys and girls who had received the intervention became less accepting of domestic violence and more likely to seek help from pre- to post-test compared with those in the control group; outcomes did not vary by experiences of abuse. There was evidence that the change in attitudes for those in the intervention group was maintained at 3-month follow-up.
Conclusions
These findings suggest that such a programme shows great promise, with both boys and girls benefiting from the intervention, and those who have experienced abuse and those who have not (yet) experienced abuse showing a similar degree of attitude change.
Resumo:
The research presented here is product of a practice-based process that primarily generates knowledge through collaboration and exchange in performance situations. This collaboration and exchange with various musicians over a period of five years that constitutes a body of practice that is here reflected upon. The paper focuses on non-instructional graphic scores and presents some insights based on performances of works by the author. We address how composition processes are revealed in graphic scores by looking at the conditions of decision making at the point of preparing a performance. We argue that three key elements are at play in the interpretation of these types of graphic scores: performance practice, mapping and musical form. By reflecting particularly on the work Cipher Series (Rebelo, 2010) we offer insights into the strategies for approaching the performance of graphic scores that go beyond symbolic codification.
Resumo:
Purpose To evaluate the incidence of treatment-requiring retinopathy of prematurity (ROP) over a 12-year-period in Northern Ireland. Methods The medical records of all infants treated for ROP from January 2000 to December 2011were retrospectively reviewed and cross-referenced with the Neonatal Intensive Care Outcomes Research and Evaluation (NICORE) database. Results The Northern Ireland population data showed an increase in the number of live births from 2000 to 2011. The proportion of babies born with a birth weight <1501 g and/or <32 weeks’ gestational age remained constant (χ2 trend = 3.220, P = 0.0727), although the proportion of these babies who died prior to 42 weeks’ gestation decreased from 2000 to 2011 (P = 0.0196 using χ2 for trend = 5.445; P = 0.0354 using χ2 = 20.809). The prevalence of treatment-requiring ROP in these infants increased from 1.05% in 2000 to 5.78% in 2011 (P < 0.001 using χ2 trend = 16.309; P < 0.001 using χ2 = 31.378). Conclusions The present population-based study highlights that the incidence of treatment- requiring ROP is increasing in Northern Ireland. The increasing number of infants requiring treatment will need to be taken into consideration in the commissioning process for ROP services in Northern Ireland.
Resumo:
Book review of A GUERRA E AS IGREJAS: ANGOLA 1961-1991. By Benedict Schubert.
Basel, Switzerland: P. Schlettwein Publishing, 2000. Pp. vii; 251; Introduction
by Christine Messiant. CHF. 30, NAM 70, ZAR 70 paper.
Resumo:
Estudio elaborado por Fundación ONCE y Vía Libre y cuenta con la colaboración del Comité Español de Representantes de Personas con Discapacidad (CERMI). El objetivo del Observatorio es analizar la accesibilidad del parque de viviendas familiares de uso principal en España, determinar posibles variables que están influyendo en la accesibilidad, proponer recomendaciones orientadas a la mejora y realizar mediciones posteriores para conocer la evolución en este ámbito. Para ello, la investigación se ha abordado desde una metodología cuantitativa, desarrollada a través de encuesta telefónica, que se ha completado con una fase cualitativa previa y una evaluación técnica de la accesibilidad “in situ” de una muestra de vivienda.
Resumo:
Dissertação mest., Ciências da Educação, Universidade do Algarve, 2009
Resumo:
Für Freizeitmaßnahmen mit Jugendlichen sollten anspruchsvolle formale und inhaltliche Standards und Qualitätskriterien gelten. Ebenso gebührt Dokumentation und Evaluation von Freizeiten kontinuierliche Beachtung. Die einzelnen Abschnitte dieses Handbuches unterstützen eine derartige professionelle Arbeit. Die Ausführungen enthalten u. a. Konzepterstellung, Rechtsgrundlagen, Teamarbeit, Mitarbeiterschulung und pädagogische Problemfelder. Die Verfasserin, Absolventin der Studiengänge Religionspädagogik/Diakonie und Sozialarbeit an der Evangelischen Fachhochschule Hannover erläutert außerdem Rechte, Pflichten und Aufgaben von Mitarbeitern auf Freizeiten. Neben den weiteren Themen Öffentlichkeitsarbeit, Reflexion und Nachbereitung von Freizeitmaßnahmen sind Gesetzestexte, Zeitraster und Spielvorschläge in einem Anhang aufgelistet. Die Praxishilfe für Freizeitmaßnahmen richtet sich gleichermaßen an sozialpädagogische wie religionspädagogische Fachkräfte. Letzteren sind einige spezielle Themen wie Rituale, Glaube und Gottesdienst gewidmet.
Resumo:
This study seeks to expand our understanding of how the media increase the level of political information, by focusing on an understudied yet important learning outcome: knowledge of the political past. The article explores the factors underlying variation in the recognition of the leading actors in the transitional process in Portugal. The results show that television news and newspaper exposure foster recognition of these actors, but that media use interacts with personal experience of the transition (stronger effects among younger cohorts) and party identification (stronger impact on those who do not feel close to a political party).
Resumo:
Cities have become a focal point for efforts to transition towards a more sustainable, low-carbon society, with many municipal agencies championing ‘eco city’ initiatives of one kind or another. And yet, national policy initiatives frequently play an important – if sometimes overlooked – role, too. This chapters provides comparative perspectives on four recent national sustainable city programmes from France, India, Japan, and the United Kingdom. The analysis reveals two key insights: first, national policy is found to exercise a strong shaping role in what sustainable development for future cities is understood to be, which helps explain the considerable differences in priorities and approaches across countries. Second, beyond articulating strategic priorities, national policy may exercise a ‘soft’ governance function by incentivising and facilitating wider, voluntary governance networks in the effort to implement sustainable city projects locally. This innovative role, however, depends on the ability of national policy to produce resonance among societal actors and on its effective interaction with formal planning processes.