Matrix composition mediates effects of habitat fragmentation: a modelling study

Context Habitat loss has clear negative effects on biodiversity, but whether fragmentation per se (FPS), excluding habitat loss does is debatable. A contribution to this debate may be that many fragmentation studies tend to use landscapes of fragmented focal-habitat and a single vastly different species-poor intervening land cover (the matrix). Objectives How does matrix composition influence the effect of FPS on biodiversity?. Methods Using an individual-based model to investigate the effect of different configurations of the matrix on the relationship between FPS and biodiversity of the focal-habitat. We manipulated the number and quality of land cover types in the matrix, and their similarity to the focal-habitat. Results Extremely different matrix, caused an order of magnitude stronger effect of FPS on alpha- and gamma-diversity and beta-diversity to decline. Low FPS led to high gamma-diversity. Increasing FPS caused a dramatic decline to low diversity. In contrast landscapes with a more similar matrix had lower diversity under low FPS declining little with increasing FPS. Having few matrix types caused beta-diversity to decline in general compared to landscapes with a larger numbers. Conclusions The effects of FPS on biodiversity may change depending on the number of matrix types and their similarity to the focal-habitat. We recommend that fragmentation studies should consider a greater variety of landscapes to help assess in which cases FPS does not have a negative impact and allow better predictions of the impacts of fragmentation. We show the importance of having a diversity of matrix land cover types and improving the hospitability of the matrix for species dependent on the focal-habitat

Interactions between ant species increase arrival rates of an ant parasitoid

Behaviours or traits associated with aggression and communication may increase an animal's conspicuousness to predators or parasitoids. Most examples of this come from instances of aggression or communication within a species. We tested whether interspecific encounters between ants enhance the host location success of a parasitoid (Diptera: Phoridae) that attacks ants in the genus Linepithema. At food resources recruited to by Linepithema, parasitoid discovery rates were lower when Linepithema was alone than when other ant species were present. In experimentally controlled encounters, parasitoid discovery rates were elevated when Linepithema confronted an ant species that elicited use of chemicals, but not when it confronted an ant species that primarily elicited physical aggression. These results indicate that phorid parasitoids of Linepithema use the ant's chemicals as host location cues. Because Linepithema is known to abandon food resources in the presence of its phorid parasitoids, its use of chemicals during interspecific encounters may diminish its competitive success when phorids are nearby. (C) 2003 Published by Elsevier Ltd on behalf or The Association for the Study or Animal Behaviour.6561187119

Desafios da atenção básica em saúde: a experiência de Vila Mariana, São Paulo, Brasil Challenges in primary health care: the experience in Vila Mariana District, São Paulo, Brazil

Este artigo apresenta resultados de estudo de caso visando identificar desafios na oferta de atenção básica à saúde em um distrito de saúde da cidade de São Paulo, Brasil, considerando integralidade como dispositivo organizador do trabalho neste nível de atenção. Foram estudadas as cinco unidades que compõem a rede de atenção básica à saúde no distrito considerado. Os dados foram coletados mediante observação dos fluxos e rotinas de atendimento, realização de entrevistas com gerentes e profissionais de diferentes formações e ainda realização de grupos focais com equipes de saúde da família. A análise mostra um descompasso entre as características da clientela e suas necessidades presumidas e as ofertas dos serviços, e heterogeneidade nas percepções dos profissionais sobre seu trabalho. Falta de profissionais, de tempo, e dificuldades para encaminhamentos foram os principais problemas apontados pelos entrevistados.<br>This article presents the results of a case study aimed at identifying challenges for the delivery of primary health care in a health district in the city of São Paulo, Brazil, considering comprehensiveness as a central device for organizing work at this level of care. Five units in the district's primary care network were studied. We collected the data by observing work routines and flows, conducting interviews with managers and health professionals from different backgrounds, and through focus groups with family health teams. The analysis shows a mismatch between users' characteristics and their presumed needs and the heterogeneity of the health professionals' perceptions concerning their work. Lack of staff and time and difficulties with referrals were the main problems identified by interviewees

Características da utilização de serviços de atenção básica à saúde nas regiões Sul e Nordeste do Brasil: diferenças por modelo de atenção

In view of the emphasis on primary care for the health system and the consolidation of Family Healthcare Strategy, it is important that information on attended demand be updated to assist in administration of the Unified Health System (UHS). The study compared the profile of attended demand in basic healthcare units (BHU) of two care models (traditional and family health) in 240 BHU of seven states of the South and the Northeast. Collected on a prepared form, all patients attended in a single day were processed with the PACOTAPS application. 26,019 patients were attended, 52% in the South and 48% in the Northeast; one third in Traditional BHU and 67% in BHU of FHP. The highest proportion of patients attended was females aged between 15 and 49 (36%), with significant differences between the models, being higher in BHU of FHP. The second highest proportion was people aged 50 or older(30%), significantly higher in Traditional BHU. The most commonly registered procedures were basic nursing cases (33%), with higher proportion in Traditional BHCU. The proportion of medical appointments was 22%, double in Traditional BHCU. The profile of the demand reflected the differences between the ongoing care models in the country and may provide the organization of work processes in basic care.Considerando o destaque da atenção básica para o sistema de saúde e a consolidação da Estratégia da Saúde da Família, é importante que as informações sobre a demanda atendida sejam atualizadas para apoiar a gestão do SUS. O estudo comparou o perfil da demanda atendida em unidades básicas de saúde (UBS) de dois modelos de atenção (tradicional e saúde da família [PSF]) em 240 UBS de sete estados do Sul e Nordeste. Coletados em formulário próprio, todos os atendimentos de um dia de trabalho foram processados com o aplicativo PACOTAPS. Foram registrados 26.019 atendimentos, 52% no Sul e 48% no Nordeste; um terço em UBS Tradicionais e 67% em UBS do PSF. A maior proporção de atendimentos foi para mulheres entre 15 e 49 anos (36%), com diferenças significativas entre os modelos, sendo maior nas UBS do PSF. A segunda maior proporção foi de pessoas com 50 anos ou mais de idade (30%), significativamente maior nas UBS Tradicionais. Os procedimentos mais registrados foram os atendimentos básicos de enfermagem (33%), com maior proporção nas UBS Tradicionais. A proporção de consultas médicas foi de 22%, sendo duas vezes maior nas UBS Tradicionais. O perfil da demanda refletiu as diferenças entre os modelos de atenção no país e pode subsidiar a organização dos processos de trabalho em atenção básica