Functional Effects of Parasites on Food Web Properties during the Spring Diatom Bloom in Lake Pavin: A Linear Inverse Modeling Analysis

This study is the first assessment of the quantitative impact of parasitic chytrids on a planktonic food web. We used a carbon-based food web model of Lake Pavin (Massif Central, France) to investigate the effects of chytrids during the spring diatom bloom by developing models with and without chytrids. Linear inverse modelling procedures were employed to estimate undetermined flows in the lake. The Monte Carlo Markov chain linear inverse modelling procedure provided estimates of the ranges of model-derived fluxes. Model results support recent theories on the probable impact of parasites on food web function. In the lake, during spring, when ‘inedible’ algae (unexploited by planktonic herbivores) were the dominant primary producers, the epidemic growth of chytrids significantly reduced the sedimentation loss of algal carbon to the detritus pool through the production of grazer-exploitable zoospores. We also review some theories about the potential influence of parasites on ecological network properties and argue that parasitism contributes to longer carbon path lengths, higher levels of activity and specialization, and lower recycling. Considering the “structural asymmetry” hypothesis as a stabilizing pattern, chytrids should contribute to the stability of aquatic food webs

Barriers to adequate follow-up during adjuvant therapy may be important factors in the worse outcome for Black women after breast cancer treatment

<p>Abstract</p> <p>Introduction</p> <p>Black women appear to have worse outcome after diagnosis and treatment of breast cancer. It is still unclear if this is because Black race is more often associated with known negative prognostic indicators or if it is an independent prognostic factor. To study this, we analyzed a patient cohort from an urban university medical center where these women made up the majority of the patient population.</p> <p>Methods</p> <p>We used retrospective analysis of a prospectively collected database of breast cancer patients seen from May 1999 to June 2006. Time to recurrence and survival were analyzed using the Kaplan-Meier method, with statistical analysis by chi-square, log rank testing, and the Cox regression model.</p> <p>Results</p> <p>265 female patients were diagnosed with breast cancer during the time period. Fifty patients (19%) had pure DCIS and 215 patients (81%) had invasive disease. Racial and ethnic composition of the entire cohort was as follows: Black (N = 150, 56.6%), Hispanic (N = 83, 31.3%), Caucasian (N = 26, 9.8%), Asian (N = 4, 1.5%), and Arabic (N = 2, 0.8%). For patients with invasive disease, independent predictors of poor disease-free survival included tumor size, node-positivity, incompletion of adjuvant therapy, and Black race. Tumor size, node-positivity, and Black race were independently associated with disease-specific overall survival.</p> <p>Conclusion</p> <p>Worse outcome among Black women appears to be independent of the usual predictors of survival. Further investigation is necessary to identify the cause of this survival disparity. Barriers to completion of standard post-operative treatment regimens may be especially important in this regard.</p

Active City for Healthy Ageing and Anti-globesity

Health and urban space are two realities that need to progress in close connection; in fact, there is an increasing interest in identifying the links between architecture and public health and how urban design can positively influence the latter. A vision able to reconstruct a profitable reconnection between health, urban planning and environmental planning in line with current evidence and research on the cultural and organizational transition from Public Health to Urban Health is required. The research topic addresses the importance and the centrality of the User-Centred approach in the observation of the relationships established between man, technological systems and the constructed environment, identifying design strategies that guarantee the conditions of physical, mental and social well-being

The Role of Active Mobility for the Promotion of Urban Health

In the debate on the issue of designing spaces for ‘slow’ urban mobility, this paper emphasizes the importance and centrality of the human-centered approach through the observation of the relations that are established among people, technological systems and constructed environments in order to design according to anatomical and metric needs (anthropometric view) as well as to the needs linked with perception and cognitive processes (anthropocentric view). Two levels of interface in the person-system relationship have been identified, the “individual space”, where internal variables impact the “user system” (factors related to the psycho-physiological perception of space), and the “prosthetic space”, where external variables influence the “environment system” (factors that influence the capability of the architectural space to become physiologically and behaviorally prosthetic)

Exploring Tangible and Intangible Landscapes of Evocative Places: Case Study of the City of Vitória in Brazil

This paper explores tangible and intangible characteristics of places. It concentrates on gathering characteristics, emotions, memories and stories related to self-selected evocative places in a city. Evocative places are defined as places that evoke images, memories or emotions. There are two goals identified for this article. The first goal is to study which words citizens use to describe the main characteristics of their self-selected evocative places. The second goal is to map emotions associated with the self-selected evocative places. The case study selected in this research is the city of Vitória in Brazil. We collected 192 evocative places and their characteristics with the help of an online mapping platform that links an online questionnaire with an interactive map. This paper summarizes the main results gathered empirically about evocative places in Vitória, their characteristics and the emotions felt at these places. These places are then mapped in a geographic information system (GIS) in order to understand their locations and concentrations. On the basis of this empirical work in Vitória , and the work accomplished in the cities of Hamburg (Germany), Vienna (Austria), Ames and Grinnell (both Iowa, USA), we also designed and expanded the conceptual model of evocative places presented in this paper for the first time. The conceptual model includes four main categories with which an evocative place can be described including its physical characteristics, experiences, senses and values. We conclude the article with a discussion and further research directions.Heritage & Value