Taxonomic and functional diversity of farmland bird communities across Europe:Effects of biogeography and agricultural intensification

In eight European study sites (in Spain, Ireland, Netherlands, Germany, Poland, Estonia and Sweden), abundance of breeding farmland bird territories was obtained from 500 × 500 m survey plots (30 per area, N = 240) using the mapping method. Two analyses were performed: (I) a Canonical Correspondence Analysis of species abundance in relation to geographical location and variables measuring agricultural intensification at field and farm level to identify significant intensification variables and to estimate the fractions of total variance in bird abundance explained by geography and agricultural intensification; (II) several taxonomic and functional community indices were built and analysed using GLM in relation to the intensification variables found significant in the CCA. The geographical location of study sites alone explains nearly one fifth (19. 5%) of total variation in species abundance. The fraction of variance explained by agricultural intensification alone is much smaller (4. 3%), although significant. The intersection explains nearly two fifths (37. 8%) of variance in species abundance. Community indices are negatively affected by correlates of intensification like farm size and yield, whereas correlates of habitat availability and quality have positive effects on taxonomic and functional diversity of assemblages. Most of the purely geographical variation in farmland bird assemblage composition is associated to Mediterranean steppe species, reflecting the bio-geographical singularity of that assemblage and reinforcing the need to preserve this community. Taxonomic and functional diversity of farmland bird communities are negatively affected by agricultural intensification and positively affected by increasing farmland habitat availability and quality. © 2011 Springer Science+Business Media B.V.

Youth in Contexts of Political Violence: A Developmental Approach to the Study of Youth Identity and Emotional Security in Their Communities

Going beyond the association between youth exposure to political violence and psychopathology, the current article examines within-person change in youth strength of identity with their ethno-political group and youth reports of the insecurity in their communities. Conceptually related but growing out of different paradigms, both group identity and emotional insecurity have been examined as key variables impacting youth responses to threats from other group members. The goal of the current study is to review previous studies examining these two key variables and to contribute new analyses, modeling within-person change in both variables and examining covariation in their growth. The current article uses data from 823 Belfast adolescents over 4 years. The results suggest youth are changing linearly over age in both constructs and that there are ethno-political group differences in how youth are changing. The results also indicate that change in insecurity is related to strength of identity at age 18, and strength of identity and emotional insecurity are related at age 18. Implications and directions for future work in the area of youth and political violence are discussed. © 2014 American Psychological Association.

Nurses' experiences providing palliative care to individuals living in rural communities aspects of the physical residential setting

Introduction: Efforts are needed to improve palliative care in rural communities, given the unique characteristics and inherent challenges with respect to working within the physical aspects of residential settings. Nurses who work in rural communities play a key role in the delivery of palliative care services. Hence, the purpose of this study was to explore nurses’ experiences of providing palliative care in rural communities, with a particular focus on the impact of the physical residential setting.

Methods: This study was grounded in a qualitative approach utilizing an exploratory descriptive design. Individual telephone interviews were conducted with 21 community nurses. Data were analyzed by thematic content analysis.

Results: Nurses described the characteristics of working in a rural community and how it influences their perception of their role, highlighting the strong sense of community that exists but how system changes over the past decade have changed the way they provide care. They also described the key role that they play, which was often termed a ‘jack of all trades’, but focused on providing emotional, physical, and spiritual care while trying to manage many challenges related to transitioning and working with other healthcare providers. Finally, nurses described how the challenges of working within the physical constraints of a rural residential setting impeded their care provision to clients who are dying in the community, specifically related to the long distances that they travel while dealing with bad weather.

Linking watershed terrain and hydrology to soil chemical properties, microbial communities and impacts on soil organic C in a humid mid-latitude forested watershed

Understanding the response of humid mid-latitude forests to changes in precipitation, temperature, nutrient cycling, and disturbance is critical to improving our predictive understanding of changes in the surface-subsurface energy balance due to climate change. Mechanistic understanding of the effects of long-term and transient moisture conditions are needed to quantify
linkages between changing redox conditions, microbial activity, and soil mineral and nutrient interactions on C cycling and greenhouse gas releases. To illuminate relationships between the soil chemistry, microbial communities and organic C we established transects across hydraulic and topographic gradients in a small watershed with transient moisture conditions. Valley bottoms tend to be more frequently saturated than ridge tops and side slopes which generally are only saturated when shallow storm flow zones are active. Fifty shallow (~36”) soil cores were collected during timeframes representative of low CO2, soil winter conditions and high CO2, soil summer conditions. Cores were subdivided into 240 samples based on pedology and analyses of the geochemical (moisture content, metals, pH, Fe species, N, C, CEC, AEC) and microbial (16S rRNA gene
amplification with Illumina MiSeq sequencing) characteristics were conducted and correlated to watershed terrain and hydrology. To associate microbial metabolic activity with greenhouse gas emissions we installed 17 soil gas probes, collected gas samples for 16 months and analyzed them for CO2 and other fixed and greenhouse gasses. Parallel to the experimental efforts our data is being used to support hydrobiogeochemical process modeling by coupling the Community Land Model (CLM) with a subsurface process model (PFLOTRAN) to simulate processes and interactions from the molecular to watershed scales. Including above ground processes (biogeophysics, hydrology, and vegetation dynamics), CLM provides mechanistic water, energy, and organic matter inputs to the surface/subsurface models, in which coupled biogeochemical reaction
networks are used to improve the representation of below-ground processes. Preliminary results suggest that inclusion of above ground processes from CLM greatly improves the prediction of moisture response and water cycle at the watershed scale.

An archaeological approach to the development of the late medieval peasant house

Archaeological excavation has provided an alternative source of evidence for the development of the late medieval peasant house. It is argued that whilst there was a significant change in building techniques in the decades around 1200 with the adoption of ground-set timbers, the most important factor which led to the survival of houses was a fall in real wages during the thirteenth century. This encouraged peasants to repair existing buildings, rather than replace them with new ones. Alternative traditions of building are also investigated. Stone construction was adopted in a number of areas of England, but in spite of the durability of the material, few medieval peasant buildings of this type have survived in use because of the failure to use lime mortar. Decisions about whether to invest in a building’s renovation will depend on the capital initially expended upon it. This interpretation is considered against the data from the fifteenth century and found to conform satisfactorily. Its implications are considered for the period between 1200 and 1350. Data collected from archaeological excavations combined with the results of dendrochronology on a growing number of closely dated standing buildings suggest that there was a significant ‘cull’ of houses in the period after 1350 as new dwellings were constructed.