Large trees are keystone structures in urban parks

Large trees are considered keystone structures in agricultural and forestry production landscapes, but research demonstrating this in urban landscapes is urgently needed. If large trees are keystone structures in urban parks, it is imperative that this is recognized in policy to ensure their ongoing existence. We studied the role of large native trees for birds in urban parks in Canberra, Australia. We found that (1) large trees had a consistent, strong, and positive relationship with five measures of bird diversity, and (2) as trees became larger in size, their positive effect on bird diversity increased. Large urban trees are therefore keystone structures that provide crucial habitat resources for wildlife. Hence, it is vital that they are managed appropriately. With evidence-based tree preservation policies that recognize biodiversity values, and proactive planning for future large trees, the protection and perpetuation of these important keystone structures can be achieved

Vegetation structure moderates the effect of fire on bird assemblages in a heterogeneous landscape

Ecological theory predicting the impact of fire on ecological communities is typically focused on post-disturbance recovery processes or on disturbance-diversity dynamics. Yet the established relationship between vegetation structure and animal diversit

Ultra-infra: Becoming Skin

This demonstration showcases outcomes from a program of research that seeks to expand the practice of painting through the exploitation of new digital technologies. Through virtual reality and digital painting processes, this research interrogates the nature of materiality by considering the hidden realities of human skin. The demonstration is in the form of a VR-based artwork delivered on a Windows Mixed Reality headset

Cross-sectional and temporal relationships between bird occupancy and vegetation cover at multiple spatial scales

Scale is a key concept in ecology, but the statistically based quantification of scale effects has often proved difficult. This is exemplified by the challenges of quantifying relationships between biodiversity and vegetation cover at different spatial scales to guide restoration and conservation efforts in agricultural environments. We used data from 2002 to 2010 on 184 sites (viz., site scale) nested within 46 farms (the farm scale), nested within 23 landscapes (the landscape scale). We found cross-sectional relationships with the amount of vegetation cover that were typically positive for woodland birds and negative for open-country birds. However, for some species, relationships differed between spatial scales, suggesting differences in nesting and foraging requirements. There was a 3.5% increase in the amount of native vegetation cover in our study region between 2002 and 2010, and our analyses revealed that some open country species responded negatively to these temporal changes, typically at the farm and/or site scale, but not the landscape scale. Species generally exhibited stronger cross-sectional relationships with the amount of vegetation cover than relationships between changes in occupancy and temporal changes in vegetation cover. This unexpected result can be attributed to differences in habitat use by birds of existing vegetation cover (typically oldgrowth woodland) vs. plantings and natural regeneration, which are the main contributors to temporal increases in vegetation cover. By taking a multi-scaled empirical approach, we have identified species-specific, scale-dependent responses to vegetation cover. These findings are of considerable practical importance for understanding which species will respond to different scales of protection of existing areas of native vegetation, efforts to increase the amount of native vegetation over time, and both approaches together

Linking bird species traits to vegetation characteristics in a future urban development zone: implications for urban planning

Identifying the relationships between species traits and patch-scale vegetation characteristics in areas designated for urban development can improve our understanding of how animal communities may change with urbanization. We explored the implications o

The Doing and Undoing of the “Autistic Child”: Cutting Together and Apart Interview-based Empirical Materials

This article discusses how posthuman and new materialist theories afford us opportunities to rethink the production of the “autistic child,” drawing on a qualitative research project on parenthood in the context of childhood disability in Italy. We will put some Baradian’s key concepts (intra-action, agential cut and cutting together-apart) to work in glancing at the complexities we keep encountering when a mother, Arianna, describes her relationship with her daughter Laura. The aim of this article is twofold: first, to methodologically re-turn the production of the “autistic child,” and second, to rethink and unsettle the dichotomies that constitute some children as “disabled human beings,” abnormal, and undesirable

Ecological connectivity in the three-dimensional urban green volume using waveform airborne lidar

This is the final version. Available on open access from Nature Research via the DOI in this record.The movements of organisms and the resultant flows of ecosystem services are strongly shaped by landscape connectivity. Studies of urban ecosystems have relied on two-dimensional (2D) measures of greenspace structure to calculate connectivity. It is now possible to explore three-dimensional (3D) connectivity in urban vegetation using waveform lidar technology that measures the full 3D structure of the canopy. Making use of this technology, here we evaluate urban greenspace 3D connectivity, taking into account the full vertical stratification of the vegetation. Using three towns in southern England, UK, all with varying greenspace structures, we describe and compare the structural and functional connectivity using both traditional 2D greenspace models and waveform lidar-generated vegetation strata (namely, grass, shrubs and trees). Measures of connectivity derived from 3D greenspace are lower than those derived from 2D models, as the latter assumes that all vertical vegetation strata are connected, which is rarely true. Fragmented landscapes that have more complex 3D vegetation showed greater functional connectivity and we found highest 2D to 3D functional connectivity biases for short dispersal capacities of organisms (6 m to 16 m). These findings are particularly pertinent in urban systems where the distribution of greenspace is critical for delivery of ecosystem services.This work was funded under the NERC Biodiversity and Ecosystem Services Sustainability (BESS) thematic programme for the ‘Fragments Functions and Flows in Urban Ecosystems’ project (Reference: NE/J015237/1; http://bess-urban.group.shef.ac.uk/). The waveform ALS data were acquired by the NERC Airborne Research and Survey Facility (ARSF) and the team from the ARSF Data Analysis Node at Plymouth Marine Laboratory is acknowledged for undertaking initial ALS processing

Affirmative critique as minor qualitative critical inquiry: A storying of a becoming critical engagement with what happens

In response to the evolving nature of scholarly exchange and collaboration, University of California Press allows its authors to post preprints and postprints on authors' personal websites, and within institutional repositories. You may use the Publisher-generated PDF, and you must display the following Publisher's Statement in tandem with posting: Published as [Andersen, Camilla Eline. (2017). Affirmative critique as minor qualitative critical inquiry: A storying of a becoming critical engagement with what happens. International review of Qualitative Research, 10(4), 430-449. doi: http://dx.doi.org10.1525/irqr.2017.10.4.430]. © [2017] by [the Regents of the University of California/Sponsoring Society or Association]. Copying and permissions notice: Authorization to copy this content beyond fair use (as specified in Sections 107 and 108 of the U. S. Copyright Law) for internal or personal use, or the internal or personal use of specific clients, is granted by [the Regents of the University of California/on behalf of the Sponsoring Society] for libraries and other users, provided that they are registered with and pay the specified fee via Rightslink® or directly with the Copyright Clearance Center (http://www.copyright.com/).publishedVersio