Carijn Beumer

Biodiversity in my (back)yard: towards a framework for citizen engagement in exploring biodiversity and ecosystem services in residential gardens

AbstractCultural landscapes generate many ecological values. Much of the cultural landscape exists as private or semi-private domestic gardens. These domestic gardens are hidden treasures of information on small-scale urban landscape design, urban biodiversity and the relation between citizens and their direct living environments. In this paper, an indicator framework is proposed that aims to engage citizens in experiencing and exploring biodiversity and ecosystem services in their own domestic outdoor spaces. By integrating ecological and cultural factors related to garden biodiversity the framework intends to fill a gap in existing research on domestic gardens that has until now either focused on ecological factors, or on preferences of garden owners. The framework has been developed by analysing pictures of front-yards in Phoenix (AZ, USA) and Maastricht (the Netherlands). With the BIMBY [Biodiversity in My (Back) Yard] framework we aim to contribute to an inclusive trans-disciplinary and transformational dialogue on ecosystem services, green infrastructure and biodiversity conservation in the context of the sustainable development of cities.

IUCN and perspectives on biodiversity conservation in a changing world

Biodiversity conservation is not a clear-cut practice and there is no blueprint solution to the question how to best halt the loss of biological diversity. Various conservation approaches are surrounded by a variety of basic assumptions about the world, nature and the human-nature relationship. These assumptions are more often implicitly hidden in practices and discourse than purposefully produced and deployed at a conscious level. The aim of our paper is to contribute to the on-going discussion on how to halt the loss of biodiversity in a dynamic global socio-ecological system. We will present an analysis of the worldview(s) and management style(s) of the oldest and largest global conservation organization: the International Union of Nature Conservation (IUCN). Popular in many conservation organisations is the strategy of integrating conservation in policy, business and society. Our discourse analysis demonstrates that although IUCN employs a strongly pluralistic practice of conservation, it is difficult to speak of a truly integrative approach yet.

Sustainability assessment as problem structuring: three typical ways

Sustainability assessment (SA) is an increasingly popular term referring to a broad range of approaches to align decision-making with the principles of sustainability. Nevertheless, in public and private sectors sustainability results are still disappointing, and this paper reflects on this problem and proposes a way forward. We argue that, because sustainability issues are generally wicked problems (i.e. a ‘complex of interconnected factors in a pluralistic context’), effective assessments need to be reflexive about the definition of the issue and about the criteria for sustainable solutions. Based on a distinction of policy problems, we characterize SA as a form of problem structuring, and we distinguish three typical ways of problem structuring, corresponding to three different ways of integrating reflexivity in the assessment. We illustrate these routes in three examples. We discuss the way reflexivity is integrated in each example by discussing the mix of methods, SA process and epistemological balance. Rather than merely calling for more stakeholder participation, our aim is to call for more reflexivity integrated into the SA approach, and we conclude by proposing a process map for reflexive sustainability assessment to support this.

BIMBY’s first steps: a pilot study on the contribution of residential front-yards in Phoenix and Maastricht to biodiversity, ecosystem services and urban sustainability

Large parts of urban space around the world exist of small-scale plots such as domestic gardens. These small-scale urban spaces carry potential for enhancing biodiversity, sustainability and ecosystem services in and beyond cities. However, domestic gardening and residential garden designs are often guided by aesthetics and ease more than by the aim to create habitat and biological diversity. Yard-management decisions impact socio-ecological systems in various ways, for example through irrigation patterns, fertilization or the use of pesticides or through the choice for exotic species that may become invasive over time. Yard-management decisions can also positively influence the presence of pollinators, improve soil quality or even foster small scale ‘Wildlife Habitats’ that can function as ecological stepping stones to the wider environment. In this paper a pilot assessment is presented of the contribution of residential front-yards in Phoenix (Arizona) and Maastricht (The Netherlands) to biodiversity, ecosystem services and sustainability by applying the BIMBY (Biodiversity in My (Back) Yard) framework.

Mapping drinking water and quality of life aspects in urban settings: an application of the urban exposome

Cities face rapid changes leading to increasing inequalities and emerging public health issues that require cost-effective interventions. The urban exposome framework constitutes a novel approach in tackling city-wide challenges, such as those of drinking water quality and quality of life. In this proof-of-concept study, we presented part of the urban exposome of Limassol (Cyprus) focusing on chemical and microbial drinking water quality parameters and their association with urban neighborhood indicators. A perceptions study and an urban population study was conducted. We mapped the water quality parameters and participants’ opinions on city life (i.e. neighborhood life, health care and green space access) using quarters (small administrative areas) as the reference unit of the city. In an exploratory environment-wide association study analysis, we used all variables (questionnaire responses and water quality metrics) to describe correlations between them accounting, also, for self-reported health status. Overall, urban drinking-water quality using conventional indicators of chemical (disinfection byproducts-trihalomethanes) and microbial (coliforms, E. coli, and Enterococci) quality did not raise particular concerns. The general health and chronic health status of the urban participants were significantly (all >FDR corrected p value of 0.1) associated with different health conditions such as hypertension and asthma, or having financial issues in access to dental care. Additionally, correlations between trihalomethanes and participant characteristics (e.g. household cleaning, drinking water habits) were documented. This proof-of-concept study showed the potential of using integrative approaches to develop urban exposomic profiles and identifying within-city differentiated environmental and health indicators. The characterization of the urban exposome of Limassol will be expanded via the inclusion of biomonitoring tools and untargeted metabolomics platforms.