Do contaminants originating from state-of-the-art treated wastewater impact the ecological quality of surface waters?

Since the 1980s, advances in wastewater treatment technology have led to considerably improved surface water quality in the urban areas of many high income countries. However, trace concentrations of organic wastewater-associated contaminants may still pose a key environmental hazard impairing the ecological quality of surface waters. To identify key impact factors, we analyzed the effects of a wide range of anthropogenic and environmental variables on the aquatic macroinvertebrate community. We assessed ecological water quality at 26 sampling sites in four urban German lowland river systems with a 0–100% load of state-of-the-art biological activated sludge treated wastewater. The chemical analysis suite comprised 12 organic contaminants (five phosphor organic flame retardants, two musk fragrances, bisphenol A, nonylphenol, octylphenol, diethyltoluamide, terbutryn), 16 polycyclic aromatic hydrocarbons, and 12 heavy metals. Non-metric multidimensional scaling identified organic contaminants that are mainly wastewater-associated (i.e., phosphor organic flame retardants, musk fragrances, and diethyltoluamide) as a major impact variable on macroinvertebrate species composition. The structural degradation of streams was also identified as a significant factor. Multiple linear regression models revealed a significant impact of organic contaminants on invertebrate populations, in particular on Ephemeroptera, Plecoptera, and Trichoptera species. Spearman rank correlation analyses confirmed wastewater-associated organic contaminants as the most significant variable negatively impacting the biodiversity of sensitive macroinvertebrate species. In addition to increased aquatic pollution with organic contaminants, a greater wastewater fraction was accompanied by a slight decrease in oxygen concentration and an increase in salinity. This study highlights the importance of reducing the wastewater-associated impact on surface waters. For aquatic ecosystems in urban areas this would lead to: (i) improvement of the ecological integrity, (ii) reduction of biodiversity loss, and (iii) faster achievement of objectives of legislative requirements, e.g., the European Water Framework Directive

What determines how we see nature? Perceptions of naturalness in designed urban green spaces

1. The multiple benefits of ‘nature’ for human health and well-being have been documented at an increasing rate over the past 30 years. A growing body of research also demonstrates the positive well-being benefits of nature-connectedness. There is, however, a lack of evidence about how people's subjective nature experience relates to deliberately designed and managed urban green infrastructure (GI) with definable ‘objective’ characteristics such as vegetation type, structure and density. Our study addresses this gap.2. Site users (n = 1411) were invited to walk through woodland, shrub and herbaceous planting at three distinctive levels of planting structure at 31 sites throughout England, whilst participating in a self-guided questionnaire survey assessing reactions to aesthetics, perceived plant and invertebrate biodiversity, restorative effect, nature-connectedness and socio-demographic characteristics.3. There was a significant positive relationship between perceived naturalness and planting structure. Perceived naturalness was also positively related to the perceived plant and invertebrate biodiversity value, participants’ aesthetic appreciation and the self-reported restorative effect of the planting. A negative relationship was recorded between perceived naturalness and perceived tidiness and care. Our findings showed that participants perceived ‘naturalness’ as biodiverse, attractive and restorative, but not necessarily tidy. Perceived naturalness was also related to participants’ educational qualifications, gender and nature-connectedness, with women and more nature-connected participants perceiving significantly greater levels of naturalness in the planting.4. These findings are highly significant for policymakers and built environment professionals throughout the world aiming to design, manage and fund urban GI to achieve positive human health and biodiversity outcomes. This applies particularly under austerity approaches to managing urban green spaces where local authorities have experienced cuts in funding and must prioritise and justify GI maintenance practices and regimes

Biodiversity and health in the urban environment

Biodiversity underpins urban ecosystem functions that are essential for human health and well-being. Understanding how biodiversity relates to human health is a developing frontier for science, policy and practice. This article describes the beneficial, as well as harmful, aspects of biodiversity to human health in urban environments. Recent research shows that contact with biodiversity of natural environments within towns and cities can be both positive and negative to human physical, mental and social health and well-being. For example, while viruses or pollen can be seriously harmful to human health, biodiverse ecosystems can promote positive health and well-being. On balance, these influences are positive. As biodiversity is declining at an unprecedented rate, research suggests that its loss could threaten the quality of life of all humans. A key research gap is to understand-and evidence-the specific causal pathways through which biodiversity affects human health. A mechanistic understanding of pathways linking biodiversity to human health can facilitate the application of nature-based solutions in public health and influence policy. Research integration as well as cross-sector urban policy and planning development should harness opportunities to better identify linkages between biodiversity, climate and human health. Given its importance for human health, urban biodiversity conservation should be considered as public health investment

What is urban nature and how do we perceive it?

This chapter discusses the complexities and apparent contradictions in defining ‘nature’ and ‘urban nature’ in the context of human-nature interactions. It explains why urban nature is so important to human health and well-being at this point in the twenty first century, focusing particularly on why considering nature perception is crucial if we are to plan, design and manage urban nature to prioritise people’s aesthetic appreciation, health and well-being. Nature-perceptions are then framed in relation to diversity in nature: the role of varying biodiversity, perceived biodiversity and different aesthetics of nature (specifically flowering and colour , structure and care). The significance of varying socio-cultural and geographical contextual factors in nature perception is then highlighted. The chapter closes by addressing implications for policy and practice and future research directions in relation to urban nature perception . The author draws extensively from her own and related research

Review of the Mental Health and Well-being Benefits of Biodiversity

Little is known about the contribution that biodiversity has on mental health and well-being. To date, only one systematic review has investigated the health and well-being benefits from contact with biodiversity (Lovell et al. J Toxicol Environ Health B Crit Rev 17(1):1–20, 2014). The number of research studies investigating the health and well-being effects of biodiversity has increased since this publication. Here, we provide an update, focusing on the impact of biodiversity on mental health and well-being. Our objectives are to: (i) identify and describe the literature published after 2012; and (ii) synthesise all results from Lovell et al. (J Toxicol Environ Health B Crit Rev 17(1):1–20, 2014) and the more recently published literature to assess whether biodiversity influences mental health and well-being. Sixteen recently published studies met the inclusion criteria. The literature is varied with different study designs, measures of biodiversity, mental health and well-being. The synthesis of results was drawn from 24 studies: nine from Lovell et al. (J Toxicol Environ Health B Crit Rev 17(1):1–20, 2014) and 15 identified by this chapter. There is some evidence to suggest that biodiversity promotes better mental health and well-being. However, more studies reported non-significant results. The evidence is not yet of the extent necessary to characterise the role of biodiversity in relation to mental health or well-being. Future interdisciplinary research directions are discussed

Recreational ecosystem services in European cities: Sociocultural and geographical contexts matter for park use

The role of urban parks in delivering cultural ecosystem services related to outdoor recreation is widely acknowledged. Yet, the question remains as to whether the recreational opportunities of parks meet the demands of increasingly multicultural societies and whether recreational patterns vary at spatial scales. In a pan-European survey, we assessed how people use urban parks (in five cities, N = 3814) and how recreational patterns relate to respondents’ sociocultural and geographical contexts (using 19 explanatoryvariables). Our results show that across Europe (i) respondents share a general pattern in their recreational activities with a prevalence for the physical uses of parks, especially taking a walk; (ii) the geographic context matters, demonstrating a high variety of uses across the cities; and that (iii) the sociocultural context is also important; e.g., the occupation and biodiversity valuations of respondents are significantly associated with the uses performed. The sociocultural context matters particularly for physical park uses and is associated to a lesser extent with nature-related uses. Given that our results attest to a high variety of park uses between sociocultural groups and the geographical context, we conclude that it is important to consider the specific backgrounds of people to enhance recreational ecosystem services ingreenspace development

Recreational ecosystem services in European cities: Sociocultural and geographical contexts matter for park use : Assessment and Valuation of Recreational Ecosystem Services

The role of urban parks in delivering cultural ecosystem services related to outdoor recreation is widely acknowledged. Yet, the question remains as to whether the recreational opportunities of parks meet the demands of increasingly multicultural societies and whether recreational patterns vary at spatial scales. In a pan-European survey, we assessed how people use urban parks (in five cities, N = 3814) and how recreational patterns relate to respondents’ sociocultural and geographical contexts (using 19 explanatory variables). Our results show that across Europe (i) respondents share a general pattern in their recreational activities with a prevalence for the physical uses of parks, especially taking a walk; (ii) the geographic context matters, demonstrating a high variety of uses across the cities; and that (iii) the sociocultural context is also important; e.g., the occupation and biodiversity valuations of respondents are significantly associated with the uses performed. The sociocultural context matters particularly for physical park uses and is associated to a lesser extent with nature-related uses. Given that our results attest to a high variety of park uses between sociocultural groups and the geographical context, we conclude that it is important to consider the specific backgrounds of people to enhance recreational ecosystem services in greenspace development

Recreational ecosystem services in European cities: Sociocultural and geographical contexts matter for park use

The role of urban parks in delivering cultural ecosystem services related to outdoor recreation is widely acknowledged. Yet, the question remains as to whether the recreational opportunities of parks meet the demands of increasingly multicultural societies and whether recreational patterns vary at spatial scales. In a pan-European survey, we assessed how people use urban parks (in five cities, N = 3814) and how recreational patterns relate to respondents’ sociocultural and geographical contexts (using 19 explanatory variables). Our results show that across Europe (i) respondents share a general pattern in their recreational activities with a prevalence for the physical uses of parks, especially taking a walk; (ii) the geographic context matters, demonstrating a high variety of uses across the cities; and that (iii) the sociocultural context is also important; e.g., the occupation and biodiversity valuations of respondents are significantly associated with the uses performed. The sociocultural context matters particularly for physical park uses and is associated to a lesser extent with nature-related uses. Given that our results attest to a high variety of park uses between sociocultural groups and the geographical context, we conclude that it is important to consider the specific backgrounds of people to enhance recreational ecosystem services in greenspace development

Integrating biodiversity, remote sensing, and auxiliary information for the study of ecosystem functioning and conservation at large spatial scales

Assessing patterns and processes of plant functional, taxonomic, genetic, and structural biodiversity at large scales is essential across many disciplines, including ecosystem management, agriculture, ecosystem risk and service assessment, conservation science, and forestry. In situ data housed in databases necessary to perform such assessments over large parts of the world are growing steadily. Integrating these in situ data with remote sensing (RS) products helps not only to improve data completeness and quality but also to account for limitations and uncertainties associated with each data product. Here, we outline how auxiliary environmental and socioeconomic data might be integrated with biodiversity and RS data to expand our knowledge about ecosystem functioning and inform the conservation of biodiversity. We discuss concepts, data, and methods necessary to assess plant species and ecosystem properties across scales of space and time and provide a critical discussion of outstanding issues