Biodiversity and Health in the Face of Climate Change

We are at a point in history marked by unprecedented changes in the environmental foundations of human health and well-being. At the same time, the demands from human populations have never been greater, with profound differences in how we engage with the natural environment. By the middle of this century, when climate change impacts are further increasing, the United Nations expects the global population to be approaching 10 billion. In this chapter, we provide a synthesis of published evidence of the complex and important relationships between elements of biodiversity, health and climate change. We draw primarily on reviews conducted in the past five years supplemented with evidence on additional themes. We also develop a detailed case study example focused on urban climate, climate change and biodiversity, taken from the perspective of a large and representative conurbation. The case study uses a body of existing published evidence together with new data and insights to demonstrate important pathways, impacts and outcomes. We end by identifying a set of research questions and stress the need for even more extensive multi-disciplinary and multi-sector approaches. Nevertheless, despite the need for more knowledge, it is already clear that more effective action could, and should, be taken.

This chapter reviews the emerging importance of pollen allergies in relation to ongoing climate change. Allergic diseases have been increasing in prevalence over the last decades, partly as the result of the impact of climate change. Increased sensitisation rates and more severe symptoms have been the partial outcome of: increased pollen production of wind-pollinated plants resulting in long-term increased abundance of pollen in the air we breathe; earlier shifts of airborne pollen seasons making occurrence of allergic symptoms harder to predict and deal with efficiently; increased allergenicity of pollen causing more severe health effects in allergic individuals; introduction of new, invasive allergenic plant species causing new sensitisations; environment-environment interactions, such as plants and hosted microorganisms, i.e. fungi and bacteria, which comprise a complex and dynamic system, with additive, presently unforeseeable influences on human health; environment-human interactions, as the consequence of a combination of environmental factors, like air pollution, global warming, urbanisation and microclimatic variability, which create a multi-resolution spatiotemporal system that requires new processing technologies and huge data inflow in order to be thoroughly investigated. We suggest that novel, real-time, personalised pollen information services, like mobile-app risk alerts, must be developed to provide the optimum first line of allergy management.

Vector-borne diseases (VBDs) are illnesses caused by parasites, viruses or bacteria that are transmitted by a vector such as mosquitoes, ticks, sandflies, triatomine bugs, tsetse flies, fleas, black flies, aquatic snails and lice. In this chapter, we aim to show how climate change impacts VBDs and what role biodiversity (and its loss) plays for VBDs. (1) We show how climatic changes shape the distribution and abundance of disease vectors. To point out current triple vulnerabilities regarding climate change, biodiversity and VBDs, we selected ticks and mosquitoes as examples. (2) We point out important knowledge gaps on VBDs and biodiversity, which make prognoses for VBDs under climate change challenging. (3) We review vector control tools as well as policy options and related infrastructural responses to manage VBDs under climate and biodiversity changes.

Green spaces can help preventing potential negative health outcomes from climate change and urbanisation. Urban green spaces may reduce cardiovascular diseases exaggerated by heat stress or noise because of their climate regulation and noise-buffering potential. Urban green space may also promote physical activity and social interactions, and thus improve the physical and mental health of residents who tend to be more stressed in urban environments. Research findings on associations between urban green space and health outcomes are, however, not consistent, and potential relationships are often affected by confounding factors. In this chapter, a systematic review of the association between urban green space and health is presented, with a particular focus on socio-economic and socio-demographic confounders that may over-ride potential associations. Results show that there is some positive effect of urban green space on mental health and cardiovascular diseases. However, evidence is weak as many other studies show that socio-economic confounders, such as household income or neighbourhood deprivation, have the highest impact. The mediating effect of urban green space to decrease health inequality among different socio-economic groups may be more important. Based on the results of the review, conclusions are drawn on how to design green space that is beneficial for the health and well-being of all population groups including the vulnerable groups of children, the elderly and deprived people. This field of research is growing, and important prospects for future research on urban green and health are highlighted.

The ongoing urbanisation worldwide has led to an increasing number of children living in urban areas. Urban children, compared to children from rural areas, are generally exposed to higher levels of a number of environmental hazards such as air pollution, noise and heat, and have limited access to natural environments, including green spaces. At the same time, urban lifestyle is predominantly associated with lower levels of physical activity and higher exposure to crime and psychological stress. Contact with green spaces, on the other hand, is thought to have a defining role in human brain development. An accumulating body of evidence has also associated such contact with improved mental and physical health in children. This chapter aims to present a synopsis of the current state-of-the-art of research linking green space and child health and development. Towards this aim, we (1) elaborate on potential mechanisms underlying health effects of green spaces, (2) highlight the importance of prenatal and postnatal periods as windows of vulnerability, and (3) provide an overview of the available evidence on effects of green spaces on (a) pregnancy outcomes, (b) brain development including structural brain development, as well as behavioural and cognitive development, (c) respiratory and allergic conditions, and (d) cardiometabolic risk factors.

This chapter briefly describes six frameworks that offer perspective on the relationships between biodiverse natural environments and mental well-being. The aim of this chapter is to provide an overview of these frameworks to enable theoretical grounding of future biodiversity and mental well-being studies. The frameworks are largely from the field of environmental psychology and represent the majority of theories used in biodiversity and health research (The Preference Matrix; fractal geometry; the Biophilia Hypothesis; Stress Reduction Theory; Attention Restoration Theory; and Ecosystem Service Cascade Model). A general overview of each framework discusses its conceptualisation of biodiversity and mental well-being outcomes, with supporting empirical research. The chapter then summarises the six frameworks with regard to their hypotheses for biodiversity and mental well-being.

In this chapter the concept of biodiversity and its measurement and use in ‘biodiversity – mental health’ research is discussed, as well as access to and contact with biodiverse nature. It is pointed out that biodiversity is an ecological concept that originated in the context of nature conservation. It has evolved without consideration of its potential role in mental health promotion. In studying the latter, the concept of biodiversity is frequently adapted. Such adaptations are likely to occur at the expense of its relevance for nature conservation. Using the concept of biodiversity as originally intended may be fruitful for a different type of research question, focusing more on multi-functionality issues: can the same nature constitute a healthy, biodiverse ecosystem and enhance mental health simultaneously? By pointing out this and related issues, this chapter aims to support researchers and students in future research, and help both scientists and policy-makers to position and assess studies in this field.

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.

Among government agencies, practitioners and researchers there is growing interest in the potential of natural environments for human health and well-being. In parallel, conserving biodiversity is seen as critical in this effort. Likewise, spiritual well-being is increasingly considered as an important dimension of human health. This chapter examines the inter-relationship between biodiversity and spiritual well-being. We first consider what spiritual well-being is. Then, based on a review of literature, we discuss four themes that illustrate biodiversity and spiritual well-being relationships, including: (i) influence of spiritual traditions on biodiversity; (ii) sacred places as repositories of biodiversity; (iii) the spiritual domain within ecosystems services; and (iv) the effects of biodiversity on spiritual well-being. We bring these strands together in a conceptual model and discussion of measurement issues that can inform future research.

A biodiverse natural environment is a health-promoting resource. A given habitat can simultaneously provide multiple ecosystem (and therefore health) benefits, both directly through, for example, flood risk mitigation and cooling, and indirectly as a resource for cultural and physical activities. The single biggest priority for public health is to work across governments and countries to protect biodiverse natural resources and introduce measures to stem climate change. At a more local level, public health professionals are responsible for devising strategies to promote sustainable lifestyles and facilitate access to natural environments. Modern public health emphasises the reduction of avoidable differences in ill health between the most and least well-off in society. Such strategies therefore need to target those from socio-economically deprived areas, who are most at risk of ill health. Schemes such as nature-based social prescribing or community referral give local commissioners of health services the opportunity to bring people into contact with nature. Those with responsibility for the provision of nature-based schemes should be encouraged to use interventions that bring people into active, rather than passive, contact with nature. Further, targeting such interventions towards exposure to environments with the greatest biodiversity is likely to offer the greatest benefits for human health.

The human health and well-being benefits of contact with nature are becoming increasingly recognised and well understood, yet the implications of nature experiences for biodiversity conservation are far less clear. Theoretically, there are two plausible pathways that could lead to positive conservation outcomes. The first is a direct win-win scenario where biodiverse areas of high conservation value are also disproportionately beneficial to human health and well-being, meaning that the two sets of objectives can be simultaneously and directly achieved, as long as such green spaces are safeguarded appropriately. The second is that experiencing nature can stimulate people’s interest in biodiversity, concern for its fate, and willingness to take action to protect it, therefore generating conservation gains indirectly. To date, the two pathways have rarely been distinguished and scarcely studied. Here we consider how they may potentially operate in practice, while acknowledging that the mechanisms by which biodiversity might underpin human health and well-being benefits are still being determined.

Techno-industrial societies face biophysical limits and the consequences of disrupting Earth’s ecosystems. This creates a new behavioural context with an unmistakable demand: Citizens of such societies must turn from seeking new resources to crafting new living patterns that function well within finite ecosystems. This coming transition is inevitable, but our response is not preordained. Indeed, given the complex, multi-decade-long context, the required pro-environmental behaviours cannot be fully known in advance. Furthermore, the urgency to respond will necessitate that whole clusters of behaviour be adopted; incremental and serial change will not suffice. Thus, a culture of small experiments must be nurtured. The process of change will seriously tax social, emotional and attentional capacities. Thus, priority is placed on emotional stability and clear-headedness, maintaining social relationships while stressed, pro-actively managing behaviour and a willingness to reskill. These aspects of coping share a common foundation: the maintenance of attentional vitality and psychological well-being. Changes also must occur in how pro-environmental behaviours are promoted. We must move beyond interventions that are expert-driven, modest in request, serial in implementation and short-term in horizon. New interventions must create the conditions under which citizens become behavioural entrepreneurs, themselves creating, managing and sharing successful approaches to behaviour change.

This chapter highlights key policy processes at the international level dealing with the alignment of policies for the biodiversity-climate-health nexus. Recent developments by UN Conventions and major international organisations, such as the Convention on Biological Diversity, the Ramsar Convention and the United Nations Framework Convention on Climate Change (UNFCCC), together with the World Health Organization (WHO) and the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), are discussed. Special attention is given to newly emerging integrative global policy processes and partnerships between the Convention on Biological Diversity and the WHO, also in the framework of the Agenda 2030 for Sustainable Development and avenues to translate them into local policy through the global partnership ICLEI – Local Governments for Sustainability. Conclusions are drawn to foster the joint implementation of policy goals.

Attention to the importance of nature and human health linkages has increased in the past years, both in science and in policy. While knowledge about and recognition of the importance of nature and human health linkages are increasing rapidly, challenges still remain. Among them are building bridges between relevant but often still somewhat disconnected sectors and topics. There is a need to bring together researchers in the fields of health sciences, ecology, social sciences, sustainability sciences and other interdisciplinary sciences, as well as for cooperation between governments, companies and citizens. In this chapter, we introduce European networking initiatives aimed at building such bridges.

Biodiversity and healthy natural ecosystems, including protected areas in and around cities, provide ecosystem benefits and services that support human health, including reducing flood risk, filtering air pollutants, and providing a reliable supply of clean drinking water. These services help to reduce the incidence of infectious diseases and respiratory disorders, and assist with adaptation to climate change. Access to nature offers many other direct health benefits, including opportunities for physical activity, reduction of developmental disorders and improved mental health. Economic valuations of green spaces in several cities globally have found that nature provides billions of dollars in cost savings for health services. Protected areas are increasingly common in, and around, cities to protect biodiversity and ecosystem services, including these benefits for health. Many cities are also launching programmes to enhance the health and environmental benefits of parks, based on a model of Healthy Parks, Healthy People, by Parks Victoria in Australia. Partnerships between conservationists, city planners and health authorities are critical to maximise these benefits. In some places, medical professionals prescribe time in nature, and some cities specify standards for urban green spaces to enhance their health benefits. The United Nations Sustainable Development Goals provide an important global framework for such partnerships from global to local level.

As populations become increasingly urbanised, the preservation of urban green space becomes paramount. Despite the potential from cross-sectional evidence, we know little about how to design new, or improve or promote existing, urban green space for environmental, health and well-being benefits. This chapter highlights aspects to be considered when designing and evaluating urban green space interventions that aim to maximize environmental, social and health benefits, and address equity issues. Based on a review of international research evidence and a compilation of European case studies, the chapter addresses the variety of green space intervention approaches and their related impacts. There was strong evidence to support park-based and greenway/trail interventions employing a dual-approach (i.e. a physical change to the urban green space and promotion/marketing programmes particularly for park use and physical activity); strong evidence for the greening of vacant lots for health, well-being (e.g. reduction in stress) and social (e.g. reduction in crime) outcomes; strong evidence for the provision of urban street trees and green infrastructure for storm water management for environmental outcomes (e.g. increased biodiversity, reduced air pollution, climate change adaptation). Urban green space has an important role to play in creating a culture of health and well-being. Results show promising evidence to support the use of certain urban green space interventions for health, social and environmental benefits. The findings have important implications for policymakers, practitioners and researchers.

Cities are experiencing multiple impacts from global environmental change, and the degree to which they will need to cope with and adapt to these challenges will continue to increase. We argue that a ‘complex systems and resilience management’ view may significantly help guide future urban development through innovative integration of, for example, grey, blue and green infrastructure embedded in flexible institutions (both formal and informal) for multi-functionality and improved health. For instance, the urban heat island effect will further increase city-centre temperatures during projected more frequent and intense heat waves. The elderly and people with chronic cardiovascular and respiratory diseases are particularly vulnerable to heat. Integrating vegetation and especially trees in the urban infrastructure helps reduce temperatures by shading and evapotranspiration. Great complexity and uncertainty of urban social-ecological systems are behind this heatwave-health nexus, and they need to be addressed in a more comprehensive manner. We argue that a systems perspective can lead to innovative designs of new urban infrastructure and the redesign of existing structures. Particularly to promoting the integration of grey, green and blue infrastructure in urban planning through institutional innovation and structural reorganization of knowledge-action systems may significantly enhance prospects for improved urban health and greater resilience under various scenarios of climate change.

Aims and measures in landscape planning often align with aims for positive health outcomes, even if these are not explicitly mentioned in the planning documents. This chapter examines whether, and if so how, health issues are already being tackled in formal and informal landscape planning instruments in Germany and the UK at present and how this could be enhanced in the future. Thus, the focus is on planning issues, practice and methods. In addition, health-promoting features of green spaces, regarding both single green spaces and entire green space systems, are considered, as well as a method for planning greenway systems for daily physical mobility. Addressing health issues in landscape planning is a necessary part of sustainable planning in order to be able to cope with future developments, such as increasing climate change impacts and accelerating societal changes. For this reason, interdisciplinary corporation between landscape planning and the health sector should be strengthened.

Increases in non-communicable diseases, biodiversity loss and climate change are among the greatest global challenges society is facing today. At the same time, biodiverse natural environments can buffer the negative effects of climate change to society and support human health. Contributions in this volume demonstrate the growing interest in the impact of biodiversity on human health and well-being in the face of climate change. The chapters in this volume present and critically review the growing body of literature on the associations of biodiversity and human health, with mounting evidence of positive effects for physical health and well-being. In this concluding chapter, we summarise the key outcomes of the chapters in this book. Synthesising the main results with a link to current policy, we develop recommendations to address the urgent health and sustainability challenges in science, policy and practice.