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\"'The IPCC's Fifth Assessment Report (2014) has highlighted the importance of urban areas in mitigating emissions of greenhouse gases. Urban centres are also subject to the impacts of climate change. Hence governance for urban sustainability and resilience needs to be developed to deal with the challenge of climate change in the future and its impacts on urban locations. This book is a rich repository of knowledge and information on this subject of growing relevance.'--Rajendra Pachauri, Chairman of the Intergovernmental Panel on Climate Change (IPCC) and Professor, Yale Climate and Energy Institute, Yale School of Forestry and Environmental Studies, US. 'This book provides a timely overview of the range of government intervention models in the policy domain of urban sustainability. Combining the two closely related, but usually separated, policy objectives of Sustainability and Resilience has particular utility. Having good ideas about how to save the planet are necessary but if we can't use governance tools to deliver them, we have no hope.'--Peter Newman, Curtin University, Australia. Cities, and the built environment more broadly, are key in the global response to climate change. This groundbreaking book seeks to understand what governance tools are best suited for achieving cities that are less harmful to the natural environment, are less dependent on finite resources, and can better withstand human-made hazards and climate risks. In mapping, describing and evaluating nearly 70 traditional and highly innovative governance tools from Asia, Australia, Europe and North America, Jeroen van der Heijden uncovers the five most eminent contemporary trends in governance for urban sustainability and resilience. He also develops a series of 12 design principles that will help to develop better governance tools for improving the sustainability and resilience of today's cities and those of the future. The book is unique in drawing lessons from the theoretical literature on environmental and hazard governance into a broad empirical study. The book will be of great interest to scholars in the field of urban governance, urban planning, sustainable development and resilience, environmental and hazard governance, and climate risk adaptation and mitigation. It will also appeal to students, policymakers and organisations involved with environmental policy and governance\"--Page 4 of cover.

Learn about species, environments, ecosystems and biodiversity in The Ecology Book.Part of the fascinating Big Ideas series, this book tackles tricky topics and themes in a simple and easy to follow format.

Traditional economic theory could not explain, much less predict, the near collapse of the financial system and its long-lasting effects on the global economy. Since the 2008 crisis, there has been increasing interest in using ideas from complexity theory to make sense of economic and financial markets. Concepts, such as tipping points, networks, contagion, feedback, and resilience have entered the financial and regulatory lexicon, but actual use of complexity models and results remains at an early stage. Recent insights and techniques offer potential for better monitoring and management of highly interconnected economic and financial systems and, thus, may help anticipate and manage future crises.

The idea that noncrop habitat enhances pest control and represents a win–win opportunity to conserve biodiversity and bolster yields has emerged as an agroecological paradigm. However, while noncrop habitat in landscapes surrounding farms sometimes benefits pest predators, natural enemy responses remain heterogeneous across studies and effects on pests are inconclusive. The observed heterogeneity in species responses to noncrop habitat may be biological in origin or could result from variation in how habitat and biocontrol are measured. Here, we use a pest-control database encompassing 132 studies and 6,759 sites worldwide to model natural enemy and pest abundances, predation rates, and crop damage as a function of landscape composition. Our results showed that although landscape composition explained significant variation within studies, pest and enemy abundances, predation rates, crop damage, and yields each exhibited different responses across studies, sometimes increasing and sometimes decreasing in landscapes with more noncrop habitat but overall showing no consistent trend. Thus, models that used landscape-composition variables to predict pest-control dynamics demonstrated little potential to explain variation across studies, though prediction did improve when comparing studies with similar crop and landscape features. Overall, our work shows that surrounding noncrop habitat does not consistently improve pest management, meaning habitat conservation may bolster production in some systems and depress yields in others. Future efforts to develop tools that inform farmers when habitat conservation truly represents a win–win would benefit from increased understanding of how landscape effects are modulated by local farm management and the biology of pests and their enemies.

The heart of the scientific enterprise is a rational effort to understand the causes behind the phenomena we observe. In large-scale complex dynamical systems such as the Earth system, real experiments are rarely feasible. However, a rapidly increasing amount of observational and simulated data opens up the use of novel data-driven causal methods beyond the commonly adopted correlation techniques. Here, we give an overview of causal inference frameworks and identify promising generic application cases common in Earth system sciences and beyond. We discuss challenges and initiate the benchmark platform causeme.net to close the gap between method users and developers. Questions of causality are ubiquitous in Earth system sciences and beyond, yet correlation techniques still prevail. This Perspective provides an overview of causal inference methods, identifies promising applications and methodological challenges, and initiates a causality benchmark platform.

Policies may influence large-scale behavioral tipping Climate change, biodiversity loss, antibiotic resistance, and other global challenges pose major collective action problems: A group benefits from a certain action, but no individual has sufficient incentive to act alone. Formal institutions, e.g., laws and treaties, have helped address issues like ozone depletion, lead pollution, and acid rain. However, formal institutions are not always able to enforce collectively desirable outcomes. In such cases, informal institutions, such as social norms, can be important. If conditions are right, policy can support social norm changes, helping address even global problems. To judge when this is realistic, and what role policy can play, we discuss three crucial questions: Is a tipping point likely to exist, such that vicious cycles of socially damaging behavior can potentially be turned into virtuous ones? Can policy create tipping points where none exist? Can policy push the system past the tipping point?

All life requires the capacity to recover from challenges that are as inevitable as they are unpredictable. Understanding this resilience is essential for managing the health of humans and their livestock. It has long been difficult to quantify resilience directly, forcing practitioners to rely on indirect static indicators of health. However, measurements from wearable electronics and other sources now allow us to analyze the dynamics of physiology and behavior with unsurpassed resolution. The resulting flood of data coincides with the emergence of novel analytical tools for estimating resilience from the pattern of microrecoveries observed in natural time series. Such dynamic indicators of resilience may be used to monitor the risk of systemic failure across systems ranging from organs to entire organisms. These tools invite a fundamental rethinking of our approach to the adaptive management of health and resilience.

Coral reefs support immense biodiversity and provide important ecosystem services to many millions of people. Yet reefs are degrading rapidly in response to numerous anthropogenic drivers. In the coming centuries, reefs will run the gauntlet of climate change, and rising temperatures will transform them into new configurations, unlike anything observed previously by humans. Returning reefs to past configurations is no longer an option. Instead, the global challenge is to steer reefs through the Anthropocene era in a way that maintains their biological functions. Successful navigation of this transition will require radical changes in the science, management and governance of coral reefs.

Small water systems are important hotspots of greenhouse gas (GHG) emission, but estimates are poorly constrained as data are scarce. Small ponds are often constructed in urban areas, where they receive large amounts of nutrients and therefore tend to be highly productive. Here, we investigated GHG emissions, seasonal and diel variation, and net ecosystem production (NEP) from an urban pond. In monthly 24-h field campaigns during 11 months, diffusive water–atmosphere methane (CH₄) and carbon dioxide (CO₂) fluxes and CH₄ ebullition and oxidation were quantified. With oxygen (O₂) measurements, NEP was assessed. The pond was a net GHG source the entire year, with an emission of 3.4 kg CO₂ eq m−2 yr−1. The dominant GHG emission pathway was CH₄ ebullition (bubble flux, 50%), followed by diffusive emissions of CO₂ (38%) and CH₄ (12%). Sediment CH₄ release was primarily driven by temperature and especially ebullition increased exponentially above a temperature threshold of 15°C. The pond’s atmospheric CO₂ exchange was not related to NEP or temperature but likely to a high allochthonous carbon (C) input via runoff and anaerobic mineralization of C. We expect urban ponds to show a large increase in GHG emission with increasing temperature, which should be considered carefully when constructing ponds in urban areas. Emissions may partly be counteracted by pond management focusing on a reduction of nutrient and organic matter input.

Although plastic pollution happens globally, the micro- (<5 mm) and macroplastic (5–150 mm) transfer of plastic to terrestrial species relevant to human consumption has not been examined. We provide first-time evidence for micro- and macroplastic transfer from soil to chickens in traditional Mayan home gardens in Southeast Mexico where waste mismanagement is common. We assessed micro- and macroplastic in soil, earthworm casts, chicken feces, crops and gizzards (used for human consumption). Microplastic concentrations increased from soil (0.87 ± 1.9 particles g −1 ), to earthworm casts (14.8 ± 28.8 particles g −1 ), to chicken feces (129.8 ± 82.3 particles g −1 ). Chicken gizzards contained 10.2 ± 13.8 microplastic particles, while no microplastic was found in crops. An average of 45.82 ± 42.6 macroplastic particles were found per gizzard and 11 ± 15.3 macroplastic particles per crop, with 1–10 mm particles being significantly more abundant per gizzard (31.8 ± 27.27 particles) compared to the crop (1 ± 2.2 particles). The data show that micro- and macroplastic are capable of entering terrestrial food webs.