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As scientific understanding about ecological processes has grown, the idea that ecosystem dynamics are complex, nonlinear, and often unpredictable has gained prominence. Of particular importance is the idea that rather than following an inevitable progression toward an ultimate endpoint, some ecosystems may occur in a number of states depending on past and present ecological conditions. The emerging idea of “restoration thresholds” also enables scientists to recognize when ecological systems are likely to recover on their own and when active restoration efforts are needed. Conceptual models based on alternative stable states and restoration thresholds can help inform restoration efforts. New Models for Ecosystem Dynamics and Restoration brings together leading experts from around the world to explore how conceptual models of ecosystem dynamics can be applied to the recovery of degraded systems and how recent advances in our understanding of ecosystem and landscape dynamics can be translated into conceptual and practical frameworks for restoration. In the first part of the book, background chapters present and discuss the basic concepts and models and explore the implications of new scientific research on restoration practice. The second part considers the dynamics and restoration of different ecosystems, ranging from arid lands to grasslands, woodlands, and savannahs, to forests and wetlands, to production landscapes. A summary chapter by the editors discusses the implications of theory and practice of the ideas described in preceding chapters. New Models for Ecosystem Dynamics and Restoration aims to widen the scope and increase the application of threshold models by critiquing their application in a wide range of ecosystem types. It will also help scientists and restorationists correctly diagnose ecosystem damage, identify restoration thresholds, and develop corrective methodologies that can overcome such thresholds.
The turn of the 1960s-70s, characterized by the rapid acceleration of globalization, prompted a radical transformation in the perception of urban and natural environments. The urban revolution and related prospect of the total urbanisation of the planet, in concert with rapid population growth and resource exploitation, instigated a surge in environmental awareness and activism. One implication of this moment is a growing recognition of the integration and interconnection of natural and urban entities. The present collection is an interdisciplinary inquiry into the changing modes of representation of nature in the city beginning from the turn of the 1960s/70s. Bringing together a number of different disciplinary approaches, including architectural studies and aesthetics, heritage studies and economics, environmental science and communication, the collection reflects upon the changing perception of socio-natures in the context of increasing urban expansion and global interconnectedness as they are/were manifest in specific representations. Using cases studies from around the globe, the collection offers a historical and theoretical understanding of a paradigmatic shift whose material and symbolic legacies are still accompanying us in the early 21st century.
With the continual growth of the world's urban population, biodiversity in towns and cities will play a critical role in global biodiversity. This is the first book to provide an overview of international developments in urban biodiversity and sustainable design. It brings together the views, experiences and expertise of leading scientists and designers from the industrialised and pre-industrialised countries from around the world. The contributors explore the biological, cultural and social values of urban biodiversity, including methods for assessing and evaluating urban biodiversity, social and educational issues, and practical measures for restoring and maintaining biodiversity in urban areas. Contributions come from presenters at an international scientific conference held in Erfurt, Germany 2008 during the 9th Conference of the Parties of the Convention on Biodiversity. This is also Part of our Conservation Science and Practice book series (with Zoological Society of London).