This book offers a comprehensive overview of the intellectual developments in urban conservation. The authors offer unique insights from UNESCO's World Heritage Centre and the book is richly ...illustrated with colour photographs. Examples are drawn from urban heritage sites worldwide from Timbuktu to Liverpool to demonstrate key issues and best practice in urban conservation today. The book offers an invaluable resource for architects, planners, surveyors and engineers worldwide working in heritage conservation, as well as for local authority conservation officers and managers of heritage sites.
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Limited funding is a major barrier to implementing ambitious global restoration commitments, so reducing restoration costs is essential to upscale restoration. The lack of rigorous ...analyses about the major components and drivers of restoration costs limit the development of alternatives to reduce costs and the selection of the most cost-effective methods to achieve restoration goals. We conducted detailed restoration cost assessments for the three most widespread biomes in Brazil (Amazon, Cerrado, and Atlantic Forest) and estimated the restoration costs associated with implementing Brazil’s National Plan for Native Vegetation Recovery (12M hectares). Most surveys (60–90%) reported using the costly methods of planting seedlings or sowing seeds throughout the site, regardless of the biome. Natural regeneration and assisted regeneration approaches were an order of magnitude cheaper but were reported in <15% of projects. The vast majority of tree planting and direct seeding costs were incurred during the implementation phase, and nearly 80% of projects ended maintenance within 30 months. We estimated a price tag of US$0.7-1.2 billion per year until 2030 to implement Brazil’s restoration plan depending on the area that recovers through natural regeneration. Our results offer valuable insights for developing strategies to make restoration cheaper and to increase its cost-effectiveness for achieving diverse benefits in Brazilian ecosystems. Our survey also provides a starting point for sound assessments of restoration costs and their drivers in other biomes, which are needed to reduce the financial barriers to scaling up restoration at a global scale.
Examining the science of stream restoration, Rebecca Lave argues that the neoliberal emphasis on the privatization and commercialization of knowledge has fundamentally changed the way that science is ...funded, organized, and viewed in the United States.Stream restoration science and practice is in a startling state. The most widely respected expert in the field, Dave Rosgen, is a private consultant with relatively little formal scientific training. Since the mid-1990s, many academic and federal agency-based scientists have denounced Rosgen as a charlatan and a hack. Despite this, Rosgen's Natural Channel Design approach, classification system, and short-course series are not only accepted but are viewed as more legitimate than academically produced knowledge and training. Rosgen's methods are now promoted by federal agencies including the Environmental Protection Agency, the U.S. Forest Service, the U.S. Fish and Wildlife Service, and the Natural Resources Conservation Service, as well as by resource agencies in dozens of states.Drawing on the work of Pierre Bourdieu, Lave demonstrates that the primary cause of Rosgen's success is neither the method nor the man but is instead the assignment of a new legitimacy to scientific claims developed outside the academy, concurrent with academic scientists' decreasing ability to defend their turf. What is at stake in the Rosgen wars, argues Lave, is not just the ecological health of our rivers and streams but the very future of environmental science.
International forest landscape restoration commitments have promoted the restoration of millions of hectares of degraded and deforested lands globally, but few forest restoration approaches provide ...both ecologically‐sound and financially‐viable solutions for achieving the spatial scale proposed. One potential revenue source for restoration is selective harvesting of timber, a product for which there is a clear global market and increasing demand. The use of commercially valuable exotic trees may attract farmers to restoration, but can be a major concern for ecologists.
Here, we present results collected over 7 years from experimental studies at three sites across the Brazilian Atlantic Forest to assess the impacts of incorporating exotic eucalypts as a transitional stage in tropical forest restoration on above‐ground biomass accumulation, native woody species regeneration and financial viability.
Biomass accumulation was nine times greater in mixed eucalypt‐native species plantations than native only plantings due to fast eucalypt growth. Nonetheless, the growth of native non‐pioneer trees was not affected or only slightly reduced by eucalypts prior to logging.
Eucalypts did not negatively affect the natural regeneration of native woody species before or after eucalypt logging. Canopy cover regrew quickly but was slightly lower a year following logging in mixed eucalypt‐native species plantations. Natural regeneration richness and planted non‐pioneer growth were similar across treatments in the post‐logging period. We found higher variation of biomass accumulation and native species regeneration among sites than between plantation types within sites.
The income from eucalypt wood production offset 44%–75% of restoration implementation costs.
Synthesis and applications. Many of the negative effects attributed to eucalypts on the growth and natural regeneration of native trees depend on features of the production system, landscape structure, soil, and climate in which they are grown, rather than the effects of eucalypts per se. In Brazil's Atlantic Forest region, exotic eucalypts can become important allies of tropical forest restoration, and their use and investment opportunities should be considered within the portfolio of options supported by public and private funding and policies.
Many of the negative effects attributed to eucalypts on the growth and natural regeneration of native trees depend on features of the production system, landscape structure, soil, and climate in which they are grown, rather than the effects of eucalypts per se. In Brazil's Atlantic Forest region, exotic eucalypts can become important allies of tropical forest restoration, and their use and investment opportunities should be considered within the portfolio of options supported by public and private funding and policies.
Forest restoration is a promising solution to counteract climate change, biodiversity loss, and meet a host of socioeconomic objectives. While international initiatives highlight potential ...contributions of forest restoration as a win-win for people and nature, we lack detailed information on how frontline restoration practitioners are addressing this challenge on the ground. Here, we present a systematic assessment of motivations, scale, and costs of forest restoration implemented by 166 practitioners across 14 countries in Latin America. We found that forest restoration is motivated by interlinked objectives and accordingly, most restoration practitioners concurrently used multiple interventions spanning a range of intensity of inputs matched to the scale of individual projects. Project scale influenced strategy, with low-intensity interventions like natural regeneration implemented when operating at larger scales (≥500 ha). However, active tree planting remains the most frequently used intervention (included in >92 % of programs). Costs of establishing planted areas vary most broadly at the project level ($4445/ha ± 4841 over first 3 years) with little evidence of efficiencies of scale and with additional financial support ($964/ha/yr) required ~10 years past establishment. Moreover, monitoring added substantial additional costs, and we identified widespread misalignment between indicators measured and the most frequently expressed objective of restoring biodiversity. Our results emphasize that, while a promising range of new forest restoration interventions are being implemented across Latin America, lower-cost interventions, accessible and practical monitoring strategies, and better alignment between funding cycles and actual time frames required to achieve restoration objectives are urgently needed to support successful outcomes.
•Practitioners concurrently use diverse restoration approaches tailored to conditions.•Lower-cost strategies are implemented most often when operating at larger scales.•Active tree planting and growing is the most widely used forest restoration approach.•Longer-term funding would improve success of broadly used restoration approaches.•Monitoring efforts infrequently align with objectives of conserving biodiversity.
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