Author
Benjamin Timothy Phalan
Other affiliations: Oregon State University, International Institute of Minnesota, University of Cambridge
Bio: Benjamin Timothy Phalan is an academic researcher from Federal University of Bahia. The author has contributed to research in topics: Disturbance (ecology) & Forest management. The author has an hindex of 8, co-authored 13 publications receiving 473 citations. Previous affiliations of Benjamin Timothy Phalan include Oregon State University & International Institute of Minnesota.
Papers
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University of Cambridge1, Rothamsted Research2, University of Sheffield3, Royal Society for the Protection of Birds4, University of Nottingham5, University of Aberdeen6, University of Edinburgh7, University of Oxford8, National Autonomous University of Mexico9, Commonwealth Scientific and Industrial Research Organisation10, Pontifical Catholic University of Rio de Janeiro11, University of Agriculture, Faisalabad12, Federal University of Bahia13, University of Bristol14, World Conservation Monitoring Centre15
TL;DR: This study argues that high-yield farming impacts should be measured per unit of production and shows that viewed this way, some land-efficient systems have less impact than lower-yielding alternatives, and suggests that trade-offs among key cost metrics are not as ubiquitous as sometimes perceived.
Abstract: How we manage farming and food systems to meet rising demand is pivotal to the future of biodiversity Extensive field data suggest that impacts on wild populations would be greatly reduced through boosting yields on existing farmland so as to spare remaining natural habitats High-yield farming raises other concerns because expressed per unit area it can generate high levels of externalities such as greenhouse gas emissions and nutrient losses However, such metrics underestimate the overall impacts of lower-yield systems Here we develop a framework that instead compares externality and land costs per unit production We apply this framework to diverse data sets that describe the externalities of four major farm sectors and reveal that, rather than involving trade-offs, the externality and land costs of alternative production systems can covary positively: per unit production, land-efficient systems often produce lower externalities For greenhouse gas emissions, these associations become more strongly positive once forgone sequestration is included Our conclusions are limited: remarkably few studies report externalities alongside yields; many important externalities and farming systems are inadequately measured; and realizing the environmental benefits of high-yield systems typically requires additional measures to limit farmland expansion Nevertheless, our results suggest that trade-offs among key cost metrics are not as ubiquitous as sometimes perceived
168 citations
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Oregon State University1, Newcastle University2, Imperial College London3, National Autonomous University of Mexico4, Federal University of Mato Grosso do Sul5, Universidade Federal de Lavras6, Lancaster University7, University of Southampton8, State University of Santa Cruz9, University of Florida10, Anglia Ruskin University11, Auburn University12, Swiss Ornithological Institute13, Bern University of Applied Sciences14, Ghent University15, National University of Colombia16, Ryerson University17, Field Museum of Natural History18, State University of Feira de Santana19, University of East Anglia20, Federal University of Bahia21, University of Wisconsin-Madison22, The Nature Conservancy23, University of Queensland24, Nanyang Technological University25, Centro Agronómico Tropical de Investigación y Enseñanza26, University of Canterbury27, Pontifical Xavierian University28, Smithsonian Conservation Biology Institute29, John Carroll University30, Swansea University31, Zoological Society of London32, California State University, Los Angeles33, Durrell Wildlife Conservation Trust34
TL;DR: It is concluded that conservation efforts to limit edges created by fragmentation will be most important in the world’s tropical forests because species that have evolved in, and survived in, high-disturbance environments are less sensitive to forest fragmentation.
Abstract: Habitat loss is the primary driver of biodiversity decline worldwide, but the effects of fragmentation (the spatial arrangement of remaining habitat) are debated. We tested the hypothesis that forest fragmentation sensitivity-affected by avoidance of habitat edges-should be driven by historical exposure to, and therefore species' evolutionary responses to disturbance. Using a database containing 73 datasets collected worldwide (encompassing 4489 animal species), we found that the proportion of fragmentation-sensitive species was nearly three times as high in regions with low rates of historical disturbance compared with regions with high rates of disturbance (i.e., fires, glaciation, hurricanes, and deforestation). These disturbances coincide with a latitudinal gradient in which sensitivity increases sixfold at low versus high latitudes. We conclude that conservation efforts to limit edges created by fragmentation will be most important in the world's tropical forests.
131 citations
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TL;DR: This work combines global data on yield gaps, projected future production of maize, rice and wheat, the distributions of birds and their estimated sensitivity to changes in crop yields to map where it might be most beneficial for bird conservation to close yield gaps as part of a land-sparing strategy, and where doing so may be most damaging.
Abstract: Increasing agricultural productivity to ‘close yield gaps’ creates both perils and possibilities for biodiversity conservation. Yield increases often have negative impacts on species within farmland, but at the same time could potentially make it more feasible to minimize further cropland expansion into natural habitats. We combine global data on yield gaps, projected future production of maize, rice and wheat, the distributions of birds and their estimated sensitivity to changes in crop yields to map where it might be most beneficial for bird conservation to close yield gaps as part of a land-sparing strategy, and where doing so might be most damaging. Closing yield gaps to attainable levels to meet projected demand in 2050 could potentially help spare an area equivalent to that of the Indian subcontinent. Increasing yields this much on existing farmland would inevitably reduce its biodiversity, and therefore we advocate efforts both to constrain further increases in global food demand, and to identify the least harmful ways of increasing yields. The land-sparing potential of closing yield gaps will not be realized without specific mechanisms to link yield increases to habitat protection (and restoration), and therefore we suggest that conservationists, farmers, crop scientists and policy-makers collaborate to explore promising mechanisms.
110 citations
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TL;DR: A novel guide for applying cognition to diverse conservation issues is created and it is shown that using cognitive principles can modify behaviour across taxonomic groups.
Abstract: Every animal occupies a unique cognitive world based on its sensory capacities, and attentional and learning biases. Behaviour results from the interaction of this cognitive world with the environment. As humans alter environments, cognitive processes ranging from perceptual processes to learned behaviour govern animals’ reactions. By harnessing animals’ perceptual biases and applying insights from cognitive theory, we can purposefully alter cues to reduce maladaptive responses and shape behaviour. Despite the fundamental connection between cognition and behaviour, the breadth of cognitive theory is underutilised in conservation practice. Bridging these disciplines could augment existing conservation efforts targeting animal behaviour. We outline relevant principles of perception and learning, and develop a step-by-step process for applying aspects of cognition towards specific conservation issues.
105 citations
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TL;DR: It is found that land sparing would allow larger estimated populations of most species and larger carbon stocks to persist than would land sharing or any intermediate strategy, and highlights the importance, in evaluating the biodiversity impacts of land use, of measuring population densities of individual species, rather than simple species richness.
Abstract: Williams was supported by Natural Environment Research Council Grant 1122875; F. Alvarado was supported by scholarship from CONACyT (No 234341) and Rufford Small Grants Foundation (RSGF No 14030-1)
48 citations
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TL;DR: A forum to review, analyze and stimulate the development, testing and implementation of mitigation and adaptation strategies at regional, national and global scales as mentioned in this paper, which contributes to real-time policy analysis and development as national and international policies and agreements are discussed.
Abstract: ▶ Addresses a wide range of timely environment, economic and energy topics ▶ A forum to review, analyze and stimulate the development, testing and implementation of mitigation and adaptation strategies at regional, national and global scales ▶ Contributes to real-time policy analysis and development as national and international policies and agreements are discussed and promulgated ▶ 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again
2,587 citations
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TL;DR: In this paper, a framework has been proposed that distinguishes between the integration (land sharing) and separation (land sparing) of conservation and production to address the challenges of biodiversity conservation and commodity production.
Abstract: To address the challenges of biodiversity conservation and commodity production, a framework has been proposed that distinguishes between the integration (land sharing) and separation (land sparing) of conservation and production. Controversy has arisen around this framework partly because many scholars have focused specifically on food production rather than more encompassing notions such as land scarcity or food security. Controversy further surrounds the practical value of partial trade-off analyses, the ways in which biodiversity should be quantified, and a series of scale effects that are not readily accounted for. We see key priorities for the future in (1) addressing these issues when using the existing framework, and (2) developing alternative, holistic ways to conceptualise challenges related to food, biodiversity, and land scarcity. (Less)
372 citations
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The Catholic University of America1, International Institute of Minnesota2, University of Queensland3, Federal University of Rio de Janeiro4, Wageningen University and Research Centre5, Autonomous University of Barcelona6, Federal Fluminense University7, University of Cambridge8, University of Tasmania9, University of the Philippines Los Baños10, International Union for Conservation of Nature and Natural Resources11, BirdLife International12, University of Natural Resources and Life Sciences, Vienna13, University of São Paulo14, Royal Society for the Protection of Birds15, National University of Cordoba16, World Conservation Monitoring Centre17, International Institute for Applied Systems Analysis18, Environmental Change Institute19, University of Vienna20
TL;DR: It is found that restoring 15% of converted lands in priority areas could avoid 60% of expected extinctions while sequestering 299 gigatonnes of CO 2 —30% of the total CO 2 increase in the atmosphere since the Industrial Revolution.
Abstract: Extensive ecosystem restoration is increasingly seen as being central to conserving biodiversity and stabilizing the climate of the Earth. Although ambitious national and global targets have been set, global priority areas that account for spatial variation in benefits and costs have yet to be identified. Here we develop and apply a multicriteria optimization approach that identifies priority areas for restoration across all terrestrial biomes, and estimates their benefits and costs. We find that restoring 15% of converted lands in priority areas could avoid 60% of expected extinctions while sequestering 299 gigatonnes of CO2—30% of the total CO2 increase in the atmosphere since the Industrial Revolution. The inclusion of several biomes is key to achieving multiple benefits. Cost effectiveness can increase up to 13-fold when spatial allocation is optimized using our multicriteria approach, which highlights the importance of spatial planning. Our results confirm the vast potential contributions of restoration to addressing global challenges, while underscoring the necessity of pursuing these goals synergistically.
348 citations
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01 Jan 2014
TL;DR: In this paper, a framework has been proposed that distinguishes between the integration (land sharing) and separation (land sparing) of conservation and production of commodity production to address the challenges of biodiversity conservation and commodity production.
Abstract: To address the challenges of biodiversity conservation and commodity production, a framework has been proposed that distinguishes between the integration (“land sharing”) and separation (“land sparing”) of conservation and production. Controversy has arisen around this framework partly because many scholars have focused specifically on food production rather than more encompassing notions such as land scarcity or food security. Controversy further surrounds the practical value of partial trade‐off analyses, the ways in which biodiversity should be quantified, and a series of scale effects that are not readily accounted for. We see key priorities for the future in (1) addressing these issues when using the existing framework, and (2) developing alternative, holistic ways to conceptualise challenges related to food, biodiversity, and land scarcity.
347 citations
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TL;DR: This review reviews the ecological evidence in favor of sparing versus sharing, and suggests that the dichotomy of the land‐sparing/land‐sharing framework limits the realm of future possibilities to two, largely undesirable, options for conservation.
Abstract: Conservation biologists are devoting an increasing amount of energy to debating whether land sparing (high-yielding agriculture on a small land footprint) or land sharing (low-yielding, wildlife-friendly agriculture on a larger land footprint) will promote better outcomes for local and global biodiversity. In turn, concerns are mounting about how to feed the world, given increasing demands for food. In this review, I evaluate the land-sparing/land-sharing framework--does the framework stimulate research and policy that can reconcile agricultural land use with biodiversity conservation, or is a revised framing needed? I review (1) the ecological evidence in favor of sparing versus sharing; (2) the evidence from land-use change studies that assesses whether a relationship exists between agricultural intensification and land sparing; and (3) how that relationship may be affected by socioeconomic and political factors. To address the trade-off between biodiversity conservation and food production, I then ask which forms of agricultural intensification can best feed the world now and in the future. On the basis of my review, I suggest that the dichotomy of the land-sparing/land-sharing framework limits the realm of future possibilities to two, largely undesirable, options for conservation. Both large, protected regions and favorable surrounding matrices are needed to promote biodiversity conservation; they work synergistically and are not mutually exclusive. A "both-and" framing of large protected areas surrounded by a wildlife-friendly matrix suggests different research priorities from the "either-or" framing of sparing versus sharing. Furthermore, wildlife-friendly farming methods such as agroecology may be best adapted to provide food for the world's hungry people.
319 citations