Importance of the National Petroleum Reserve–Alaska for Aquatic Birds

We used data from aerial surveys (1992–2010) of >100,000 km² and ground surveys (1998–2004) of >150 km² to estimate the density and abundance of birds on the North Slope of Alaska (U.S.A.). In the ground surveys, we used double sampling to estimate detection ratios. We used the aerial survey data to compare densities of birds and Arctic fox (Vulpes lagopus), the major nest predator of birds, on the North Slope, in Prudhoe Bay, and in nearby areas. We partitioned the Prudhoe Bay oil field into 2 × 2 km plots and determined the relation between density of aquatic birds and density of roads, buildings, and other infrastructure in these plots. Abundance and density (birds per square kilometer) of 3 groups of aquatic birds—waterfowl, loons, and grebes; shorebirds; and gulls, terns, and jaegers—were highest in the National Petroleum Reserve–Alaska (NPRA) and lowest in the Arctic National Wildlife Refuge. Six other major wetlands occur in the Arctic regions of Canada and Russia, but the largest population of aquatic birds was in the NPRA. Aquatic birds were concentrated in the northern part of the NPRA. For example, an area that covered 18% of the NPRA included 53% of its aquatic birds. The aerial surveys showed that bird density was not lower and fox density was not higher in Prudhoe Bay than in surrounding areas. Density of infrastructure did not significantly affect bird density for any group of species. Our results establish that the NPRA is one of the most important areas for aquatic birds in the Arctic. Our results and those of others also indicate that oil production, as practiced in Prudhoe Bay, does not necessarily lead to substantial declines in bird density or productivity in or near the developed areas. Prioridades para la Conservación de Aves en el Norte de Alaska     

Effect of Information Availability on Assessment and Designation of Species at Risk

Abstract: Information required to evaluate the extent to which species are at risk of extinction is usually limited and characterized as highly uncertain. In this context, we define information availability as the presence or absence of information used to determine the value of an ecological variable. We examined which of three hypothetical approaches best matched how levels of risk are assigned to species: (1) precautionary approach in which analysts designate levels of risk regardless of the amount of information available, (2) worst‐case approach in which analysts assign the maximum level of risk possible from the criteria, and (3) insurance approach in which analysts assign poorly known species to a high‐risk category when little information is available. We used the quantitative assessment criteria of the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) as a case study. We created a binary (0/1) matrix of all 2.4192 × 10⁷ logical combinations of available information for the 14 ecological variables included in the quantitative criteria. We processed each combination of information availability represented in the matrix with a computer algorithm designed to emulate COSEWIC decision‐making rules. Low information availability was associated with a relatively high frequency of not being able to assign a candidate taxon to a risk category, which does not follow the precautionary principle. Information availability and the level of risk assigned to species were directly related, which is associated with the worst‐case approach, and counter to the insurance approach. Our results suggest that information availability can have a major effect on the level of risk assigned to a species. We recommend a conscious determination of whether such effects are desired, and we recommend the development of methods to explicitly characterize and incorporate information availability and other sources of uncertainty in decision‐making processes.     

Permanent Sovereignty Over Natural Resources

In the 1960s and 1970s, the principle of permanent sovereignty over natural resources was vigorously expressed by oil-producing developing countries, through a series of measures to increase revenue from, ownership of, and effective control over the petroleum sector. Such recent significant developments as OPEC's crude oil price reduction, favorable tax treatment of transnational oil companies in the industrialized countries, the entry of the World Bank onto the international pertroleum scene and increasing competition among developing countries for scarce company exploration funds have combined to create a new, more difficult environment, in which further progress toward full sovereignty over petroleum resources will be achieved more by countries' own efforts, and less in the context of host country-oil company negotiations. Le principe de souveraineté permanente en matière de ressources naturelles a été exprimé avec vigueur par les pays producteurs de pétrole en voie de développement au cours des decenics de 1960 et 1970 par une série de mesures visant à augmenter les revenus, les droits de proprieté et le contrôle effectif afférents au secteur pétrolier. Des éléments nouveux importants, tels que la baisse des prix du brut OPEP, les structures de l'ompót qui favorissent les sociétés pétrolieres transnationales des pays industrialisés, l'entrée en scène de la Banque mondiale en ce qui concerne le pétrole sur le plan international, et la concurrence croissante des pays en voie de développement pour les rares financements d'exploration par les sociétés privécs ont contribué à la création d'un milieu nouveau et plus ardu au sein duquel un nouveau progrès vers une souveraineté totale en matière de ressources pétrolieres se fera de plus en plus par les initiatives propres des pays et de moins en moins dans le contexte de négociacions entre les pays et les sociétés pétrolieres. En las décadas del 60 y 70, el principio de soberanía permanente sobre recursos naturales fue expresado vigorosamente por los países en desarrollo productores de petróleo, a través de diversas medidas con el objeto de aumentos el ingreso del sector petrolero y reafirmar el control y propriedad sobre éste. Nuevos hechos tales como la reducción del prccios acordados por la OPEP, impuestos favorables para las compañías transnacionales, la participatión del Banco Mundial en el sector del petróleo y la creciente competencia entre países en desarrollo por escasos fondos para exploración petrolera han creado un ambiente diffícil en el que la total soberanía sobre los recursos petroleros se obtendrán más por esfuerzo propio de los países y menos dentro del contexto de negociaciones entre país y las compañías de petróleo.     

Food Security Reserve Policy in Ethiopia: A Case Study of Experience and Implications

Food security reserve policy in Ethiopia since 1982 is reviewed in the light of the limited progress made elsewhere in Africa in establishing and maintaining such reserves. While the reserve played some role in dealing with the crisis of 1987/8, donor confidence was eroded by unauthorised drawings from the reserve and other factors. In 1992, the Ethiopian Food Security Reserve Authority was established to provide a system of management more acceptable to donors. This had led to donor pledges to replenish the reserve, though it remains well below the target level. Despite increased government commitment of funds, donor confidence remains fragile and the reserve remains dependent on donor support. The place of the reserve in national food security policy is not yet fully defined. Conclusions are drawn for food security reserve policy in Ethiopia and elsewhere in Africa.     

Scale Dependency of Rarity, Extinction Risk, and Conservation Priority

Abstract:   In developing red data books of threatened species, the World Conservation Union uses measures of rarity, rates of decline, and population fragmentation to categorize species according to their risk of extinction. However, most quantitative measures of these three concepts are sensitive to the scale at which they are made. In particular, definitions of rarity based on an area-of-occupancy threshold can nearly always be met if area of occupancy is calculated from a sufficiently fine-scale (high-resolution) grid. Recommendations for dealing with scale dependency include (1) choosing a standard scale of measurement, (2) using multiple scales of measurement, and (3) developing indices that combine information from multiple scales. As an example of the second and third approach, the construction of a species' scale-area curve represents a unifying method for quantifying all three indicators of extinction risk—rarity, rate of decline, and population fragmentation—as functions of area of occupancy and measurement scale. A multiscale analysis is also of practical importance because measurements made at different scales are relevant to different extinction processes. Coarse-scale measures of rarity are most appropriate when threat is assessed on the basis of spatially autocorrelated events of a large extent, such as global climate change, whereas fine-scale measures may best predict extinction risk due to local processes such as demographic stochasticity. We illustrate our arguments with a case study of the British distributions of two related plant species that show a 200-fold reversal in their relative rarity when measured at different scales.     

Use of Multispecies Occupancy Models to Evaluate the Response of Bird Communities to Forest Degradation Associated with Logging

Forest degradation is arguably the greatest threat to biodiversity, ecosystem services, and rural livelihoods. Therefore, increasing understanding of how organisms respond to degradation is essential for management and conservation planning. We were motivated by the need for rapid and practical analytical tools to assess the influence of management and degradation on biodiversity and system state in areas subject to rapid environmental change. We compared bird community composition and size in managed (ejido, i.e., communally owned lands) and unmanaged (national park) forests in the Sierra Tarahumara region, Mexico, using multispecies occupancy models and data from a 2‐year breeding bird survey. Unmanaged sites had on average higher species occupancy and richness than managed sites. Most species were present in low numbers as indicated by lower values of detection and occupancy associated with logging‐induced degradation. Less than 10% of species had occupancy probabilities >0.5, and degradation had no positive effects on occupancy. The estimated metacommunity size of 125 exceeded previous estimates for the region, and sites with mature trees and uneven‐aged forest stand characteristics contained the highest species richness. Higher estimation uncertainty and decreases in richness and occupancy for all species, including habitat generalists, were associated with degraded young, even‐aged stands. Our findings show that multispecies occupancy methods provide tractable measures of biodiversity and system state and valuable decision support for landholders and managers. These techniques can be used to rapidly address gaps in biodiversity information, threats to biodiversity, and vulnerabilities of species of interest on a landscape level, even in degraded or fast‐changing environments. Moreover, such tools may be particularly relevant in the assessment of species richness and distribution in a wide array of habitats. Uso de Modelos de Ocupación para Múltiples Especies para Evaluar la Respuesta de las Comunidades de Aves a la Degradación de Bosques Asociada con la Tala     

Using Strategic Foresight to Assess Conservation Opportunity

The nature of conservation challenges can foster a reactive, rather than proactive approach to decision making. Failure to anticipate problems before they escalate results in the need for more costly and time‐consuming solutions. Proactive conservation requires forward‐looking approaches to decision making that consider possible futures without being overly constrained by the past. Strategic foresight provides a structured process for considering the most desirable future and for mapping the most efficient and effective approaches to promoting that future with tools that facilitate creative thinking. The process involves 6 steps: setting the scope, collecting inputs, analyzing signals, interpreting the information, determining how to act, and implementing the outcomes. Strategic foresight is ideal for seeking, recognizing, and realizing conservation opportunities because it explicitly encourages a broad‐minded, forward‐looking perspective on an issue. Despite its potential value, the foresight process is rarely used to address conservation issues, and previous attempts have generally failed to influence policy. We present the strategic foresight process as it can be used for proactive conservation planning, describing some of the key tools in the foresight tool kit and how they can be used to identify and exploit different types of conservation opportunities. Scanning is an important tool for collecting and organizing diverse streams of information and can be used to recognize new opportunities and those that could be created. Scenario planning explores how current trends, drivers of change, and key uncertainties might influence the future and can be used to identify barriers to opportunities. Backcasting is used to map out a path to a goal and can determine how to remove barriers to opportunities. We highlight how the foresight process was used to identify conservation opportunities during the development of a strategic plan to address climate change in New York State. The plan identified solutions that should be effective across a range of possible futures. Illustrating the application of strategic foresight to identify conservation opportunities should provide the impetus for decision makers to explore strategic foresight as a way to support more proactive conservation policy, planning, and management.