There is a great deal of discussion in conservation about the possibility of quantifying and paying for the services to societies that nature performs. Functions such as carbon sequestration and water provision can be valued and payments made for them. Advocates argue that payments for ecological/environmental services (PES) will generate substantial sums, render environmental values legible to politicians and make protecting nature common sense to rational people.

Scientific evidence will be better incorporated into conservation action and environmental policy if it is deemed credible by decision-makers. However, huge uncertainties are inherent in large-scale ecosystem statistics. Two wetland case studies relating to mangrove areal extent in Peninsular Malaysia and saltmarsh loss in the UK indicate the major causes of information uncertainty, relating to poor methodological description, traceability and assumptions associated with the use of grey literature. Furthermore, potentially inaccurate information can be propagated throughout the research community and gain ‘proof by assertion’, especially if the information originates from an authoritative source. Researchers must better consider implicit and explicit uncertainty and be critical of secondary information. Future information production requires the use of rigorous peer-reviewed methodologies in order to decrease and quantify error. Such steps will increase the credibility of scientific evidence, so researchers can better contribute to a two-way science and policy deliberation approach.

The concepts of biodiversity and ecosystem services have become widely established and adopted within and beyond nature conservation circles. But biotic nature is only part of nature. The existence and importance of abiotic nature often goes unrecognized and is certainly undervalued. This Comment tries to redress the balance by outlining some recent developments in valuing and conserving abiotic nature, particularly the important concepts of geodiversity and geosystem services.

For the past 125 years the university has been the home of knowledge production. The 20th century research university combined a Kantian belief in disciplinarity, a Humboldtian commitment to linking research and education and upholding academic autonomy, and a Cartesian allegiance to infinite knowledge production. This approach to knowledge creation was seen as sufficient, for knowledge products themselves were understood as automatically relevant to society, and no one imagined a problem with endless knowledge production. The 20th century model of knowledge production is now under pressure from a number of sources: information technologies, neoliberal assumptions and demands for greater accountability. ‘Interdisciplinarity’ has become the term of art for addressing this crisis. But interdisciplinarity is no panacea to the challenges facing knowledge production today. In addition to knowledge on sustainability, knowledge production itself must now be made sustainable. This requires clearly connecting knowledge production and use, and ending the bad infinity of knowledge production.

Burgeoning acquisition of information about the workings, scope and diversities of the cosmos put serious pressure on 19th-century European intellectuals to classify branches of human knowledge. A challenge presented itself not only to order different subject-areas and disciplines intelligently, or assess them according to apparent degrees of certitude, but also to discover some synthesizing principle by which all the distinctive methods of approaching the world might be viewed in interrelationship. This review shows that such endeavours to classify and unify were traditional procedures, with deep roots going back to antiquity, and they brought coherence to academic programmes through the centuries. As a mark of European modernity, there was a tendency to establish more rational, scientific and secular principles of order, and the consequent tensions between positivistic and holistic styles of approach to science have continued since. Since the beginning of the twentieth century, it is also recognized, the constant subdividing of academic agendas has made the work of classification much less manageable and attractive. If traditional principles to express the unity of knowledge were philosophical, or, in the case of the medieval universities, evoked the oneness of the divine Creation, it is intriguing how planetary survivalism in the present time has pushed environmental science centre-stage as a pivotal point of activity encouraging interdisciplinary collaboration. If varying consideration has been granted to practical subjects (for example agriculture) in the history of knowledge classification, their importance has been clarified by current biospheric predicaments.

The concept of ecosystem services (ES), the benefits humans derive from ecosystems, is increasingly applied to environmental conservation, human well-being and poverty alleviation, and to inform the development of interventions. Payments for ecosystem services (PES) implicitly recognize the unequal distribution of the costs and benefits of maintaining ES, through monetary compensation from ‘winners’ to ‘losers’. Some research into PES has examined how such schemes affect poverty, while other literature addresses trade-offs between different ES. However, much evolving ES literature adopts an aggregated perspective of humans and their well-being, which can disregard critical issues for poverty alleviation. This paper identifies four issues with examples from coastal ES in developing countries. First, different groups derive well-being benefits from different ES, creating winners and losers as ES, change. Second, dynamic mechanisms of access determine who can benefit. Third, individuals' contexts and needs determine how ES contribute to well-being. Fourth, aggregated analyses may neglect crucial poverty alleviation mechanisms such as cash-based livelihoods. To inform the development of ES interventions that contribute to poverty alleviation, disaggregated analysis is needed that focuses on who derives which benefits from ecosystems, and how such benefits contribute to the well-being of the poor. These issues present challenges in data availability and selection of how and at which scales to disaggregate. Disaggregation can be applied spatially, but should also include social groupings, such as gender, age and ethnicity, and is most important where inequality is greatest. Existing tools, such as stakeholder analysis and equity weights, can improve the relevance of ES research to poverty alleviation.

Sustainability science has developed from a new research field into a vibrant discipline in its own right, with scientific conferences, journals and scientific societies dedicated to its pursuit. Characterized more by its research purpose than by a common set of methods or objects, sustainability science can be subdivided into the more traditional disciplinary-based science for sustainability and the transdisciplinary science of sustainability. Whereas the former consists of more descriptive, analytical and basic science, the latter is characterized by reflexivity and applicability; on a meta level, the emergence of the latter can be understood as a new step in the evolution of science. This review provides an overview of the state of sustainability science, identifying action orientation, integrated assessments and interdisciplinarity as overall characteristics. The review also focuses on methodological issues, highlighting differences in project organization and management, and the ways in which stakeholder participation can be organized in interdisciplinary and transdisciplinary research projects. Sustainability science is recognized as essential for progress towards sustainability, and as an opportunity to bring science closer to the people, requiring significant changes in the way science is organized and conducted.

Annual revenue flow to developing countries for ecotourism could be as large as US$ 29 billion, providing an enormous financial incentive against habitat loss and exploitation. However, surprisingly little quantitative evidence exists on the profitability of the rainforest ecotourism sector, which determines the incentive and capacity of the sector to engage in conservation. A Peruvian rainforest ecotourism cluster generated US$ 11.6 million in 2005. The after-tax profit margin was at least 14% and has increased with tourist volume. High profitability, coupled with new legislation, has allowed operators to put 54 358 ha of rainforest near the new Interoceánica Sur highway under private management and to engage in conservation actions. A previously published microeconomic contract model of protected-areas management identifies two key features of rainforest tourism that link ecotourism to conservation: (1) tourists demand an immersive experience, which incentivizes the acquisition of large amounts of forest cover, and (2) institutional reforms have increased the expected effectiveness of conservation actions. In Peru, these conditions appear to be met, so that profits from ecotourism can combine with new land tenure rights to create a governance structure within which the industry can act as an independently financed partner to the conservation community.

Understanding the resource needs of animals is critical to their management and conservation. Resource utilization functions (RUFs) provide a framework to investigate animal-resource relationships by characterizing variation in the amount of resource use. In this context a ‘resource’ is any aspect of a species' fundamental niche that can be mapped throughout the area of investigation (such as study area or home range). Extensive global positioning system (GPS) data from 17 cougars (Puma concolor) demonstrate the utility and potential challenges of estimating RUFs within the home range for far-ranging species. Ninety-nine per cent utilization distributions (UDs) estimated using bivariate plug in, univariate least-squares cross-validation and reference bandwidth selection methods were compared. Distance to water, per cent clear-cut and regenerating forest, and slope were used to estimate cougar RUFs. UDs derived from GPS data were more refined, and plug-in UDs were least similar to UDs derived from other bandwidths. RUFs were resilient to variation in the smoothing parameter, with all methods yielding coefficients that largely reflected observations of foraging ecology and behaviour. Cougars were individualistic, but use was generally positively associated with the presence of regenerating forest and inversely associated with steep slopes. Advances in technology allow for greater accuracy and resolution of the UD, but software improvements and spatially explicit information on animal behaviour are needed to better understand resource use.

The emergent human cultures have shaped, and in turn been shaped by, local ecosystems. Yet humanity's intense modification of the environment has resulted in dramatic worldwide declines in natural and cultural capital. Social-ecological systems are becoming more vulnerable through the disruption of livelihoods, governance, institutions, resources and cultural traditions. This paper reviews the environmental sub-disciplines that have emerged to seek solutions for conservation and maintenance of the resilience of social-ecological systems. It shows that a central component is engagement with the knowledges of people within their contexts. Local knowledges of nature (traditional, indigenous, local ecological knowledge and ecoliteracy) are used by place-based cultures to guide actions towards nature. The importance of new engagements between different knowledges is now becoming more widely recognized by scientific institutions. Yet there still exist many false dualisms (for example local knowledge versus science) which tend to emphasize a superiority of one over the other. Ecocultures retain or strive to regain their connections with the environment, and thus improve their own resilience. Revitalization projects offer ways to connect knowledge with action to produce optimal outcomes for both nature and culture, suggesting that systems can be redesigned by emphasis on incorporation of local and traditional knowledge systems.

This article identifies ways to overcome impediments to restoring natural features on developed shores where human-use functions are the dominant driving forces. Suggestions are made for (1) incorporating natural features and natural dynamism into beach nourishment projects; (2) addressing constraints in size and space; (3) reducing the impact of human actions and elements in the landscape; (4) integrating endangered species programmes; (5) overcoming impediments to implementing restoration projects; (6) conducting post-construction evaluations and actions; (7) obtaining public support; and (8) addressing regulatory issues. Beach nourishment projects can better mimic natural landforms, while protecting infrastructure and habitat, creating space for dunes, and providing sediment for dune building. Dunes can have more value as habitat if sub-environments representative of natural gradients are accommodated. Greater human effort will be required to maintain both dynamic and stable zones for habitat, and these zones may be restricted to smaller scales. Controls can be placed on human actions, such as raking the beach, driving on the beach, walking through the dune, emplacing more structures than necessary and introducing exotic vegetation for landscaping. Regulatory restrictions that now prevent environmentally friendly actions can be eased, and adaptive management and education programmes can be implemented.

Payments for ecosystem services (PES) are a relatively new economic policy instrument, and the factors that drive and explain their environmental performance are poorly understood. Here a meta-analysis of causal relationships between the institutional design and environmental performance of 47 payments for watershed services (PWS) schemes worldwide showed a significant effect on environmental achievement of the terms and conditions of scheme participation, including the selection of service providers, community participation, the existence and monitoring of quantifiable objectives, and the number of intermediaries between service providers and buyers. Direct payments by downstream hydropower companies to upstream land owners for reduced sediment loads were identified as a successful PWS example. No other significant explanatory factors, such as specific type of watershed service, age or scale of implementation of the PWS scheme were detected. The results are highly dependent on the reliability of the input variables, in particular the measurement of the environmental performance variable. Despite efforts to find quantitative information on the environmental performance of existing PWS schemes, such empirical evidence is lacking in many of the schemes studied. International monitoring guidelines are needed to facilitate comparisons, identify success factors and support the future design of cost-effective PWS schemes.

Because protected areas are a major means of conservation, the extent to which ecosystems are represented under different protection regimes needs to be ascertained. A gap analysis approach was used to assess the representativeness of Chile's terrestrial ecosystems in differing kinds of protected areas. Terrestrial ecosystems were described in terms of potential vegetation, employing three protection scenarios. Scenario 1 was based exclusively on the Chilean National System of Protected Wild Areas (SNASPE). Scenario 2 included all types of public protected areas, namely SNASPE, nature sanctuaries and Ministry of National Heritage lands. Scenario 3 included all items in Scenario 2, but also included private protected areas and biodiversity priority sites. There is insufficient protection of terrestrial ecosystems under the Scenario 2. In addition to the low level of ecosystem protection provided by state protected areas (only 42 of the 127 terrestrial ecosystems had >10% of their area protected), 23 terrestrial ecosystems were identified as having no protection at the national level. Gaps in protection were concentrated in the North (both coastal and inland desertic scrub), Central (thorny scrub, thorny forests, sclerophyllous forests and deciduous coastal forests) and Austral (steppe ecosystems) regions of Chile. These gaps include ecosystems that are of global conservation importance.

This paper reviews developments in both environmental economics and ecological economics with respect to their progress towards environmental interdisciplinarity and towards providing solutions to environmental problems. The concepts, methods, theories and assumptions of each field of knowledge are reviewed and the extent to which they depart from the dominant neoclassical paradigm of economics is assessed. The contribution that interdisciplinarity has made to the success of each field is analysed in terms of understanding, influence and effectiveness and the constraints that it has imposed upon that success. Environmental economics has adopted the dominant economic neoclassical paradigm, including the power of the market to allocate environmental resources efficiently and in a socially optimal way. The solution to environmental problems is thus seen as a matter of ensuring that the environment is properly priced to reflect the relative scarcity of natural resources and assets and to ensure that environmental values are incorporated into the market. This specialized view of environmental problems is now reflected in government policy around the world including the use of extended cost benefit analyses, contingent valuations, environmental charges and emissions trading. Nevertheless, environmental problems continue to grow in severity and the solutions provided by environmental economists have proven ineffective. Thus lack of interdisciplinarity does not prevent a field of knowledge from gaining influence and dominance, however its effectiveness in terms of understanding environmental problems and solving them is impeded. Ecological economics seeks to incorporate the research of economists, ecologists, philosophers and social scientists, however its influence seems to be have been limited to areas in which it retains the standard economics framework, and this limits its effectiveness in terms of environmental solutions. Thus interdisciplinarity may increase understanding of the real world but it cannot overcome political and social barriers to translating that understanding into the widespread implementation of effective environmental measures.

Ecosystem services programmes have been advocated for their potential to join conservation and poverty alleviation efforts, integrate working landscapes, and provide a flow of ecosystem services upon which populations rely. Ecuadorian páramo grasslands have rapidly become the focus of compensation for ecosystem services (CES) programmes intended to conserve hydrologic services, carbon sequestration and biodiversity. This paper reviews CES programmes in Ecuadorian páramos using a combination of semi-structured interviews with project personnel, policy makers and community leaders involved in CES programme development, document analysis, and archival research. Findings indicate that, in some cases, CES schemes can support local development, with potential to contribute to poverty alleviation; however, measures of programme effects on poverty were lacking. The programmes fell across the spectrum of activity-reducing to activity-enhancing, with some functioning as protected areas and others integrating working landscapes; however, designation of land as protected did not necessarily imply more restrictive use. Finally, these cases all reflect scenarios in which limited information is available linking land use with ecosystem services production and underscore the idea that adequate understanding of ecosystem production functions continues to be a barrier to development of effective programmes, particularly where the provision of multiple ecosystem services is anticipated.

Systematic knowledge about factors affecting the willingness of societies to conserve biodiversity is still scarce. This study investigates the role of body size in national decisions on wild animal species by analysing the average body sizes of the animal species subject to species-specific legislation in the Netherlands over the period 1857–1995. Three legal objectives were distinguished, namely ‘control’, ‘use’ and ‘protection’. For most taxa, average body sizes of species were found to differ significantly between legal objectives within a substantial number of subperiods analysed. Throughout the entire period examined, protected bird, mammal, fish and mollusc species were of smaller average body size than those subject to use legislation and protected bird, mammal and mollusc species were also smaller than those subject to control legislation most of the time. Protected insects were generally larger than those subject to control or use. For vertebrate taxa, average sizes of protected species increased over the time period selected for examination, suggesting that legislation initially excluded larger vertebrates from protection, possibly partly owing to demands to maintain use of these species. The results emphasize that conservation context is important, as other studies suggest that conservation policy generally favours larger species.

Payments for environmental services (PES) have been recognized as a promising mechanism for conservation, with the potential to contribute to social objectives such as poverty reduction. This paper outlines a simple framework for assessing the potential for synergies in the implementation of PES programmes, used to analyse the new watershed conservation funding (WCF) channelled through Costa Rica's national PES programme, Pago por Servicios Ambientales (PSA). The WCF financing can only be used in a limited number of watersheds. Given this constraint, the paper examines the mechanisms by which the WCF may potentially contribute to biodiversity conservation and to reducing social development gaps. Although there is significant spatial correlation among the priority areas targeted for the objectives of watershed conservation, biodiversity conservation and social development, the availability of the WCF per unit of land in most watersheds is limited compared to the PSA programme's prevailing payment rate of US$ 64 ha−1, potentially hindering the impact of the WCF on conservation and social development. The analysis helps guide the allocation of the PSA budget in a way that complements the WCF and improves the cost-effectiveness of the PSA budget.

Evaluating the relative effectiveness of different conservation interventions is difficult and rarely undertaken. Conservation of the critically endangered saiga antelope in the Republic of Kalmykia (Russia) provides a unique experimental set-up that was used to disentangle this issue. This study uses the amount pledged for conservation, adapted from contingent valuation methods, as a measure of behavioural intention to contribute to saiga conservation, to evaluate conservation effectiveness. Semi-structured interviews were undertaken with 250 individuals in eight villages exposed to traditional ‘fences-and-fines’ conservation, livelihoods enhancement (social engagement) or low-level media coverage. The intervention employed had a direct effect on amount pledged for saiga conservation. Social engagement programmes decreased protest-bidding behaviour but resulted in low amounts pledged for saiga conservation. Those exposed to media coverage pledged the greatest amounts on average, whilst those exposed to traditional conservation had both a high level of protest bidding and low pledges from those who pledged something. The primary reason given for protest bids was that the government or international community should pay for conservation. This may be a relic from the Soviet era, and may explain low pledges for conservation under social engagement. Ecological knowledge strongly affected amount pledged. The results were influenced by cultural and demographic factors, including residence time, exposure to saigas, age, wealth and knowledge regarding conservation. This study is unusual in disentangling the effect of a conservation intervention from other factors, and proposes using amount pledged for conservation as a practical tool for evaluating the effectiveness of projects aimed at increasing awareness and promoting positive behavioural intentions towards conservation. It provides support for media awareness-raising as a successful conservation intervention.

Ecological regions aggregate habitats with similar biophysical characteristics within well-defined boundaries, providing spatially consistent platforms for monitoring, managing and forecasting the health of interrelated ecosystems. A major obstacle to the implementation of this approach is imprecise and inconsistent boundary placement. For globally important mountain regions such as the Eastern Arc (Tanzania and Kenya), where qualitative definitions of biophysical affinity are well established, rule-based methods for landform classification provide a straightforward solution to ambiguities in region extent. The method presented in this paper encompasses the majority of both contemporary and estimated preclearance forest cover within strict topographical limits. Many of the species here tentatively considered ‘near-endemic’ could be reclassified as strictly endemic according to the derived boundaries. LandScan and census data show population density inside the ecoregion to be higher than in rural lowlands, and lowland settlement to be most probable within 30 km. This definition should help to align landscape scale conservation strategies in the Eastern Arc and promote new research in areas of predicted, but as yet undocumented, biological importance. Similar methods could work well in other regions where mountain extent is poorly resolved. Spatial data accompany the online version of this article.

This review examines contributions of interdisciplinary (ID) research to understanding interactions between environmental quality, food production and food security. Global patterns of food insecurity and crop production are reviewed in relation to climate, land use and economic changes, as well as potential productivity increases compatible with environmental conservation. Interactions between food production and global processes make food insecurity a complex problem that requires ID analysis at local to global scales. Census and satellite data contribute to understanding of global cropland distribution. Analysis of land-use change exemplifies research between natural and social sciences. Quantitative modelling of global climate change impacts indicates relatively greater potential food insecurity in developing countries. International food security is increasingly interconnected through economic globalization and incentives for increased food production are required. Societies may not be able to expand available cropland without significant environmental risks; enhanced land and water productivity are the major opportunities available to increase food production. This requires renewed efforts in ID work to design and implement sound and efficient agricultural management practices. Models need to be informed by data from field experiments, long-term measurements and watershed monitoring by ground and remote sensing methods. Agricultural intensification may spare natural land but lead to increased pollution and water demand; reconciling conservation and productivity is a critical need. ID work provides many opportunities for synergies including conservation agriculture at the local level, efficient use of inputs, smarter land use taking into account spatial patterns and landscape ecology principles, and improved water management at field, system, watershed and basin levels. Goal-directed ID research is crucial, since producers, practitioners and policy makers should be involved. Geospatial, biotechnological and precision agriculture technologies linked with models can help inform strategies to achieve sustainable food production increases that maintain environmental quality. Implementation also requires ID work to overcome impediments due to human factors and facilitate adoption by farmers.