To support moves towards more sustainable modes of natural resource management, the research community has been engaged in an evaluation of paradigms, theories and methods which might provide useful and usable insights into such a complex problem set. A particularly influential family of theoretical models concerned with the processes and dynamics of species evolution has been adopted from the fields of biology and ecology. This paper scrutinizes the relevance of biological evolutionary theory to sustainable natural resource management beyond identification of the core analogy, namely that both natural resource management and ecological systems are characterized by multiple interacting elements requiring systemic interpretation. A review of the workings of co-evolutionary theory within its intellectual homeland of biology and ecology leads to a critical evaluation of its use as a descriptive model outside of these domains. Findings from this assessment identify a number of fractures in meaning as the co-evolutionary model is transferred between disciplinary fields, suggesting that the transposition has been conducted without sufficient rigour or consistency. A measured reinterpretation of the applicability of the co-evolutionary model to natural resources management is thereby undertaken. Using water management as a context, the paper posits a series of phenomena which might provide a focus for the application of the co-evolutionary model outside of biology and ecology. In conclusion, the paper argues that the research community needs to move beyond a consideration of the complex implications of co-evolutionary processes to the establishment of a firm, process-based definition of co-evolution as a type of change.

Higgins (2005) has shown that increased human physical activity in the USA could lead to both improvements in physical health and reductions in oil consumption by motor vehicles, thereby also reducing carbon emissions. It is an intriguing idea and, as the health costs of obesity are so high, the potential health and environmental savings could be vast. These questions deserve wider attention, as all the trends suggest that consumption of both fossil fuels and food calories (combined with more sedentary lifestyles) will continue to rise in the coming years.

The BR-163 Highway (Fig. 1) was originally built by the Brazilian Army in 1973 and 1974. It has remained passable since, although poor road conditions in the unpaved portion (the 646-km portion in the state of Pará from the border with Mato Grosso to Trairão) impede use of the road as a significant export route. Reconstructing the highway has been a (so-far unimplemented) part of an evolving series of plans for massive expansion of infrastructure: Brasil em Ação (Brazil in Action) for 1996–1999, Avança Brasil (Forward Brazil) for 2000–2003, and the Pluriannual Plan for 2004–2007 (Laurance et al. 2001; Fearnside 2002). Soybean plantations in the northern part of the state of Mato Grosso have been rapidly expanding, partly in anticipation of the BR-163 being reconstructed and paved (Fearnside 2001). The governor of Mato Grosso since 2003 is Brazil's largest soybean entrepreneur and a major force in inducing the federal government to pave the road. With the construction of the BR-163, northern Mato Grosso would be linked to the ports of Miritituba and Santarém (Fig. 1), halving the current distance for transportation, as currently soybeans from northern Mato Grosso are exported through the port of Paranaguá in the state of Paraná. A future plan would take the soybeans by rail from Cuiabá to Santos. Cost savings for soybean export of US$ 11.6 per tonne relative to the rail route through Santos (Alencar et al. 2005) provide an economic argument for the BR-163 project. Soybean production in northern Mato Grosso was 3.61 million tonnes in 2004 (Alencar et al. 2005), worth approximately US$ 813 million. Nevertheless, even with substantial monetary benefits for the BR-163, the various forms of impact from the project must be quantified and compared to the benefits before a decision is made (Fearnside 2005).

Understanding the nature and role of experiential knowledge for environmental conservation is a necessary step towards understanding if it should be used and how it might be applied with other types of knowledge in an evidence-based approach. This paper describes the nature of experiential and expert knowledge. It then discusses the role of experiential knowledge as a complement to scientific knowledge and explains the interplay between experiential knowledge with conservation research and practice using a simple conceptual model of how individuals learn. There are five main conclusions: (1) because experiential knowledge will always play a role in decision-making, enhancing ability to learn from experiences (including research) will have a significant influence on the effectiveness of conservation outcomes; (2) while experiential knowledge is qualitatively very different from quantitative information, both are important and complementary; (3) some experiential knowledge can be expressed quantitatively, but experiential knowledge can be difficult to isolate as single facts or propositions and qualitative methods will therefore often be required to elicit experiential knowledge; (4) because each person's expertise is unique, when using experiential knowledge the extent of a person's experience and its relevance to a particular problem need to be specified; and (5) as with any form of knowledge, there are limitations to that derived from personal experience. Synthesis and communication of research is therefore essential to help prevent erroneous thinking and, where possible, experiential knowledge should be used in conjunction with other types of information to guide conservation actions.

Many conservation organizations have attempted to reduce local threats to protected areas (PAs) by providing environmental education programmes in neighbouring communities. There is a great need to understand the effectiveness of these programmes in promoting support for PAs and ultimately reducing threats to biodiversity. La Selva Biological Station, a private PA in Costa Rica, has become increasingly threatened by illegal hunting in the PA and deforestation and land degradation in surrounding areas. The Station has responded with several outreach projects including an annual free visiting day. This study used a survey instrument to evaluate the benefits of local residents visiting La Selva. Specifically, three questions were asked: (1) is there a difference in ecological knowledge of local residents among residents who have visited the Station and those that have not; (2) does an increase in knowledge relate to a perceived benefit from the PA; and (3) does recognition of a perceived benefit among local people result in fewer residents admitting to hunting or desiring to hunt in the PA? This study showed that those residents who had visited the station had a greater understanding of ecological concepts than those residents that had never been to the station, suggesting that such visits provided educational opportunities. Men also had greater ecological knowledge than women. Additionally, residents were more likely to value the PA if they had a greater knowledge of local ecology and conservation. Increased knowledge and recognition of perceived benefit however, do not necessarily translate into lifestyle changes that benefit conservation; no relationship was detected between residents who stated they benefited from the PA and those who said they did not have a desire to hunt, but younger respondents were more likely to express an interest in hunting than older respondents. The results presented here suggest that protected areas generally may benefit from visitation by local residents. However, further study is needed to determine if such outreach activities actually decrease local threats to conservation efforts, such as hunting.

Many seabird species of conservation concern have large geographic ranges that span political borders, forcing conservation planners to facilitate their protection in multiple countries. Seabird conservation planning within the seabird-diverse California Current System (CCS) marine ecoregion presents an important opportunity for transboundary collaborations to better protect seabirds across the USA/México border. While seabird populations in the USA are relatively well-studied and well-protected, the status of seabird populations in the Mexican region of the CCS is not well known and seabird colonies have been virtually unprotected. This study synthesizes and supplements information on breeding seabird diversity and distribution, identifies and ranks threats to seabirds and evaluates conservation capacity in the Mexican CCS to provide a framework for transboundary seabird conservation throughout the CCS ecoregion. Island-breeding seabirds in México support 43–57% of CCS breeding individuals, 59% of CCS breeding taxa and a high level of endemism. Connectivity between populations in México and the USA is high. At least 17 of the 22 extant Mexican CCS breeding seabirds are USA/México transboundary breeders or foragers, 13 of which are federally listed in the USA or México. Introduced predators and human disturbance have caused multiple seabird population extirpations in the Mexican CCS because breeding colonies lack legal protection or enforcement. However, conservation capacity in this region has increased rapidly in recent years through the establishment of new protected areas, growth of local conservation non-governmental organizations, and increase in local community support, all of which will allow for more effective use of conservation funds. Transboundary conservation coordination would better protect CCS seabirds by facilitating restoration of seabird colonies in the Mexican CCS and enabling an ecoregion-wide prioritization of seabird conservation targets to direct funding bodies to the most cost-effective investments.

Conservation covenants (or easements) are flexible but legally enforceable documents attached to a land title restricting the use of that land, providing for the protection of important conservation values, while allowing the landholder to retain possession. Given the attractiveness of covenants to those who seek to expand national and regional nature conservation initiatives, it is important to understand landholder motivations for participation in programmes that covenant for nature conservation. This paper examines the likely influences on landholder decision making when it comes to conservation initiatives. A review of literature highlights key motivations and determinants, such as landholder demographics and the nature of the land tenure in question, their knowledge and awareness of the programme, financial circumstances, and perceptions of financial and other risks and benefits of the programme itself, including incentives and compensation. Underpinning, or mediating, the decision-making processes will be landholder philosophies and values, and five constructs are determined from the review, namely economic dependence on property, private property rights, confidence in perpetual covenant mechanisms, nature conservation equity and nature conservation ethic. Using these constructs, a series of explicit hypotheses is drawn, applicable to agencies dealing with conservation covenants and testable through an adaptive management approach. A conceptual model is presented to show hypothesized relationships between motivational factors and the five constructs that will lead to the uptake of covenants by landholders, providing direction for policy makers and managers of incentive programmes for nature conservation on private lands.

Pretty (2006) offered a valuable perspective on the psychological benefits of exercise in green environments. This makes intuitive sense, for who among us does not recognize the personal benefits we receive from being active and surrounded by nature's beauty? The quantitative support that Pretty (2006) offered confirms this anecdotal experience, and provides an extremely valuable contribution to the debate.

Little is known about the impacts of intensive shellfish farming on intertidal ecosystems. To assess such impacts, several indices of ecosystem structure and select geochemical characteristics were contrasted among three intertidal regions, which represented a gradient of shellfish farming activities, namely (1) no active aquaculture, (2) actively farmed for three years and (3) actively farmed for five years. All three intertidal regions were located in Baynes Sound (British Columbia, Canada) and were geographically similar. Among the three beaches, species richness, community composition, bivalve abundance, biomass, distribution, and composition and surficial sediment per cent organic matter (carbon) and silt were compared. The intertidal regions that had been used for farming for three and five years had lower species richness, different bivalve composition, abundance and distributions, and a foreshore community dominated by bivalves, as compared to the intertidal region where no active farming occurred. Beaches that were actively farmed also had greater accumulations of organic matter and silt. Simplification of the intertidal benthic community, coupled with accumulations of organic matter and increased siltation, may have altered the ecology of the foreshore region used for intense shellfish harvesting. To access the foreshore for shellfish farming in a sustainable manner, studies are needed to determine the scale to which intensive use of the foreshore for shellfish purposes alone is feasible without undue harm to the environment.

Traditional ecological knowledge (TEK) has become a focus of increasing attention by natural resource managers over the past decade, particularly in the context of the shared management authority between resource users and government agencies (co-management). Little work has been done on how TEK can be successfully integrated with science and applied in contemporary science-based resource management institutions, and the efficacy and legitimacy of co-management and associated attempts to document TEK or integrate it with science have recently been questioned. The cooperative research programme of one co-management group, the Alaska Beluga Whale Committee (ABWC), was studied to describe how TEK and science are integrated and applied in the research process, document perceptions and attitudes of native hunters and scientists towards TEK and science, and identify organizational characteristics that facilitate knowledge integration. Hunters and TEK played a variety of roles in ABWC's research programme, including hypothesis generation, sample collection and data interpretation. Hunters and scientists defined TEK similarly, but differed in their views of science, which hunters often perceived as a tool of state control. Despite political undercurrents, the ABWC displayed several indicators of successful knowledge integration. Organizational characteristics that facilitated integration included a membership structure fostering genuine power-sharing and a range of opportunities for formal and informal interactions among hunters and scientists leading to long-term relationships and an organizational culture of open communication and transparency in decision-making. Given the importance of long-term relationships between scientists and hunters for successful knowledge integration, this study raises questions about (1) the potential for meaningful integration in short-term projects such as environmental impact assessment and (2) the use of TEK documentation studies in the absence of other forms of active participation by TEK- holders.

This paper provides the first analysis of imports and exports of fish leather by the USA. Estimates of minimum levels of trade were obtained from the records of the United States Fish and Wildlife Service for 1997–2001, and possible conservation consequences were considered. Data show that imported leather items used the skins of at least 51 types of fish. Of the 41 identified to species level, six were freshwater fish, eight diadromous and 27 were fully marine. Eels and hagfishes (marketed as ‘eelskin’; eight named species), stingrays (10 named species) and sharks (15 named species) dominated the trade. An average of 725 000 fish-leather products, worth over US$ 6 million, was imported each year to the USA. A significant decline in fish leather imports over the five-year period studied derived largely from changes in ‘eelskin’ imports. Fish leather in the USA was reportedly sourced primarily from the Republic of Korea, mainland China and Thailand, although the records were flawed. About 93% of leather products were obtained from wild fish. Exports from the USA totalled approximately 5% of imports by volume. Many of the fish species comprising the largest imports for leather were characterized by low resilience to exploitation, with one-third of known species considered threatened or near threatened by the World Conservation Union (IUCN). This pilot assessment indicates the need for better record keeping if sustainability of fish exploitation for leather is to be evaluated.

Traditional resource management (TRM) systems in tropical forests can provide insights on sustainable resource use, but despite the growing prevalence of degraded tropical forest habitats, few studies have assessed the relationships between TRM and conservation in these environments. In Hawaii, the traditional gathering of native wild plants used for hula (chants and dance) and lei (garlands) is carried out in forests increasingly dominated by alien invasive species. Ethnographic methods and exploratory experimental harvests were employed to examine: gathering of hula plants in the past and present, ecological impacts of contemporary gathering practices of three important native hula species in alien-dominated forests, and relationships between traditional practices and past and modern conservation. Past gathering traditions included practices to increase and conserve hula plant populations. Harvest of Microlepia strigosa fern fronds significantly decreased M. strigosa cover over the short term. Cover of alien species significantly increased after frond-harvest of Sphenomeris chinensis. Regeneration of the fruit-harvested shrub, Melicope anisata, was significantly negatively correlated with the level of understorey invasive species. These results suggest that in Hawai‘i’s alien-dominated forests, gathering of some species may increase spread of alien invasive species or exacerbate regeneration problems caused by invasive species. However, some expert cultural practitioners have adapted traditional practices to ensure hula plant conservation by incorporating weeding of alien invasive species into their protocols. The re-strengthening and adaptation of traditional Hawaiian knowledge and social institutions to the modern context can provide opportunities to improve conservation of Hawai‘i’s culturally-important native plants and their habitats.

During the second half of the twentieth century, southern Brazil underwent rapid industrialization and urbanization. In earlier historical periods in Europe and North America, these trends have contributed to a forest transition in which deforestation gives way to forestation. In a developing country, like Brazil, with a more skewed income distribution and a larger rural underclass, industrialization and urbanization may not give rise to a forest transition. These competing theoretical expectations were tested with data on forest cover change from the Brazilian censuses of 1970 through 1995/1996 for the state of Santa Catarina in southern Brazil. The analyses show forestation replacing deforestation between 1975 and 1980. An increase in the extent of planted forests close to urban areas explains the turnaround in forest cover trends. Because the planted forests contain relatively few native plant species, the expansion of these forests does not ease the biodiversity crisis. The re-emerging second Atlantic forest represents a smaller, less diverse and degraded version of the first Atlantic forest.

Human population density is globally three times higher along the coasts than inland, and thus environmental impacts of human activities are greater in magnitude on coastal ecosystems such as beaches and dunes. Vulnerability assessment (the loss of capacity to return to the original dynamic state after system displacement) is thus necessary to evaluate the conservation status and determine the most relevant disturbance events. Twenty-six sites along 902 km of Gulf of Mexico coastline, varying in conservation status and sedimentary dynamics, were sampled. At each site a vulnerability index (VI) was calculated based on variables that described geomorphological condition, marine influence, aeolian influence, vegetation condition and human effects. Vulnerability was very variable along the coast and only 19% of the sampled locations (mostly in the central Gulf of Mexico) displayed low vulnerability. Cluster analyses of the values assigned to the checklists for each location grouped the studied sites into three, according to their VI values. Low vulnerability locations had abundant sediment supply and low human impact. Locations with medium to high VI were mostly affected by their natural geomorphological and marine features and had medium to intense human activities. Management strategies should consider the observed variability in vulnerability, the natural dynamics of these systems and the role of human activities and interests, in order to achieve adequate policies and establish well-informed priorities for integrated coastal zone management.

The effects of low-level aircraft over-flights on behaviour of harlequin ducks (Histrionicus histrionicus) breeding in central Labrador were quantified during 2000–2002. The Canadian Department of National Defence supports a low-level training programme in the 130 000 km2 Military Training Area of Labrador involving military jets. The Institute for Environmental Monitoring and Research (IEMR) undertakes scientific research into environmental impacts of low-level military jet over-flights. A suite of 17 behavioural categories of paired male and female harlequin ducks was modelled, and a canonical variable representing alert behaviour, inactivity on the water and decreased inactivity out of water in response to over-flights represented 73.1% of the variance in the data cluster and provided marked separation of disturbed and undisturbed groups. Behavioural responses of harlequin ducks to military jets were 23 times stronger than their responses to floatplanes, helicopters and military cargo planes, and the significant interaction of aircraft type and noise indicated that noise may be the primary stressor affecting behaviour. A quadratic response of the canonical variable to noise generated from aircraft during standardized 30-minute observation periods was defined. The multivariate analyses were more robust because they indicated covariance in behavioural categories associated with disturbance that was not originally detected in univariate analyses, suggesting the importance of integrating behaviours other than overt responses. The significant effects of military jet over-flights on harlequin duck behaviour emphasize the need to evaluate potential population consequences of aircraft disturbance.

The external factors that influence the environmental, social and economic performance of logging companies were studied using a questionnaire submitted to 30 logging concessions in five countries of the Congo Basin. This paper analyses socioeconomic constraints and environmental impacts experienced by these concessions, as well as their response to major external drivers of change. Concessionaires considered investment and operating finance their main constraint, followed by insufficient technical and human capacities, and inconsistent application of official regulations. Environmental problems directly produced by concessions' operations represented around one-third of the total score for environmental problems reported. Damage caused by construction of logging roads and erosion were identified as the main issues. Induced problems (two-thirds of the total score) were dominated by hunting, with encroachment and illegal logging perceived as much less significant. Policies, infrastructure, markets and technology are key external drivers of change in concessions' practices, while regional and international forestry institutions reportedly have the least influence, reflecting an emerging scepticism about the proliferation of international institutions and initiatives promoting sustainable forestry.

As part of a programme of landscape-scale habitat surveillance in the United Kingdom (UK), the effect of grassland sampling intensity on the outcome of numerical classification was assessed. Sample quadrats from two regions of the UK were available for post priori analysis; a random sample from Great Britain (GB), with grasslands sampled in proportion to area, and an independent stratified random sample from Northern Ireland (NI), with similar numbers of quadrats from agricultural and semi-natural grassland habitat strata. Classification of a combined area-proportional (balanced) random sample from GB and NI showed the species composition of UK grasslands to be determined largely by climate, landscape structure and land-use intensity. The classification was influenced primarily by the greater number of eutrophic agricultural grassland quadrats and semi-natural grassland quadrats of the larger GB study area. The semi-natural grasslands of NI, represented by a small number of quadrats, had little influence. Classification of a stratified NI sample combined with an area-proportional GB sample was influenced most by the NI semi-natural grassland quadrats. The structure of the classifications depended on sampling intensity. Vegetation classification should be derived from a balanced sample so that it is representative and its application does not lead to decisions being directed at classes of vegetation (or estimates derived from them) that are weighted by sampling intensity. Area-proportional sample design linked explicitly to landscape structure satisfies the requirement for a balanced classification. The issue of data-balance is relevant in conservation management and environmental assessment, where stratification is a commonly accepted procedure to reduce sampling effort, or is carried out to sample rare or ecologically interesting vegetation. It applies to landscape-scale vegetation classifications used for environmental assessments and to classifications that compare plant communities between regions (as in phytosociological studies). The issue is also important when combining environmental databases from international sources for classification purposes.

Tropical forests of the Amazon Basin are being rapidly converted to agricultural land uses and fallow land, resulting in accelerating rates of forest loss in one of the world's most biodiverse ecoregions. This process has been extensively described and modelled, but as yet there has been no formal test of how the spatial patterns of deforested and fragmented areas change with the spatial scale of forest clearings. It was hypothesised that different land-use practices are driving small and large clearings, with small-scale cultivators often creating small, irregularly shaped clearings and large-scale ranchers and soy farmers creating larger, more regular-shaped clearings. To quantitatively test this hypothesis, Mandelbrot's theory of fractals was applied to deforested areas in the Brazilian Amazon to test for scale-invariance in deforestation patterns. The spatial pattern of deforestation differed between small and large clearings, with the former creating more complex landscapes and with a threshold occurring at c. 1200 ha in area. As a consequence, the sizes and shapes of forest clearings, and hence the relative vulnerability of the remaining forest to edge, area and isolation effects, may differ systematically between landscapes with different deforestation drivers. Further tests of this hypothesis are needed to assess its efficacy in other tropical landscapes and geographical locations.

Yasuni National Park and Biosphere Reserve in Ecuador's Amazon basin is home to the Huaorani and an area of high conservation value. As a result of oil development in the early 1990s, a road was constructed in the northern region of the Park. Three Huaorani communities have since been established in proximity to the road, two of them when the road was built, ten years prior to this study, and the third in a previously uninhabited area. This allowed for a natural experiment comparing harvest compositions across communities of different ages at one point in time. Harvest profiles suggest that the spider monkey Ateles belzebuth is facing local depletion near the two old communities and the howler monkey Alouatta seniculus may also be depleted near one of the old communities. That the two oldest communities still harvested a relatively high number of other vulnerable species is attributed to their use of the road to increase forest access. The spider monkey appears to be the first species to become depleted in persistently hunted areas.

In the context of action research in community forests, stakeholders' values for biodiversity can be elicited, communicated and understood with the help of a multidimensional conceptual framework. This incorporates levels of diversity (genes, species, habitats and processes), types of values (direct use, indirect use, option and existence) and stakeholders. This paper explores the effect of using this framework on forest monitoring, learning and communication, and wider implications for conservation, in Baglung District (Nepal). Monitoring was initially an unfamiliar concept to villagers, but the process clarified its purpose, whilst helping to elicit and exchange values and knowledge amongst stakeholders. This precipitated proposals for silvicultural experimentation and social inquiry into the diversity of users' needs. The framework allowed the translation of local value statements into categories recognized by other actors. It aided external stakeholders in understanding the factors contributing to values held by community forest users. Villagers' appreciation of ‘quality’ forest did not necessarily equate to the most ‘biodiverse’ forest, but rather the greenest and densest and that stocked with useful species. Elite domination, tenure and access to markets affected values assigned and behaviour in forest management. Elicitation of these values provoked questioning of forest management decisions and benefit sharing among community forest users. This, in turn, stimulated more democratic forest management and more inclusive, wide-ranging biodiversity values. Participatory monitoring is more conceptually challenging than is usually recognized, and the links between equity and conservation merit further attention in different cultural contexts.