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This mixed-methods study examines an informal place- and community-based environmental education program implemented for rural, underserved high school students in Costa Rica's bio-culturally diverse Osa Peninsula. Using a community-as-pedagogy framework built on Paulo Freire's concept of a problem-posing education, we investigate how pedagogically-positioned social relationships mediate students' knowledge, perceptions, and leadership. We find linkages between existing community resources and endogenous environmental leadership, and suggest how making those connections strengthens students' perceptions of their social relationships and their ability to create meaning and take action. Through the program, students show an increase in knowledge about their local environment. They critically and socially engage with that new information, further developing networking skills in the context of community-informed environmental issues. After participating in the program, the students describe environmental leadership as requiring persistence, forethought, and a willingness to care for both the environment and community.

In this paper we suggest that a new theoretical framework is needed within environmental education in the discussion of rural, underserved communities in Latin America. We argue that a community-resources approach, comprised of funds of knowledge and social capital, should be incorporated into contemporary research on place- and community-based education and environmental behavior. The model we present builds upon previous research in the areas of education, anthropology, social capital, and environmental education. These perspectives are discussed in accordance with their relevance to high school students in one of the most bio-diverse regions of Central America: the Osa Peninsula of Costa Rica. In this context, we suggest that promoting environmental behavior is both contextualized by and dependent upon social and community interactions, or 'mediations,' after Lev S. Vygotsky. We believe that the framework presented here may contribute to increased socio-economic, academic, and environmental benefits for underserved, Latin American communities.

Species that are strong interactors play disproportionately important roles in the dynamics of natural ecosystems. It has been proposed that their presence is necessary for positively shaping the structure and functioning of ecosystems. We evaluated this hypothesis using the case of the world's largest parrotfish (Bolbometopon muricatum), a globally imperiled species. We used direct observation, animal tracking, and computer simulations to examine the diverse routes through which B. muricatum affects the diversity, dispersal, relative abundance, and survival of the corals that comprise the foundation of reef ecosystems. Our results suggest that this species can influence reef building corals in both positive and negative ways. Field observation and simulation outputs indicated that B. muricatum reduced the abundance of macroalgae that can outcompete corals, but they also feed directly on corals, decreasing coral abundance, diversity, and colony size. B. muricatum appeared to facilitate coral advancement by mechanically dispersing coral fragments and opening up bare space for coral settlement, but they also damaged adult corals and remobilized a large volume of potentially stressful carbonate sediment. The impacts this species has on reefs appears to be regulated in part by its abundance-the effects of B. muricatum were more intense in simulation scenarios populated with high densities of these fish. Observations conducted in regions with high and low predator (e.g., sharks) abundance generated results that are consistent with the hypothesis that these predators of B. muricatum may play a role in governing their abundance; thus, predation may modulate the intensity of the effects they have on reef dynamics. Overall our results illustrate that functionally unique and threatened species may not have universally positive impacts on ecosystems and that it may be necessary for environmental managers to consider the diverse effects of such species and the forces that mediate the strength of their influence.

Remote areas harbor some of the world's most undisturbed ecosystems. Major conservation gains can be made by effectively protecting nature in these remote zones. Conducting conservation work in remote settings presents both unique challenges and promising opportunities. We discuss how five commonly used approaches for conservation (buy and protect conservation; conservation motivated by the intrinsic values of nature; ecosystem service based conservation; ecotourism driven conservation; and conservation enabled by community planning) can be optimally applied to protect ecosystems in these special settings. In this discussion we draw examples from two model remote sites: Palmyra and Tabuaeran Atolls. Spatial analyses conducted using population density as a proxy for remoteness indicate that many existing recognized protected areas already include remote regions, but that the vast majority of the overall remote zones on the planet are not yet formally protected. Initiating discussions that directly consider both the roadblocks and opportunities for conservation in remote areas will help increase our odds of successfully protecting biodiversity in these unique and strategically important contexts. © 2013 Elsevier Ltd.