Available with subscription or purchase
Using Janzen–Connell to predict the consequences of defaunation and other disturbances of tropical forestsBackgroundThe Janzen–Connell (J–C) model describes how seed dispersal and mortality shape tropical forest diversity. According to the model, seeds that fall close to their parent trees suffer high mortality due to host-specific predators, pathogens, and herbivores. In contrast, seeds dispersed farther away have a better chance of survival. Defaunation, particularly the loss of large-bodied seed dispersers, disrupts this balance by reducing seed dispersal distances. This study applies the J–C model to predict how defaunation and other disturbances affect tree recruitment and forest composition. Available with subscription or purchase |
Cascading effects of contemporaneous defaunation on tropical forest communitiesBackgroundDefaunation, caused by hunting and habitat fragmentation, is a major threat to biodiversity in tropical forests. It disproportionately affects large-bodied vertebrates, which play key roles as seed dispersers, seed predators, and herbivores. The loss of these animals can have cascading effects on plant populations, altering species composition, seed dispersal, and plant recruitment. This study reviews empirical evidence from 42 studies to understand how defaunation influences plant-animal interactions, plant demography, and overall community diversity. Available with subscription or purchase |
Forest carbon offsets and carbon emissions trading: Problems of contractingBACKGROUND:Monitoring and measuring carbon fluxes in forestry are complex and costly, exacerbated by asymmetric information and inadequate institutions, leading to unstable values in carbon trading. Good governance is essential for effective contracting in the carbon market but often falls short, leading to misaligned incentives and principal-agent problems. These issues frequently delay successful contracting, potentially resulting in corruption and disputes over carbon offset claims. Available with subscription or purchase |
The contradiction of the sustainable development goals: Growth versus ecology on a finite planetBackgroundThe Sustainable Development Goals (SDGs), adopted by the United Nations in 2015, promote a holistic vision of development that recognizes the interconnectedness of poverty, underdevelopment, and environmental concerns. Comprising 17 goals and 169 specific targets, the SDGs reflect a shift in development theory, emphasizing that human flourishing depends on addressing ecological degradation. However, the framework reveals a fundamental contradiction. Goals 6, 12, 13, 14, and 15 advocate for environmental protection and “harmony with nature,” while Goal 8 emphasizes the pursuit of continued global economic growth. Available with subscription or purchase |
Foresters' beliefs about farmers: a priority for social science research in social forestryBackgroundAvailable with subscription or purchase |
Livelihoods, Forests, and Conservation in Developing Countries: An OverviewBACKGROUND:Poverty is a huge challenge, with 2.8 billion of the world’s 6 billion people living on less than $2 a day. The paper highlights the alarming extent of poverty in developing countries and addresses the rapid deforestation, which compromises ecological integrity and exacerbates social inequities. The authors focus on exploring whether poverty alleviation and forest conservation can be aligned as complementary rather than conflicting objectives. Available with subscription or purchase |
Forest concessions in the Maya Biosphere Reserve, Guatemala: A decade laterBACKGROUND:Over the past few decades, there has been a significant shift in conservation strategies from traditional command-and-control approaches to more inclusive, community-focused philosophies. This transition was driven by the recognition of the failures of strict protectionism, which often led to diminished ecological and institutional resilience. Simultaneously, the recognition of rural communities as both impacted by and impactful within natural systems has grown, advocating for incentive-based, participatory strategies to address human-environment conflicts effectively. Available with subscription or purchase |
Reforesting Bare Hills in Vietnam: Social and Environmental Consequences of the 5 Million Hectare Reforestation ProgramBackgroundAvailable with subscription or purchase |
Agrosilvopastoral Systems: A Practical Approach Toward Sustainable AgricultureBackgroundAvailable with subscription or purchase |
Evaluating alder-endophyte (Alnus acuminata-Frankia-Mycorrhizae) interactionsBackgroundThe study examines the interactions between Alnus acuminata (a nitrogen-fixing tree), Frankia (a nitrogen-fixing actinomycete), and vesicular-arbuscular mycorrhizae (VAM), specifically Glomus intra-radices. These symbiotic relationships are significant in upland areas of Costa Rica, Colombia, and Venezuela, where A. acuminata grows alongside pastures. Frankia forms root nodules that fix atmospheric nitrogen, while VAM enhances phosphorus uptake, crucial for plant growth in nutrient-poor soils. The study aims to understand the effects of these interactions on nitrogen fixation and seedling development under varying phosphorus levels. Available with subscription or purchase |
