Treesearch

Mona Island protects one of the most important remnants of Caribbean dry forests and hosts a high diversity of rare and endangered plant and animal species. Feral ungulates (goats and pigs) were introduced to the island ~500 y ago, and their populations may be threatening the conservation of Mona Island’s native biodiversity. In this study, we used permanent fenced and unfenced plots at 4 different depression-forest sites on Mona Island to assess longterm (10-y) understory vegetation dynamics and the potential responses of this vegetation stratum to ungulate exclusion. Depression forests...

The complex three-dimensional (3-D) structure of tropical forests generates a diversity of light environments for canopy and understory trees. Understanding diurnal and seasonal changes in light availability is critical for interpreting measurements of net ecosystem exchange and improving ecosystem models. Here, we used the Discrete Anisotropic Radiative Transfer (DART) model to simulate leaf absorption of photosynthetically active radiation (lAPAR) for an Amazon forest. The 3-D model scene was developed from airborne lidar data, and local measurements of leaf reflectance, aerosols, and...

Research on the influence of social network structure over flows of knowledge in support of sustainability governance and action has recently flourished. These studies highlight three challenges to evaluating knowledge-action networks: first, defining boundaries; second, characterizing power distributions; and third, identifying obstacles to knowledge sharing and connectivity. We present concepts from social network analysis (SNA) commonly found to influence knowledge flows. We examine applications of SNA from across the social sciences and use the case of land governance in San Juan,...

In this paper, I examine the socioeconomic dynamics and human–environment interactions in the region surrounding the El Yunque National Forest (EYNF) in northeastern Puerto Rico and their implications for policy development and sustainable resource use. As part of a larger, comprehensive assessment of the conditions and trends of the EYNF and broader region, I collected and analyzed demographic, economic, human health and well being, and other social and cultural data. Herein, I discuss the implications of my findings in terms of the management and conservation of the EYNF. I also present...

Urban sustainability discourse promotes the increased use of green infrastructure (GI) because of its contribution of important ecosystem services to city dwellers. Under this vision, all urban green spaces, including those at the household scale, are valued for their potential contributions to a city’s social-ecological functioning and associated benefits for human well-being. Understanding how urban residential green spaces have evolved can help improve sustainable urban planning and design, but it requires examining urban processes occurring at multiple scales. The interaction between...

We studied the response of Prestoea montana (Sierra Palm, hereafter Palm) brakes and a Palm floodplain forest to hurricanes in the Luquillo Experimental Forest in Puerto Rico. Over a span of 78 years, 3 hurricanes passed over the study sites for which we have 64 years of measurements for Palm brakes and 20 years for the Palm floodplain forest. For each stand, species composition, species density, basal area, tree density, rates of tree ingrowth and mortality, and importance value of tree species were assessed. We also estimated stand and Palm population aboveground biomass for the Palm...

This manuscript contains an overview of the 16th meeting of Caribbean Foresters that resulted in the establishment of a network of forest plots throughout the region with the purpose of increasing understanding of the patterns of long-term forest dynamics. Research projects in the network will improve collaboration among those working in Caribbean forests and will facilitate development of conservation plans consistent with the responses of Caribbean forests to hurricanes and other types of disturbances.

Throughout the Caribbean, conservation is ecologically, politically, and socially challenging due to a number of factors including globalization, climate change, loss of biodiversity, and the spread of invasive species. Relationships between organizations and institutions that govern the region’s natural and cultural resources are key to conservation success as partners work to implement plans to meet science, capacity, and information needs. However, the complex challenges involved in conservation work and tenuous relationships among organizations can result in a “knowing–doing gap”....

Governmental and nongovernmental organizations charged with managing natural resources increasingly emphasize the need to work across jurisdictional boundaries. Their challenge is to manage shifting resources under rapidly changing climate and land-use scenarios. Scientists, resource managers, and conservation planners, and their organizations and agencies routinely collaborate on projects to solve specific problems. Cooperative frameworks to programmatically address complex social–environmental issues and develop shared research, planning, and implementation priorities are relatively new....