A5055994303- Forest ecology and management
- Ecology and Vegetation Dynamics Studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Forest Management and Policy
- Archaeology and ancient environmental studies
- Phytochemical compounds biological activities
- Agroforestry and silvopastoral systems
- Plant Pathogens and Fungal Diseases
- Seedling growth and survival studies
- Conservation, Biodiversity, and Resource Management
- Genetic diversity and population structure
- Chromosomal and Genetic Variations
- Isotope Analysis in Ecology
- Botanical Research and Applications
- Outsourcing and Supply Chain Management
- Botany and Geology in Latin America and Caribbean
- Fire effects on ecosystems
- Legal case studies and regulations
- E-Government and Public Services
- RNA Research and Splicing
- Forest Ecology and Biodiversity Studies
- Turfgrass Adaptation and Management
- Plant and soil sciences
- Amazonian Archaeology and Ethnohistory
- Reproductive Biology and Fertility
University of Puerto Rico at Río Piedras
2023
Institute for the Future
2004-2020
Center for International Forestry Research
2016
Oldham Council
2016
Yale University
2016
American Society of Law, Medicine and Ethics
2008
International Institute of Tropical Forestry
2002-2007
Southern Connecticut State University
2006
Phillips Exeter Academy
1998
In natural forests of Central Africa, several studies indicate a dramatic decrease in commercial trees, including species concern for conservation. Enrichment planting with these will favor both the long-term recovery their populations and biodiversity conservation logged forests. this study, we analyzed survival growth 23 plantations. Fourteen 0.2–1.1 ha mixed plantations consisting single-species 15 × m blocks were studied 5 years logging concession southeastern Cameroon. The plantation...
Breeding system, population dynamics, and the underlying genetic structure of orchid pop- ulations should reflect their evolutionary potential. We examined populations repre- senting a widespread, obligately outbreeding epiphyte Greater Antilles, Tolumnia variegata. sampled 14 from Puerto Rico, Dominican Republic, Cuba for isozyme variation using horizontal starch-gel electrophoresis. resolved scored twelve loci six enzymes, found that all were polymorphic at species level allele frequencies...
One concern in the ongoing debate over conservation status of mahogany has been possibility that selective logging, as a form negative phenotypic selection, might have led to deterioration genetic quality populations. The incidence and degree such ‘dysgenic’ effects is discussed, based on consideration logging practices, their expected empirical data selection forest trees. Loggers tended avoid diseased, small, very large poorly-formed individuals, consequently increase proportion poor...
Abstract Understanding carbon (C) dynamics of the silvopastoral systems can help mitigate greenhouse gas emissions. The aim this study was to evaluate C concentration and storage in above‐ belowground tree biomass as well soils fodder banks Leucaena leucocephala (Lam.) de Wit, Guazuma ulmifolia or a combination both species. quantified by destructive sampling. We also obtained samples from soil pits, 20‐cm deep, determined bulk density organic concentration. mixed species produced more...
Abstract Climate change and disturbance make it difficult to project long‐term patterns of carbon sequestration in tropical forests, but large ecosystem experiments these forests can inform predictions. The Canopy Trimming Experiment (CTE) manipulates two key components hurricane disturbance, canopy openness detritus deposition, a forest Puerto Rico. We documented how the CTE real affected tree recruitment, biomass, aboveground storage over 15 years. In treatments, we trimmed branches, did...
Purpose – The purpose of this paper is to explore the impact public digital services on urban/suburban residents, uncover current usage and levels satisfaction with resources/content in urban libraries (networked computers specific information infrastructure designed free for use).
Abstract The land use of the ancient Maya strongly affected environment previously forested Lowlands. A forest grew back after “collapse”, some 1100 years ago. Two activities could have had widespread effects on tree species composition regrown, modern forest. First, in areas with topographic relief agriculture caused substantial soil erosion and accumulation, changing depth character. Soil character is associated differential distributions abundances many To extent that landscape differs...
We studied species composition and spatial distributions of tree species, the underlying topography soil, in subtropical forests northwest Belize, a region Maya Lowlands. Our goal was to learn how much vary are predictable over landscape. The study done old-growth, moist forest on limestone-derived soil. identified all trees ≥10 cm DBH 209 400-m 2 plots. For each plot, we characterized topographic setting analyzed soil nutrients texture. recorded 3,984 individual ∼140 used 3,775 individuals...
Abstract Swietenia species are the most valuable American tropical timbers and have been heavily overexploited for decades. The three listed as either vulnerable or endangered by IUCN included on Appendix II of CITES, yet illegal exploitation continues. Here, we used restriction associated DNA sequencing to develop a new set 120 SNP markers sp., suitable MassARRAY®iPLEX™ genotyping. These can be population genetic studies timber tracking purposes.
The ability to predict growth and potential yield is essential for planning forest management. Here we developed a narrow size-class diameter model simulate in mature plantation (age 42 years) of big-leaf mahogany (Swietenia macrophylla King) subtropical moist Puerto Rico. We calculated optimal rotation age by means the biological economic criteria. analyses involved measurements over 31 years variety contrasting scenarios, which were evaluated Faustman formula sensitivity analyses. was 90...
This section contains all the presentation abstracts from “International Forestry” track of 2015 Society American Foresters National Convention, held November 3-7 in Baton Rouge, Louisiana.
We review research on ancient and modern environments in the Programme for Belize Archaeology Project (PfBAP), focusing studies of vegetation. A goal is to show how these complement each other. To describe environment, paleobotany uses fossil pollen, phytoliths, starch grains, geochemical signatures. In recent research, phytoliths grains are collected from surface samples paired with signatures, floral inventories, contemporary pollen signatures construct environmental analogues...
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