Forest Dynamics
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 |
Nitrogen Fixing Trees for Animal Production on Acid SoilsBackgroundNitrogen-fixing trees play a crucial role in improving pasture and livestock systems on acid soils, which are prevalent in tropical regions. Acid soils often challenge agricultural productivity due to low fertility and high aluminum toxicity. Nitrogen-fixing trees, such as Erythrina poeppigiana, Cratylia argentea, and Alnus acuminata, enhance soil chemistry and fertility by adding nitrogen through organic matter and improving physical soil properties like porosity and bulk density. They are integrated into silvopastoral systems, where trees and shrubs coexist with pastures, offering multiple benefits such as soil stabilization, increased forage quality, and diversified farm outputs. Open access copy available |
Alnus acuminata: Valuable Timber Tree for Tropical HighlandsBackgroundAlnus acuminata, also known as alder, is a nitrogen-fixing tree native to tropical highlands from Mexico to northern Argentina. It thrives in elevations between 1,200 and 3,200 meters, with annual rainfall of 1,000 to 3,000 mm and temperatures ranging from 4°C to 27°C. This species plays a significant role in watershed protection, soil enrichment, and sustainable timber production. Its adaptability to moist soils, including riverbanks and landslides, and its resilience in disturbed areas make it a valuable pioneer species. Farmers in regions like Costa Rica have used Alnus acuminata in agroforestry systems for over 90 years, integrating it with pastureland and coffee cultivation. Open access copy available |
Biodiversity conservation in Costa Rica: a correspondence analysis between identifi ed biodiversity hotspots (Araceae, Arecaceae, Bromeliaceae, and Scarabaeinae) and conservation priority life zonesBackgroundOpen access copy available |
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 |
Los bosques tropicales estacionalmente secos: ¿una prueba ácida para la restauración?BackgroundEl artículo explora los desafíos y avances en la restauración de bosques tropicales estacionalmente secos (BTES), uno de los ecosistemas más amenazados y menos estudiados del mundo. Aunque ocupan un 40% de las zonas tropicales, los BTES enfrentan altas tasas de deforestación, presión humana y vulnerabilidad al cambio climático, lo que subraya la necesidad urgente de estrategias efectivas de restauración. Open access copy available |
Uso del efecto de borde de la vegetación para la restauración ecológica del bosque tropicalBackgroundEl artículo aborda la fragmentación de hábitats causada por la deforestación, lo que genera cambios en los procesos ecológicos, específicamente el efecto de borde. Este efecto se caracteriza por la generación de microclimas variables y condiciones dinámicas del suelo en la interfase entre el bosque nativo y la vegetación adyacente inducida. A nivel global, los bosques tropicales han sufrido una deforestación considerable, impactando negativamente la biodiversidad y los ciclos ecológicos. Available with subscription or purchase |
Caracterización estructural y florística de un bosque secundario enriquecido de 15 años en la Región Tropical Húmeda de Costa RicaBackgroundEl estudio evalúa un bosque secundario enriquecido de 15 años en Costa Rica, originado en un pastizal abandonado. Los bosques secundarios son ecosistemas formados tras la eliminación de la cobertura primaria y tienen potencial económico, ambiental y de conservación de biodiversidad. Este caso analiza cómo la regeneración natural combinada con enriquecimiento puede mejorar su estructura y composición. Available with subscription or purchase |
The soil organic carbon in particle-size separates under different regrowth forest stands of north eastern Costa RicaBACKGROUND:Costa Rica, having experienced significant deforestation from 1950 to 1984, now sees a rise in secondary forests due to land abandonment and reforestation efforts. These forests vary widely in soil carbon accumulation, influenced by the previous land use intensity and the age of the forest. The paper investigates the role of secondary forests in Costa Rica in soil organic carbon (SOC) sequestration, a critical component in understanding climate change mitigation potential. Available with subscription or purchase |
Forty Years of Tropical Forest Recovery from Agriculture: Structure and Floristics of Secondary and Old-growth Riparian Forests in the Dominican RepublicBACKGROUND:The value of secondary forests in the tropics has received increased attention in recent years. The recovery of tropical forests from agricultural use, given the increase in abandoned agricultural lands, has gained momentum. Yet, few long-term studies of post-agriculture vegetation recovery in the tropics exist. The study compares 40-year-old secondary forests regenerating naturally after agricultural abandonment with old-growth forests in the Dominican Republic's Cordillera Central. Available with subscription or purchase |
