The Species Richness and Abundance of Macroinvertebrates Existing Within the Inflorescence of Heliconia imbricata at Two Different Sites in La Selva Biological Reserve, The Effects of Different Edge Types on Abiotic Characteristics of Primary and Secondary Tropical Dry Forests Comparison of the Relative Abundance and Diversity of Terrestrial Macroinvertebrates Between Regenerated and  a Primary Tropical Rainforest at La Selva The Filtration Effects of Palo Verde National Park Wetlands on Rice Field Agricultural Run Off. Tree of Life ( Guariacum sanctum) Study at Palo Verde National Park A Comparison of Soils from Two Diverse Wetland Areas in the Tempisque Watershed   Activity patterns of the Atta cephalotes (leaf cutter ant) under different variations of light on native tropical plantation trees What is the Effectiveness of Treatments on African Star Grass