Revista de Biología Tropical
Revista de Biología Tropical / International Journal of Tropical Biology and Conservation, is a full open access journal from the University of Costa Rica focused on tropical biology and conservation. All issues, from 1953 to the present, are available for free download here.
OUR SCOPE (Objective)
Our journal publishes scientific articles that increase our understanding of biology, conservation, and biomedical life sciences in the tropics.
Selection criteria are the quantity and quality of new information and its potential interest to the general audience as well as to specialists. The studied ecosystems, or at least the organisms, must be tropical.
We give preference to feature articles that include testable study questions —for example, studies with an experimental design to evaluate factors that influence biological variables, or studies that explain the mechanisms underlying biological or biomedical phenomena such as, for example, behavior or physiology. Field studies should be extensive enough to identify temporal or spatial patterns. We also welcome systematic or phylogenetic studies above the species level, meta-analyses, and bibliometric studies that critically examine what is known and what remains to be done in any field of tropical biology.
Review articles are mostly published by invitation of the Editorial Board to recognized authorities. Other specialists interested in submitting a review must first send a titled outline to firstname.lastname@example.org. Accepted proposals receive the same evaluation as regular manuscripts.
All reviews and meta-analyses need to identify and fill gaps in knowledge, present methodological advances, and propose future research directions.
Note about old data: We encourage authors to compare old results with more recent data or to use the data within a meta-analysis. Studies based on data collected over six years ago must include a justification of why they are still of interest, and in the case of field studies, they need to present spatial patterns or temporal trends of historical significance. The Editorial Board evaluates the validity of methods and the relevance of results before sending the manuscript to reviewers.
The journal now has one issue per year (continuous publication from January 1st to December 31st) and publishes articles the same week that an edited version becomes available. Until 2021, it published four regular issues per year: issue 1 (January – March), issue 2 (April – June), issue 3 (July – September), and issue 4 (October – December).
We do not publish notes; short communications; species lists; single new species; range extensions; new records and other preliminary or short studies; or highly specialized technical reports based on protocols (e.g. agricultural, forestry, biochemical, microbiological, aquaculture, fishery or similar studies that only apply well known techniques to particular cases of local interest).
Special issues financed by research organizations are accepted after approval by the Editorial Board. They may contain a diversity of report types, including short papers, new records, new species descriptions, checklists, technical reports, etc. To publish a special issue, contact email@example.com for a cost estimate.
Researchers with an interest in studying all fields of tropical biology.
WHY PUBLISH IN REVISTA DE BIOLOGÍA TROPICAL?
- Fully indexed: Revista de Biología Tropical is included in Science Citation Index Expanded, REDIB Journals Ranking, Current Contents, Google Scholar, Biological Abstracts, and about 50 other international indices.
- Rapid decision and publication (7 days for first decision, 4-8 months from submission to publication).
- Fair: We use a double-blind system for a fair evaluation of manuscripts.
- High impact, not only because of its citation rate but also because it is widely read in countries with the highest tropical biodiversity, ensuring your article will have the most impact on the conservation of tropical biodiversity. Web of Science Impact Factor of 0.6. SJR Impact Factor of 0.28 (Q2).
- A personalized treatment by our dedicated staff.
- World Class Editorial and Scientific Boards.
- Open Access: All articles, since the first issue in 1953 to the present are freely available online (Archives) so they are more likely to be cited than articles behind pay-walls.
- FREE PUBLICATION: Each article receives 10 free pages of space in PDF format, which is enough for most scientific papers. Additional pages can be published in page layout format of the pdf at a cost of $50 each. Complementary material such as additional texts, figures, tables, graphics, and databases at a cost of $60. Contact firstname.lastname@example.org for more information.
- Impact of Collared Peccaries Dycotiles tajacu (Artiodactyla: Tayassuidae) on understory vegetation in the tropical rainforest of the Nogal-La Selva Biological Corridor, Costa Ricapor Marco Herminio Osorto Nuñez el febrero 21, 2024 a las 6:00 am
Introduction: Evidence suggests that herbivores, such as peccaries, shape vegetation structure and diversity through predation, trampling, dispersal, and rooting behavior. Objective: To evaluate the impact of peccaries (Dycotiles tajacu) on the understory vegetation of the tropical rainforest in the Nogal-La Selva Local Biological Corridor, Costa Rica, comparing a site with the absence of peccaries to another with the presence of these animals. Methodology: From June to November 2021, 20 experimental exclusions and 20 free access plots, each measuring 2 m2 were used to quantify herbivory, the number of leaf blades, damaged leaves, healthy leaves, sapling height, and fallen biomass at both sites. Results: A higher sapling density was found in the Nogal Reserve, but a lower sapling diversity, while in La Selva there was a higher sapling diversity, but a lower density of seedlings. Herbivory and sapling height in La Selva exceeded those in Nogal. The exclusion of peccaries reduced seedling damage but did not affect the dynamics of fallen biomass. Conclusion: For the design, implementation, and evaluation of the effectiveness of biological corridors, it is crucial to consider plant-animal interactions to enhance the flow of ecological processes through functional and structural connectivity, analyzed from interactions such as those presented in this paper.
- Elaeis guineensis (Arecaceae) residue as a fuel sorbent for passive application in fire-fighting engineeringpor Hazel Aragón el febrero 14, 2024 a las 6:00 am
Introduction: Spills of flammable liquids can lead to serious accidents, mainly in industrial plants and on roads. To prevent the spread of spills, various forms of collection are used, such as absorption with porous solids. Agroindustrial waste can be used as sorbent materials for flammable liquids. Objective: To determine the sorption capacity of the residual empty-fruit bunch of oil-palm (Elaeis guineensis) and the macaw palm (Acrocomia sp.) nutshell for four organic flammable liquids. Methods: The residual biomasses of E. guineensis and Acrocomia sp. were assessed as sorbents for spilled fuels (diesel, jet fuel, commercial kerosene, and gasoline). Volumetric measurement of liquid-fuel absorption at 24 ºC was taken during a week. Desorption was measured at 50 ºC as the drying kinetics, by using moisture scales. Results: The sorption capacity of the Acrocomia sp. material was not satisfactory, compared to the E. guineensis residual material, due to differences in the residual architecture of the organic material. This last can absorb 2.4 ± 0.2 cm3 g-1 at 24 ºC, during a one-week period. Diatomite absorbs greater quantities of the organic liquids but, the fluids diffusion at 50 ºC is 0.26 ± 0.09 times more slowly in the mineral matrix, because of the greater pore tortuosity in this mineral matrix. Conclusions: The oil-palm empty fruit bunch of E. guineensis, showed lesser but adequate performance than the sorbing behavior for fire hazard mitigation of diatomite. The nutshell of macaw palm (Acrocomia sp.) did not prove to be useful for this recovery operation.
- Precipitation explains Wood Thrush (Hylocichla mustelina) occupancy patterns in Northern Costa Ricapor Natalie Viviana Sánchez el febrero 13, 2024 a las 6:00 am
Introducción: El zorzal de bosque es un ave migratoria que ha experimentado caídas dramáticas en sus poblaciones en las últimas décadas. Esta especie pasa el invierno en fragmentos de bosque con niveles intermedios de modificación de hábitat en Centroamérica. Sin embargo, se necesitan más estudios que detallen el uso de los bosques remanentes a lo largo del tiempo para dilucidar las amenazas que enfrenta esta especie en las zonas de invernada. Objetivo: Comprender los efectos de variables ambientales y de estructura del bosque en la distribución del Zorzal del Bosque en el Norte de Costa Rica. Métodos: El área de estudio fue el Área de Conservación Guanacaste (ACG), ubicada en el Norte de Costa Rica, en diciembre de 2016, y en la temporada migratoria 2018-2019. Estimamos la ocupación y la probabilidad de detección del zorzal común en cuatro ubicaciones de ACG (bosque seco, bosque nuboso y dos ubicaciones en el bosque húmedo) utilizando modelos de ocupación de una sola temporada. También estimamos la ocupación del zorzal común y la probabilidad de persistencia en diferentes meses en tres tipos de vegetación (área abierta, bosque secundario y bosque primario) en el bosque húmedo de ACG utilizando un enfoque de modelo de ocupación multi-estacional. Resultados: La ocupación del Zorzal Común estuvo mejor descrita por la precipitación en las cuatro localidades del ACG; la probabilidad de ocupación aumentó con las precipitaciones. La ocupación media de zorzales varió con el tipo de vegetación: área abierta con arbustos y borde de bosque (0.69 ± 0.09), bosque secundario (0.46 ± 0.1) y bosque primario (0.61 ± 0.1). La probabilidad de persistencia del zorzal común respondió parcialmente a cambios en la precipitación, con un aumento inesperado en la persistencia cuando las precipitaciones continuaron disminuyendo en la temporada. Conclusión: Un incremento en la persistente ocupación de un sitio puede deberse al inicio de la temporada de reproducción de muchas aves residentes (enero-febrero), para evitar conflictos territoriales con otras especies de aves y conservar energía antes de la migración primaveral. La protección a largo plazo de los bosques húmedos en el norte de Costa Rica es de suma importancia para la conservación de los zorzales en sus zonas de invernada.
- Diversity of Leptohyphidae (Ephemeroptera) nymphs in the Quenane-Quenanito river, Colombian plain foothillspor Sara Velásquez-López el febrero 6, 2024 a las 6:00 am
Introduction: Various anthropic pressures affect the aquatic ecosystems of the foothills of Colombia. The response to environmental stressors is still unknown in bioindicator organisms such as Leptohyphidae. Objective: To determine the diversity of Leptohyphidae nymphs of the Quenane-Quenanito river, in two contrasting hydrological periods and its relationship with some physicochemical variables. Methods: In December (2014) and February (2015), organisms were collected with a Surber net at six stations along the current. Alpha and beta diversity was analyzed and redundancy analysis and generalized linear model were applied to establish the relationship between taxa and environmental variables. Results: Were identified 369 organisms belonging to four genera (Amanahyphes, Traverhyphes, Tricorythopsis, and Tricorythodes), two species, and eight morphospecies. Amanahyphes saguassu is reported for the first time for the Meta department. High diversity of Leptohyphidae nymphs was recorded in the transition to drought season and greater abundance in drought. Beta diversity indicated that the configuration of the assemblage changes spatially and temporally. Conclusions: Leptohyphidae organisms prefer fast habitats, particularly in the dry period where they find food (leaf litter, detritus) and shelter to establish themselves successfully; anthropic activities such as urbanization notably affect diversity. The high diversity recorded in this small stream in the foothills of the plains reflects the need to increase this type of works and collection efforts of study material in the region.
- Phylogenetic relationships of the Mangrove Hummingbird, “Amazilia” boucardi (Apodiformes: Trochilidae) of Costa Ricapor Federico J. Albertazzi el enero 29, 2024 a las 6:00 am
Introduction: A recent revision of the generic classification of the Trochilidae based on DNA sequences revealed many inconsistencies with the current generic classification, largely based on plumage characters subject to homoplasy, especially in the Trochilini, the largest tribe. A thorough generic reorganization brought the classification into accord with the phylogeny, but due to lack of genetic data, two species remained unclassified. One of these was the Mangrove Hummingbird, “Amazilia” boucardi, endemic to Costa Rica and included in the IUCN red list of threatened species. Objective: To obtain molecular evidence to clarify the generic relationships of “A.” boucardi. Methods: We isolated DNA from tissues of this species and amplified 4 nuclear and 4 mitochondrial fragments and compared these with homologous fragments from 56 species in the Trochilini, constructing phylogenetic trees with maximum likelihood and Bayesian methods. Results: Our phylogenetic analyses confirmed the placement of boucardi in the Trochilini and definitely excluded it from Amazilia but placed it with high confidence in the genus Chrysuronia Bonaparte, 1850, within which its closest relative is C. coeruleogularis, which also inhabits mangroves. Conclusions: Our genetic data based on nuclear and mitochondrial regions clearly indicate the relationship of A. boucardi and L. coeruleogularis. Moreover, it is also support by their habitat distribution in the mangroves of the Pacific coast of Costa Rica and Western Panama. Therefore, we suggested to exclude A. boucardi as "incertae sedis".